案例分享仿QQ5.0側滑菜单ResideMenu

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本文由 孙国威 原创。如需转载,请注明出处!


为了兴许对这个项目进行优化,比方透明度动画、背景图的位移动画。以及性能上的优化。

我把这个项目上传到github上面,请大家随时关注。

github地址 https://github.com/sunguowei


近期项目要做一个QQ5.0的側滑菜单效果。和传统的側滑菜单存在着一些差异。

想必大家都已经见识过了。

为了不反复发明轮子,先去github上面搜索了一番。

发现了几个相似的,可是还是有一些不同。

以下是搜索到的相似的开源项目。

RESideMenu(ios项目)

https://github.com/romaonthego/RESideMenu

技术分享

androidResideMenu

https://github.com/SpecialCyCi/AndroidResideMenu

技术分享

ResideLayout

https://github.com/kyze8439690/ResideLayout

技术分享


研究了一下这些开源项目的源码。感觉并非特别适用于我们自己的项目。所以。我自己又研究了一下。最后的效果例如以下。当然了。还有非常多能够优化的地方,兴许再慢慢优化。

技术分享

备注:假设图片动画显示不出来,能够点击这个网址查看。

http://img.blog.csdn.net/20140902225149282?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbWFub2Vs/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast


我是基于SlidingMenu库进行的二次改动,添加了一些转场动画。

大家对这个库应该比較熟悉,以下是SlidingMenu的github地址。非常感谢Jeremy Feinstein提供的这个库,让广大Android Developers省去了非常多的麻烦。

https://github.com/jfeinstein10/SlidingMenu

备注:SlidingMenu使用了SherlockActionBar这个库,配置起来会比較麻烦,在文章的最后我会把demo上传,供大家下载,减去了大家自己配置项目的麻烦。

我主要改动了2个类,SlidingMenu.java和CustonViewAbove.java。仅仅是添加了一些功能。并没有改动原本的功能。

做了改动的地方,我做了中文凝视,事实上实现非常easy,几行代码而已。推荐大家下载Demo,然后自己调试一下。Demo的下载地址在文章的末尾。

废话不多说,直接上代码,稍微有点长。

public class SlidingMenu extends RelativeLayout {

	private static final String TAG = SlidingMenu.class.getSimpleName();

	public static final int SLIDING_WINDOW = 0;
	public static final int SLIDING_CONTENT = 1;
	private boolean mActionbarOverlay = false;

	/**
	 * Constant value for use with setTouchModeAbove(). Allows the SlidingMenu
	 * to be opened with a swipe gesture on the screen‘s margin
	 */
	public static final int TOUCHMODE_MARGIN = 0;

	/**
	 * Constant value for use with setTouchModeAbove(). Allows the SlidingMenu
	 * to be opened with a swipe gesture anywhere on the screen
	 */
	public static final int TOUCHMODE_FULLSCREEN = 1;

	/**
	 * Constant value for use with setTouchModeAbove(). Denies the SlidingMenu
	 * to be opened with a swipe gesture
	 */
	public static final int TOUCHMODE_NONE = 2;

	/**
	 * Constant value for use with setMode(). Puts the menu to the left of the
	 * content.
	 */
	public static final int LEFT = 0;

	/**
	 * Constant value for use with setMode(). Puts the menu to the right of the
	 * content.
	 */
	public static final int RIGHT = 1;

	/**
	 * Constant value for use with setMode(). Puts menus to the left and right
	 * of the content.
	 */
	public static final int LEFT_RIGHT = 2;

	private CustomViewAbove mViewAbove;

	private CustomViewBehind mViewBehind;

        /** 总体的背景,用一个ImageView取代 */
	private ImageView mViewBackground;

	private OnOpenListener mOpenListener;

	private OnOpenListener mSecondaryOpenListner;

	private OnCloseListener mCloseListener;

	/**
	 * The listener interface for receiving onOpen events. The class that is
	 * interested in processing a onOpen event implements this interface, and
	 * the object created with that class is registered with a component using
	 * the component‘s <code>addOnOpenListener<code> method. When
	 * the onOpen event occurs, that object‘s appropriate
	 * method is invoked
	 */
	public interface OnOpenListener {

		/**
		 * On open.
		 */
		public void onOpen();
	}

	/**
	 * The listener interface for receiving onOpened events. The class that is
	 * interested in processing a onOpened event implements this interface, and
	 * the object created with that class is registered with a component using
	 * the component‘s <code>addOnOpenedListener<code> method. When
	 * the onOpened event occurs, that object‘s appropriate
	 * method is invoked.
	 * 
	 * @see OnOpenedEvent
	 */
	public interface OnOpenedListener {

		/**
		 * On opened.
		 */
		public void onOpened();
	}

	/**
	 * The listener interface for receiving onClose events. The class that is
	 * interested in processing a onClose event implements this interface, and
	 * the object created with that class is registered with a component using
	 * the component‘s <code>addOnCloseListener<code> method. When
	 * the onClose event occurs, that object‘s appropriate
	 * method is invoked.
	 * 
	 * @see OnCloseEvent
	 */
	public interface OnCloseListener {

		/**
		 * On close.
		 */
		public void onClose();
	}

	/**
	 * The listener interface for receiving onClosed events. The class that is
	 * interested in processing a onClosed event implements this interface, and
	 * the object created with that class is registered with a component using
	 * the component‘s <code>addOnClosedListener<code> method. When
	 * the onClosed event occurs, that object‘s appropriate
	 * method is invoked.
	 * 
	 * @see OnClosedEvent
	 */
	public interface OnClosedListener {

		/**
		 * On closed.
		 */
		public void onClosed();
	}

	/**
	 * The Interface CanvasTransformer.
	 */
	public interface CanvasTransformer {

		/**
		 * Transform canvas.
		 * 
		 * @param canvas
		 *            the canvas
		 * @param percentOpen
		 *            the percent open
		 */
		public void transformCanvas(Canvas canvas, float percentOpen);
	}

	/**
	 * Instantiates a new SlidingMenu.
	 * 
	 * @param context
	 *            the associated Context
	 */
	public SlidingMenu(Context context) {
		this(context, null);
	}

	/**
	 * Instantiates a new SlidingMenu and attach to Activity.
	 * 
	 * @param activity
	 *            the activity to attach slidingmenu
	 * @param slideStyle
	 *            the slidingmenu style
	 */
	public SlidingMenu(Activity activity, int slideStyle) {
		this(activity, null);
		this.attachToActivity(activity, slideStyle);
	}

	/**
	 * Instantiates a new SlidingMenu.
	 * 
	 * @param context
	 *            the associated Context
	 * @param attrs
	 *            the attrs
	 */
	public SlidingMenu(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	/**
	 * Instantiates a new SlidingMenu.
	 * 
	 * @param context
	 *            the associated Context
	 * @param attrs
	 *            the attrs
	 * @param defStyle
	 *            the def style
	 */
	public SlidingMenu(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
                /** SlidingMenu是一个RelativeLayout,这里把背景图ImageView加入到RelativeLayout的最底层。

*/ LayoutParams backgroundParams = new LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); mViewBackground = new ImageView(context); mViewBackground.setScaleType(ImageView.ScaleType.CENTER_CROP); addView(mViewBackground, backgroundParams); LayoutParams behindParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); mViewBehind = new CustomViewBehind(context); addView(mViewBehind, behindParams); LayoutParams aboveParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); mViewAbove = new CustomViewAbove(context); addView(mViewAbove, aboveParams); // register the CustomViewBehind with the CustomViewAbove mViewAbove.setCustomViewBehind(mViewBehind); mViewBehind.setCustomViewAbove(mViewAbove); mViewAbove.setOnPageChangeListener(new OnPageChangeListener() { public static final int POSITION_OPEN = 0; public static final int POSITION_CLOSE = 1; public static final int POSITION_SECONDARY_OPEN = 2; public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } public void onPageSelected(int position) { if (position == POSITION_OPEN && mOpenListener != null) { mOpenListener.onOpen(); } else if (position == POSITION_CLOSE && mCloseListener != null) { mCloseListener.onClose(); } else if (position == POSITION_SECONDARY_OPEN && mSecondaryOpenListner != null) { mSecondaryOpenListner.onOpen(); } } }); // now style everything! TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SlidingMenu); // set the above and behind views if defined in xml int mode = ta.getInt(R.styleable.SlidingMenu_mode, LEFT); setMode(mode); int viewAbove = ta.getResourceId(R.styleable.SlidingMenu_viewAbove, -1); if (viewAbove != -1) { setContent(viewAbove); } else { setContent(new FrameLayout(context)); } int viewBehind = ta.getResourceId(R.styleable.SlidingMenu_viewBehind, -1); if (viewBehind != -1) { setMenu(viewBehind); } else { setMenu(new FrameLayout(context)); } int touchModeAbove = ta.getInt(R.styleable.SlidingMenu_touchModeAbove, TOUCHMODE_MARGIN); setTouchModeAbove(touchModeAbove); int touchModeBehind = ta.getInt( R.styleable.SlidingMenu_touchModeBehind, TOUCHMODE_MARGIN); setTouchModeBehind(touchModeBehind); int offsetBehind = (int) ta.getDimension( R.styleable.SlidingMenu_behindOffset, -1); int widthBehind = (int) ta.getDimension( R.styleable.SlidingMenu_behindWidth, -1); if (offsetBehind != -1 && widthBehind != -1) throw new IllegalStateException( "Cannot set both behindOffset and behindWidth for a SlidingMenu"); else if (offsetBehind != -1) setBehindOffset(offsetBehind); else if (widthBehind != -1) setBehindWidth(widthBehind); else setBehindOffset(0); float scrollOffsetBehind = ta.getFloat( R.styleable.SlidingMenu_behindScrollScale, 0.33f); setBehindScrollScale(scrollOffsetBehind); int shadowRes = ta.getResourceId( R.styleable.SlidingMenu_shadowDrawable, -1); if (shadowRes != -1) { setShadowDrawable(shadowRes); } int shadowWidth = (int) ta.getDimension( R.styleable.SlidingMenu_shadowWidth, 0); setShadowWidth(shadowWidth); boolean fadeEnabled = ta.getBoolean( R.styleable.SlidingMenu_fadeEnabled, true); setFadeEnabled(fadeEnabled); float fadeDeg = ta.getFloat(R.styleable.SlidingMenu_fadeDegree, 0.33f); setFadeDegree(fadeDeg); boolean selectorEnabled = ta.getBoolean( R.styleable.SlidingMenu_selectorEnabled, false); setSelectorEnabled(selectorEnabled); int selectorRes = ta.getResourceId( R.styleable.SlidingMenu_selectorDrawable, -1); if (selectorRes != -1) setSelectorDrawable(selectorRes); ta.recycle(); } /** * Attaches the SlidingMenu to an entire Activity * * @param activity * the Activity * @param slideStyle * either SLIDING_CONTENT or SLIDING_WINDOW */ public void attachToActivity(Activity activity, int slideStyle) { attachToActivity(activity, slideStyle, false); } /** * Attaches the SlidingMenu to an entire Activity * * @param activity * the Activity * @param slideStyle * either SLIDING_CONTENT or SLIDING_WINDOW * @param actionbarOverlay * whether or not the ActionBar is overlaid */ public void attachToActivity(Activity activity, int slideStyle, boolean actionbarOverlay) { if (slideStyle != SLIDING_WINDOW && slideStyle != SLIDING_CONTENT) throw new IllegalArgumentException( "slideStyle must be either SLIDING_WINDOW or SLIDING_CONTENT"); if (getParent() != null) throw new IllegalStateException( "This SlidingMenu appears to already be attached"); // get the window background TypedArray a = activity.getTheme().obtainStyledAttributes( new int[] { android.R.attr.windowBackground }); int background = a.getResourceId(0, 0); a.recycle(); switch (slideStyle) { case SLIDING_WINDOW: mActionbarOverlay = false; ViewGroup decor = (ViewGroup) activity.getWindow().getDecorView(); ViewGroup decorChild = (ViewGroup) decor.getChildAt(0); // save ActionBar themes that have transparent assets decorChild.setBackgroundResource(background); decor.removeView(decorChild); decor.addView(this); setContent(decorChild); break; case SLIDING_CONTENT: mActionbarOverlay = actionbarOverlay; // take the above view out of ViewGroup contentParent = (ViewGroup) activity .findViewById(android.R.id.content); View content = contentParent.getChildAt(0); contentParent.removeView(content); contentParent.addView(this); setContent(content); // save people from having transparent backgrounds if (content.getBackground() == null) content.setBackgroundResource(background); break; } } /** * Set the above view content from a layout resource. The resource will be * inflated, adding all top-level views to the above view. * * @param res * the new content */ public void setContent(int res) { setContent(LayoutInflater.from(getContext()).inflate(res, null)); } /** * Set the above view content to the given View. * * @param view * The desired content to display. */ public void setContent(View view) { mViewAbove.setContent(view); showContent(); } /** * 设置背景图片 * * @param resid */ public void setBackgroundImage(int resid) { mViewBackground.setBackgroundResource(resid); } /** * Retrieves the current content. * * @return the current content */ public View getContent() { return mViewAbove.getContent(); } /** * Set the behind view (menu) content from a layout resource. The resource * will be inflated, adding all top-level views to the behind view. * * @param res * the new content */ public void setMenu(int res) { setMenu(LayoutInflater.from(getContext()).inflate(res, null)); } /** * Set the behind view (menu) content to the given View. * * @param view * The desired content to display. */ public void setMenu(View v) { mViewBehind.setContent(v); } /** * Retrieves the main menu. * * @return the main menu */ public View getMenu() { return mViewBehind.getContent(); } /** * Set the secondary behind view (right menu) content from a layout * resource. The resource will be inflated, adding all top-level views to * the behind view. * * @param res * the new content */ public void setSecondaryMenu(int res) { setSecondaryMenu(LayoutInflater.from(getContext()).inflate(res, null)); } /** * Set the secondary behind view (right menu) content to the given View. * * @param view * The desired content to display. */ public void setSecondaryMenu(View v) { mViewBehind.setSecondaryContent(v); // mViewBehind.invalidate(); } /** * Retrieves the current secondary menu (right). * * @return the current menu */ public View getSecondaryMenu() { return mViewBehind.getSecondaryContent(); } /** * Sets the sliding enabled. * * @param b * true to enable sliding, false to disable it. */ public void setSlidingEnabled(boolean b) { mViewAbove.setSlidingEnabled(b); } /** * Checks if is sliding enabled. * * @return true, if is sliding enabled */ public boolean isSlidingEnabled() { return mViewAbove.isSlidingEnabled(); } /** * Sets which side the SlidingMenu should appear on. * * @param mode * must be either SlidingMenu.LEFT or SlidingMenu.RIGHT */ public void setMode(int mode) { if (mode != LEFT && mode != RIGHT && mode != LEFT_RIGHT) { throw new IllegalStateException( "SlidingMenu mode must be LEFT, RIGHT, or LEFT_RIGHT"); } mViewBehind.setMode(mode); } /** * Returns the current side that the SlidingMenu is on. * * @return the current mode, either SlidingMenu.LEFT or SlidingMenu.RIGHT */ public int getMode() { return mViewBehind.getMode(); } /** * Sets whether or not the SlidingMenu is in static mode (i.e. nothing is * moving and everything is showing) * * @param b * true to set static mode, false to disable static mode. */ public void setStatic(boolean b) { if (b) { setSlidingEnabled(false); mViewAbove.setCustomViewBehind(null); mViewAbove.setCurrentItem(1); // mViewBehind.setCurrentItem(0); } else { mViewAbove.setCurrentItem(1); // mViewBehind.setCurrentItem(1); mViewAbove.setCustomViewBehind(mViewBehind); setSlidingEnabled(true); } } /** * Opens the menu and shows the menu view. */ public void showMenu() { showMenu(true); } /** * Opens the menu and shows the menu view. * * @param animate * true to animate the transition, false to ignore animation */ public void showMenu(boolean animate) { mViewAbove.setCurrentItem(0, animate); } /** * Opens the menu and shows the secondary menu view. Will default to the * regular menu if there is only one. */ public void showSecondaryMenu() { showSecondaryMenu(true); } /** * Opens the menu and shows the secondary (right) menu view. Will default to * the regular menu if there is only one. * * @param animate * true to animate the transition, false to ignore animation */ public void showSecondaryMenu(boolean animate) { mViewAbove.setCurrentItem(2, animate); } /** * Closes the menu and shows the above view. */ public void showContent() { showContent(true); } /** * Closes the menu and shows the above view. * * @param animate * true to animate the transition, false to ignore animation */ public void showContent(boolean animate) { mViewAbove.setCurrentItem(1, animate); } /** * Toggle the SlidingMenu. If it is open, it will be closed, and vice versa. */ public void toggle() { toggle(true); } /** * Toggle the SlidingMenu. If it is open, it will be closed, and vice versa. * * @param animate * true to animate the transition, false to ignore animation */ public void toggle(boolean animate) { if (isMenuShowing()) { showContent(animate); } else { showMenu(animate); } } /** * Checks if is the behind view showing. * * @return Whether or not the behind view is showing */ public boolean isMenuShowing() { return mViewAbove.getCurrentItem() == 0 || mViewAbove.getCurrentItem() == 2; } /** * Checks if is the behind view showing. * * @return Whether or not the behind view is showing */ public boolean isSecondaryMenuShowing() { return mViewAbove.getCurrentItem() == 2; } /** * Gets the behind offset. * * @return The margin on the right of the screen that the behind view * scrolls to */ public int getBehindOffset() { return ((RelativeLayout.LayoutParams) mViewBehind.getLayoutParams()).rightMargin; } /** * Sets the behind offset. * * @param i * The margin, in pixels, on the right of the screen that the * behind view scrolls to. */ public void setBehindOffset(int i) { // RelativeLayout.LayoutParams params = // ((RelativeLayout.LayoutParams)mViewBehind.getLayoutParams()); // int bottom = params.bottomMargin; // int top = params.topMargin; // int left = params.leftMargin; // params.setMargins(left, top, i, bottom); mViewBehind.setWidthOffset(i); } /** * Sets the behind offset. * * @param resID * The dimension resource id to be set as the behind offset. The * menu, when open, will leave this width margin on the right of * the screen. */ public void setBehindOffsetRes(int resID) { int i = (int) getContext().getResources().getDimension(resID); setBehindOffset(i); } /** * Sets the above offset. * * @param i * the new above offset, in pixels */ public void setAboveOffset(int i) { mViewAbove.setAboveOffset(i); } /** * Sets the above offset. * * @param resID * The dimension resource id to be set as the above offset. */ public void setAboveOffsetRes(int resID) { int i = (int) getContext().getResources().getDimension(resID); setAboveOffset(i); } /** * Sets the behind width. * * @param i * The width the Sliding Menu will open to, in pixels */ @SuppressWarnings("deprecation") public void setBehindWidth(int i) { int width; Display display = ((WindowManager) getContext().getSystemService( Context.WINDOW_SERVICE)).getDefaultDisplay(); try { Class<?

> cls = Display.class; Class<?>[] parameterTypes = { Point.class }; Point parameter = new Point(); Method method = cls.getMethod("getSize", parameterTypes); method.invoke(display, parameter); width = parameter.x; } catch (Exception e) { width = display.getWidth(); } setBehindOffset(width - i); } /** * Sets the behind width. * * @param res * The dimension resource id to be set as the behind width * offset. The menu, when open, will open this wide. */ public void setBehindWidthRes(int res) { int i = (int) getContext().getResources().getDimension(res); setBehindWidth(i); } /** * Gets the behind scroll scale. * * @return The scale of the parallax scroll */ public float getBehindScrollScale() { return mViewBehind.getScrollScale(); } /** * Gets the touch mode margin threshold * * @return the touch mode margin threshold */ public int getTouchmodeMarginThreshold() { return mViewBehind.getMarginThreshold(); } /** * Set the touch mode margin threshold * * @param touchmodeMarginThreshold */ public void setTouchmodeMarginThreshold(int touchmodeMarginThreshold) { mViewBehind.setMarginThreshold(touchmodeMarginThreshold); } /** * Sets the behind scroll scale. * * @param f * The scale of the parallax scroll (i.e. 1.0f scrolls 1 pixel * for every 1 pixel that the above view scrolls and 0.0f scrolls * 0 pixels) */ public void setBehindScrollScale(float f) { if (f < 0 && f > 1) throw new IllegalStateException( "ScrollScale must be between 0 and 1"); mViewBehind.setScrollScale(f); } /** * Sets the behind canvas transformer. * * @param t * the new behind canvas transformer */ public void setBehindCanvasTransformer(CanvasTransformer t) { mViewBehind.setCanvasTransformer(t); } /** * 设置右側视图的转场动画 * * @param t * the new above canvas transformer */ public void setAboveCanvasTransformer(CanvasTransformer t) { mViewAbove.setCanvasTransformer(t); } /** * Gets the touch mode above. * * @return the touch mode above */ public int getTouchModeAbove() { return mViewAbove.getTouchMode(); } /** * Controls whether the SlidingMenu can be opened with a swipe gesture. * Options are {@link #TOUCHMODE_MARGIN TOUCHMODE_MARGIN}, * {@link #TOUCHMODE_FULLSCREEN TOUCHMODE_FULLSCREEN}, or * {@link #TOUCHMODE_NONE TOUCHMODE_NONE} * * @param i * the new touch mode */ public void setTouchModeAbove(int i) { if (i != TOUCHMODE_FULLSCREEN && i != TOUCHMODE_MARGIN && i != TOUCHMODE_NONE) { throw new IllegalStateException( "TouchMode must be set to either" + "TOUCHMODE_FULLSCREEN or TOUCHMODE_MARGIN or TOUCHMODE_NONE."); } mViewAbove.setTouchMode(i); } /** * Controls whether the SlidingMenu can be opened with a swipe gesture. * Options are {@link #TOUCHMODE_MARGIN TOUCHMODE_MARGIN}, * {@link #TOUCHMODE_FULLSCREEN TOUCHMODE_FULLSCREEN}, or * {@link #TOUCHMODE_NONE TOUCHMODE_NONE} * * @param i * the new touch mode */ public void setTouchModeBehind(int i) { if (i != TOUCHMODE_FULLSCREEN && i != TOUCHMODE_MARGIN && i != TOUCHMODE_NONE) { throw new IllegalStateException( "TouchMode must be set to either" + "TOUCHMODE_FULLSCREEN or TOUCHMODE_MARGIN or TOUCHMODE_NONE."); } mViewBehind.setTouchMode(i); } /** * Sets the shadow drawable. * * @param resId * the resource ID of the new shadow drawable */ public void setShadowDrawable(int resId) { setShadowDrawable(getContext().getResources().getDrawable(resId)); } /** * Sets the shadow drawable. * * @param d * the new shadow drawable */ public void setShadowDrawable(Drawable d) { mViewBehind.setShadowDrawable(d); } /** * Sets the secondary (right) shadow drawable. * * @param resId * the resource ID of the new shadow drawable */ public void setSecondaryShadowDrawable(int resId) { setSecondaryShadowDrawable(getContext().getResources().getDrawable( resId)); } /** * Sets the secondary (right) shadow drawable. * * @param d * the new shadow drawable */ public void setSecondaryShadowDrawable(Drawable d) { mViewBehind.setSecondaryShadowDrawable(d); } /** * Sets the shadow width. * * @param resId * The dimension resource id to be set as the shadow width. */ public void setShadowWidthRes(int resId) { setShadowWidth((int) getResources().getDimension(resId)); } /** * Sets the shadow width. * * @param pixels * the new shadow width, in pixels */ public void setShadowWidth(int pixels) { mViewBehind.setShadowWidth(pixels); } /** * Enables or disables the SlidingMenu‘s fade in and out * * @param b * true to enable fade, false to disable it */ public void setFadeEnabled(boolean b) { mViewBehind.setFadeEnabled(b); } /** * Sets how much the SlidingMenu fades in and out. Fade must be enabled, see * {@link #setFadeEnabled(boolean) setFadeEnabled(boolean)} * * @param f * the new fade degree, between 0.0f and 1.0f */ public void setFadeDegree(float f) { mViewBehind.setFadeDegree(f); } /** * Enables or disables whether the selector is drawn * * @param b * true to draw the selector, false to not draw the selector */ public void setSelectorEnabled(boolean b) { mViewBehind.setSelectorEnabled(true); } /** * Sets the selected view. The selector will be drawn here * * @param v * the new selected view */ public void setSelectedView(View v) { mViewBehind.setSelectedView(v); } /** * Sets the selector drawable. * * @param res * a resource ID for the selector drawable */ public void setSelectorDrawable(int res) { mViewBehind.setSelectorBitmap(BitmapFactory.decodeResource( getResources(), res)); } /** * Sets the selector drawable. * * @param b * the new selector bitmap */ public void setSelectorBitmap(Bitmap b) { mViewBehind.setSelectorBitmap(b); } /** * Add a View ignored by the Touch Down event when mode is Fullscreen * * @param v * a view to be ignored */ public void addIgnoredView(View v) { mViewAbove.addIgnoredView(v); } /** * Remove a View ignored by the Touch Down event when mode is Fullscreen * * @param v * a view not wanted to be ignored anymore */ public void removeIgnoredView(View v) { mViewAbove.removeIgnoredView(v); } /** * Clear the list of Views ignored by the Touch Down event when mode is * Fullscreen */ public void clearIgnoredViews() { mViewAbove.clearIgnoredViews(); } /** * Sets the OnOpenListener. {@link OnOpenListener#onOpen() * OnOpenListener.onOpen()} will be called when the SlidingMenu is opened * * @param listener * the new OnOpenListener */ public void setOnOpenListener(OnOpenListener listener) { // mViewAbove.setOnOpenListener(listener); mOpenListener = listener; } /** * Sets the OnOpenListner for secondary menu {@link OnOpenListener#onOpen() * OnOpenListener.onOpen()} will be called when the secondary SlidingMenu is * opened * * @param listener * the new OnOpenListener */ public void setSecondaryOnOpenListner(OnOpenListener listener) { mSecondaryOpenListner = listener; } /** * Sets the OnCloseListener. {@link OnCloseListener#onClose() * OnCloseListener.onClose()} will be called when any one of the SlidingMenu * is closed * * @param listener * the new setOnCloseListener */ public void setOnCloseListener(OnCloseListener listener) { // mViewAbove.setOnCloseListener(listener); mCloseListener = listener; } /** * Sets the OnOpenedListener. {@link OnOpenedListener#onOpened() * OnOpenedListener.onOpened()} will be called after the SlidingMenu is * opened * * @param listener * the new OnOpenedListener */ public void setOnOpenedListener(OnOpenedListener listener) { mViewAbove.setOnOpenedListener(listener); } /** * Sets the OnClosedListener. {@link OnClosedListener#onClosed() * OnClosedListener.onClosed()} will be called after the SlidingMenu is * closed * * @param listener * the new OnClosedListener */ public void setOnClosedListener(OnClosedListener listener) { mViewAbove.setOnClosedListener(listener); } public static class SavedState extends BaseSavedState { private final int mItem; public SavedState(Parcelable superState, int item) { super(superState); mItem = item; } private SavedState(Parcel in) { super(in); mItem = in.readInt(); } public int getItem() { return mItem; } /* * (non-Javadoc) * * @see android.view.AbsSavedState#writeToParcel(android.os.Parcel, int) */ public void writeToParcel(Parcel out, int flags) { super.writeToParcel(out, flags); out.writeInt(mItem); } public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() { public SavedState createFromParcel(Parcel in) { return new SavedState(in); } public SavedState[] newArray(int size) { return new SavedState[size]; } }; } /* * (non-Javadoc) * * @see android.view.View#onSaveInstanceState() */ @Override protected Parcelable onSaveInstanceState() { Parcelable superState = super.onSaveInstanceState(); SavedState ss = new SavedState(superState, mViewAbove.getCurrentItem()); return ss; } /* * (non-Javadoc) * * @see android.view.View#onRestoreInstanceState(android.os.Parcelable) */ @Override protected void onRestoreInstanceState(Parcelable state) { SavedState ss = (SavedState) state; super.onRestoreInstanceState(ss.getSuperState()); mViewAbove.setCurrentItem(ss.getItem()); } /* * (non-Javadoc) * * @see android.view.ViewGroup#fitSystemWindows(android.graphics.Rect) */ @SuppressLint("NewApi") @Override protected boolean fitSystemWindows(Rect insets) { int leftPadding = insets.left; int rightPadding = insets.right; int topPadding = insets.top; int bottomPadding = insets.bottom; if (!mActionbarOverlay) { Log.v(TAG, "setting padding!"); setPadding(leftPadding, topPadding, rightPadding, bottomPadding); } return true; } @TargetApi(Build.VERSION_CODES.HONEYCOMB) public void manageLayers(float percentOpen) { if (Build.VERSION.SDK_INT < 11) return; boolean layer = percentOpen > 0.0f && percentOpen < 1.0f; final int layerType = layer ?

View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_NONE; if (layerType != getContent().getLayerType()) { getHandler().post(new Runnable() { public void run() { Log.v(TAG, "changing layerType. hardware? " + (layerType == View.LAYER_TYPE_HARDWARE)); getContent().setLayerType(layerType, null); getMenu().setLayerType(layerType, null); if (getSecondaryMenu() != null) { getSecondaryMenu().setLayerType(layerType, null); } } }); } } }

public class CustomViewAbove extends ViewGroup {

	private static final String TAG = "CustomViewAbove";
	private static final boolean DEBUG = false;

	private static final boolean USE_CACHE = false;

	private static final int MAX_SETTLE_DURATION = 600; // ms
	private static final int MIN_DISTANCE_FOR_FLING = 25; // dips

	private static final Interpolator sInterpolator = new Interpolator() {
		public float getInterpolation(float t) {
			t -= 1.0f;
			return t * t * t * t * t + 1.0f;
		}
	};

	private View mContent;

	private int mCurItem;
	private Scroller mScroller;

	private boolean mScrollingCacheEnabled;

	private boolean mScrolling;

	private boolean mIsBeingDragged;
	private boolean mIsUnableToDrag;
	private int mTouchSlop;
	private float mInitialMotionX;
	/**
	 * Position of the last motion event.
	 */
	private float mLastMotionX;
	private float mLastMotionY;
	/**
	 * ID of the active pointer. This is used to retain consistency during
	 * drags/flings if multiple pointers are used.
	 */
	protected int mActivePointerId = INVALID_POINTER;
	/**
	 * Sentinel value for no current active pointer.
	 * Used by {@link #mActivePointerId}.
	 */
	private static final int INVALID_POINTER = -1;
        /** 保存转场动画的变量*/
	private CanvasTransformer mTransformer;
	
	/**
	 * Determines speed during touch scrolling
	 */
	protected VelocityTracker mVelocityTracker;
	private int mMinimumVelocity;
	protected int mMaximumVelocity;
	private int mFlingDistance;

	private CustomViewBehind mViewBehind;
	//	private int mMode;
	private boolean mEnabled = true;

	private OnPageChangeListener mOnPageChangeListener;
	private OnPageChangeListener mInternalPageChangeListener;

	//	private OnCloseListener mCloseListener;
	//	private OnOpenListener mOpenListener;
	private OnClosedListener mClosedListener;
	private OnOpenedListener mOpenedListener;

	private List<View> mIgnoredViews = new ArrayList<View>();

	//	private int mScrollState = SCROLL_STATE_IDLE;

	/**
	 * Callback interface for responding to changing state of the selected page.
	 */
	public interface OnPageChangeListener {

		/**
		 * This method will be invoked when the current page is scrolled, either as part
		 * of a programmatically initiated smooth scroll or a user initiated touch scroll.
		 *
		 * @param position Position index of the first page currently being displayed.
		 *                 Page position+1 will be visible if positionOffset is nonzero.
		 * @param positionOffset Value from [0, 1) indicating the offset from the page at position.
		 * @param positionOffsetPixels Value in pixels indicating the offset from position.
		 */
		public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels);

		/**
		 * This method will be invoked when a new page becomes selected. Animation is not
		 * necessarily complete.
		 *
		 * @param position Position index of the new selected page.
		 */
		public void onPageSelected(int position);

	}

	/**
	 * Simple implementation of the {@link OnPageChangeListener} interface with stub
	 * implementations of each method. Extend this if you do not intend to override
	 * every method of {@link OnPageChangeListener}.
	 */
	public static class SimpleOnPageChangeListener implements OnPageChangeListener {

		public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
			// This space for rent
		}

		public void onPageSelected(int position) {
			// This space for rent
		}

		public void onPageScrollStateChanged(int state) {
			// This space for rent
		}

	}

	public CustomViewAbove(Context context) {
		this(context, null);
	}

	public CustomViewAbove(Context context, AttributeSet attrs) {
		super(context, attrs);
		initCustomViewAbove();
	}

	void initCustomViewAbove() {
		setWillNotDraw(false);
		setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
		setFocusable(true);
		final Context context = getContext();
		mScroller = new Scroller(context, sInterpolator);
		final ViewConfiguration configuration = ViewConfiguration.get(context);
		mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
		mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
		mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
		setInternalPageChangeListener(new SimpleOnPageChangeListener() {
			public void onPageSelected(int position) {
				if (mViewBehind != null) {
					switch (position) {
					case 0:
					case 2:
						mViewBehind.setChildrenEnabled(true);
						break;
					case 1:
						mViewBehind.setChildrenEnabled(false);
						break;
					}
				}
			}
		});

		final float density = context.getResources().getDisplayMetrics().density;
		mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
	}

	/**
	 * Set the currently selected page. If the CustomViewPager has already been through its first
	 * layout there will be a smooth animated transition between the current item and the
	 * specified item.
	 *
	 * @param item Item index to select
	 */
	public void setCurrentItem(int item) {
		setCurrentItemInternal(item, true, false);
	}

	/**
	 * Set the currently selected page.
	 *
	 * @param item Item index to select
	 * @param smoothScroll True to smoothly scroll to the new item, false to transition immediately
	 */
	public void setCurrentItem(int item, boolean smoothScroll) {
		setCurrentItemInternal(item, smoothScroll, false);
	}

	public int getCurrentItem() {
		return mCurItem;
	}

	void setCurrentItemInternal(int item, boolean smoothScroll, boolean always) {
		setCurrentItemInternal(item, smoothScroll, always, 0);
	}

	void setCurrentItemInternal(int item, boolean smoothScroll, boolean always, int velocity) {
		if (!always && mCurItem == item) {
			setScrollingCacheEnabled(false);
			return;
		}

		item = mViewBehind.getMenuPage(item);

		final boolean dispatchSelected = mCurItem != item;
		mCurItem = item;
		final int destX = getDestScrollX(mCurItem);
		if (dispatchSelected && mOnPageChangeListener != null) {
			mOnPageChangeListener.onPageSelected(item);
		}
		if (dispatchSelected && mInternalPageChangeListener != null) {
			mInternalPageChangeListener.onPageSelected(item);
		}
		if (smoothScroll) {
			smoothScrollTo(destX, 0, velocity);
		} else {
			completeScroll();
			scrollTo(destX, 0);
		}
	}

	/**
	 * Set a listener that will be invoked whenever the page changes or is incrementally
	 * scrolled. See {@link OnPageChangeListener}.
	 *
	 * @param listener Listener to set
	 */
	public void setOnPageChangeListener(OnPageChangeListener listener) {
		mOnPageChangeListener = listener;
	}
	/*
	public void setOnOpenListener(OnOpenListener l) {
		mOpenListener = l;
	}

	public void setOnCloseListener(OnCloseListener l) {
		mCloseListener = l;
	}
	 */
	public void setOnOpenedListener(OnOpenedListener l) {
		mOpenedListener = l;
	}

	public void setOnClosedListener(OnClosedListener l) {
		mClosedListener = l;
	}

	/**
	 * Set a separate OnPageChangeListener for internal use by the support library.
	 *
	 * @param listener Listener to set
	 * @return The old listener that was set, if any.
	 */
	OnPageChangeListener setInternalPageChangeListener(OnPageChangeListener listener) {
		OnPageChangeListener oldListener = mInternalPageChangeListener;
		mInternalPageChangeListener = listener;
		return oldListener;
	}

	public void addIgnoredView(View v) {
		if (!mIgnoredViews.contains(v)) {
			mIgnoredViews.add(v);
		}
	}

	public void removeIgnoredView(View v) {
		mIgnoredViews.remove(v);
	}

	public void clearIgnoredViews() {
		mIgnoredViews.clear();
	}

	// We want the duration of the page snap animation to be influenced by the distance that
	// the screen has to travel, however, we don‘t want this duration to be effected in a
	// purely linear fashion. Instead, we use this method to moderate the effect that the distance
	// of travel has on the overall snap duration.
	float distanceInfluenceForSnapDuration(float f) {
		f -= 0.5f; // center the values about 0.
		f *= 0.3f * Math.PI / 2.0f;
		return (float) FloatMath.sin(f);
	}

	public int getDestScrollX(int page) {
		switch (page) {
		case 0:
		case 2:
			return mViewBehind.getMenuLeft(mContent, page);
		case 1:
			return mContent.getLeft();
		}
		return 0;
	}

	private int getLeftBound() {
		return mViewBehind.getAbsLeftBound(mContent);
	}

	private int getRightBound() {
		return mViewBehind.getAbsRightBound(mContent);
	}

	public int getContentLeft() {
		return mContent.getLeft() + mContent.getPaddingLeft();
	}

	public boolean isMenuOpen() {
		return mCurItem == 0 || mCurItem == 2;
	}

	private boolean isInIgnoredView(MotionEvent ev) {
		Rect rect = new Rect();
		for (View v : mIgnoredViews) {
			v.getHitRect(rect);
			if (rect.contains((int)ev.getX(), (int)ev.getY())) return true;
		}
		return false;
	}

	public int getBehindWidth() {
		if (mViewBehind == null) {
			return 0;
		} else {
			return mViewBehind.getBehindWidth();
		}
	}

	public int getChildWidth(int i) {
		switch (i) {
		case 0:
			return getBehindWidth();
		case 1:
			return mContent.getWidth();
		default:
			return 0;
		}
	}

	public boolean isSlidingEnabled() {
		return mEnabled;
	}

	public void setSlidingEnabled(boolean b) {
		mEnabled = b;
	}

	/**
	 * Like {@link View#scrollBy}, but scroll smoothly instead of immediately.
	 *
	 * @param x the number of pixels to scroll by on the X axis
	 * @param y the number of pixels to scroll by on the Y axis
	 */
	void smoothScrollTo(int x, int y) {
		smoothScrollTo(x, y, 0);
	}

	/**
	 * Like {@link View#scrollBy}, but scroll smoothly instead of immediately.
	 *
	 * @param x the number of pixels to scroll by on the X axis
	 * @param y the number of pixels to scroll by on the Y axis
	 * @param velocity the velocity associated with a fling, if applicable. (0 otherwise)
	 */
	void smoothScrollTo(int x, int y, int velocity) {
		if (getChildCount() == 0) {
			// Nothing to do.
			setScrollingCacheEnabled(false);
			return;
		}
		int sx = getScrollX();
		int sy = getScrollY();
		int dx = x - sx;
		int dy = y - sy;
		if (dx == 0 && dy == 0) {
			completeScroll();
			if (isMenuOpen()) {
				if (mOpenedListener != null)
					mOpenedListener.onOpened();
			} else {
				if (mClosedListener != null)
					mClosedListener.onClosed();
			}
			return;
		}

		setScrollingCacheEnabled(true);
		mScrolling = true;

		final int width = getBehindWidth();
		final int halfWidth = width / 2;
		final float distanceRatio = Math.min(1f, 1.0f * Math.abs(dx) / width);
		final float distance = halfWidth + halfWidth *
				distanceInfluenceForSnapDuration(distanceRatio);

		int duration = 0;
		velocity = Math.abs(velocity);
		if (velocity > 0) {
			duration = 4 * Math.round(1000 * Math.abs(distance / velocity));
		} else {
			final float pageDelta = (float) Math.abs(dx) / width;
			duration = (int) ((pageDelta + 1) * 100);
			duration = MAX_SETTLE_DURATION;
		}
		duration = Math.min(duration, MAX_SETTLE_DURATION);

		mScroller.startScroll(sx, sy, dx, dy, duration);
		invalidate();
	}

	public void setContent(View v) {
		if (mContent != null) 
			this.removeView(mContent);
		mContent = v;
		addView(mContent);
	}

	public View getContent() {
		return mContent;
	}

	public void setCustomViewBehind(CustomViewBehind cvb) {
		mViewBehind = cvb;
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

		int width = getDefaultSize(0, widthMeasureSpec);
		int height = getDefaultSize(0, heightMeasureSpec);
		setMeasuredDimension(width, height);

		final int contentWidth = getChildMeasureSpec(widthMeasureSpec, 0, width);
		final int contentHeight = getChildMeasureSpec(heightMeasureSpec, 0, height);
		mContent.measure(contentWidth, contentHeight);
	}

	@Override
	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
		super.onSizeChanged(w, h, oldw, oldh);
		// Make sure scroll position is set correctly.
		if (w != oldw) {
			// [ChrisJ] - This fixes the onConfiguration change for orientation issue..
			// maybe worth having a look why the recomputeScroll pos is screwing
			// up?
			completeScroll();
			scrollTo(getDestScrollX(mCurItem), getScrollY());
		}
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		final int width = r - l;
		final int height = b - t;
		mContent.layout(0, 0, width, height);
	}

	public void setAboveOffset(int i) {
		//		RelativeLayout.LayoutParams params = ((RelativeLayout.LayoutParams)mContent.getLayoutParams());
		//		params.setMargins(i, params.topMargin, params.rightMargin, params.bottomMargin);
		mContent.setPadding(i, mContent.getPaddingTop(), 
				mContent.getPaddingRight(), mContent.getPaddingBottom());
	}


	@Override
	public void computeScroll() {
		if (!mScroller.isFinished()) {
			if (mScroller.computeScrollOffset()) {
				int oldX = getScrollX();
				int oldY = getScrollY();
				int x = mScroller.getCurrX();
				int y = mScroller.getCurrY();

				if (oldX != x || oldY != y) {
					scrollTo(x, y);
					pageScrolled(x);
				}

				// Keep on drawing until the animation has finished.
				invalidate();
				return;
			}
		}

		// Done with scroll, clean up state.
		completeScroll();
	}

	private void pageScrolled(int xpos) {
		final int widthWithMargin = getWidth();
		final int position = xpos / widthWithMargin;
		final int offsetPixels = xpos % widthWithMargin;
		final float offset = (float) offsetPixels / widthWithMargin;

		onPageScrolled(position, offset, offsetPixels);
	}

	/**
	 * This method will be invoked when the current page is scrolled, either as part
	 * of a programmatically initiated smooth scroll or a user initiated touch scroll.
	 * If you override this method you must call through to the superclass implementation
	 * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled
	 * returns.
	 *
	 * @param position Position index of the first page currently being displayed.
	 *                 Page position+1 will be visible if positionOffset is nonzero.
	 * @param offset Value from [0, 1) indicating the offset from the page at position.
	 * @param offsetPixels Value in pixels indicating the offset from position.
	 */
	protected void onPageScrolled(int position, float offset, int offsetPixels) {
		if (mOnPageChangeListener != null) {
			mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels);
		}
		if (mInternalPageChangeListener != null) {
			mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels);
		}
	}

	private void completeScroll() {
		boolean needPopulate = mScrolling;
		if (needPopulate) {
			// Done with scroll, no longer want to cache view drawing.
			setScrollingCacheEnabled(false);
			mScroller.abortAnimation();
			int oldX = getScrollX();
			int oldY = getScrollY();
			int x = mScroller.getCurrX();
			int y = mScroller.getCurrY();
			if (oldX != x || oldY != y) {
				scrollTo(x, y);
			}
			if (isMenuOpen()) {
				if (mOpenedListener != null)
					mOpenedListener.onOpened();
			} else {
				if (mClosedListener != null)
					mClosedListener.onClosed();
			}
		}
		mScrolling = false;
	}

	protected int mTouchMode = SlidingMenu.TOUCHMODE_MARGIN;

	public void setTouchMode(int i) {
		mTouchMode = i;
	}

	public int getTouchMode() {
		return mTouchMode;
	}

	private boolean thisTouchAllowed(MotionEvent ev) {
		int x = (int) (ev.getX() + mScrollX);
		if (isMenuOpen()) {
			return mViewBehind.menuOpenTouchAllowed(mContent, mCurItem, x);
		} else {
			switch (mTouchMode) {
			case SlidingMenu.TOUCHMODE_FULLSCREEN:
				return !isInIgnoredView(ev);
			case SlidingMenu.TOUCHMODE_NONE:
				return false;
			case SlidingMenu.TOUCHMODE_MARGIN:
				return mViewBehind.marginTouchAllowed(mContent, x);
			}
		}
		return false;
	}

	private boolean thisSlideAllowed(float dx) {
		boolean allowed = false;
		if (isMenuOpen()) {
			allowed = mViewBehind.menuOpenSlideAllowed(dx);
		} else {
			allowed = mViewBehind.menuClosedSlideAllowed(dx);
		}
		if (DEBUG)
			Log.v(TAG, "this slide allowed " + allowed + " dx: " + dx);
		return allowed;
	}

	private int getPointerIndex(MotionEvent ev, int id) {
		int activePointerIndex = MotionEventCompat.findPointerIndex(ev, id);
		if (activePointerIndex == -1)
			mActivePointerId = INVALID_POINTER;
		return activePointerIndex;
	}

	private boolean mQuickReturn = false;

	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {

		if (!mEnabled)
			return false;

		final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

		if (DEBUG)
			if (action == MotionEvent.ACTION_DOWN)
				Log.v(TAG, "Received ACTION_DOWN");

		if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP
				|| (action != MotionEvent.ACTION_DOWN && mIsUnableToDrag)) {
			endDrag();
			return false;
		}

		switch (action) {
		case MotionEvent.ACTION_MOVE:
			determineDrag(ev);
			break;
		case MotionEvent.ACTION_DOWN:
			int index = MotionEventCompat.getActionIndex(ev);
			mActivePointerId = MotionEventCompat.getPointerId(ev, index);
			if (mActivePointerId == INVALID_POINTER)
				break;
			mLastMotionX = mInitialMotionX = MotionEventCompat.getX(ev, index);
			mLastMotionY = MotionEventCompat.getY(ev, index);
			if (thisTouchAllowed(ev)) {
				mIsBeingDragged = false;
				mIsUnableToDrag = false;
				if (isMenuOpen() && mViewBehind.menuTouchInQuickReturn(mContent, mCurItem, ev.getX() + mScrollX)) {
					mQuickReturn = true;
				}
			} else {
				mIsUnableToDrag = true;
			}
			break;
		case MotionEventCompat.ACTION_POINTER_UP:
			onSecondaryPointerUp(ev);
			break;
		}

		if (!mIsBeingDragged) {
			if (mVelocityTracker == null) {
				mVelocityTracker = VelocityTracker.obtain();
			}
			mVelocityTracker.addMovement(ev);
		}
		return mIsBeingDragged || mQuickReturn;
	}


	@Override
	public boolean onTouchEvent(MotionEvent ev) {

		if (!mEnabled)
			return false;

		if (!mIsBeingDragged && !thisTouchAllowed(ev))
			return false;

		//		if (!mIsBeingDragged && !mQuickReturn)
		//			return false;

		final int action = ev.getAction();

		if (mVelocityTracker == null) {
			mVelocityTracker = VelocityTracker.obtain();
		}
		mVelocityTracker.addMovement(ev);

		switch (action & MotionEventCompat.ACTION_MASK) {
		case MotionEvent.ACTION_DOWN:
			/*
			 * If being flinged and user touches, stop the fling. isFinished
			 * will be false if being flinged.
			 */
			completeScroll();

			// Remember where the motion event started
			int index = MotionEventCompat.getActionIndex(ev);
			mActivePointerId = MotionEventCompat.getPointerId(ev, index);
			mLastMotionX = mInitialMotionX = ev.getX();
			break;
		case MotionEvent.ACTION_MOVE:
			if (!mIsBeingDragged) {	
				determineDrag(ev);
				if (mIsUnableToDrag)
					return false;
			}
			if (mIsBeingDragged) {
				// Scroll to follow the motion event
				final int activePointerIndex = getPointerIndex(ev, mActivePointerId);
				if (mActivePointerId == INVALID_POINTER)
					break;
				final float x = MotionEventCompat.getX(ev, activePointerIndex);
				final float deltaX = mLastMotionX - x;
				mLastMotionX = x;
				float oldScrollX = getScrollX();
				float scrollX = oldScrollX + deltaX;
				final float leftBound = getLeftBound();
				final float rightBound = getRightBound();
				if (scrollX < leftBound) {
					scrollX = leftBound;
				} else if (scrollX > rightBound) {
					scrollX = rightBound;
				}
				// Don‘t lose the rounded component
				mLastMotionX += scrollX - (int) scrollX;
				scrollTo((int) scrollX, getScrollY());
				pageScrolled((int) scrollX);
			}
			break;
		case MotionEvent.ACTION_UP:
			if (mIsBeingDragged) {
				final VelocityTracker velocityTracker = mVelocityTracker;
				velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
				int initialVelocity = (int) VelocityTrackerCompat.getXVelocity(
						velocityTracker, mActivePointerId);
				final int scrollX = getScrollX();
				final float pageOffset = (float) (scrollX - getDestScrollX(mCurItem)) / getBehindWidth();
				final int activePointerIndex = getPointerIndex(ev, mActivePointerId);
				if (mActivePointerId != INVALID_POINTER) {
					final float x = MotionEventCompat.getX(ev, activePointerIndex);
					final int totalDelta = (int) (x - mInitialMotionX);
					int nextPage = determineTargetPage(pageOffset, initialVelocity, totalDelta);
					setCurrentItemInternal(nextPage, true, true, initialVelocity);
				} else {	
					setCurrentItemInternal(mCurItem, true, true, initialVelocity);
				}
				mActivePointerId = INVALID_POINTER;
				endDrag();
			} else if (mQuickReturn && mViewBehind.menuTouchInQuickReturn(mContent, mCurItem, ev.getX() + mScrollX)) {
				// close the menu
				setCurrentItem(1);
				endDrag();
			}
			break;
		case MotionEvent.ACTION_CANCEL:
			if (mIsBeingDragged) {
				setCurrentItemInternal(mCurItem, true, true);
				mActivePointerId = INVALID_POINTER;
				endDrag();
			}
			break;
		case MotionEventCompat.ACTION_POINTER_DOWN: {
			final int indexx = MotionEventCompat.getActionIndex(ev);
			mLastMotionX = MotionEventCompat.getX(ev, indexx);
			mActivePointerId = MotionEventCompat.getPointerId(ev, indexx);
			break;
		}
		case MotionEventCompat.ACTION_POINTER_UP:
			onSecondaryPointerUp(ev);
			int pointerIndex = getPointerIndex(ev, mActivePointerId);
			if (mActivePointerId == INVALID_POINTER)
				break;
			mLastMotionX = MotionEventCompat.getX(ev, pointerIndex);
			break;
		}
		return true;
	}
	
	private void determineDrag(MotionEvent ev) {
		final int activePointerId = mActivePointerId;
		final int pointerIndex = getPointerIndex(ev, activePointerId);
		if (activePointerId == INVALID_POINTER || pointerIndex == INVALID_POINTER)
			return;
		final float x = MotionEventCompat.getX(ev, pointerIndex);
		final float dx = x - mLastMotionX;
		final float xDiff = Math.abs(dx);
		final float y = MotionEventCompat.getY(ev, pointerIndex);
		final float dy = y - mLastMotionY;
		final float yDiff = Math.abs(dy);
		if (xDiff > (isMenuOpen()?

mTouchSlop/2:mTouchSlop) && xDiff > yDiff && thisSlideAllowed(dx)) { startDrag(); mLastMotionX = x; mLastMotionY = y; setScrollingCacheEnabled(true); // TODO add back in touch slop check } else if (xDiff > mTouchSlop) { mIsUnableToDrag = true; } } @Override public void scrollTo(int x, int y) { super.scrollTo(x, y); mScrollX = x; mViewBehind.scrollBehindTo(mContent, x, y); ((SlidingMenu)getParent()).manageLayers(getPercentOpen()); if (mTransformer != null) { invalidate(); } } private int determineTargetPage(float pageOffset, int velocity, int deltaX) { int targetPage = mCurItem; if (Math.abs(deltaX) > mFlingDistance && Math.abs(velocity) > mMinimumVelocity) { if (velocity > 0 && deltaX > 0) { targetPage -= 1; } else if (velocity < 0 && deltaX < 0){ targetPage += 1; } } else { targetPage = (int) Math.round(mCurItem + pageOffset); } return targetPage; } protected float getPercentOpen() { return Math.abs(mScrollX-mContent.getLeft()) / getBehindWidth(); } @Override protected void dispatchDraw(Canvas canvas) { // 这句要凝视掉,否则会出现2个右側的视图,一个有转场动画,一个没有转场动画 // super.dispatchDraw(canvas); // Draw the margin drawable if needed. mViewBehind.drawShadow(mContent, canvas); mViewBehind.drawFade(mContent, canvas, getPercentOpen()); mViewBehind.drawSelector(mContent, canvas, getPercentOpen()); // 设置右側视图的转场效果,主要是改动Canvas。 if (mTransformer != null) { canvas.save(); mTransformer.transformCanvas(canvas, getPercentOpen()); super.dispatchDraw(canvas); canvas.restore(); } else { super.dispatchDraw(canvas); } } // variables for drawing private float mScrollX = 0.0f; private void onSecondaryPointerUp(MotionEvent ev) { if (DEBUG) Log.v(TAG, "onSecondaryPointerUp called"); final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { // This was our active pointer going up. Choose a new // active pointer and adjust accordingly. final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mLastMotionX = MotionEventCompat.getX(ev, newPointerIndex); mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); if (mVelocityTracker != null) { mVelocityTracker.clear(); } } } private void startDrag() { mIsBeingDragged = true; mQuickReturn = false; } private void endDrag() { mQuickReturn = false; mIsBeingDragged = false; mIsUnableToDrag = false; mActivePointerId = INVALID_POINTER; if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } private void setScrollingCacheEnabled(boolean enabled) { if (mScrollingCacheEnabled != enabled) { mScrollingCacheEnabled = enabled; if (USE_CACHE) { final int size = getChildCount(); for (int i = 0; i < size; ++i) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { child.setDrawingCacheEnabled(enabled); } } } } } /** * Tests scrollability within child views of v given a delta of dx. * * @param v View to test for horizontal scrollability * @param checkV Whether the view v passed should itself be checked for scrollability (true), * or just its children (false). * @param dx Delta scrolled in pixels * @param x X coordinate of the active touch point * @param y Y coordinate of the active touch point * @return true if child views of v can be scrolled by delta of dx. */ protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) { if (v instanceof ViewGroup) { final ViewGroup group = (ViewGroup) v; final int scrollX = v.getScrollX(); final int scrollY = v.getScrollY(); final int count = group.getChildCount(); // Count backwards - let topmost views consume scroll distance first. for (int i = count - 1; i >= 0; i--) { final View child = group.getChildAt(i); if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child, true, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) { return true; } } } return checkV && ViewCompat.canScrollHorizontally(v, -dx); } @Override public boolean dispatchKeyEvent(KeyEvent event) { // Let the focused view and/or our descendants get the key first return super.dispatchKeyEvent(event) || executeKeyEvent(event); } /** * You can call this function yourself to have the scroll view perform * scrolling from a key event, just as if the event had been dispatched to * it by the view hierarchy. * * @param event The key event to execute. * @return Return true if the event was handled, else false. */ public boolean executeKeyEvent(KeyEvent event) { boolean handled = false; if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (event.getKeyCode()) { case KeyEvent.KEYCODE_DPAD_LEFT: handled = arrowScroll(FOCUS_LEFT); break; case KeyEvent.KEYCODE_DPAD_RIGHT: handled = arrowScroll(FOCUS_RIGHT); break; case KeyEvent.KEYCODE_TAB: if (Build.VERSION.SDK_INT >= 11) { // The focus finder had a bug handling FOCUS_FORWARD and FOCUS_BACKWARD // before Android 3.0. Ignore the tab key on those devices. if (KeyEventCompat.hasNoModifiers(event)) { handled = arrowScroll(FOCUS_FORWARD); } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { handled = arrowScroll(FOCUS_BACKWARD); } } break; } } return handled; } public boolean arrowScroll(int direction) { View currentFocused = findFocus(); if (currentFocused == this) currentFocused = null; boolean handled = false; View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); if (nextFocused != null && nextFocused != currentFocused) { if (direction == View.FOCUS_LEFT) { handled = nextFocused.requestFocus(); } else if (direction == View.FOCUS_RIGHT) { // If there is nothing to the right, or this is causing us to // jump to the left, then what we really want to do is page right. if (currentFocused != null && nextFocused.getLeft() <= currentFocused.getLeft()) { handled = pageRight(); } else { handled = nextFocused.requestFocus(); } } } else if (direction == FOCUS_LEFT || direction == FOCUS_BACKWARD) { // Trying to move left and nothing there; try to page. handled = pageLeft(); } else if (direction == FOCUS_RIGHT || direction == FOCUS_FORWARD) { // Trying to move right and nothing there; try to page. handled = pageRight(); } if (handled) { playSoundEffect(SoundEffectConstants.getContantForFocusDirection(direction)); } return handled; } boolean pageLeft() { if (mCurItem > 0) { setCurrentItem(mCurItem-1, true); return true; } return false; } boolean pageRight() { if (mCurItem < 1) { setCurrentItem(mCurItem+1, true); return true; } return false; } public void setCanvasTransformer(CanvasTransformer t) { mTransformer = t; } }

假设想要使用这个側滑菜单的动画效果,直接替换这两个类就可以。同一时候,并不会影响SlidingMenu的固有功能。

以下看看怎样配置SlidingMenu实例。

		SlidingMenu sm = getSlidingMenu();
		sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
		sm.setFadeEnabled(false);
		sm.setBehindScrollScale(0.25f);
		sm.setFadeDegree(0.25f);

		// 配置背景图片
		sm.setBackgroundImage(R.drawable.img_frame_background);
		// 设置专场动画效果
		sm.setBehindCanvasTransformer(new SlidingMenu.CanvasTransformer() {
			@Override
			public void transformCanvas(Canvas canvas, float percentOpen) {
				float scale = (float) (percentOpen * 0.25 + 0.75);
				canvas.scale(scale, scale, -canvas.getWidth() / 2,
						canvas.getHeight() / 2);
			}
		});

		sm.setAboveCanvasTransformer(new SlidingMenu.CanvasTransformer() {
			@Override
			public void transformCanvas(Canvas canvas, float percentOpen) {
				float scale = (float) (1 - percentOpen * 0.25);
				canvas.scale(scale, scale, 0, canvas.getHeight() / 2);
			}
		});

	}

大功告成。

最后,附上Demo的下载地址。

GitHub https://github.com/sunguowei/Android-ResideMenu

CSDN资源   http://download.csdn.net/detail/manoel/7857771

百度网盘    http://pan.baidu.com/s/1jGrASui


关于这个框架后期的优化。请关注我的github。

https://github.com/sunguowei


Okay,要说的就这么多,希望能给大家带来一些帮助。


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