两步集成TV移动框架，从未如此简单

Posted 2022-12-03 单灿灿

本篇文章已授权微信公众号DriodDeveloper（逆流的鱼yuiop）独家发布

从初TV开发到现在，在移动边框上用过很多方法。

下面我来简单的列出来使用过那些解决方法和思路：

• 1，在所有需要放大和设置边框的View下方嵌套一层FrameLayout，作为放大的背景的容器。焦点移动上去，算出当前View的大小，然后再设置FrameLayout的大小与.9图片并bringtoFront（）；
• 2，为每个需要放大与突出的View设置shape和selector，这个是我最推荐的方法，现在很多TV的APP都采用这种，但是有个缺点，发光和阴影并不能设置。这与需要稍微有点炫酷效果的桌面有点不符合。
• 3，全局FrameLayout，这个是我现在在用的方法，现在已经整理成一套框架，不久就会开源，现在还有示例Demo未完成。

下面让我们来进入我的框架的主题来看一下：

红圈所标出来的是几个主要的类与自定义View，下面我们来深入(我在设计的时候，焦点处理是各自处理各自的，解耦)。

先上两幅比较难的界面（重点在于焦点的处理与动画的处理，图一有动态的添加和删除）。

最主要的接口MoveAnimationHelper（做动画效果的）如下：

/**
 * Created by ShanCanCan on 2016/4/3 0003.
 */

public interface MoveAnimationHelper 

    void drawMoveView(Canvas canvas);//绘制MoveView

    void setFocusView(View currentView, View oldView, float scale);  //放大缩小函数

    void rectMoveAnimation(View currentView, float scaleX, float scaleY);// 边框移动函数

     MoveFrameLayout getMoveView(); //边框view

    void setMoveView(MoveFrameLayout moveView);//setMoveView

    void setTranDurAnimTime(int time);//设置移动时间

    void setDrawUpRectEnabled(boolean isDrawUpRect);//是否凸出显示

MoveFrameLayout是全局的移动飞框，就像文章开头的1的实现类似，但是全局只有一个。

最主要的绘制函数就是 MoveFrameLayout这个类了，这个类就是我们的边框移动 View，这个 View 主要实现边框的生成与移动，还有阴影的添加

/**
 *
 * Created by ShanCanCan on 2016/4/3 0003.
 */

public class MoveFrameLayout extends FrameLayout 

    private static final String TAG = "MoveFramLayout";
    private Context mContext;
    private Drawable mRectUpDrawable;
    private Drawable mRectUpShade;
    private MoveAnimationHelper mMoveAnimationHelper;

    private RectF mShadowPaddingRect = new RectF();
    private RectF mUpPaddingRect = new RectF();


    public MoveFrameLayout(Context context) 
        super(context);
        init(context);
    


    public MoveFrameLayout(Context context, AttributeSet attrs) 
        super(context, attrs);
        init(context);
    

    public MoveFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) 
        super(context, attrs, defStyleAttr);
        init(context);
    

    private void init(Context context) 
        mContext = context;
        setWillNotDraw(false);//必须要设置，如果我们想要重写onDraw，就要调用setWillNotDraw（false）
        mMoveAnimationHelper = new MoveAnimationHelperImplement();//动画的实现类，接下来就要讲解
        mMoveAnimationHelper.setMoveView(this);

    

    /*下面的方法基本是调用MoveAnimationHelperImplement的实现方法，来进行我们的放大缩小以及其他展示*/

    public void setFocusView(View currentView, View oldView, float scale) 
        mMoveAnimationHelper.setFocusView(currentView, oldView, scale);

    

    public View getUpView() 
        return this;
    


    @Override
    protected void onDraw(Canvas canvas) 

        if (mMoveAnimationHelper != null) 
            mMoveAnimationHelper.drawMoveView(canvas);
            return;
        
        super.onDraw(canvas);

    

    public void setUpRectResource(int id) 
        try 
            this.mRectUpDrawable = mContext.getResources().getDrawable(id); // 移动的边框.
            invalidate();
         catch (Exception e) 
            e.printStackTrace();
        
    

    public void setUpRectShadeResource(int id) 

        this.mRectUpShade = mContext.getResources().getDrawable(id); // 移动的边框.
        invalidate();

    
    public Drawable getShadowDrawable() 
        return this.mRectUpShade;
    


    public Drawable getUpRectDrawable() 
        return this.mRectUpDrawable;
    

    public RectF getDrawShadowRect() 
        return this.mShadowPaddingRect;
    

    public RectF getDrawUpRect() 
        return this.mUpPaddingRect;
    

    public void setUpPaddingRect(RectF upPaddingRect) 
        mUpPaddingRect = upPaddingRect;
    

    public void setShadowPaddingRect(RectF shadowPaddingRect) 
        mShadowPaddingRect = shadowPaddingRect;
    

    public  void setTranDurAnimTime(int defaultTranDurAnim) 
        mMoveAnimationHelper.setTranDurAnimTime(defaultTranDurAnim);
    

    public void setDrawUpRectEnabled(boolean isDrawUpRect) 
        mMoveAnimationHelper.setDrawUpRectEnabled(isDrawUpRect);
    

MoveAnimationHelperImplement，MoveAnimationHelper的实现者。

这是这个类里面最主要的方法setFocusView。

    @Override
    public void drawMoveView(Canvas canvas) 
        canvas.save();

        if (!isDrawUpRect) //飞框的绘制顺序，

            onDrawShadow(canvas);

            onDrawUpRect(canvas);
        
        // 绘制焦点子控件.
        if (mFocusView != null && (!isDrawUpRect && isDrawing)) 
            onDrawFocusView(canvas);
        
        //
        if (isDrawUpRect) //飞框的绘制顺序

            onDrawShadow(canvas);

            onDrawUpRect(canvas);
        
        canvas.restore();

    
  @Override
    public void setFocusView(View currentView, View oldView, float scale) 

        mFocusView = currentView;
        int getScale = (int) (scale * 10);
        if (getScale > 10) 
            if (currentView != null) 

                currentView.animate().scaleX(scale).scaleY(scale).setDuration(DEFAULT_TRAN_DUR_ANIM).start();
                if (oldView != null) 
                    oldView.animate().scaleX(DEFUALT_SCALE).scaleY(DEFUALT_SCALE).setDuration(DEFAULT_TRAN_DUR_ANIM).start();
                
            
        
        rectMoveAnimation(currentView, scale, scale);

    

    @Override
    public void rectMoveAnimation(View currentView, float scaleX, float scaleY) 
        Rect fromRect = findLocationWithView(getMoveView());
        Rect toRect = findLocationWithView(currentView);
        int disX = toRect.left - fromRect.left;
        int disY = toRect.top - fromRect.top;
        rectMoveMainLogic(currentView, disX, disY, scaleX, scaleY);
    

    private Rect findLocationWithView(View view) 
        ViewGroup root = (ViewGroup) getMoveView().getParent();
        Rect rect = new Rect();
        root.offsetDescendantRectToMyCoords(view, rect);
        return rect;
    

    private void rectMoveMainLogic(final View focusView, float x, float y, float scaleX, float scaleY) 
        int newWidth = 0;
        int newHeight = 0;
        int oldWidth = 0;
        int oldHeight = 0;
        if (focusView != null) 
            newWidth = (int) (focusView.getMeasuredWidth() * scaleX);
            newHeight = (int) (focusView.getMeasuredHeight() * scaleY);
            x = x + (focusView.getMeasuredWidth() - newWidth) / 2;
            y = y + (focusView.getMeasuredHeight() - newHeight) / 2;
        

        // 取消之前的动画.
        if (mCombineAnimatorSet != null)
            mCombineAnimatorSet.cancel();

        oldWidth = getMoveView().getMeasuredWidth();
        oldHeight = getMoveView().getMeasuredHeight();

        ObjectAnimator transAnimatorX = ObjectAnimator.ofFloat(getMoveView(), "translationX", x);
        ObjectAnimator transAnimatorY = ObjectAnimator.ofFloat(getMoveView(), "translationY", y);
        ObjectAnimator scaleXAnimator = ObjectAnimator.ofInt(new ScaleTool(getMoveView()), "width", oldWidth,
                (int) newWidth);
        ObjectAnimator scaleYAnimator = ObjectAnimator.ofInt(new ScaleTool(getMoveView()), "height", oldHeight,
                (int) newHeight);
        //
        AnimatorSet mAnimatorSet = new AnimatorSet();
        mAnimatorSet.playTogether(transAnimatorX, transAnimatorY, scaleXAnimator, scaleYAnimator);
        mAnimatorSet.setInterpolator(new DecelerateInterpolator(1));
        mAnimatorSet.setDuration(DEFAULT_TRAN_DUR_ANIM);
        getMoveView().setVisibility(View.VISIBLE);

        mAnimatorSet.addListener(new Animator.AnimatorListener() //动画的监听，主要用来设置移动飞框的绘制顺序
            @Override
            public void onAnimationStart(Animator animation) 
                if (!isDrawUpRect)
                    isDrawing = false;
            

            @Override
            public void onAnimationRepeat(Animator animation) 
                if (!isDrawUpRect)
                    isDrawing = false;
            

            @Override
            public void onAnimationEnd(Animator animation) 
                if (!isDrawUpRect)
                    isDrawing = true;
            

            @Override
            public void onAnimationCancel(Animator animation) 
                if (!isDrawUpRect)
                    isDrawing = false;
        );

        mAnimatorSet.start();
        mCombineAnimatorSet = mAnimatorSet;

    

下面是绘制边框和绘制阴影的方法，这次方法中可以动态的调节移动边框的大小，实现全包裹或者是类似于padding的效果。

    /**
     * 绘制最上层的移动边框.
     */
    public void onDrawUpRect(Canvas canvas) 
        Drawable drawableUp = getMoveView().getUpRectDrawable();
        if (drawableUp != null) 
            RectF paddingRect = getMoveView().getDrawUpRect();//从MoveView()中获取的，你可以自己在activity调节。
            int width = getMoveView().getWidth();
            int height = getMoveView().getHeight();
            Rect padding = new Rect();
            // 边框的绘制.
            drawableUp.getPadding(padding);
            drawableUp.setBounds((int) (-padding.left + (paddingRect.left)), (int) (-padding.top + (paddingRect.top)),
                    (int) (width + padding.right - (paddingRect.right)), (int) (height + padding.bottom - (paddingRect.bottom)));
            drawableUp.draw(canvas);
        
    
    /**
     * 绘制外部阴影.
     */
    public void onDrawShadow(Canvas canvas) 
        Drawable drawableShadow = getMoveView().getShadowDrawable();
        if (drawableShadow != null) 
            RectF shadowPaddingRect = getMoveView().getDrawShadowRect();//从MoveView()中获取的，你可以自己在activity调节。
            int width = getMoveView().getWidth();
            int height = getMoveView().getHeight();
            Rect padding = new Rect();
            drawableShadow.getPadding(padding);
            drawableShadow.setBounds((int) (-padding.left + (shadowPaddingRect.left)), (int) (-padding.top + (shadowPaddingRect.top)),
                    (int) (width + padding.right - (shadowPaddingRect.right)),
                    (int) (height + padding.bottom - (shadowPaddingRect.bottom)));
            drawableShadow.draw(canvas);
        
    

根部局所采用的方法是继承RelativeLayout

最上层的layout ，用来包裹我们所有的控件，这样，主要是为了放大的时候，控件不会被挡住

package com.shancancan.tvdemos.views;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.RelativeLayout;

/**
 *
 * Created by ShanCanCan on 2016/4/3 0003.
 */

public class MainRelativeLayout extends RelativeLayout 

    private int position;



    public MainRelativeLayout(Context context) 
        super(context);
        init(context);
    

    public MainRelativeLayout(Context context, AttributeSet attrs) 
        super(context, attrs);
        init(context);
    

    public MainRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) 
        super(context, attrs, defStyleAttr);
        init(context);
    



        private void init(Context context)
            setClipChildren(false); //是否现限制其他控件在它周围绘制选择false
            setClipToPadding(false); //是否限制控件区域在padding里面
            setChildrenDrawingOrderEnabled(true);//用于改变控件的绘制顺序

            getViewTreeObserver()
                    .addOnGlobalFocusChangeListener(new ViewTreeObserver.OnGlobalFocusChangeListener() 
                        @Override
                        public void onGlobalFocusChanged(View oldFocus, View newFocus) 
                            position = indexOfChild(newFocus);
                            if (position != -1) 
                                bringChildToFront(newFocus);
                                newFocus.postInvalidate();// 然后让控件重画，这样会好点。
                            
                        
                    );
        


    /**
     * 此函数 dispatchDraw 中调用.
     * 原理就是和最后一个要绘制的view，交换了位置.
     * 因为dispatchDraw最后一个绘制的view是在最上层的.
     * 这样就避免了使用 bringToFront 导致焦点错乱问题.
     */
    @Override
    protected int getChildDrawingOrder(int childCount, int i) 
        if (position != -1) 
            if (i == childCount - 1)
                return position;
            
            if (i == position)
                return childCount - 1;
        
        return i;
    

使用方法两步走：

一，布局文件

<?xml version="1.0" encoding="utf-8"?>
<com.shancancan.tvdemos.views.MainRelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_entry"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false"
    android:clipToPadding="false"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="@drawable/default_wallpaper"
    tools:context="com.shancancan.tvdemos.activities.EntryActivity">
<!--android:clipChildren="false"//是否现限制其他控件在它周围绘制选择false
    android:clipToPadding="false" //是否限制控件区域在padding里面
    根部局必须要加这两句话，其它父布局按需添加
    布局文件最下方介绍-->

    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:scaleType="fitXY"
        android:focusable="true"
        app:borderRadius="5dp"
        app:type="round"
        android:src="@drawable/beijing7"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="28dp"
        android:id="@+id/roundImageView3"/>

    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:borderRadius="5dp"
        app:type="round"
        android:focusable="true"
        android:scaleType="fitXY"
        android:src="@drawable/beijing5"
        android:layout_alignTop="@+id/roundImageView3"
        android:layout_alignStart="@+id/roundImageView4"
        android:id="@+id/roundImageView5"/>

    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="400dp"
        android:layout_height="200dp"
        app:borderRadius="5dp"
        app:type="round"
        android:focusable="true"
        android:scaleType="fitXY"
        android:src="@drawable/beijing3"
        android:id="@+id/roundImageView7"
        android:layout_alignTop="@+id/roundImageView5"
        android:layout_toEndOf="@+id/roundImageView5"
        android:layout_marginStart="117dp"/>


    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:borderRadius="15dp"
        app:type="round"
        android:focusable="true"
        android:scaleType="fitXY"
        android:src="@drawable/beijing1"
        android:id="@+id/roundImageView2"/>


    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:borderRadius="5dp"
        app:type="round"
        android:focusable="true"
        android:scaleType="fitXY"
        android:src="@drawable/beijing4"
        android:id="@+id/roundImageView6"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_marginEnd="128dp"/>

    <com.shancancan.tvdemos.views.RoundImageView
        android:layout_width="300dp"
        android:layout_height="100dp"
        android:scaleType="fitXY"
        android:src="@drawable/beijing6"
        app:borderRadius="5dp"
        app:type="round"
        android:focusable="true"
        android:id="@+id/roundImageView4"
        android:layout_alignBottom="@+id/roundImageView2"
        android:layout_toStartOf="@+id/roundImageView6"
        android:layout_marginEnd="34dp"/>
<!--MoveFrameLayout必须在根布局之上，而且不能被其他的控件位置上有引用-->
 <com.shancancan.tvdemos.views.MoveFrameLayout
        android:id="@+id/entrymove"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

    </com.shancancan.tvdemos.views.MoveFrameLayout>

<!--根布局用MainRelativeLayout-->
</com.shancancan.tvdemos.views.MainRelativeLayout>

二，activity处理

public class EntryActivity extends AppCompatActivity 
    private static final String TAG = "MainActivity";
    MainRelativeLayout mRelativeLayout;
    MoveFrameLayout mMoveView;
    View mOldFocus;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_entry);
        mRelativeLayout = (MainRelativeLayout) findViewById(R.id.activity_entry);
        mMoveView = (MoveFrameLayout) findViewById(R.id.entrymove);
        mMoveViewsetDetail();
        initRelativeLayout();
    
    private void mMoveViewsetDetail() 
        mMoveView.setUpRectResource(R.drawable.conner);//这里也可以设置shape或者是.9图片
        float density = getResources().getDisplayMetrics().density;//调整大小，如果你的边框大了就修改w_或者h_这两个参数
        RectF receF = new RectF(-getDimension(R.dimen.w_5) * density, -getDimension(R.dimen.h_5) * density,
                -getDimension(R.dimen.w_5) * density, -getDimension(R.dimen.h_5) * density);
        mMoveView.setUpPaddingRect(receF);//重新为mMoveView设置大小
        mMoveView.setTranDurAnimTime(400);
    
    public float getDimension(int id) 
        return getResources().getDimension(id);
    
    private void initRelativeLayout() //这是焦点的全局监听方法，与OnFocusChangeListener不同，这个方法长安不执行。

        mRelativeLayout.getViewTreeObserver().addOnGlobalFocusChangeListener(new ViewTreeObserver.OnGlobalFocusChangeListener() 
            @Override
            public void onGlobalFocusChanged(View oldFocus, View newFocus) 

                if (newFocus != null) 
                   // newFocus.bringToFront();
                    mMoveView.setDrawUpRectEnabled(true);//设置居于放大的view之上。
                    float scale = 1.1f;
                    mMoveView.setFocusView(newFocus, mOldFocus, scale);
                    mMoveView.bringToFront();//将mMoveView的位置bringToFront()
                    mOldFocus = newFocus;//自己将移动后的View进行保存，

                
            
        );
    

大功告成了，简单吧？你可以先下载体验一下，也可以关注我，后续提供更多示例，RecyclerView，带有指示器的ViewPager等等。

Demo尚未完成，先传百度云，点击即可下载与CSDN下载，完成后我会将其上传至Jcenter和github，大家直接compile就行了。