Activity的dispatchTouchEvent调用堆栈

Posted mohoward

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 Activity.java的 dispatchTouchEvent
 java.lang.Exception
      at android.app.Activity.dispatchTouchEvent(Activity.java:4122)
      at com.cultraview.whiteboard.view.MainWbActivity.dispatchTouchEvent(MainWbActivity.kt:721)
      at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:446)
      at android.view.View.dispatchPointerEvent(View.java:14568)
      at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6022)
      at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5825)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5316)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5491)
      at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
      at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5548)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
      at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8086)
      at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8037)
      at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7998)
      at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8209)
      at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:221)
      at android.os.MessageQueue.nativePollOnce(Native Method)
      at android.os.MessageQueue.next(MessageQueue.java:335)
      at android.os.Looper.loop(Looper.java:183)
      at android.app.ActivityThread.main(ActivityThread.java:7664)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:952)

InputEventReceiver.java的 finishInputEvent
 java.lang.Exception
      at android.view.InputEventReceiver.finishInputEvent(InputEventReceiver.java:167)
      at android.view.ViewRootImpl.finishInputEvent(ViewRootImpl.java:8115)
      at android.view.ViewRootImpl.access$1900(ViewRootImpl.java:194)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5375)
      at android.view.ViewRootImpl$SyntheticInputStage.onDeliverToNext(ViewRootImpl.java:6201)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5309)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
      at android.view.ViewRootImpl$ViewPostImeInputStage.onDeliverToNext(ViewRootImpl.java:5843)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$InputStage.finish(ViewRootImpl.java:5332)
      at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5349)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5491)
      at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
      at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5548)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
      at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
      at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
      at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
      at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
      at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8086)
      at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8037)
      at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7998)
      at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8209)
      at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:221)
      at android.os.MessageQueue.nativePollOnce(Native Method)
      at android.os.MessageQueue.next(MessageQueue.java:335)
      at android.os.Looper.loop(Looper.java:183)
      at android.app.ActivityThread.main(ActivityThread.java:7664)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:952)

仿微信滑动退出Activity

原文链接：http://blog.csdn.net/u013045971/article/details/53900820

效果图：



原理：

        原理一句话就能描述清楚。重写Activity的dispatchTouchEvent，滑动的时候拿到Activity栈中栈顶Activity的上一个Acticity的ContentView添加到栈顶Activity的DecorView中，滑动的过程中做视图平移，滑动结束之后把前面拿过来用的ContentView归还给上一个Activity，然后finish当前Activity。

ActivityStack：

        实现 Application.ActivityLifecycleCallbacks 接口，在App的Application中注册这个栈，当App中的Activity新增或者删除时会回调接口中的方法。

public class ActivityBackStack implements Application.ActivityLifecycleCallbacks 

    private Stack<Activity> mActivityStack;

    public ActivityBackStack() 
        mActivityStack = new Stack<>();
    

    @Override
    public void onActivityCreated(Activity activity, Bundle savedInstanceState) 
        mActivityStack.add(activity);
    

    @Override
    public void onActivityStarted(Activity activity) 

    

    @Override
    public void onActivityResumed(Activity activity) 

    

    @Override
    public void onActivityPaused(Activity activity) 

    

    @Override
    public void onActivityStopped(Activity activity) 

    

    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle outState) 

    

    @Override
    public void onActivityDestroyed(Activity activity) 
        if (activity != null) 
            mActivityStack.remove(activity);
        
    

    /**
     * 获取栈顶的Activity
     *
     * @return
     */
    public Activity getLastActivity() 
        return mActivityStack.lastElement();
    

    /**
     * 获取倒数第二个Activity
     *
     * @return
     */
    public Activity getPreActivty() 
        int size = mActivityStack.size();
        if (size < 2) 
            return null;
        
        return mActivityStack.get(size - 2);
    

    public int getSize() 
        return mActivityStack.size();
然后在Application中注册这个实现类 

registerActivityLifecycleCallbacks(mBackStack);

DecorView：

        1.DecorView 为整个Window界面的最顶层View

        2.DecorView只有一个子View LinearLayout，代表整个Window界面，包括ton通知栏，标题栏，和内容区域。

        3.获取DecorView:activity.getWindow().getDecorView()

滑动：

        重写Activity的dispatchTouchEvent，设定一个阀值，在阀值内出发时拿到上一个Activity的ContentView添加到当前的DecorView中，index为0，置于最低定。滑动的过程中动态改变容器的X值，让其做出平移效果，松开手之后做取消或者关闭动画。动画结束后把前面拿到的ContentView归还。

DEMO：

        https://github.com/gumingwei/SwipeBackActivity

原文链接：

        原文链接：http://blog.csdn.net/u013045971/article/details/53900820

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