Android事件传递机制详解

总结

dispatchTouchEvent方法：分发点击事件
onInterceptTouchEvent方法：拦截事件(只存在于ViewGroup，View没有此方法)，在dispatchTouchEvent方法内部调用
onTouchEvent方法：处理点击事件，在dispatchTouchEvent方法内部调用

示例代码

自定义View-MyLinearLayout

public class MyLinearLayout extends LinearLayout {private static String TAG = "test";public MyLinearLayout(Context context) {this(context,null);}public MyLinearLayout(Context context, @Nullable AttributeSet attrs) {this(context, attrs, 0);}public MyLinearLayout(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initView(context);}private void initView(Context context) {}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "MyLinearLayout-dispatchTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "MyLinearLayout-dispatchTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "MyLinearLayout-dispatchTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "MyLinearLayout-dispatchTouchEvent-cancel");break;}return super.dispatchTouchEvent(event);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "MyLinearLayout-onInterceptTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "MyLinearLayout-onInterceptTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "MyLinearLayout-onInterceptTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "MyLinearLayout-onInterceptTouchEvent-cancel");break;}return super.onInterceptTouchEvent(event);}@Overridepublic boolean onTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "MyLinearLayout-onTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "MyLinearLayout-onTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "MyLinearLayout-onTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "MyLinearLayout-onTouchEvent-cancel");break;}return super.onTouchEvent(event);}
}

自定义View-MyButton

public class MyButton extends android.support.v7.widget.AppCompatButton {private static String TAG = "test";public MyButton(Context context) {this(context, null);}public MyButton(Context context, AttributeSet attrs) {this(context, attrs, 0);}public MyButton(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initView(context);}private void initView(Context context) {}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "MyButton-dispatchTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "MyButton-dispatchTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "MyButton-dispatchTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "MyButton-dispatchTouchEvent-cancel");break;}return super.dispatchTouchEvent(event);}@Overridepublic boolean onTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "MyButton-onTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "MyButton-onTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "MyButton-onTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "MyButton-onTouchEvent-cancel");break;}return super.onTouchEvent(event);}
}

MainActivity

public class TestActivity extends AppCompatActivity {private MyLinearLayout mLlRoot;private MyButton mBtn1;private static String TAG = "test";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_three);initView();}private void initView() {mLlRoot = (MyLinearLayout) findViewById(R.id.ll_root);mBtn1 = (MyButton) findViewById(R.id.btn1);}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "Activity-dispatchTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "Activity-dispatchTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "Activity-dispatchTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "threeActivity-dispatchTouchEvent-cancel");break;}return super.dispatchTouchEvent(event);}@Overridepublic boolean onTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:Log.d(TAG, "Activity-onTouchEvent-down");break;case MotionEvent.ACTION_MOVE:Log.d(TAG, "Activity-onTouchEvent-move");break;case MotionEvent.ACTION_UP:Log.d(TAG, "Activity-onTouchEvent-up");break;case MotionEvent.ACTION_CANCEL:Log.d(TAG, "Activity-onTouchEvent-cancel");break;}return super.onTouchEvent(event);}
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"><com.cn.liuyz.javademo.autoView.MyLinearLayoutandroid:id="@+id/ll_root"android:layout_width="match_parent"android:orientation="horizontal"android:background="#888"android:layout_height="500dp"><com.cn.liuyz.javademo.autoView.MyButtonandroid:id="@+id/btn1"android:text="你好"android:background="#f00"android:layout_width="200dp"android:layout_gravity="center"android:layout_height="200dp"/></com.cn.liuyz.javademo.autoView.MyLinearLayout></LinearLayout>

默认情况下事件传递

从Activity –> ViewGroup(MyLinearLayout) –> View(MyButton)，从上往下调用dispatchTouchEvent()

再由View(MyButton) –> ViewGroup(MyLinearLayout) –> Activity，从下往上调用onTouchEvent()

ViewGroup中

dispatchTouchEvent

dispatchTouchEvent返回super.dispatchTouchEvent(event)

调用dispatchTouchEvent方法内部的onInterceptTouchEvent方法

dispatchTouchEvent返回true

消费事件，事件不会往下传递
dispatchTouchEvent后续的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

dispatchTouchEvent返回false

不消费事件，事件停止传递
将事件向上传给父控件的onTouchEvent处理
dispatchTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

onInterceptTouchEvent

onInterceptTouchEvent返回super.onInterceptTouchEvent(event)

不拦截事件，事件继续往下传递
onInterceptTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行
同一个事件序列中同一个ViewGroup的onInterceptTouchEvent方法只会调用一次

onInterceptTouchEvent返回true

拦截事件，事件不会往下传递
传递给自己的onTouchEvent处理
onInterceptTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行

onInterceptTouchEvent返回false

不拦截事件，事件继续往下传递
onInterceptTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行
ViewGroup默认是不拦截的，所以super==false

onTouchEvent

onTouchEvent返回super.onTouchEvent(event)

不消费事件，事件继续往上传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

onTouchEvent返回true

处理事件，事件停止传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

onTouchEvent返回false

不处理事件，传递给父控件onTouchEvent处理
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

View中

dispatchTouchEvent

dispatchTouchEvent返回super.dispatchTouchEvent(event)

调用dispatchTouchEvent方法内部的onTouchEvent方法
是否消费事件取决于onTouchEvent的返回值

dispatchTouchEvent返回true

消费事件，事件不会往下传递
dispatchTouchEvent后续的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

dispatchTouchEvent返回false

不消费事件
将事件向上传给父控件的onTouchEvent处理
dispatchTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

onTouchEvent

onTouchEvent返回super.onTouchEvent(event)

不处理事件，事件继续往上传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行

onTouchEvent返回true

处理事件，事件停止传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

onTouchEvent返回false

不处理事件
将事件向上传给父控件的onTouchEvent处理
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)
View的默认实现是不处理事件。所以super.onTouchEvent(event)==false

注意

ViewGroup和View的dispatchTouchEvent和onTouchEvent方法 return false的时候事件都会向上传给父控件的onTouchEvent处理
ViewGroup的onInterceptTouchEvent 默认是不拦截的，所以return super.onInterceptTouchEvent()和return false一样
View的onTouchEvent默认是不处理事件。所以super.onTouchEvent(event)和false一样
ViewGroup要想把事件分发给自己的onTouchEvent，只有返回super.dispatchTouchEvent(event)，调用内部onInterceptTouchEvent方法并return true，才会调用自己的onTouchEvent方法。其他方法都不行
View要想把事件分发给自己的onTouchEvent，只有返回super.dispatchTouchEvent(event)，才会调用自己的onTouchEvent方法，其他方法都不行

示例结果分析

全是默认返回值，点击一下

11-14 16:06:18.787 29278-29278/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:06:18.788 29278-29278/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:06:18.788 29278-29278/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:06:18.788 29278-29278/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:06:18.788 29278-29278/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:06:18.788 29278-29278/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:06:18.791 29278-29278/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:06:18.844 29278-29278/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:06:18.844 29278-29278/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:06:18.861 29278-29278/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:06:18.861 29278-29278/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:06:18.944 29278-29278/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:06:18.944 29278-29278/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

默认情况下事件传递
从Activity –> ViewGroup(MyLinearLayout) –> View(MyButton)，从上往下调用dispatchTouchEvent()
再由View(MyButton) –> ViewGroup(MyLinearLayout) –> Activity，从下往上调用onTouchEvent()

注意
同一个事件序列中同一个ViewGroup的onInterceptTouchEvent方法只会调用一次

1、如果在MyLinearLayout的dispatchTouchEvent中返回true

11-14 16:30:44.311 32234-32234/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:30:44.312 32234-32234/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:30:44.351 32234-32234/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:30:44.351 32234-32234/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:30:44.368 32234-32234/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:30:44.368 32234-32234/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:30:44.384 32234-32234/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:30:44.384 32234-32234/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:30:44.441 32234-32234/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:30:44.441 32234-32234/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-up

消费事件，事件不会往下传递
dispatchTouchEvent的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

2、如果在MyLinearLayout的dispatchTouchEvent中返回false

11-14 16:32:42.088 32717-32717/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:32:42.089 32717-32717/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:32:42.092 32717-32717/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:32:42.136 32717-32717/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:32:42.136 32717-32717/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:32:42.152 32717-32717/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:32:42.152 32717-32717/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:32:42.169 32717-32717/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:32:42.169 32717-32717/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:32:42.201 32717-32717/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:32:42.201 32717-32717/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

不消费事件，事件停止传递
将事件向上传给父控件的onTouchEvent处理
dispatchTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

3、如果在MyLinearLayout的onInterceptTouchEvent中返回true

11-14 16:36:09.430 880-880/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:36:09.431 880-880/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:36:09.431 880-880/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:36:09.431 880-880/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:36:09.437 880-880/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:36:09.519 880-880/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:36:09.520 880-880/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:36:09.526 880-880/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:36:09.527 880-880/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:36:09.528 880-880/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:36:09.528 880-880/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

不拦截事件，事件继续往下传递
onInterceptTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行
同一个事件序列中同一个ViewGroup的onInterceptTouchEvent方法只会调用一次

4、如果在MyLinearLayout的onInterceptTouchEvent中返回true、onTouchEvent中返回true

11-14 16:41:08.186 1143-1143/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:41:08.188 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:41:08.188 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:41:08.189 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:41:08.259 1143-1143/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:41:08.259 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:41:08.259 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:41:08.276 1143-1143/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:41:08.276 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:41:08.276 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:41:08.292 1143-1143/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:41:08.292 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:41:08.293 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:41:08.343 1143-1143/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:41:08.343 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-up
11-14 16:41:08.343 1143-1143/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-up

不拦截事件，事件继续往下传递
onInterceptTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行
同一个事件序列中同一个ViewGroup的onInterceptTouchEvent方法只会调用一次

注意
ViewGroup 想把事件分发给自己的onTouchEvent，需要拦截器onInterceptTouchEvent方法return true 把事件拦截下来。

5、如果在MyLinearLayout的onInterceptTouchEvent中返回false

11-14 16:44:38.127 1534-1534/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:44:38.127 1534-1534/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:44:38.127 1534-1534/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:44:38.127 1534-1534/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:44:38.128 1534-1534/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:44:38.128 1534-1534/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:44:38.129 1534-1534/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:44:38.182 1534-1534/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:44:38.182 1534-1534/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:44:38.199 1534-1534/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:44:38.199 1534-1534/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:44:38.223 1534-1534/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:44:38.224 1534-1534/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

拦截事件，事件不会往下传递
传递给自己的onTouchEvent处理
onInterceptTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行

注意
ViewGroup的拦截器onInterceptTouchEvent 默认是不拦截的，所以return super.onInterceptTouchEvent()=return false

6、如果在MyLinearLayout的onTouchEvent中返回true

11-14 16:46:08.074 1884-1884/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:46:08.075 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:46:08.075 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:46:08.075 1884-1884/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:46:08.076 1884-1884/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:46:08.076 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:46:08.140 1884-1884/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:46:08.141 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:46:08.141 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:46:08.157 1884-1884/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:46:08.157 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:46:08.157 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:46:08.174 1884-1884/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:46:08.174 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:46:08.174 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-move
11-14 16:46:08.241 1884-1884/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:46:08.241 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-up
11-14 16:46:08.241 1884-1884/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-up

不消费事件，事件继续往上传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件会继续分发到该ViewGroup)

7、如果在MyLinearLayout的onTouchEvent中返回false

11-14 16:48:34.671 2190-2190/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:48:34.672 2190-2190/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:48:34.672 2190-2190/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:48:34.672 2190-2190/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:48:34.673 2190-2190/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:48:34.674 2190-2190/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:48:34.676 2190-2190/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:48:34.785 2190-2190/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:48:34.785 2190-2190/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:48:34.802 2190-2190/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:48:34.802 2190-2190/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:48:34.819 2190-2190/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:48:34.820 2190-2190/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:48:34.867 2190-2190/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:48:34.867 2190-2190/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

不处理事件，传递给父控件onTouchEvent处理
onTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)

8、如果在MyButton的dispatchTouchEvent中返回true

11-14 16:50:14.361 2408-2408/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:50:14.361 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:50:14.362 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:50:14.362 2408-2408/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:50:14.458 2408-2408/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:50:14.458 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:50:14.458 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-move
11-14 16:50:14.458 2408-2408/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-move
11-14 16:50:14.474 2408-2408/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:50:14.474 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:50:14.474 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-move
11-14 16:50:14.475 2408-2408/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-move
11-14 16:50:14.491 2408-2408/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:50:14.491 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:50:14.491 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-move
11-14 16:50:14.491 2408-2408/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-move
11-14 16:50:14.549 2408-2408/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:50:14.549 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-up
11-14 16:50:14.549 2408-2408/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-up
11-14 16:50:14.549 2408-2408/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-up

消费事件，事件不会往下传递
dispatchTouchEvent的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该View)

9、如果在MyButton的dispatchTouchEvent中返回false

11-14 16:53:13.553 2734-2734/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:53:13.554 2734-2734/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:53:13.555 2734-2734/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:53:13.555 2734-2734/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:53:13.555 2734-2734/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:53:13.558 2734-2734/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:53:13.726 2734-2734/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:53:13.726 2734-2734/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:53:13.733 2734-2734/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:53:13.733 2734-2734/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:53:13.734 2734-2734/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:53:13.734 2734-2734/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

不消费事件
将事件向上传给父控件的onTouchEvent处理
dispatchTouchEvent的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该View)

注意
View 没有拦截器，为了让View可以把事件分发给自己的onTouchEvent，View的dispatchTouchEvent默认实现（super）就是把事件分发给自己的onTouchEvent

10、如果在MyButton的onTouchEvent中返回true

11-14 16:55:08.718 2992-2992/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:55:08.718 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:55:08.720 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:55:08.720 2992-2992/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:55:08.720 2992-2992/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:55:08.807 2992-2992/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:55:08.807 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:55:08.807 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-move
11-14 16:55:08.807 2992-2992/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-move
11-14 16:55:08.807 2992-2992/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-move
11-14 16:55:08.823 2992-2992/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:55:08.823 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-move
11-14 16:55:08.823 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-move
11-14 16:55:08.823 2992-2992/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-move
11-14 16:55:08.824 2992-2992/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-move
11-14 16:55:08.867 2992-2992/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:55:08.867 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-up
11-14 16:55:08.867 2992-2992/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-up
11-14 16:55:08.867 2992-2992/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-up
11-14 16:55:08.867 2992-2992/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-up

处理事件，事件停止传递
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件继续执行(后续事件会继续分发到该ViewGroup)

11、如果在MyButton的onTouchEvent中返回false

11-14 16:56:37.628 3205-3205/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-down
11-14 16:56:37.628 3205-3205/com.cn.liuyz.javademo D/test: MyLinearLayout-dispatchTouchEvent-down
11-14 16:56:37.628 3205-3205/com.cn.liuyz.javademo D/test: MyLinearLayout-onInterceptTouchEvent-down
11-14 16:56:37.629 3205-3205/com.cn.liuyz.javademo D/test: MyButton-dispatchTouchEvent-down
11-14 16:56:37.629 3205-3205/com.cn.liuyz.javademo D/test: MyButton-onTouchEvent-down
11-14 16:56:37.629 3205-3205/com.cn.liuyz.javademo D/test: MyLinearLayout-onTouchEvent-down
11-14 16:56:37.631 3205-3205/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-down
11-14 16:56:37.718 3205-3205/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:56:37.718 3205-3205/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:56:37.735 3205-3205/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-move
11-14 16:56:37.735 3205-3205/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-move
11-14 16:56:37.784 3205-3205/com.cn.liuyz.javademo D/test: Activity-dispatchTouchEvent-up
11-14 16:56:37.784 3205-3205/com.cn.liuyz.javademo D/test: Activity-onTouchEvent-up

不处理事件
将事件向上传给父控件的onTouchEvent处理
onTouchEvent后续的ACTION_MOVE、ACTION_UP事件不再执行(后续事件将不会分发给该ViewGroup)
View的默认实现是不消费的。所以super==false

onTouch和onTouchEvent区别和使用

这两个方法都是在View的dispatchTouchEvent中调用，onTouch优先于onTouchEvent执行。如果在onTouch方法中通过返回true将事件消费掉，onTouchEvent将不会执行。

onTouch能执行需要两个条件，第一mOnTouchListener值不能为空，第二当前点击的控件必须是enable。因此如果控件是非enable的，那么给它注册onTouch事件将永远得不到执行。对于这一类控件，如果我们想要监听它的touch事件，就必须通过在该控件中重写onTouchEvent方法来实现。