独立组件之间重叠放置时，OnTouch事件的响应顺序

结论：OnTouch由上到下依次响应。上层指排在后面的View，既在UI界面显示在上层的View。如果上层控件return true，消费掉事件，下层组件不在响应OnTouch事件。注意：OnTouch事件只能由子控件向父控件传递。测试布局文件

<FrameLayout
android:id="@+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="200dip"
android:layout_centerHorizontal="true"
android:background="@color/material_blue_grey_900"
android:layout_alignParentBottom="true">

<ImageView
android:id="@+id/imageView"
android:text="@string/hello_world" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_gravity="center"
android:src="@drawable/ic_launcher"/>

<TextView
android:id="@+id/textView"
android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:layout_gravity="center" />

</FrameLayout>

测试代码一：

imageView -> return false;

textView -> return false;

即：imageView 和 textView 的OnTouch事件都返回false。

textView = (TextView)findViewById(R.id.textView);

imageView = (ImageView)findViewById(R.id.imageView);

imageView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.e("--", "onTouch-----------imageView");
return false;
}
});

textView.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.e("--", "onTouch-----------textView");return false;}});结果一：09-15 20:23:12.134  28895-28895/com.example.langjian.myapplication E/--﹕ onTouch-----------textView09-15 20:23:12.134  28895-28895/com.example.langjian.myapplication E/--﹕ onTouch-----------imageView测试代码二：

imageView -> return false;

textView -> return true;

textView = (TextView)findViewById(R.id.textView);

imageView = (ImageView)findViewById(R.id.imageView);imageView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.e("--", "onTouch-----------imageView");
return false;
}
});

textView.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.e("--", "onTouch-----------textView");return true;}});

结果二：09-15 20:25:13.844  30500-30500/com.example.langjian.myapplication E/--﹕ onTouch-----------textView09-15 20:25:13.864  30500-30500/com.example.langjian.myapplication E/--﹕ onTouch-----------textView测试代码三：

imageView -> return true;

textView -> return false;

textView = (TextView)findViewById(R.id.textView);

imageView = (ImageView)findViewById(R.id.imageView);imageView.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.e("--", "onTouch-----------imageView");return true;}});

textView.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.e("--", "onTouch-----------textView");return false;}});

结果三：09-15 20:39:25.022  31824-31824/com.example.langjian.myapplication E/--﹕ onTouch-----------textView09-15 20:39:25.022  31824-31824/com.example.langjian.myapplication E/--﹕ onTouch-----------imageView测试代码四：

imageView -> return true;

textView -> return true;

结果四：同结果2