前言
本文主要分析 onTouch() 与 onTouchEvent() 事件的差异
正文
先看布局文件:
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| <?xml version="1.0" encoding="utf-8"?> <com.longzhiye.intercepttouch.MyFrameLayout xmlns: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" tools:context=".MainActivity"> <TextView android:id="@+id/tv" android:layout_width="200dp" android:layout_height="200dp" android:background="#000000" android:text="Hello World!" /> </com.longzhiye.intercepttouch.MyFrameLayout>
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MyFrameLayout 是一个自定义View:
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| public class MyFrameLayout extends FrameLayout { public MyFrameLayout(@NonNull Context context) { super(context); } public MyFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs) { super(context, attrs); } public MyFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override public boolean onInterceptTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: System.out.println("----onInterceptTouchEvent---ACTION_DOWN"); return true; case MotionEvent.ACTION_POINTER_UP: System.out.println("----onInterceptTouchEvent---ACTION_POINTER_UP"); break; case MotionEvent.ACTION_POINTER_DOWN: System.out.println("----onInterceptTouchEvent---ACTION_POINTER_DOWN"); break; case MotionEvent.ACTION_MOVE: System.out.println("----onInterceptTouchEvent---ACTION_MOVE"); break; case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: System.out.println("----onInterceptTouchEvent---ACTION_UP"); break; default: throw new IllegalStateException("Unexpected value: " + event.getActionMasked()); } return false; } }
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MainActivity:
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| public class MainActivity extends AppCompatActivity { TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView)findViewById(R.id.tv); textView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getActionMasked()) { case MotionEvent.ACTION_DOWN: System.out.println("----onTouch---ACTION_DOWN"); break; case MotionEvent.ACTION_POINTER_UP: System.out.println("----onTouch---ACTION_POINTER_UP"); break; case MotionEvent.ACTION_POINTER_DOWN: System.out.println("----onTouch---ACTION_POINTER_DOWN"); break; case MotionEvent.ACTION_MOVE: System.out.println("----onTouch---ACTION_MOVE"); break; case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: System.out.println("----onTouch---ACTION_UP"); break; default: throw new IllegalStateException("Unexpected value: " + motionEvent.getActionMasked()); } return true; } }); } }
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好了,开始进行分析:

当 onInterceptTouchEvent 事件返回 true,ViewGroup会将该事件进行拦截,无法向下(View)传递。在 onTouch 中将收不到事件。
当 onTouch 事件返回 true,则表明事件不再向下传递,自己处理,消耗掉,例子:该view的 onClick 事件将会失效。
ViewGroup事件传递总结

View事件传递总结

这里需要特别注意的是,onTouch()的执行 先于onClick()。
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http://longzhiye.top/2023/12/24/2023-12-24/