view的事件分发机制实践

public class  extends LinearLayout {
    private static final String TAG = "CustomView";
    public (Context context) {
        super(context);
    }
    public (Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public (Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        boolean intercepted = false;
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG, "CustomViewOne onInterceptTouchEvent: ACTION_DOWN");
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d(TAG, "CustomViewOne onInterceptTouchEvent: ACTION_MOVE");
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "CustomViewOne onInterceptTouchEvent: ACTION_UP");
                break;
        }
        return intercepted;
    }
    
    public boolean onTouchEvent(MotionEvent event) {
        boolean intercepted = false;
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG, "CustomViewOne onTouchEvent: ACTION_DOWN");
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d(TAG, "CustomViewOne onTouchEvent: ACTION_MOVE");
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "CustomViewOne onTouchEvent: ACTION_UP");
                break;
        }
        return intercepted;
    }
}

public class CustomViewTwo extends LinearLayout {
    private static final String TAG = "CustomView";
    public CustomViewTwo(Context context) {
        super(context);
    }
    public CustomViewTwo(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public CustomViewTwo(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        boolean intercepted = false;
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG, "CustomViewTwo onInterceptTouchEvent: ACTION_DOWN");
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d(TAG, "CustomViewTwo onInterceptTouchEvent: ACTION_MOVE");
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "CustomViewTwo onInterceptTouchEvent: ACTION_UP");
                break;
        }
        return intercepted;
    }
    
    public boolean onTouchEvent(MotionEvent event) {
        boolean intercepted = false;
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG, "CustomViewTwo onTouchEvent: ACTION_DOWN");
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d(TAG, "CustomViewTwo onTouchEvent: ACTION_MOVE");
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "CustomViewTwo onTouchEvent: ACTION_UP");
                break;
        }
        return intercepted;
    }
}

public class CustomViewThree extends View {
    private static final String TAG = "CustomView";
    public CustomViewThree(Context context) {
        super(context);
    }
    public CustomViewThree(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public CustomViewThree(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    
    public boolean onTouchEvent(MotionEvent event) {
        boolean intercepted = false;
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG, "CustomViewThree onTouchEvent: ACTION_DOWN");
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d(TAG, "CustomViewThree onTouchEvent: ACTION_MOVE");
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "CustomViewThree onTouchEvent: ACTION_UP");
                break;
        }
        return intercepted;
    }
}