简书链接:android触摸事件和点击事件
文章字数：101,阅读全文大约需要1分钟
优先级->dispatchTouchEvent>setOnTouchListener>onTouch() >onCLick

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public boolean dispatchTouchEvent(MotionEvent event) {
    // If the event should be handled by accessibility focus first.
    if (event.isTargetAccessibilityFocus()) {
        // We don't have focus or no virtual descendant has it, do not handle the event.
        if (!isAccessibilityFocusedViewOrHost()) {
            return false;
        }
        // We have focus and got the event, then use normal event dispatch.
        event.setTargetAccessibilityFocus(false);
    }

    boolean result = false;

    if (mInputEventConsistencyVerifier != null) {
        mInputEventConsistencyVerifier.onTouchEvent(event, 0);
    }

    final int actionMasked = event.getActionMasked();
    if (actionMasked == MotionEvent.ACTION_DOWN) {
        // Defensive cleanup for new gesture
        stopNestedScroll();
    }

    if (onFilterTouchEventForSecurity(event)) {
        if ((mViewFlags & ENABLED_MASK) == ENABLED && handleScrollBarDragging(event)) {
            result = true;
        }
        //noinspection SimplifiableIfStatement
        ListenerInfo li = mListenerInfo;
        if (li != null && li.mOnTouchListener != null
                && (mViewFlags & ENABLED_MASK) == ENABLED
                && li.mOnTouchListener.onTouch(this, event)) {
            result = true;
        }

        if (!result && onTouchEvent(event)) {
            result = true;
        }
    }

如果触摸事件返回true就不会执行onTouchEvent
那么点击事件是通过onTouchEvent进行分发的,

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public boolean onTouchEvent(MotionEvent event) {
       final float x = event.getX();
       final float y = event.getY();
       final int viewFlags = mViewFlags;
       final int action = event.getAction();

       final boolean clickable = ((viewFlags & CLICKABLE) == CLICKABLE
               || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)
               || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE;

       if ((viewFlags & ENABLED_MASK) == DISABLED) {
           if (action == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) {
               setPressed(false);
           }
           mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;
           // A disabled view that is clickable still consumes the touch
           // events, it just doesn't respond to them.
           return clickable;
       }
       if (mTouchDelegate != null) {
           if (mTouchDelegate.onTouchEvent(event)) {
               return true;
           }
       }

       if (clickable || (viewFlags & TOOLTIP) == TOOLTIP) {
           switch (action) {
               case MotionEvent.ACTION_UP:
                   mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;
                   if ((viewFlags & TOOLTIP) == TOOLTIP) {
                       handleTooltipUp();
                   }
                   if (!clickable) {
                       removeTapCallback();
                       removeLongPressCallback();
                       mInContextButtonPress = false;
            
                       break;
                   }
                   boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0;
                   if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) {
            
                       boolean focusTaken = false;
                       if (isFocusable() && isFocusableInTouchMode() && !isFocused()) {
                           focusTaken = requestFocus();
                       }

                       if (prepressed) {
               
                           setPressed(true, x, y);
                       }

                       if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) {
                       
                           removeLongPressCallback();

                           if (!focusTaken) {
                
                               if (mPerformClick == null) {
                                   mPerformClick = new PerformClick();
                               }
                               if (!post(mPerformClick)) {
                                   performClick();
                               }
                           }
                       }

                /**省略代码**/
               case MotionEvent.ACTION_DOWN:
                   if (event.getSource() == InputDevice.SOURCE_TOUCHSCREEN) {
                       mPrivateFlags3 |= PFLAG3_FINGER_DOWN;
                   }
                /**省略代码**/

               case MotionEvent.ACTION_MOVE:
                   if (clickable) {
                       drawableHotspotChanged(x, y);
                   }

                   // Be lenient about moving outside of buttons
                   if (!pointInView(x, y, mTouchSlop)) {
                       // Outside button
                       // Remove any future long press/tap checks
                       removeTapCallback();
                       removeLongPressCallback();
                       if ((mPrivateFlags & PFLAG_PRESSED) != 0) {
                           setPressed(false);
                       }
                       mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;
                   }
                   break;
           }

           return true;
       }

       return false;
   }

所以要让点击事件还返回true,那么onTouch里面要返回true,