1. 屏幕点击事件
| 事件 | 简介 |
|---|---|
| ACTION_DOWN | 手指 初次接触到屏幕 时触发。 |
| ACTION_MOVE | 手指 在屏幕上滑动 时触发，会多次触发。 |
| ACTION_UP | 手指 离开屏幕 时触发。 |
| ACTION_CANCEL | 事件 被上层拦截 时触发。 |
安卓中输入事件主要分为KeyEvent（键盘）和MotionEvent（触摸屏）两种，其中 KeyEvent是指键盘输入事件，本文主要讲 MotionEvent。
正常情况下，无论你手指在屏幕做多少操作，最终呈现在MotionEvent上来讲无外乎下面两种：
1.点击后抬起，也就是单击操作：ACTION_DOWN -> ACTION_UP
2.点击后再风骚的滑动一段距离，再抬起：ACTION_DOWN -> ACTION_MOVE -> ... -> ACTION_MOVE -> ACTION_UP
2. 事件分发的整体流程
Android输入事件的源头是位于/dev/input/下的设备节点，而输入事件的终点是由WMS管理的某个窗口，最终由窗口中的View处理。最初的输入事件为内核生成的原始事件，而最终交付给窗口的则是KeyEvent（键盘）或MotionEvent（鼠标和触摸屏）对象。输入事件由Native层进入到Java层的第一个函数是InputEventReceiver.dispatchInputEvent(），这样我们的手指触摸事件（MotionEvent）就传递到Java层，到应用层的传递过程遵循如下顺序：Activity->Window->View;即View事件最先传递给Activity，然后由Activity传递给Window，最后由Window传递给View；顶级View（DecorView）接收到事件后，就会按照事件分发机制去分发事件。本文章主要讲解Java层的事件分发。
3. 事件分发的 3 个重要方法
-
dispatchTouchEvent：用于分发传递事件，只要事件能够传递到当前View，这个方法就会被调用。
public boolean dispatchTouchEvent(MotionEvent event)
它就是事件分发的重要方法，如果一个MotionEvent传递给了View，那么dispatchTouchEvent方法一定会被调用！
返回值：表示是否消费了当前事件。可能是View本身的onTouchEvent方法消费，也可能是子View的dispatchTouchEvent方法中消费。返回true表示事件被消费，本次的事件终止。
返回false表示View以及子View均没有消费事件，将调用父View的onTouchEvent方法
查看具体的代码理解：
public boolean dispatchTouchEvent(MotionEvent ev) {
boolean result = false; // 默认状态为没有消费过
if (!onInterceptTouchEvent(ev)) { // 如果没有拦截交给子View
result = child.dispatchTouchEvent(ev);
}
if (!result) { // 如果事件没有被消费,询问自身onTouchEvent
result = onTouchEvent(ev);
}
return result;
}
- onInterceptTouchEvent：用于判断是否拦截事件，不往下传递。（此方法只有ViewGroup拥有，Activity和View没有）此方法在dispatchTouchEvent方法中调用。
public boolean onInterceptTouchEvent(MotionEvent ev)
事件拦截，当一个ViewGroup在接到MotionEvent事件序列时候，首先会调用此方法判断是否需要拦截。特别注意，这是ViewGroup特有的方法，View并没有拦截方法
返回值：是否拦截事件传递，返回true表示拦截了事件，那么事件将不再向下分发而是调用View本身的onTouchEvent方法。返回false表示不做拦截，事件将向下分发到子View的dispatchTouchEvent方法。
- onTouchEvent:用于处理事件，同样也是在dispatchTouchEvent方法中调用。
public boolean onTouchEvent(MotionEvent ev)
真正对MotionEvent进行处理或者说消费的方法。在dispatchTouchEvent进行调用。
返回值：返回true表示事件被消费，本次的事件终止。返回false表示事件没有被消费，将调用父View的onTouchEvent方法
Activity、ViewGroup、View事件分发有否：
√表示有该方法。
X表示没有该方法。
| 类型 | 相关方法 | Activity | ViewGroup | View |
|---|---|---|---|---|
| 事件分发 | dispatchTouchEvent | √ | √ | √ |
| 事件拦截 | onInterceptTouchEvent | X | √ | X |
| 事件消费 | onTouchEvent | √ | √ | √ |
这个三个方法均有一个 boolean(布尔) 类型的返回值，通过返回 true 和 false 来控制事件传递的流程。
PS: 从上表可以看到 Activity 和 View 都是没有事件拦截的，这是因为：
Activity 作为原始的事件分发者，如果 Activity 拦截了事件会导致整个屏幕都无法响应事件，这肯定不是我们想要的效果。
View最为事件传递的最末端，要么消费掉事件，要么不处理进行回传，根本没必要进行事件拦截。
4. 事件分发源码流程
View的结构：
在如上图View的树形结构中，事件发生时，最先由Activity接收，然后再一层层的向下层传递，直到找到合适的处理控件。大致如下：
但是如果事件传递到最后的View还是没有找到合适的View消费事件，那么事件就会向相反的方向传递，最终传递给Activity，如果最后 Activity 也没有处理，本次事件才会被抛弃:
通过下面的流程图，会更加清晰的帮助我们梳理事件分发机制
View结构图
View事件分发流程图
可以看出事件的传递过程都是从父View到子View。
一个更具体的例子：
1. 当手指在 View1 区域点击了一下之后，如果所有View都不消耗事件，你就能看到一个完整的事件分发流程，大致如下：
红色箭头方向表示事件分发方向。
绿色箭头方向表示事件回传方向。
2. 点击 View1 区域且事件被 View1 消费
如果事件被View1消费掉了则事件会回传告诉上层View这个事件已经被我解决了，上层View就无需再响应了。
参考：安卓自定义View进阶-事件分发机制原理 - 天涯海角路 - 博客园
- frameworks/base/core/java/android/app/Activity.java
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
onUserInteraction();
}
if (getWindow().superDispatchTouchEvent(ev)) {
return true;
}
return onTouchEvent(ev);
}
public Window getWindow() {
return mWindow;
}- frameworks/base/core/java/com/android/internal/policy/PhoneWindow.java
private DecorView mDecor;
@Override
public boolean superDispatchTouchEvent(MotionEvent event) {
return mDecor.superDispatchTouchEvent(event);
}- frameworks/base/core/java/com/android/internal/policy/DecorView.java
/** @hide */
public class DecorView extends FrameLayout implements RootViewSurfaceTaker, WindowCallbacks {
private static final String TAG = "DecorView";
public boolean superDispatchTouchEvent(MotionEvent event) {
// 调用父类的方法
return super.dispatchTouchEvent(event);
}- frameworks/base/core/java/android/widget/FrameLayout.java
public class FrameLayout extends ViewGroup {
private static final int DEFAULT_CHILD_GRAVITY = Gravity.TOP | Gravity.START;FrameLayout 没有dispatchTouchEvent，继续往上调用父类方法
- frameworks/base/core/java/android/view/ViewGroup.java
public abstract class ViewGroup extends View implements ViewParent, ViewManager {
private static final String TAG = "ViewGroup";
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (mInputEventConsistencyVerifier != null) {
mInputEventConsistencyVerifier.onTouchEvent(ev, 1);
}
// If the event targets the accessibility focused view and this is it, start
// normal event dispatch. Maybe a descendant is what will handle the click.
if (ev.isTargetAccessibilityFocus() && isAccessibilityFocusedViewOrHost()) {
ev.setTargetAccessibilityFocus(false);
}
boolean handled = false;
if (onFilterTouchEventForSecurity(ev)) {
final int action = ev.getAction();
final int actionMasked = action & MotionEvent.ACTION_MASK;
// Handle an initial down.
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Throw away all previous state when starting a new touch gesture.
// The framework may have dropped the up or cancel event for the previous gesture
// due to an app switch, ANR, or some other state change.
cancelAndClearTouchTargets(ev);
resetTouchState();
}
// Check for interception.
final boolean intercepted;
if (actionMasked == MotionEvent.ACTION_DOWN
|| mFirstTouchTarget != null) {
final boolean disallowIntercept = (mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0;
if (!disallowIntercept) {
intercepted = onInterceptTouchEvent(ev);
ev.setAction(action); // restore action in case it was changed
} else {
intercepted = false;
}
} else {
// There are no touch targets and this action is not an initial down
// so this view group continues to intercept touches.
intercepted = true;
}
// If intercepted, start normal event dispatch. Also if there is already
// a view that is handling the gesture, do normal event dispatch.
if (intercepted || mFirstTouchTarget != null) {
ev.setTargetAccessibilityFocus(false);
}
// Check for cancelation.
final boolean canceled = resetCancelNextUpFlag(this)
|| actionMasked == MotionEvent.ACTION_CANCEL;
// Update list of touch targets for pointer down, if needed.
final boolean isMouseEvent = ev.getSource() == InputDevice.SOURCE_MOUSE;
final boolean split = (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) != 0
&& !isMouseEvent;
TouchTarget newTouchTarget = null;
boolean alreadyDispatchedToNewTouchTarget = false;
if (!canceled && !intercepted) {
// If the event is targeting accessibility focus we give it to the
// view that has accessibility focus and if it does not handle it
// we clear the flag and dispatch the event to all children as usual.
// We are looking up the accessibility focused host to avoid keeping
// state since these events are very rare.
View childWithAccessibilityFocus = ev.isTargetAccessibilityFocus()
? findChildWithAccessibilityFocus() : null;
if (actionMasked == MotionEvent.ACTION_DOWN
|| (split && actionMasked == MotionEvent.ACTION_POINTER_DOWN)
|| actionMasked == MotionEvent.ACTION_HOVER_MOVE) {
final int actionIndex = ev.getActionIndex(); // always 0 for down
final int idBitsToAssign = split ? 1 << ev.getPointerId(actionIndex)
: TouchTarget.ALL_POINTER_IDS;
// Clean up earlier touch targets for this pointer id in case they
// have become out of sync.
removePointersFromTouchTargets(idBitsToAssign);
final int childrenCount = mChildrenCount;
if (newTouchTarget == null && childrenCount != 0) {
final float x =
isMouseEvent ? ev.getXCursorPosition() : ev.getX(actionIndex);
final float y =
isMouseEvent ? ev.getYCursorPosition() : ev.getY(actionIndex);
// Find a child that can receive the event.
// Scan children from front to back.
final ArrayList<View> preorderedList = buildTouchDispatchChildList();
final boolean customOrder = preorderedList == null
&& isChildrenDrawingOrderEnabled();
final View[] children = mChildren;
for (int i = childrenCount - 1; i >= 0; i--) {
final int childIndex = getAndVerifyPreorderedIndex(
childrenCount, i, customOrder);
final View child = getAndVerifyPreorderedView(
preorderedList, children, childIndex);
// If there is a view that has accessibility focus we want it
// to get the event first and if not handled we will perform a
// normal dispatch. We may do a double iteration but this is
// safer given the timeframe.
if (childWithAccessibilityFocus != null) {
if (childWithAccessibilityFocus != child) {
continue;
}
childWithAccessibilityFocus = null;
i = childrenCount - 1;
}
if (!child.canReceivePointerEvents()
|| !isTransformedTouchPointInView(x, y, child, null)) {
ev.setTargetAccessibilityFocus(false);
continue;
}
newTouchTarget = getTouchTarget(child);
if (newTouchTarget != null) {
// Child is already receiving touch within its bounds.
// Give it the new pointer in addition to the ones it is handling.
newTouchTarget.pointerIdBits |= idBitsToAssign;
break;
}
resetCancelNextUpFlag(child);
if (dispatchTransformedTouchEvent(ev, false, child, idBitsToAssign)) {
// Child wants to receive touch within its bounds.
mLastTouchDownTime = ev.getDownTime();
if (preorderedList != null) {
// childIndex points into presorted list, find original index
for (int j = 0; j < childrenCount; j++) {
if (children[childIndex] == mChildren[j]) {
mLastTouchDownIndex = j;
break;
}
}
} else {
mLastTouchDownIndex = childIndex;
}
mLastTouchDownX = ev.getX();
mLastTouchDownY = ev.getY();
newTouchTarget = addTouchTarget(child, idBitsToAssign);
alreadyDispatchedToNewTouchTarget = true;
break;
}
// The accessibility focus didn't handle the event, so clear
// the flag and do a normal dispatch to all children.
ev.setTargetAccessibilityFocus(false);
}
if (preorderedList != null) preorderedList.clear();
}
if (newTouchTarget == null && mFirstTouchTarget != null) {
// Did not find a child to receive the event.
// Assign the pointer to the least recently added target.
newTouchTarget = mFirstTouchTarget;
while (newTouchTarget.next != null) {
newTouchTarget = newTouchTarget.next;
}
newTouchTarget.pointerIdBits |= idBitsToAssign;
}
}
}
// Dispatch to touch targets.
if (mFirstTouchTarget == null) {
// No touch targets so treat this as an ordinary view.
handled = dispatchTransformedTouchEvent(ev, canceled, null,
TouchTarget.ALL_POINTER_IDS);
} else {
// Dispatch to touch targets, excluding the new touch target if we already
// dispatched to it. Cancel touch targets if necessary.
TouchTarget predecessor = null;
TouchTarget target = mFirstTouchTarget;
while (target != null) {
final TouchTarget next = target.next;
if (alreadyDispatchedToNewTouchTarget && target == newTouchTarget) {
handled = true;
} else {
final boolean cancelChild = resetCancelNextUpFlag(target.child)
|| intercepted;
if (dispatchTransformedTouchEvent(ev, cancelChild,
target.child, target.pointerIdBits)) {
handled = true;
}
if (cancelChild) {
if (predecessor == null) {
mFirstTouchTarget = next;
} else {
predecessor.next = next;
}
target.recycle();
target = next;
continue;
}
}
predecessor = target;
target = next;
}
}
// Update list of touch targets for pointer up or cancel, if needed.
if (canceled
|| actionMasked == MotionEvent.ACTION_UP
|| actionMasked == MotionEvent.ACTION_HOVER_MOVE) {
resetTouchState();
} else if (split && actionMasked == MotionEvent.ACTION_POINTER_UP) {
final int actionIndex = ev.getActionIndex();
final int idBitsToRemove = 1 << ev.getPointerId(actionIndex);
removePointersFromTouchTargets(idBitsToRemove);
}
}
if (!handled && mInputEventConsistencyVerifier != null) {
mInputEventConsistencyVerifier.onUnhandledEvent(ev, 1);
}
return handled;
}- frameworks/base/core/java/android/view/View.java
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);
}
// 按下屏幕时actioin = ACTION_DOWN，此时会调用stopNestedScroll清除滚动效果
final int actionMasked = event.getActionMasked();
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Defensive cleanup for new gesture
stopNestedScroll();
}
// 如果窗口没有被遮盖
if (onFilterTouchEventForSecurity(event)) {
if ((mViewFlags & ENABLED_MASK) == ENABLED && handleScrollBarDragging(event)) {
result = true;
}
//当中的li.mOnTouchListener.onTouch(this, event)条件,自定义view中的监听
//noinspection SimplifiableIfStatement
ListenerInfo li = mListenerInfo;
if (li != null && li.mOnTouchListener != null
&& (mViewFlags & ENABLED_MASK) == ENABLED
&& li.mOnTouchListener.onTouch(this, event)) {
result = true;
}
// 如果没有调用监听，则调用 onTouchEvent方法
if (!result && onTouchEvent(event)) {
result = true;
}
}
if (!result && mInputEventConsistencyVerifier != null) {
mInputEventConsistencyVerifier.onUnhandledEvent(event, 0);
}
// Clean up after nested scrolls if this is the end of a gesture;
// also cancel it if we tried an ACTION_DOWN but we didn't want the rest
// of the gesture.
if (actionMasked == MotionEvent.ACTION_UP ||
actionMasked == MotionEvent.ACTION_CANCEL ||
(actionMasked == MotionEvent.ACTION_DOWN && !result)) {
stopNestedScroll();
}
return result;
}
View在调用dispatchTouchEvent处理事件时首先会判断View是否设置了OnTouchListener，如果View设置了OnTouchListener则会调用OnTouchListener中的onTouch处理事件；如果没有设置OnTouchListener则会调用View的onTouchEvent处理事件
public boolean onTouchEvent(MotionEvent event) {
final float x = event.getX();
final float y = event.getY();
final int viewFlags = mViewFlags;
final int action = event.getAction();
//如果View是设置成不可用的（DISABLED）仍然会消费点击事件，只是不会做出任何响应
final boolean clickable = ((viewFlags & CLICKABLE) == CLICKABLE
|| (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)
|| (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE;
if ((viewFlags & ENABLED_MASK) == DISABLED
&& (mPrivateFlags4 & PFLAG4_ALLOW_CLICK_WHEN_DISABLED) == 0) {
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;
}
}
//只要进入此if则会返回true表示消费掉了这个事件，因此CLICKABLE和LONG_CLICKABLE只要有一个为true就消费这个事件
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;
mHasPerformedLongPress = false;
mIgnoreNextUpEvent = false;
break;
}
boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0;
if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) {
// take focus if we don't have it already and we should in
// touch mode.
boolean focusTaken = false;
if (isFocusable() && isFocusableInTouchMode() && !isFocused()) {
focusTaken = requestFocus();
}
//让View显示被点击的状态
if (prepressed) {
// The button is being released before we actually
// showed it as pressed. Make it show the pressed
// state now (before scheduling the click) to ensure
// the user sees it.
setPressed(true, x, y);
}
if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) {
// This is a tap, so remove the longpress check
removeLongPressCallback();
// Only perform take click actions if we were in the pressed state
if (!focusTaken) {
// Use a Runnable and post this rather than calling
// performClick directly. This lets other visual state
// of the view update before click actions start.
if (mPerformClick == null) {
mPerformClick = new PerformClick();
}
//调用performClick处理事件
if (!post(mPerformClick)) {
performClickInternal();
}
}
}
if (mUnsetPressedState == null) {
mUnsetPressedState = new UnsetPressedState();
}
if (prepressed) {
postDelayed(mUnsetPressedState,
ViewConfiguration.getPressedStateDuration());
} else if (!post(mUnsetPressedState)) {
// If the post failed, unpress right now
mUnsetPressedState.run();
}
removeTapCallback();
}
mIgnoreNextUpEvent = false;
break;
case MotionEvent.ACTION_DOWN:
if (event.getSource() == InputDevice.SOURCE_TOUCHSCREEN) {
mPrivateFlags3 |= PFLAG3_FINGER_DOWN;
}
mHasPerformedLongPress = false;
if (!clickable) {
checkForLongClick(
ViewConfiguration.getLongPressTimeout(),
x,
y,
TOUCH_GESTURE_CLASSIFIED__CLASSIFICATION__LONG_PRESS);
break;
}
if (performButtonActionOnTouchDown(event)) {
break;
}
// Walk up the hierarchy to determine if we're inside a scrolling container.
boolean isInScrollingContainer = isInScrollingContainer();
// For views inside a scrolling container, delay the pressed feedback for
// a short period in case this is a scroll.
if (isInScrollingContainer) {
mPrivateFlags |= PFLAG_PREPRESSED;
if (mPendingCheckForTap == null) {
mPendingCheckForTap = new CheckForTap();
}
mPendingCheckForTap.x = event.getX();
mPendingCheckForTap.y = event.getY();
postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
} else {
// Not inside a scrolling container, so show the feedback right away
setPressed(true, x, y);
checkForLongClick(
ViewConfiguration.getLongPressTimeout(),
x,
y,
TOUCH_GESTURE_CLASSIFIED__CLASSIFICATION__LONG_PRESS);
}
break;
case MotionEvent.ACTION_CANCEL:
if (clickable) {
setPressed(false);
}
removeTapCallback();
removeLongPressCallback();
mInContextButtonPress = false;
mHasPerformedLongPress = false;
mIgnoreNextUpEvent = false;
mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;
break;
case MotionEvent.ACTION_MOVE:
if (clickable) {
drawableHotspotChanged(x, y);
}
final int motionClassification = event.getClassification();
final boolean ambiguousGesture =
motionClassification == MotionEvent.CLASSIFICATION_AMBIGUOUS_GESTURE;
int touchSlop = mTouchSlop;
if (ambiguousGesture && hasPendingLongPressCallback()) {
if (!pointInView(x, y, touchSlop)) {
// The default action here is to cancel long press. But instead, we
// just extend the timeout here, in case the classification
// stays ambiguous.
removeLongPressCallback();
long delay = (long) (ViewConfiguration.getLongPressTimeout()
* mAmbiguousGestureMultiplier);
// Subtract the time already spent
delay -= event.getEventTime() - event.getDownTime();
checkForLongClick(
delay,
x,
y,
TOUCH_GESTURE_CLASSIFIED__CLASSIFICATION__LONG_PRESS);
}
touchSlop *= mAmbiguousGestureMultiplier;
}
// Be lenient about moving outside of buttons
if (!pointInView(x, y, touchSlop)) {
// Outside button
// Remove any future long press/tap checks
removeTapCallback();
removeLongPressCallback();
if ((mPrivateFlags & PFLAG_PRESSED) != 0) {
setPressed(false);
}
mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;
}
final boolean deepPress =
motionClassification == MotionEvent.CLASSIFICATION_DEEP_PRESS;
if (deepPress && hasPendingLongPressCallback()) {
// process the long click action immediately
removeLongPressCallback();
checkForLongClick(
0 /* send immediately */,
x,
y,
TOUCH_GESTURE_CLASSIFIED__CLASSIFICATION__DEEP_PRESS);
}
break;
}
return true;
}
return false;
}View的onTouchEvent方法默认都会消费掉事件（返回true），除非它是不可点击的（clickable和longClickable同时为false）
private boolean performClickInternal() {
// Must notify autofill manager before performing the click actions to avoid scenarios where
// the app has a click listener that changes the state of views the autofill service might
// be interested on.
notifyAutofillManagerOnClick();
return performClick();
} public boolean performClick() {
// We still need to call this method to handle the cases where performClick() was called
// externally, instead of through performClickInternal()
notifyAutofillManagerOnClick();
final boolean result;
final ListenerInfo li = mListenerInfo;
if (li != null && li.mOnClickListener != null) {
playSoundEffect(SoundEffectConstants.CLICK);
// 消费 onClick 函数
li.mOnClickListener.onClick(this);
result = true;
} else {
result = false;
}
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
notifyEnterOrExitForAutoFillIfNeeded(true);
return result;
}View在onTouchEvent处理ACTION_UP事件时会调用performClick，在performClick中会判断View有没有设置OnClickListener。
如果View设置了OnClickListener则会调用OnClickListener中的onClick方法，并返回true；如果没有设置OnClickListener则会返回false。无论返回true或者false都处理了此事件，onTouchEvent都返回true。
参考：
Android系统之View事件分发机制_litao55555的博客-CSDN博客_android viewgroup 事件分发