转载:http://blog.csdn.net/jxxfzgy/article/details/43926987
Android 事件处理机制说难也不难,说简单也不简单,为什么这么说呢?因为我相信大部分有了一定 Android 基础的同学,想要分析 Android 事件处理机制,都是可以分析出来了;但要灵活运用它却又觉得很吃力,而且往往需要查阅各种资料文档,才能真正把它运用起来。今天我带领大家对 Android 事件处理机制做一次全方位的分析,从而达到大家对 Android 事件处理有一个更深、更形象的认识!
一、初体验:
相信大部分的人对 Android 事件处理机制的分析,都是通过打印 log 的方式,这里也是通过这种方式来分析;首先准备三个类 MainActivity 、EventLayout 、EventTextView ,这几个类分别是什么都做了些什么呢?我们看看代码就知道。
1、MainActivity
public class MainActivity extends ActionBarActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {boolean handle = false ;String str = "ACTION_DOWN";switch (ev.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";handle = true ;break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy","=====Activity=====dispatchTouchEvent========"+str) ;return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent event) {String str = "ACTION_DOWN";boolean handle = false ;switch (event.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";handle = true ;break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy","=====Activity=====onTouchEvent========"+str) ;return super.onTouchEvent(event);}
}
2、EventLayout
/*** Created by gyzhong on 15/2/18.*/
public class EventLayout extends LinearLayout {public EventLayout(Context context) {super(context);}public EventLayout(Context context, AttributeSet attrs) {super(context, attrs);}public EventLayout(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent ev) {String str = "ACTION_DOWN";switch (ev.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy", "=====ViewGroup=====onInterceptTouchEvent========"+str) ;if(handle){return handle ;}return super.onInterceptTouchEvent(ev);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {boolean handle = false ;switch (ev.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy", "=====ViewGroup=====dispatchTouchEvent========"+str) ;if(handle){return handle ;}return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent event) {String str = "ACTION_DOWN";switch (event.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy","=====ViewGroup=====onTouchEvent========"+str) ;return super.onTouchEvent(event);}
}
3、EventTextView
/*** Created by gyzhong on 15/2/18.*/
public class EventTextView extends TextView {public EventTextView(Context context) {super(context);}public EventTextView(Context context, AttributeSet attrs) {super(context, attrs);}public EventTextView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {String str = "ACTION_DOWN";switch (ev.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy", "=====View=====dispatchTouchEvent========"+str+ ",getX() ="+ev.getX()) ;return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent event) {String str = "ACTION_DOWN";boolean handle = false ;switch (event.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy","=====View=====onTouchEvent========"+str) ;return super.onTouchEvent(event);}
}
通过代码可以看到,3个类基本上什么都没做,只是重写了父类的dispatchTouchEvent、onTouchEvent、onInterceptTouchEvent方法,也只是在其中加入了调试信息,那再来看看 xml
<com.gyzhong.eventdemo.EventLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:layout_gravity="center_horizontal"
><com.gyzhong.eventdemo.EventTextViewandroid:layout_width="120dp"android:layout_height="60dp"android:gravity="center"android:text="eventText"/>
</com.gyzhong.eventdemo.EventLayout>
这里把我们重写的 自定义的 View 放入布局中。运行代码,开始调试,然后点击EventTextView可以看到 log 信息:
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UP
通过信息和结合我们所学的知识点,还是很容易得出结论来:
Activity 的 dispatchTouchEvent的事件分发给ViewGroup,ViewGroup先通过事件拦截onInterceptTouchEvent(只有 ViewGroup 才有此方法)来判断,是否拦截,如果没有拦截则将事件分发给 View 的分发机制dispatchTouchEvent;View 获取到事件后,就开始调用 onTouchEvent 方法,如果 View 的 onTouchEvent 未把事件消费掉,则把事件有传递给 ViewGroup 的 onTouchEvent,同理,ViewGroup 未把事件消费掉,继续往下级传到了 Activity 的 onTouchEvent 事件处理中。文字讲解终究是有点难理解,需要结合图文来讲解,那么我们来看下下面这张图,应该很清晰明了。
通过上图,我们可以得出以下几点结论:
1、Android 事件传递是层级传递的;
2、dispatchTouchEvent从底层向上层传递,而onTouchEvent刚好相反;
3、onInterceptTouchEvent返回为 true 时,将执行同层级的onTouchEvent,而dispatchTouchEvent和onTouchEvent返回 true 时,将终止事件的传递。
上面我们提到了两个关键词,拦截和消费,其实都是图片中表示的 return 返回值,在 dispatchTouchEvent 我们习惯用拦截,而在 onTouchEvent 中则习惯用消费来说明(个人习惯而已)。return false 表示事件未被dispatchTouchEvent拦截,也未被onTouchEvent消费。好了,到此我们的Android 事件处理机制分析完了,感谢大家的阅读。汗、汗、汗、、、 真的分析完了吗,如果只是这样就结束了,我也不会在大过年的,在这里苦逼苦逼的写 blog。那么接下来我们进入第二阶段。
二、深度剖析
还记得前面第一阶段的标题”初体验”为什么叫初体验呢?大致可以认为是我们的第一印象,我们最初感觉出来的东西。无论是根据自己的逻辑来推理,还是根据刚刚我们看到的调试信息来看,事件处理机的制整体流程都是按照上面图1-1的流程来走的。但是,细心的同学肯定看到了最后两行调试信息
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UP
对,你没有看错,我也没有调错,ACTION_UP的时候它确实只打印了两行,并都是在 Activity 中打印的。并不像 ACTION_DOWN 的时候执行了
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
也许这样看还不明显,再来看看一下调试信息
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UP
这里可以看到只有在 ACTION_DOWN 的时候是按照我们分析的流程图来执行,而 ACTION_MOVE、ACTION_UP 都只是执行了 Activity 的dispatchTouchEvent和onTouchEvent,这是为什么?难道我们不是按照上面那张流程图的流程来执行?这里我可以肯定的告诉大家,上面那张图的流程是绝对没有问题的,只是有些事件被拦截或消费掉。并且这里告诉大家一个结论:
ViewGroup 和 View的dispatchTouchEvent分发事件在 action 为ACTION_DOWN时没有被拦截且onTouchEvent的处理事件在 action 为ACTION_DOWN时未被消费,当 action 为ACTION_MOVE或ACTION_UP时,dispatchTouchEvent和onTouchEvent只有在 activity 被调用。想搞清楚和验证这个结论的同学,可以自己根据源码深入探究!
通过以上结论,可知,在手指滑动或者抬起的时候,ViewGroup 和 View 的dispatchTouchEvent和onTouchEvent未被执行,因为事件未被拦截或者消费。
我在网上看过一些 Android 事件处理机制的帖子和 bolg,我记得有这样一个问题,为什么我在分析 Android 事件处理的时候,用 TextView 和 Button ,分析出来的结果不一样呢?这里我们用的是 TextView 分析的,我们也来看看 Button 的效果,到底哪里不一样。新建一个 EventButton类和 EventTextView 一样,除了继承的对象不同之外。
EventButton
/*** Created by gyzhong on 15/2/18.*/
public class EventButton extends Button {public EventButton(Context context) {super(context);}public EventButton(Context context, AttributeSet attrs) {super(context, attrs);}public EventButton(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {String str = "ACTION_DOWN";switch (ev.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy", "=====View=====dispatchTouchEvent========"+str+ ",getX() ="+ev.getX()) ;return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent event) {String str = "ACTION_DOWN";boolean handle = false ;switch (event.getAction()){case MotionEvent.ACTION_DOWN:str = "ACTION_DOWN";break ;case MotionEvent.ACTION_MOVE:str = "ACTION_MOVE";break;case MotionEvent.ACTION_UP:str = "ACTION_UP";break;}Log.v("zgy","=====View=====onTouchEvent========"+str) ;return super.onTouchEvent(event);}
}
记得别忘记修改 xml 中的内容
<com.gyzhong.eventdemo.EventLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:layout_gravity="center_horizontal"
><com.gyzhong.eventdemo.EventButtonandroid:layout_width="120dp"android:layout_height="60dp"android:gravity="center"android:text="eventButton"/>
</com.gyzhong.eventdemo.EventLayout>
再次运行代码,果然,结果不一样
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onInterceptTouchEvent========ACTION_MOVE
=====View=====dispatchTouchEvent========ACTION_MOVE
=====View=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onInterceptTouchEvent========ACTION_MOVE
=====View=====dispatchTouchEvent========ACTION_MOVE
=====View=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====onInterceptTouchEvent========ACTION_UP
=====View=====dispatchTouchEvent========ACTION_UP
=====View=====onTouchEvent========ACTION_UP
我们根据调试结果再加上流程图不难推测出,在 View 的 onTouchEvent 的事件处理机制中把事件消费掉了,并且在 action 为 ACTION_DOWN、ACTION_MOVE、ACTION_UP 的时候全部消费掉了,所以不会再往下执行,那我们就来看看源码是否如此。
进入到 View 的onTouchEvent方法中
public boolean onTouchEvent(MotionEvent event) {//省略部分代码if (((viewFlags & CLICKABLE) == CLICKABLE ||(viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) {}//省略很多代码return true;}return false;
}
以上代码,我把有用的几行提取出来了,可以看到,有一个判断条件,如果 View 是可以点击的状态,return true 事件将会被消费掉,否则 return false 不会被消费掉。而我们都知道 TextView 默认状态是不可点击的, Button 是可以点击的,所以这也就是为什么 TextView 和 Button 的调试效果不一样,如果把 Button 设为不可点击,效果就和 TextView 的完全一样,有兴趣的同学可以自己尝试一下。
四、总结
讲了那么多,其实核心就是那张图片,只要掌握了那张图片中事件的流程基本上就没什么问题了;
这张图反应出来的信息有:
1、Android 事件传递是层级传递的;
2、dispatchTouchEvent从低级向上级传递,而onTouchEvent刚好相反;
3、onInterceptTouchEvent返回为 true 时,将执行同级的onTouchEvent,而dispatchTouchEvent和onTouchEvent返回 true 时,将终止事件的传递。
还有一点特别重要,也是比较难理解的一点,就是我前面说的那个结论。
ViewGroup 和 View的dispatchTouchEvent分发事件在 action 为ACTION_DOWN时没有被拦截且onTouchEvent的处理事件在 action 为ACTION_DOWN时未被消费,当 action 为ACTION_MOVE或ACTION_UP时,dispatchTouchEvent和onTouchEvent只有在 activity 被调用。
最后我将在下篇 blog 中,通过自定义通用型的下拉刷新来实战事件处理机制,如果有兴趣的同学,可以关注。
这里附上一张 时序图和log 信息
Activity dispatchTouchEvent——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPActivity dispatchTouchEvent——->Action == ACTION_MOVE return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPActivity dispatchTouchEvent——->Action == ACTION_UP return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UPViewGroup dispatchTouchEvent——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====onTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup dispatchTouchEvent——->Action == ACTION_MOVE return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup dispatchTouchEvent——->Action == ACTION_UP return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup onInterceptTouchEvent——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView dispatchTouchEvent——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onInterceptTouchEvent========ACTION_MOVE
=====View=====dispatchTouchEvent========ACTION_MOVE
=====View=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====onInterceptTouchEvent========ACTION_UP
=====View=====dispatchTouchEvent========ACTION_UP
=====View=====onTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView dispatchTouchEvent——->Action == ACTION_MOVE return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView dispatchTouchEvent——->Action == ACTION_UP return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView onTouchEvent ——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onInterceptTouchEvent========ACTION_MOVE
=====View=====dispatchTouchEvent========ACTION_MOVE
=====View=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====onInterceptTouchEvent========ACTION_UP
=====View=====dispatchTouchEvent========ACTION_UP
=====View=====onTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView onTouchEvent ——->Action == ACTION_MOVE return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPView onTouchEvent ——->Action == ACTION_UP return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup onTouchEvent ——->Action == ACTION_DOWN return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====dispatchTouchEvent========ACTION_MOVE
=====ViewGroup=====onTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====dispatchTouchEvent========ACTION_UP
=====ViewGroup=====onTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup onTouchEvent ——->Action == ACTION_MOVE return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UPViewGroup onTouchEvent ——->Action == ACTION_UP return true
=====Activity=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====dispatchTouchEvent========ACTION_DOWN
=====ViewGroup=====onInterceptTouchEvent========ACTION_DOWN
=====View=====dispatchTouchEvent========ACTION_DOWN
=====View=====onTouchEvent========ACTION_DOWN
=====ViewGroup=====onTouchEvent========ACTION_DOWN
=====Activity=====onTouchEvent========ACTION_DOWN
=====Activity=====dispatchTouchEvent========ACTION_MOVE
=====Activity=====onTouchEvent========ACTION_MOVE
=====Activity=====dispatchTouchEvent========ACTION_UP
=====Activity=====onTouchEvent========ACTION_UP
源码下载:
源码