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肆无忌惮_:
多谢楼主分享
android内存泄露优化总结 -
wwwjiandan:
我用自定义Action为什么每次调用Activity时都提示找 ...
Activity之间的通信与自定义Action -
Zero颴:
写得好
android内存泄露优化总结 -
pigeon200461:
你好!请问你的这个项目里面是否使用sqlite3数据库。
android通过webview+jquery设计界面 -
ZHxin:
在activity中引入Fragment的xml方式确信能在低 ...
通过Compatibility Package低版本使用Fragment
转自:http://blog.sina.com.cn/s/blog_81d2da550100w48d.html
android中的事件类型分为按键事件和屏幕触摸事件,Touch事件是屏幕触摸事件的基础事件,有必要对它进行深入的了解。
一个最简单的屏幕触摸动作触发了一系列Touch事件:ACTION_DOWN->ACTION_MOVE->ACTION_MOVE->ACTION_MOVE...->ACTION_MOVE->ACTION_UP
当屏幕中包含一个ViewGroup,而这个ViewGroup又包含一个子view,这个时候android系统如何处理Touch事件呢?到底是ViewGroup来处理Touch事件,还是子view来处理Touch事件呢?我只能很肯定的对你说不一定。呵呵,为什么呢?看看下面我的调查结果你就明白了。
android系统中的每个View的子类都具有下面三个和TouchEvent处理密切相关的方法:
1)public boolean dispatchTouchEvent(MotionEvent ev) <wbr><span class="Apple-converted-space"> </span>这个方法用来分发TouchEvent<br>2)public boolean onInterceptTouchEvent(MotionEvent ev) 这个方法用来拦截TouchEvent<br>3)public boolean onTouchEvent(MotionEvent ev) 这个方法用来处理TouchEvent</wbr>
当TouchEvent发生时,首先Activity将TouchEvent传递给最顶层的View, TouchEvent最先到达最顶层 view 的 dispatchTouchEvent ,然后由 <wbr><span class="Apple-converted-space"> </span>dispatchTouchEvent 方法进行分发,如果dispatchTouchEvent返回true ,则交给这个view的onTouchEvent处理,如果dispatchTouchEvent返回 false ,则交给这个 view 的 interceptTouchEvent 方法来决定是否要拦截这个事件,如果 interceptTouchEvent 返回 true ,也就是拦截掉了,则交给它的 onTouchEvent 来处理,如果 interceptTouchEvent 返回 false ,那么就传递给子 view ,由子 view 的 dispatchTouchEvent 再来开始这个事件的分发。如果事件传递到某一层的子 view 的 onTouchEvent 上了,这个方法返回了 false ,那么这个事件会从这个 view 往上传递,都是 onTouchEvent 来接收。而如果传递到最上面的 onTouchEvent 也返回 false 的话,这个事件就会“消失”,而且接收不到下一次事件。<br>通过语言描述这个处理逻辑很抽象,下面我就用代码来具体说明一下。<br>layout配置文件 main.xml<br><?xml version="1.0" encoding="utf-8"?><br><test.lzqdiy.MyLinearLayout xmlns:android="<a style="color: rgb(107, 95, 36); text-decoration: none;" href="http://schemas.android.com/apk/res/android">http://schemas.android.com/apk/res/android</a>"<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:orientation="vertical"<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:layout_width="fill_parent"<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:layout_height="fill_parent"<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:gravity="center" ><br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span><test.lzqdiy.MyTextView<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:layout_width="200px"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:layout_height="200px"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:id="@+id/tv"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:text="lzqdiy"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:textSize="40sp"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:textStyle="bold"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:background="#FFFFFF"<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>android:textColor="#0000FF"/><br></test.lzqdiy.MyLinearLayout><br>节点层次很简单,一个LinearLayout中添加了一个TextView。<br>下面是java代码:<br>package test.lzqdiy;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
import android.app.Activity;
import android.os.Bundle;
public class TestTouchEventApp extends Activity {
<wbr> <wbr> <wbr><br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public void onCreate(Bundle savedInstanceState) {<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>super.onCreate(savedInstanceState);<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>setContentView(R.layout.main);<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}<br>}<br>package test.lzqdiy;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.LinearLayout;
public class MyLinearLayout extends LinearLayout {
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>private final String TAG = "MyLinearLayout";</wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public MyLinearLayout(Context context, AttributeSet attrs) {</wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>super(context, attrs);</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, TAG);</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public boolean dispatchTouchEvent(MotionEvent ev) {<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>int action = ev.getAction();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>switch (action) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_DOWN:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_DOWN");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_MOVE:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_MOVE");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_UP:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_UP");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_CANCEL:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_CANCEL");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>return super.dispatchTouchEvent(ev);<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public boolean onInterceptTouchEvent(MotionEvent ev) {</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>int action = ev.getAction();</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>switch (action) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_DOWN:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "onInterceptTouchEvent action:ACTION_DOWN");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_MOVE:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "onInterceptTouchEvent action:ACTION_MOVE");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_UP:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "onInterceptTouchEvent action:ACTION_UP");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_CANCEL:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "onInterceptTouchEvent action:ACTION_CANCEL");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>return false;</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public boolean onTouchEvent(MotionEvent ev) {</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>int action = ev.getAction();</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>switch (action) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_DOWN:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_DOWN");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_MOVE:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_MOVE");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_UP:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_UP");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_CANCEL:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_CANCEL");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>return true;<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
}
package test.lzqdiy;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.TextView;
public class MyTextView extends TextView {
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>private final String TAG = "MyTextView";</wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public MyTextView(Context context, AttributeSet attrs) {</wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>super(context, attrs);</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public boolean dispatchTouchEvent(MotionEvent ev) {<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>int action = ev.getAction();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>switch (action) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_DOWN:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_DOWN");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_MOVE:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_MOVE");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_UP:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "dispatchTouchEvent action:ACTION_UP");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_CANCEL:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "onTouchEvent action:ACTION_CANCEL");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}<br> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>return super.dispatchTouchEvent(ev);<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>@Override<br> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>public boolean onTouchEvent(MotionEvent ev) {</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>int action = ev.getAction();</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>switch (action) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_DOWN:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_DOWN");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_MOVE:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_MOVE");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_UP:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_UP");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>case MotionEvent.ACTION_CANCEL:</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>Log.d(TAG, "---onTouchEvent action:ACTION_CANCEL");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>break;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>return true;</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> <wbr> <wbr><span class="Apple-converted-space"> </span>}</wbr></wbr></wbr>
}
为了指代方便,下面将MyLinearLayout简称为L,将MyTextView简称为T,L.onInterceptTouchEvent=true 表示的含义为MyLinearLayout中的onInterceptTouchEvent方法返回值为true,通过程序运行时输出的Log来说明调用时序。
第1种情况 L.onInterceptTouchEvent=false&& L.onTouchEvent=true &&T.onTouchEvent=true 输出下面的Log:
D/MyLinearLayout(11865): dispatchTouchEvent action:ACTION_DOWN
D/MyLinearLayout(11865): onInterceptTouchEvent action:ACTION_DOWN
D/MyTextView(11865): dispatchTouchEvent action:ACTION_DOWN
D/MyTextView(11865): ---onTouchEvent action:ACTION_DOWN
D/MyLinearLayout(11865): dispatchTouchEvent action:ACTION_MOVE
D/MyLinearLayout(11865): onInterceptTouchEvent action:ACTION_MOVE
D/MyTextView(11865): dispatchTouchEvent action:ACTION_MOVE
D/MyTextView(11865): ---onTouchEvent action:ACTION_MOVE
...........省略其他的ACTION_MOVE事件Log
D/MyLinearLayout(11865): dispatchTouchEvent action:ACTION_UP
D/MyLinearLayout(11865): onInterceptTouchEvent action:ACTION_UP
D/MyTextView(11865): dispatchTouchEvent action:ACTION_UP
D/MyTextView(11865): ---onTouchEvent action:ACTION_UP
结论:TouchEvent完全由TextView处理。
第2种情况 <wbr><span class="Apple-converted-space"> </span>L.onInterceptTouchEvent=false&& L.onTouchEvent=true &&T.onTouchEvent=false 输出下面的Log:<br>D/MyLinearLayout(13101): dispatchTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13101): onInterceptTouchEvent action:ACTION_DOWN<br>D/MyTextView(13101): dispatchTouchEvent action:ACTION_DOWN<br>D/MyTextView(13101): ---onTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13101): ---onTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13101): dispatchTouchEvent action:ACTION_MOVE<br>D/MyLinearLayout(13101): ---onTouchEvent action:ACTION_MOVE<br>...........省略其他的ACTION_MOVE事件Log<br>D/MyLinearLayout(13101): dispatchTouchEvent action:ACTION_UP<br>D/MyLinearLayout(13101): ---onTouchEvent action:ACTION_UP<br>结论:TextView只处理了ACTION_DOWN事件,LinearLayout处理了所有的TouchEvent。<br>第3种情况 <wbr><span class="Apple-converted-space"> </span>L.onInterceptTouchEvent=true&& L.onTouchEvent=true 输出下面的Log:<br>D/MyLinearLayout(13334): dispatchTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13334): onInterceptTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13334): ---onTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13334): dispatchTouchEvent action:ACTION_MOVE<br>D/MyLinearLayout(13334): ---onTouchEvent action:ACTION_MOVE<br>...........省略其他的ACTION_MOVE事件Log<br>D/MyLinearLayout(13334): dispatchTouchEvent action:ACTION_UP<br>D/MyLinearLayout(13334): ---onTouchEvent action:ACTION_UP<br>结论:LinearLayout处理了所有的TouchEvent。<br>第4种情况 <wbr><span class="Apple-converted-space"> </span>L.onInterceptTouchEvent=true&& L.onTouchEvent=false 输出下面的Log:<br>D/MyLinearLayout(13452): dispatchTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13452): onInterceptTouchEvent action:ACTION_DOWN<br>D/MyLinearLayout(13452): ---onTouchEvent action:ACTION_DOWN<br>结论:LinearLayout只处理了ACTION_DOWN事件,那么其他的TouchEvent被谁处理了呢?答案是LinearLayout最外层的Activity处理了TouchEvent。</wbr></wbr></wbr>
发表评论
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android内存泄露优化总结
2012-03-25 12:50 28100android手机给应用分配的 ... -
Android Market 链接的生成与分享
2012-02-21 11:59 5127通过Java包名直接定位到 ... -
【转】设置android程序平板下全屏
2011-12-13 11:11 3087【转自】http://blog.csdn.net/huoshe ... -
android 图片处理
2011-11-24 10:11 3236多张图片四个方位的图片合成,改变bitmap大小,图片去色等功 ... -
android 手机指令大全
2011-11-23 17:59 1*#*#4636#*#* 显示手机信息、电池信息、电池记录 ... -
Android-Activity Task 与 Intent Filter Flag
2011-11-17 10:47 4441接触 Android 以来,一直 ... -
ListView加载原理
2011-10-20 10:52 1310http://www.cnblogs.com/xiaowenj ... -
【转】SoftReference 和 WeakReference
2011-10-10 10:45 1564Java 和 Android 内存优化的两个类:SoftRef ... -
android异常处理发送消息给服务器
2011-10-08 18:45 3185转自:http://www.cnblogs.com/st ... -
通过Compatibility Package低版本使用Fragment
2011-09-26 16:47 4614android 3.0有很多新特性 其中有Fragmen ... -
PopupWindow+listItem 泡泡效果
2011-09-21 15:48 3939package com.my; import androi ... -
Notification使用
2011-09-20 18:52 2060代码:package com.my; import a ... -
ViewSwitcher,ImageSwitcher,TextSwitcher的使用
2011-09-19 14:45 3212ImageSwitcher用于图片的切换动画效果 TextS ... -
requestWindowFeature使用详解
2011-09-19 10:41 100158requestWindowFeature可以设置的值有: / ... -
ViewSwitcher的使用
2011-09-16 10:17 4576[Android]ViewSwitcher使用范例 作 ... -
通过createPackageContext 实现皮肤打包成apk的demo
2011-09-14 16:56 4776通过Context friendContext = ... -
android selector使用
2011-08-30 10:10 3306转自:http://blog.sina.com ... -
android shape的使用
2011-08-30 10:07 1159转自:http://dev.10086.cn/cmdn/wi ... -
android迅雷下载搭建开发环境
2011-07-13 10:57 2169附件中有图片 转自: ... -
android四种补间动画
2011-07-12 12:24 7971android的动画分为两大类:补间动画,帧动画。 补间动画 ...
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