【Android自动触发】

参考资料：http://www.cnblogs.com/vowei/archive/2012/07/30/2614353.html

连接view server

（1）Forword端口。


         采用adb devices命令会展示当前主机运行的Android设备

adb  devices

List of devices attached
emulator-5554   device
emulator-5556   device

         以emulator-5554为例，我们将它的4939端口映射到PC机上的4939端口

adb -s emulator-5556 forward tcp:4939 tcp:4939

          如果连接了多台Android设备，HierarchyViewer将把下一台Android设备的4939端口映射到PC的4940端口，以此类推。



  （2）打开ViewServer服务。

      

          首先，需要判断ViewServer是否打开:

adb -s emulator-5556 shell service call window 3

 

         如果返回值是"Result: Parcel(00000000 00000000 '........')"，说明ViewServer没有打开，那么需要用下面的命令打开ViewServer:

adb -s emulator-5556 shell service call window 1 i32 4939

 

          反之，关闭ViewServer的命令是：

adb -s emulator-5556 shell service call window 2 i32 4939

    （3）连接ViewServer。
 
       既然ViewServer已经打开，那么下一步我们就需要连接它了。

 
      由于我们已经把设备emulator-5556的4939端口映射为PC的4939端口上，所以我们需要连接的是127.0.0.1:4939。这需要写一些java代码：

import java.net.*;

try{
Socket socket = new Socket();
socket.connect(new InetSocketAddress("127.0.0.1", 4939),40000);
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream(), "utf-8"));
}
} catch ( Exception e ) {
e.printStackTrace();
}

           out和in用于发送命令和接受返回数据，需要注意的是，HierarchyViewer和ViewServer的通信采用短连接，所以每发送一次命令，需要重新建立一次连接，所以以上代码需要反复调用。



      如何获取活动的Activity？

 
 

//send ‘LIST’ command
out.write("LIST");
out.newLine();
out.flush();

//receive response from viewserver
String context="";
String line;
while ((line = in.readLine()) != null) {
if ("DONE.".equalsIgnoreCase(line)) { //$NON-NLS-1$
break;
}
context+=line+"\r\n";
}

 
  我们获取的是这样的列表：

44fd1b78 com.android.internal.service.wallpaper.ImageWallpaper
4507aa28 com.android.launcher/com.android.launcher2.Launcher
45047328 com.tencent.mobileqq/com.tencent.mobileqq.activity.HomeActivity
450b8d18 com.tencent.mobileqq/com.tencent.mobileqq.activity.NotificationActivity
451049c0 com.tencent.mobileqq/com.tencent.mobileqq.activity.NotificationActivity
451167a8 com.tencent.mobileqq/com.tencent.mobileqq.activity.UpgradeActivity
450efef0 com.tencent.mobileqq/com.tencent.mobileqq.activity.UpgradeActivity
4502f2e0 TrackingView
4503f560 StatusBarExpanded
44fe0bb0 StatusBar
44f09250 Keyguard

     注意，每行前面的16进制数字，那是一个hashcode，我们在进一步请求该Activity对应的控件树时要用到该hashcode。

如何获取Activity的控件树 

 
    获取控件树信息的命令是DUMP，后面要接对应的Activity的hash code，如果使用ffffffff作为参数，那么就是取最前端的Activity。

 
   我们以com.android.launcher2.Launcher为例，它的hash code是4507aa28，看代码：

 
   其实也可以用“dump -1”来获取

//out.write("DUMP ffffffff");
out.write("DUMP 4507aa28");
out.newLine();
out.flush();

String context1="";
line="";
while ((line = in.readLine()) != null) {
if ("DONE.".equalsIgnoreCase(line)) { //$NON-NLS-1$
break;
}
context1+=line+"\r\n";
}

     返回的控件树被保存文本context1中，一般文本的内容都非常大，这里我不把它全部打印出来，我们只取其中一行来看：

android.widget.FrameLayout@44edba90 mForeground=52,android.graphics.drawable.NinePatchDrawable@44edc1e0 mForegroundInPadding=5,false mForegroundPaddingBottom=1,0 mForegroundPaddingLeft=1,0 mForegroundPaddingRight=1,0 mForegroundPaddingTop=1,0 mMeasureAllChildren=5,false mForegroundGravity=2,55 getDescendantFocusability()=24,FOCUS_BEFORE_DESCENDANTS getPersistentDrawingCache()=9,SCROLLING isAlwaysDrawnWithCacheEnabled()=4,true isAnimationCacheEnabled()=4,true isChildrenDrawingOrderEnabled()=5,false isChildrenDrawnWithCacheEnabled()=5,false mMinWidth=1,0 mPaddingBottom=1,0 mPaddingLeft=1,0 mPaddingRight=1,0 mPaddingTop=2,38 mMinHeight=1,0 mMeasuredWidth=3,480 mMeasuredHeight=3,800 mLeft=1,0 mPrivateFlags_DRAWING_CACHE_INVALID=3,0x0 mPrivateFlags_DRAWN=4,0x20 mPrivateFlags=8,16911408 mID=10,id/content mRight=3,480 mScrollX=1,0 mScrollY=1,0 mTop=1,0 mBottom=3,800 mUserPaddingBottom=1,0 mUserPaddingRight=1,0 mViewFlags=9,402653186 getBaseline()=2,-1 getHeight()=3,800 layout_bottomMargin=1,0 layout_leftMargin=1,0 layout_rightMargin=1,0 layout_topMargin=1,0 layout_height=12,MATCH_PARENT layout_width=12,MATCH_PARENT getTag()=4,null getVisibility()=7,VISIBLE getWidth()=3,480 hasFocus()=5,false isClickable()=5,false isDrawingCacheEnabled()=5,false isEnabled()=4,true isFocusable()=5,false isFocusableInTouchMode()=5,false isFocused()=5,false isHapticFeedbackEnabled()=4,true isInTouchMode()=4,true isOpaque()=5,false isSelected()=5,false isSoundEffectsEnabled()=4,true willNotCacheDrawing()=5,false willNotDraw()=5,false

       返回的文本中的每一行是Activity中的一个控件，里面包含了该控件的所有信息，HierarchyViewer正是通过解析这些信息并把它们显示在属性列表中的。

       需要注意每行的开始处都包含一个“控件类型@hash code”的字段，如android.widget.FrameLayout@44edba90 ，这个字段在获取该控件的屏幕截图时将被用到。

       HierarchyViewer是怎么把这个文本解析成层次图的呢？ 原来，每行前面都有若干空格的缩进，比如缩进5个空格表示该控件在第六层，那么往上找，最近的缩进4个空格的控件就是它的父控件。

 
    附：小可代码：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.InetSocketAddress;
import java.net.Socket;

import com.android.ddmlib.AndroidDebugBridge;
import com.android.ddmlib.IDevice;
//import com.android.hierarchyviewerlib.device.DeviceBridge;
import com.android.hierarchyviewerlib.device.DeviceBridge;

public class hierarchy{
//   get Element list
public static void listActivity(){
Socket socket;
BufferedReader in;
BufferedWriter out;
socket = null;
in = null;
out = null;
try{
socket= new Socket();
socket.connect(new InetSocketAddress("127.0.0.1", 4939),40000);
out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
in = new BufferedReader(new InputStreamReader(socket.getInputStream(), "utf-8"));

//send ‘LIST’ command
out.write("LIST");
out.newLine();
out.flush();

//receive response from viewserver
//-----get the activity-----
String context="";
String line;
while ((line = in.readLine()) != null) {
if ("DONE.".equalsIgnoreCase(line)) { //$NON-NLS-1$
break;
}
context+=line+"\r\n";
System.out.println(context);
}

// DUMP
socket= new Socket();
socket.connect(new InetSocketAddress("127.0.0.1", 4939),40000);
out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
in = new BufferedReader(new InputStreamReader(socket.getInputStream(), "utf-8"));
out.write("DUMP -1");
out.newLine();
out.flush();

String context1="";

String line1="";
//	System.out.println("HI"+in.readLine());
while ((line1 = in.readLine()) != null) {
if ("DONE.".equalsIgnoreCase(line1)) { //$NON-NLS-1$
break;
}
context1+=line1+"\r\n";

System.out.println(context1);
}

} catch ( Exception e ) {
e.printStackTrace();
}

}

public static void main(String[] args){
listActivity();
}

}