上周做一个小的功能，修改statusbar，在launcher界面和其它应用界面显示不同的背景色和icon，最初想的就是接受系统activity启动的广播，进行判断，研究了一段时间，发现接受不到广播，最后在网上搜索资料，发现monkey代码中有一段代码可以接受activity启动和resume事件。最终满足要求。代码如下
1.设置观察者
mAm = ActivityManagerNative.getDefault();
try {
mAm.setActivityController(new ActivityController());
} catch (RemoteException e) {
System.err.println("** Failed talking with activity manager!");
}
2.观察者类
private class ActivityController extends IActivityController.Stub {
//start
public boolean activityStarting(Intent intent, String pkg) {
currentPkg = pkg;
mHandler.sendEmptyMessage(MSG_UPDATE_BACKGROUND);
//currentIntent = intent;
return true;
}
//resume
public boolean activityResuming(String pkg) {
currentPkg = pkg;
mHandler.sendEmptyMessage(MSG_UPDATE_BACKGROUND);
return true;
}
public int appEarlyNotResponding(String processName, int pid, String annotation){
return 0;
}
public boolean appCrashed(String processName, int pid,
String shortMsg, String longMsg,
long timeMillis, String stackTrace) {
/* System.err.println("// CRASH: " + processName + " (pid " + pid + ")");
System.err.println("// Short Msg: " + shortMsg);
System.err.println("// Long Msg: " + longMsg);
System.err.println("// Build Label: " + Build.FINGERPRINT);
System.err.println("// Build Changelist: " + Build.VERSION.INCREMENTAL);
System.err.println("// Build Time: " + Build.TIME);
System.err.println("// " + stackTrace.replace("\n", "\n// "));
if (!mIgnoreCrashes) {
synchronized (Monkey.this) {
mAbort = true;
}
return !mKillProcessAfterError;
}*/
return false;
}
public int appNotResponding(String processName, int pid, String processStats) {
// System.err.println("// NOT RESPONDING: " + processName + " (pid " + pid + ")");
//System.err.println(processStats);
return 0;
}
在一个service中加入以上代码，当activity活动时就会调用上述的方法packagename为activity的所在包名
由于ActivityManagerNative和IActivityController都属于内部类，所以该方法需要在源码环境下才可以使用
附一份IActivityController.aidl源码函数说明
package android.app;
import android.content.Intent;
/**
* Testing interface to monitor what is happening in the activity manager
* while tests are running.Not for normal application development.
* {@hide}
*/
interface IActivityController
{
/**
* The system is trying to start an activity.Return true to allow
* it to be started as normal, or false to cancel/reject this activity.
*/
boolean activityStarting(in Intent intent, String pkg);
/**
* The system is trying to return to an activity.Return true to allow
* it to be resumed as normal, or false to cancel/reject this activity.
*/www.2cto.com
boolean activityResuming(String pkg);
/**
* An application process has crashed (in Java).Return true for the
* normal error recovery (app crash dialog) to occur, false to kill
* it immediately.
*/
boolean appCrashed(String processName, int pid,
String shortMsg, String longMsg,
long timeMillis, String stackTrace);
/**
* Early call as soon as an ANR is detected.
*/
int appEarlyNotResponding(String processName, int pid, String annotation);
/**
* An application process is not responding.Return 0 to show the "app
* not responding" dialog, 1 to continue waiting, or -1 to kill it
* immediately.
*/
int appNotResponding(String processName, int pid, String processStats);
}
作者：androidchuxueze
