Question

I am developing an app related to ActivityManager.

I want to get information about all running activityies inside the system by using
ActivityManager.

How can this be done?

Answer 1

Use ActivityManger.getRunningTasks(Integer.MAX_VALUE)

List<RunningTaskInfo> a=am.getRunningTasks(Integer.MAX_VALUE);

Further use PackageManager to get the detail information about the task .

PackageManager pack=this.getPackageManager(); 

Finally iterate through the list of RunningTaskInfo and get the info of each task :

    for(int i=0;i<a.size();i++){

    String packageName = a.get(i).topActivity.getPackageName();
    String appName= (String) pack.getApplicationLabel(pack.getApplicationInfo(packageName,PackageManager.GET_META_DATA));
    Drawable d=pack.getApplicationIcon(packageName);

    Log.v("details"," "+packageName+" "+appName);    

    }

Need to add the permission in manifest file also

<uses-permission android:name="android.permission.GET_TASKS"/>

Hope this will help you.