Android UsageStatsManager: Get a list of currently running apps on phone

Question

I am trying to get a list of currently running apps on my phone. Here is the code I am using:

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VER         


        

Answer 1

The problem is that your application does not have the system permission of android:get_usage_stats.

You can use the below code to check if you have the permission:

public static boolean needPermissionForBlocking(Context context){
try {
    PackageManager packageManager = context.getPackageManager();
    ApplicationInfo applicationInfo = packageManager.getApplicationInfo(context.getPackageName(), 0);
    AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
    int mode = appOpsManager.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS, applicationInfo.uid, applicationInfo.packageName);
    return  (mode != AppOpsManager.MODE_ALLOWED);
} catch (PackageManager.NameNotFoundException e) {
    return true;
}
}

If you do not have the permission then the user must enable this permission by going to Settings -> Security-> Apps with usage access, and then adding your application. Your code should then work fine.