Android two ways to determine whether the current application is in the foreground or the background
- 2020-05-24 06:07:29
- OfStack
1. Judge by class RunningTaskInfo (additional permissions are required) :
/**
* Determine whether the current application is in the foreground or background
*/
public static boolean isApplicationBroughtToBackground(final Context context) {
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> tasks = am.getRunningTasks(1);
if (!tasks.isEmpty()) {
ComponentName topActivity = tasks.get(0).topActivity;
if (!topActivity.getPackageName().equals(context.getPackageName())) {
return true;
}
}
return false;
}
You need to add the following permissions to the AndroidMenitfest.xml file
<uses-permission android:name="android.permission.GET_TASKS" />
2. Judge by RunningAppProcessInfo class (no additional permission is required) :
public static boolean isBackground(Context context) {
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
for (RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.processName.equals(context.getPackageName())) {
if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
Log.i(" The background ", appProcess.processName);
return true;
}else{
Log.i(" The front desk ", appProcess.processName);
return false;
}
}
}
return false;
}