1、通過RunningTaskInfo類判斷（需要額外權(quán)限）：
/**
*判斷當前應用程序處于前臺還是后臺
*/
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;
}
需要在AndroidMenitfest.xml文件中添加以下權(quán)限
<uses-permission android:name="android.permission.GET_TASKS" />
2、通過RunningAppProcessInfo類判斷（不需要額外權(quán)限）：
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("后臺", appProcess.processName);
return true;
}else{
Log.i("前臺", appProcess.processName);
return false;
}
}
}
return false;
}
