/**
*判断当前应用程序处于前台还是后台
*
* @param context
* @return
*/
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;
}
上面这段代码是需要一个权限的：
<uses-permission android:name="android.permission.GET_TASKS" />
下面这段代码也可以判断，无需权限
/**
*
* @param context
* @return
*/
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(String.format("Background App:",
appProcess.processName));
return true;
} else {
Log.i(String.format("Foreground App:",
appProcess.processName));
return false;
}
}
}
return false;
}