Android判斷當(dāng)前應(yīng)用程序處于前臺(tái)還是后臺(tái)的兩種方法

2020-04-11 11:58:21

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1、通過(guò)RunningTaskInfo類判斷（需要額外權(quán)限）：

/**
     *判斷當(dāng)前應(yīng)用程序處于前臺(tái)還是后臺(tái)
     */
    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

復(fù)制代碼代碼如下:

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

2、通過(guò)RunningAppProcessInfo類判斷（不需要額外權(quán)限）：

復(fù)制代碼代碼如下:

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(tái)", appProcess.processName);
                          return true;
                }else{
                          Log.i("前臺(tái)", appProcess.processName);
                          return false;
                }
           }
    }
    return false;
}