Android 判断应用处于前后台

Posted 2022-12-08 Gjson

1、通过RunningTaskInfo类判断（需要额外权限）：

代码如下:

/**
     *判断当前应用程序处于前台还是后台
     */
    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文件中添加以下权限

代码如下:

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

2、通过RunningAppProcessInfo类判断（不需要额外权限）： 

代码如下:

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("后台", appProcess.processName);
                          return true;
                else
                          Log.i("前台", appProcess.processName);
                          return false;
               
          
   
    return false;