获取Android正在运行的任务和服务

最新推荐文章于 2023-05-06 11:26:49 发布

转载最新推荐文章于 2023-05-06 11:26:49 发布 · 593 阅读

android学习知识点专栏收录该内容

109 篇文章

订阅专栏

本文提供了一系列用于检测Android应用状态的方法，包括检查特定Activity是否位于任务栈顶、判断应用是否处于前台、获取已安装的所有桌面应用及判断设备是否处于桌面状态等。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

检测某ActivityUpdate是否在当前Task的栈顶

public static boolean isTopActivy(String cmdName, Context context)
    {
        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<RunningTaskInfo> runningTaskInfos = manager.getRunningTasks(Integer.MAX_VALUE);
        String cmpNameTemp = null;
        if (null != runningTaskInfos)
        {
            cmpNameTemp = (runningTaskInfos.get(0).topActivity).toString();
        }

        if (null == cmpNameTemp)
        {
            return false;
        }
        
        return cmpNameTemp.equals(cmdName);

    }

判断Android应用是否在前台

public static boolean isAppOnForeground(Context context)
    {
        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        String packageName = context.getPackageName();
        List<RecentTaskInfo> appTask = activityManager.getRecentTasks(Integer.MAX_VALUE, 1);
        
        if (appTask == null)
        {
            return false;
        }
        
        if (appTask.get(0).baseIntent.toString().contains(packageName))
        {
            return true;
        }
        return false;
    }

获取Android手机内安装的所有桌面

private static List<String> getAllTheLauncher(Context context)
    {
        List<String> names = null;
        PackageManager pkgMgt = context.getPackageManager();
        Intent it = new Intent(Intent.ACTION_MAIN);
        it.addCategory(Intent.CATEGORY_HOME);
        List<ResolveInfo> ra = pkgMgt.queryIntentActivities(it, 0);
        if (ra.size() != 0)
        {
            names = new ArrayList<String>();
        }
        for (int i = 0; i < ra.size(); i++)
        {
            String packageName = ra.get(i).activityInfo.packageName;
            names.add(packageName);
        }
        return names;
    }

Android 判断程序前后台状态

public static boolean isLauncherRunnig(Context context)
    {
        boolean result = false;
        List<String> names = getAllTheLauncher(context);
        ActivityManager mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningAppProcessInfo> appList = mActivityManager.getRunningAppProcesses();
        for (RunningAppProcessInfo running : appList)
        {
            if (running.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND)
            {
                for (int i = 0; i < names.size(); i++)
                {
                    if (names.get(i).equals(running.processName))
                    {
                        result = true;
                        break;
                    }
                }
            }
        }
        return result;
    }

Android系统内部状态信息的相关api：

得到ActivityManager ：

ActivityManager activityManager = (ActivityManager)this.getSystemService(ACTIVITY_SERVICE)

这个位查到底是什么信息：

ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();

获取进程内存状态的信息：

Debug.MemoryInfo[] processMemoryInfo = activityManager.getProcessMemoryInfo(processIds);

获取当前运行的service信息：

List<RunningServiceInfo> runningServiceInfos = activityManager.getRunningServices(MaxValue);

获取当前运行的任务信息：
List<RunningTaskInfo> runningTaskInfos = activityManager.getRunningTasks(MaxValue);
其中runningTaskInfos 的 topActivity就是当前Task的活跃Activity
在getRunningTasks()所返回的Task队列中系统会根据这些Task的活跃度有一个排序，越活跃越是靠前。第一个就是当前活动的Task

/**

* 检测某ActivityUpdate是否在当前Task的栈顶

public boolean isTopActivy(String cmdName){
      ActivityManager manager = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE);
      List<RunningTaskInfo> runningTaskInfos = manager.getRunningTasks(1);
      String cmpNameTemp = null;

if(null != runningTaskInfos){

cmpNameTemp=(runningTaskInfos.get(0).topActivity).toString);

Log.e("cmpname","cmpname:"+cmpName);

}

if(null == cmpNameTemp)return false;
return cmpNameTemp.equals(cmdName);

}

最后在应用中添加所需的权限：

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