Android 判断前台应用是否为桌面

最新推荐文章于 2024-08-04 03:34:39 发布

Leo.me

最新推荐文章于 2024-08-04 03:34:39 发布

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CC 4.0 BY-SA版权

文章标签： android

本文链接：https://blog.youkuaiyun.com/qq_34603736/article/details/78962084

本文介绍了一种方法来获取当前使用的桌面包名及前台应用程序的包名，并提供了适用于不同Android版本的代码实现。

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先获取当前使用桌面的包名

因为不同的手机,桌面包名不同

public static String getLauncherPackageName(Context context) {
        final Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_HOME);

        final ResolveInfo res = context.getPackageManager().resolveActivity(intent, 0);
        if (res.activityInfo == null) {
            return "";
        }
        //如果是不同桌面主题，可能会出现某些问题，这部分暂未处理
        if (res.activityInfo.packageName.equals("android")) {
            return "";
        } else {
            return res.activityInfo.packageName;
        }
    }

获取前台应用

针对 Android 5.0 之前

//需要申请权限
<uses-permission android:name="android.permission.GET_TASKS" />

// 通过 running task 获取前台 activity
ActivityManager activityManager = (ActivityManager)context.getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
ComponentName runningTopActivity = activityManager.getRunningTasks(1).get(0).topActivity;

在 Android 5.0 之后上面的接口被废弃了
可以通过 UsageStatsManager 获取

public  String getTopAppPackageName() {
        String packageName = "";
        ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        try {
            if(Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP){
                List<ActivityManager.RunningTaskInfo> rti = activityManager.getRunningTasks(1);
                packageName = rti.get(0).topActivity.getPackageName();
            } else if(Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP) {
                List<ActivityManager.RunningAppProcessInfo> processes = activityManager.getRunningAppProcesses();
                if (processes.size() == 0) {
                    return packageName;
                }
                for (ActivityManager.RunningAppProcessInfo process : processes) {
                    if (process.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                        return process.processName;
                    }
                }
            } else if(Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP){
                final long end = System.currentTimeMillis();
                final UsageStatsManager usageStatsManager = (UsageStatsManager) getSystemService( Context.USAGE_STATS_SERVICE);
                if (null == usageStatsManager) {
                    return packageName;
                }
                final UsageEvents events = usageStatsManager.queryEvents((end - 60 * 1000), end);
                if (null == events) {
                    return packageName;
                }
                UsageEvents.Event usageEvent = new UsageEvents.Event();
                UsageEvents.Event lastMoveToFGEvent = null;
                while (events.hasNextEvent()) {
                    events.getNextEvent(usageEvent);
                    if (usageEvent.getEventType() == UsageEvents.Event.MOVE_TO_FOREGROUND) {
                        lastMoveToFGEvent = usageEvent;
                    }
                }
                if (lastMoveToFGEvent != null) {
                    packageName = lastMoveToFGEvent.getPackageName();
                }
            }
        }catch (Exception ignored){
        }
        return packageName;
    }