安卓M：我怎样才能获得当前的前台活动的包名（从服务）

问题描述

有容易得到从在Android L时ActivityManager服务正在运行的任务的列表，并且当前活动任务首先被返回。但是，不要在Android M编辑任何更多的，则返回列表仅包含我的应用程序的任务。有什么办法来解决呢？

我的code：

 名单，其中，ActivityManager.RunningAppProcessInfo＆GT; runningAppProcessInfos = activityManager.getRunningAppProcesses（）;
的for（int i = 0; I＆LT; runningAppProcessInfos.size（）;我++）{
    ActivityManager.RunningAppProcessInfo runningAppProcessInfo = runningAppProcessInfos.get（ⅰ）;
    如果（runningAppProcessInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND）{
        返回runningAppProcessInfo.pkgList [0];
    }
}
 

解决方案

您可以使用下面code和获取当前的前台活动的包名。

 如果（android.os.Build.VERSION.SDK_INT＆GT; = android.os.Build.VERSION_ codeS.LOLLIPOP）{
            UsageStatsManager USM =（UsageStatsManager）getSystemService（usagestats）;
            很长一段时间= System.currentTimeMillis的（）;
            名单＆LT; UsageStats＆GT; APPLIST = usm.queryUsageStats（UsageStatsManager.INTERVAL_DAILY，
                            时间 -  1000 * 1000，时间）;
                    如果（APPLIST =空＆安培;！＆安培; appList.size（）大于0）{
                        SortedMap的＆LT;长，UsageStats＆GT; mySortedMap =新TreeMap的＆LT;长，UsageStats＆GT;（）;
                        对于（UsageStats usageStats：APPLIST）{
                            mySortedMap.put（usageStats.getLastTimeUsed（），
                                    usageStats）;
                        }
                        如果（mySortedMap =空＆安培;！＆安培;！mySortedMap.isEmpty（））{
                            currentApp = mySortedMap.get（
                                    。mySortedMap.lastKey（））getPackageName（）;
                        }
                    }
        } 其他 {
            名单＆LT; ActivityManager.RunningAppProcessInfo＆GT;任务=上午
                            .getRunningAppProcesses（）;
                    currentApp = tasks.get（0）.processName;
        }
 

修改

添加此权限到清单文件。

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.GET_TASKS/＆GT;
＆LT;使用-权限的Andr​​oid：名称=android.permission.PACKAGE_USAGE_STATS工具：忽略=ProtectedPermissions/＆GT;
 

注意

请确保您需要配置自定义您的设备来获得输出设置，您可以设置>安全性>应用程序与使用权限配置它>然后让你的应用程序的权限

It is easy to get a list of running tasks from the ActivityManager service on Android L, and the current active task is returned first. But it don't work on Android M any more, the return list only contains my app task. Is there any way to settle it?

My code:

List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfos = activityManager.getRunningAppProcesses();
for (int i = 0; i < runningAppProcessInfos.size(); i++) {
    ActivityManager.RunningAppProcessInfo runningAppProcessInfo = runningAppProcessInfos.get(i);
    if (runningAppProcessInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
        return runningAppProcessInfo.pkgList[0];
    }
}

解决方案

you can use below code and get the current foreground activity package name.

   if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            UsageStatsManager usm = (UsageStatsManager) getSystemService("usagestats");
            long time = System.currentTimeMillis();
            List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY,
                            time - 1000 * 1000, time);
                    if (appList != null && appList.size() > 0) {
                        SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>();
                        for (UsageStats usageStats : appList) {
                            mySortedMap.put(usageStats.getLastTimeUsed(),
                                    usageStats);
                        }
                        if (mySortedMap != null && !mySortedMap.isEmpty()) {
                            currentApp = mySortedMap.get(
                                    mySortedMap.lastKey()).getPackageName();
                        }
                    }
        } else {
            List<ActivityManager.RunningAppProcessInfo> tasks = am
                            .getRunningAppProcesses();
                    currentApp = tasks.get(0).processName;
        }

Edit

Add this permission in to Manifest file.

<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" tools:ignore="ProtectedPermissions" />

Note

Make sure you need to configure custom setting in your device to obtain the output you can config it with Setting > Security > Apps with usage access > Then enable your app permission

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