检查棉花糖中的当前前景应用程序

Question

我有一个在后台运行的应用程序，它知道任何内置应用程序（消息，联系人等）何时运行。这个应用程序在android 6下面工作正常。

try {
        ActivityManager am = (ActivityManager) aContext.getSystemService(Context.ACTIVITY_SERVICE);
        PackageManager packageManager = aContext.getPackageManager();
        if (Build.VERSION.SDK_INT > 20) {
            Log.e("VERSION", "+++++++++++++++" + Build.VERSION.SDK_INT);
            String currentProcName = "";
            for (ActivityManager.RunningAppProcessInfo processInfo : am.getRunningAppProcesses()) {
                currentProcName = processInfo.processName;
                ApplicationInfo applicationInfo = packageManager.getApplicationInfo(processInfo.processName, 0);
                String title = (String) ((applicationInfo != null) ? packageManager.getApplicationLabel(applicationInfo) : "???");
                Log.e("show app", "+++++++++++++++" + currentProcName + "---- applicationInfo  " + applicationInfo.uid + "app name  " + title);
                break;
            }
        } else {
            Log.e("VERSION", "===============================" + Build.VERSION.SDK_INT);
            List<ActivityManager.RunningTaskInfo> alltasks = am
                    .getRunningTasks(1);
            for (ActivityManager.RunningTaskInfo aTask : alltasks) {
                String CurrentString = aTask.topActivity.flattenToShortString();
                String[] separated = CurrentString.split("/");
                Log.e("show app", "+++++++++++++++" + "packageName  " + separated[0]);
                ApplicationInfo applicationInfo = packageManager.getApplicationInfo(separated[0], 0);
                final String title = (String) ((applicationInfo != null) ? packageManager.getApplicationLabel(applicationInfo) : "???");
                Log.e("show app", "+++++++++++++++" + "---- applicationInfo  " + applicationInfo.uid + "app name  " + title);
            }
        }
    } catch (Throwable t) {
        Log.e("show", "Throwable caught: " + t.getMessage(), t);
    }

如何在android 6中获取前台应用程序的信息？

许可：

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