用户 ActivityManager 在 Android 中排名靠前 Activity 的正确方法是什么？

Question

我的自定义启动器使用以下代码来识别顶部 activity，我与一些允许的应用程序进行比较运行。

private void restoreApp() {
    ctx = this;
    am = (ActivityManager) getBaseContext().getSystemService(Context.ACTIVITY_SERVICE);

    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
      activePackages = getActivePackages();
    } else {
      activePackages = getActivePackagesCompat();
    }
    Log.i(TAG, "restoreApp() -> ");
    Boolean testPackage  = false;
    if (activePackages != null) {
      for (String activePackage : activePackages) {
        Log.i(TAG, "testing  -> "+activePackage);
        if(!activePackage.contains("com.estapar.mobile.launcher")){
          if (allowedApps.testApp(activePackage)) {
            restoreAppExec(activePackage);
            testPackage = true;
            Log.i(TAG, "restoring  -> "+activePackage);
          }
        }
      }
      if(!testPackage){
        restoreAppExec("launcher");
      }
    }
    else{
      Log.i(TAG, "activePackages eh nulo");
    }
  }

  String[] getActivePackagesCompat() {
    final List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
    final ComponentName componentName = taskInfo.get(0).topActivity;
    final String[] activePackages = new String[1];
    activePackages[0] = componentName.getPackageName();
    return activePackages;
  }

  String[] getActivePackages() {
    final Set<String> activePackages = new HashSet<String>();
    final List<ActivityManager.RunningAppProcessInfo> processInfos = am.getRunningAppProcesses();

    String mpackageName = am.getRunningTasks(1).get(0).topActivity.getPackageName();
    String mPackageName2 = am.getRunningAppProcesses().get(0).processName;

    Log.i("asd",mpackageName);
    Log.i("asd",mPackageName2);
    for (ActivityManager.RunningAppProcessInfo processInfo : processInfos) {
      if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
        activePackages.addAll(Arrays.asList(processInfo.pkgList));
      }
    }
    return activePackages.toArray(new String[activePackages.size()]);
  }

但在 Android 版本 5.1.1 中它停止工作 =(，总是返回启动程序包。

有人知道在这个 android 版本中使用这种方法的正确方法吗？

谢谢。

Answer 1

根据 android 文档

，这不再可能了

This method was deprecated in API level 21. As of LOLLIPOP, this method is no longer available to third party applications: the introduction of document-centric recents means it can leak person information to the caller. For backwards compatibility, it will still retu rn a small subset of its data: at least the caller's own tasks, and possibly some other tasks such as home that are known to not be sensitive.

用户 ActivityManager 在 Android 中排名靠前 Activity 的正确方法是什么？

Which is the Correct way to user ActivityManager to get top Activity in Android?

android

android-service

android-activity

android-launcher