检查android应用程序是否在前台？ [复制]

我针对这个问题找到了很多答案。但这都是关于单个活动的。如何检查整个应用程序是否在前台运行？

我不明白你想要什么，但你可以检测当前的前台/后台应用程序ActivityManager.getRunningAppProcesses() call.

就像是，

class ForegroundCheckTask extends AsyncTask<Context, Void, Boolean> {

  @Override
  protected Boolean doInBackground(Context... params) {
    final Context context = params[0].getApplicationContext();
    return isAppOnForeground(context);
  }

  private boolean isAppOnForeground(Context context) {
    ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
    if (appProcesses == null) {
      return false;
    }
    final String packageName = context.getPackageName();
    for (RunningAppProcessInfo appProcess : appProcesses) {
      if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
        return true;
      }
    }
    return false;
  }
}

// Use like this:
boolean foregroud = new ForegroundCheckTask().execute(context).get();

如果我理解错了也请告诉我..

UPDATE:看看这个问题从后台任务或服务确定当前前台应用程序 https://stackoverflow.com/questions/2166961/determining-the-current-foreground-application-from-a-background-task-or-service提前了解更多信息..

Thanks..