我怎样才能隐藏一个活动？

Question

我有“下载正在进行文件”对话框活动。当用户按下“隐藏”按钮时，活动将创建通知和隐藏进度对话框。并且当用户单击到通知时,活动显示进度对话框再次出现在活动中。我如何在按下按钮“后退”时切换活动到后退任务？

Answer 1

您需要做的是调用finish()从堆栈中移除活动。然后，在通知中设置在单击时要调用的活动的名称，如下所示：

NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); 
Notification notification = new Notification(R.drawable.icon,
  "A new notification", System.currentTimeMillis());
// Specify the called Activity
Intent intent = new Intent(this, YourActivityName.class);
intent.putBoolean("isDownloading", true); // check this value in Activity
PendingIntent activity = PendingIntent.getActivity(this, 0, intent, 0);
notification.setLatestEventInfo(this, "This is the title",
  "This is the text", activity);
notificationManager.notify(0, notification);