在Android Locktask模式下执行通话 [英] Perform calls in Android Locktask mode

问题描述

TL; DR如何在使用 Activity.startLockTask()时拨打电话?

TL;DR How to make a phone call while using Activity.startLockTask()?

我正在尝试在Android设备上设置受限制的环境，即通常称为信息亭模式"的内容.

I'm trying to setup a restricted environment on an Android device, i.e. what is usually called "Kiosk-Mode".

官方文档可以在这里找到: https://developer.android.com/work/cosu.html

Official documentation can be found here: https://developer.android.com/work/cosu.html

执行此操作的官方方法建议使用活动.startLockTask .

The official way of doing this suggest to use Activity.startLockTask.

这很好，直到您要从处于 startLockTask()模式的 Activity 中启动其他应用程序为止.启动的任何活动都不得在新任务堆栈上启动，否则系统会阻止启动意图，即否 Intent.FLAG_ACTIVITY_NEW_TASK .

This works fine until you want to start other apps from within your Activity which is in startLockTask() mode. Any activity that launches must not start on a new task stack otherwise the system blocks the launch intent, i.e. no Intent.FLAG_ACTIVITY_NEW_TASK.

某些应用程序只能启动，其他应用程序似乎可以隐式设置此标志，但是可以通过使用 startActivityForResult(...)来解决，该应用程序似乎删除了 NEW_TASK 标志.对于仍然无法正常运行的应用，我可以编写自己的替换代码.

Some apps can just be launched, other seem to implicitly set this flag, but can be workedaround by using startActivityForResult(...) which seems remove the NEW_TASK flag. For apps that still don't work I could code my own replacement.

真正的问题是调用应用程序，该应用程序强制执行新的任务堆栈.触发呼叫会启动呼叫，不会显示呼叫活动，但还会在状态栏中显示呼叫通知(使用 startLockTask()时无法访问该通知).与其他应用程序相比，呼叫应用程序也不能用自定义应用程序替代...

The real issue is the call application, which enforces a new task stack. Triggering a call initiated the call, doesn't show the call activity, but also puts a call notification in the status bar (which is not accessible in while using startLockTask(). In contrast to other apps the call app is also one that can't be replaced with a custom app...

DevicePolicyManager.html.setLockTaskPackages()对此行为没有影响.

推荐答案

我试图在锁定模式下使开始呼叫意图生效，并弹出以下行:

I tried to make start call intent under locked mode and this line pop up:

    system_process E/ActivityManager: Attempted Lock Task Mode violation mStartActivity=ActivityRecord{56ab302 u0 com.android.server.telecom/.components.UserCallActivity t155}

所以我添加

    setLockTaskPackages(<ComponentName>,new String[]{getPackageName(),"com.google.android.dialer","com.android.server.telecom"});

设法使拨号器退出.当然，如果我按下主屏幕按钮或后退按钮，则无法恢复拨号器……尽管最近的按钮仍处于锁定状态.接听电话效果很好(所有按钮均被禁用)

Managed to get the dialler out. Of course if I push the home button or back button, there's no way to get the dialler back... the recent button is still locked though. Receiving call works perfectly (all buttons are disabled)

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