如何以编程方式最小化电话通话？

Question

我有一个应用程序可以调用“帮助调用”。我希望当sombody接受电话时，电话会在后台运行。那么有没有办法让电话最小化，同时回到应用程序？

Answer 1

你可以尝试这样的事情

private class CallStateListener extends PhoneStateListener { 

    @Override 
    public void onCallStateChanged(int state, String incomingNumber) { 
     switch (state) { 
      case TelephonyManager.CALL_STATE_RINGING: { 
       break; 
      } 
      case TelephonyManager.CALL_STATE_OFFHOOK: { 
       try { 
        //THIS WILL SIMULATE A HOME BUTTON PRESS 
        //Effectively Minimizing the In Call Screen 
        Intent startMain = new Intent(Intent.ACTION_MAIN); 
        startMain.addCategory(Intent.CATEGORY_HOME); 
        startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        activity.startActivity(startMain); 

        //Now that you are home, and your In Call Screen is minimized 
        //move back to your application 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
       break; 
      } 
     } 
    } 
}