安卓：我怎么可以启动电话在我的活动，然后回吗？ [英] Android: how can I launch phone call in my activity, and then back to it?

问题描述

我可以启动电话按意图：

I can launch the phone call by Intent：

    String url = "tel:[phone]";
    Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(url));

但它会停留在电话屏幕。我要的是住在我的应用程序的活动。是否有可能推出电话在后台？还是马上返回了previous活动。

But it will stay in the phone call screen. What I want is staying at my app activity. Is it possible that launching the phone call in background? Or return to the previous activity immediately.

感谢。

推荐答案

您需要实现您的活动方Phonecall状态

You need to implement Phonecall state in side of your activity

// //处理手机状态

// //Handling phone states

private PhoneStateListener phoneListener = new PhoneStateListener() {
      public void onCallStateChanged(int state, String incomingNumber) {
       try {
        switch (state) {
        case TelephonyManager.CALL_STATE_RINGING:
         Toast.makeText(activity.this, "CALL_STATE_RINGING", Toast.LENGTH_SHORT).show();
         mediaPlayer.pause();
         break;
        case TelephonyManager.CALL_STATE_OFFHOOK:
        Toast.makeText(activity.this, "CALL_STATE_OFFHOOK", Toast.LENGTH_SHORT).show();
         mediaPlayer.pause();
         break;
        case TelephonyManager.CALL_STATE_IDLE:
        Toast.makeText(activity.this, "CALL_STATE_IDLE", Toast.LENGTH_SHORT).show();
         mediaPlayer.start();
         break;
        default:
        Toast.makeText(activity.this, "default", Toast.LENGTH_SHORT).show();

        }
       } catch (Exception e) {

       }
      }
     };  

}

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