Android:如何在我的 Activity 中启动电话，然后再返回？

Question

我可以通过Intent发起电话:

    String url = "tel:3334444";
    Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(url));

但它会停留在电话屏幕上。我想要的是留在我的应用程序 Activity 中。是否有可能在后台启动电话？或立即返回到之前的 Activity 。

Answer 1

你需要在你的activity中实现Phonecall状态

////处理手机状态

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) {

       }
      }
     };