我的要求是打开免提每当呼出启动。我尝试以下code，但它不工作。事实上，扬声器打开，当在调用中，第二个电话打进来了！

My requirement is to turn on speakerphone whenever an outgoing call is initiated. I tried the following code, but it is not working. In fact, speakerphone turns on when in the middle of a call, a second call comes !

package in.co.allsolutions;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.util.Log;
//import android.view.View;
import android.widget.Toast;
import android.media.AudioManager;

public class MyTelephonyBroadcastReceiver extends BroadcastReceiver {

      @Override
      public void onReceive(Context context, Intent intent) {

            AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
            audioManager.setSpeakerphoneOn(true);
            Bundle extras = intent.getExtras();            
            if (extras != null) {

                  String state = extras.getString(TelephonyManager.EXTRA_STATE);
                  Log.i("AS", "Message Received. State = " + state + ", Mode = " + audioManager.getMode());
                  //audioManager.setMode(AudioManager.MODE_NORMAL);
                  //audioManager.setSpeakerphoneOn(true);
//                  if (state.equals("OFFHOOK"))
//                  {                  
                  //audioManager.setMode(AudioManager.MODE_CURRENT);
                  //audioManager.setSpeakerphoneOn(true);
                  //audioManager.setMode(AudioManager.MODE_IN_CALL);
                  //audioManager.setSpeakerphoneOn(true);
                  //audioManager.setMode(AudioManager.MODE_RINGTONE);
                  //audioManager.setSpeakerphoneOn(true);
                  if (audioManager.isSpeakerphoneOn()) {
                        Log.i("AS", "Speaker on - SUCCESS.");
                  } else {
                        Log.i("AS", "Speaker could not be turned on.");
                  }
//                  }
            } else {
                  Toast.makeText(context, "Message Received without any state", Toast.LENGTH_LONG).show();
            }
      }
}

感谢。

推荐答案

您可以通过编程方式如下设置：

You can set it through programmatically as below :

AudioManager audioManager = (AudioManager)getApplicationContext().getSystemService(Context.AUDIO_SERVICE); 
audioManager.setMode(AudioManager.MODE_IN_CALL);
audioManager.setSpeakerphoneOn(true);

但是，请记住，不要忘了设置扬声器关闭时，停止呼叫：

But, keep in mind that don't forgot to set speaker off when stop the call:

audioManager.setSpeakerphoneOn(false);

和，清单中设置权限：

  <uses-permission android:name="android.permission.RECORD_AUDIO" />
  <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>

这code是工作的罚款me.hope这将是对你有所帮助。

This code is working fine for me.hope it will be helpful for you.