求安卓7实现通话双向录音

Question

如题，即听筒和话筒的声音，我用了设置录音源为AudioSource.MIC 可是只有话筒的声音。 和 VOICE_CALL 很多厂商不支持 求大神指点！最好给出代码，小弟感激不尽

Answer 1

import java.io.File;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
//存储很多张话筒图片的数组
private Drawable[] micImages;
//话筒的图片
private ImageView micImage;

private RelativeLayout recordingContainer;
private TextView recordingHint;
private Button buttonPressToSpeak;
private MediaRecorder recorder=null;
//录音存储在SD卡的路径
private String output_Path=Environment.getExternalStorageDirectory().getAbsolutePath()
        +File.separator+"luyin.3gp";
//录音文件
private File soundFile;
private int BASE = 600;  
private int SPACE = 200;// 间隔取样时间  


 private final Handler mHandler = new Handler(){
     public void handleMessage(android.os.Message msg) {
        int what=msg.what;
        //根据mHandler发送what的大小决定话筒的图片是哪一张
        //说话声音越大,发送过来what值越大
        if(what>13){
            what=13;
        }
         micImage.setImageDrawable(micImages[what]);
     };
 };  
    private Runnable mUpdateMicStatusTimer = new Runnable() {  
        public void run() {  
            updateMicStatus();  
        }  
    };  

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
}

private void init() {
    micImage=(ImageView) findViewById(R.id.mic_image);
    recordingHint=(TextView) findViewById(R.id.recording_hint);
    recordingContainer=(RelativeLayout) findViewById(R.id.recording_container);
    buttonPressToSpeak=(Button) findViewById(R.id.buttonPressToSpeak);
    buttonPressToSpeak.setOnTouchListener(new PressToSpeakListen());
    // 动画资源文件,用于录制语音时
    micImages = new Drawable[] { 
            getResources().getDrawable(R.drawable.record_animate_01),
            getResources().getDrawable(R.drawable.record_animate_02),
            getResources().getDrawable(R.drawable.record_animate_03),
            getResources().getDrawable(R.drawable.record_animate_04),
            getResources().getDrawable(R.drawable.record_animate_05),
            getResources().getDrawable(R.drawable.record_animate_06),
            getResources().getDrawable(R.drawable.record_animate_07),
            getResources().getDrawable(R.drawable.record_animate_08),
            getResources().getDrawable(R.drawable.record_animate_09),
            getResources().getDrawable(R.drawable.record_animate_10),
            getResources().getDrawable(R.drawable.record_animate_11),
            getResources().getDrawable(R.drawable.record_animate_12),
            getResources().getDrawable(R.drawable.record_animate_13),
            getResources().getDrawable(R.drawable.record_animate_14), };

}

/**
 * 按住说话listener
 * 
 */
class PressToSpeakListen implements View.OnTouchListener {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            if (!isExitsSdcard()) { 
                Toast.makeText(MainActivity.this, "未检测到SD卡", Toast.LENGTH_SHORT).show();
                return false;
            }
            if(recorder!=null){
                recorder.stop();
                recorder.release();
                recorder=null;
            }
            soundFile=new File(output_Path);
            recorder=new MediaRecorder();
            recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//声音来源是话筒
            recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置格式
            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置解码方式
            recorder.setOutputFile(soundFile.getAbsolutePath());
            try {
                recorder.prepare();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            recorder.start();
            updateMicStatus();
                recordingContainer.setVisibility(View.VISIBLE);
                recordingHint.setText("手指上滑，取消发送");
                recordingHint.setBackgroundColor(Color.TRANSPARENT);
                return true;
        case MotionEvent.ACTION_MOVE: {
            //在这里只是做了监听，并没有做与发送相关的处理
            if (event.getY() < 0) {
                recordingHint.setText("松开手指，取消发送");
                recordingHint.setBackgroundResource(R.drawable.recording_text_hint_bg);

            } else {
                recordingHint.setText("手指上滑，取消发送");
                recordingHint.setBackgroundColor(Color.TRANSPARENT);

            }
            return true;
        }
        case MotionEvent.ACTION_UP:
            //抬起手指，停止录音
            recordingContainer.setVisibility(View.INVISIBLE);
             stopRecoder();
             Toast.makeText(getApplicationContext(), "录音存储到了"+soundFile.getAbsolutePath(), 1).show();
            return true;
        default:

            return false;
        }
    }
}
private void stopRecoder(){
    if (soundFile != null && soundFile.exists())
    {
        // 停止录音
        recorder.stop();  
        // 释放资源
        recorder.release();  
        recorder = null;
    }
}
 private void updateMicStatus() {  
     if(recorder!=null){
         int ratio = recorder.getMaxAmplitude() / BASE;  
         int db = 0;// 分贝   
         if (ratio > 1)  
             db = (int) (20 * Math.log10(ratio));  
            System.out.println("分贝值："+db+"     "+Math.log10(ratio));  
            //我对着手机说话声音最大的时候，db达到了35左右，
            mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);  
            //所以除了2，为的就是对应14张图片
            mHandler.sendEmptyMessage(db/2);
     }
 }
/**
 * 检测Sdcard是否存在
 * 
 * @return
 */
public  boolean isExitsSdcard() {
    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
        return true;
    else
        return false;
}

}