Android手機通話錄音實現

主要用到了MediaRecorder類，實現代碼如下：

    MediaRecorder mRecorder = new MediaRecorder();

            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);


        File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"ivr_record");  
        if(!dir.exists()){  
            dir.mkdirs();  
        }  

        mFileName = new File(dir,"ivr_"+System.currentTimeMillis()+".3gp").getAbsolutePath();  

        Log.i(TAG, "start recording:"+mFileName);  

        mRecorder.setOutputFile(mFileName);  
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);  

        try {  
            mRecorder.prepare();  
        } catch (IOException e) {  
            Log.e(TAG, "prepare() failed");  
        }  

        mRecorder.start();  </pre> 



 這種方式只能錄自己的語音，對方的語音錄不到，如果想錄對方的語音，只需要將audio source設置成 MediaRecorder.AudioSource.VOICE_CALL就可以了，代碼如下： 

    MediaRecorder mRecorder = new MediaRecorder();

            mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);

            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);


        File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"ivr_record");  
        if(!dir.exists()){  
            dir.mkdirs();  
        }  

        mFileName = new File(dir,"ivr_"+System.currentTimeMillis()+".3gp").getAbsolutePath();  

        Log.i(TAG, "start recording:"+mFileName);  

        mRecorder.setOutputFile(mFileName);  
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);  

        try {  
            mRecorder.prepare();  
        } catch (IOException e) {  
            Log.e(TAG, "prepare() failed");  
        }  

        mRecorder.start();  </pre>