在ANDROID中录制外出呼叫和进入呼叫

时间:2014-05-30 06:06:38

标签: android audio android-sdcard mediarecorder

我发现了很多关于这个问题的问题,但我根本不清楚。 我想开发和应用程序,以便它可以记录任何拨出电话和来电。我在下面编写了这段代码,但它没有用。请帮忙详细解释。首先谢谢。

import java.io.File;
import java.io.IOException;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.Environment;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class serviceBroadcast extends BroadcastReceiver {
    Context mycontext;
    final MediaRecorder recorder = new MediaRecorder();
    public void onReceive(Context context, Intent intent) {
        mycontext=context;
        try {
            // TELEPHONY MANAGER class object to register one listner
            TelephonyManager tmgr = (TelephonyManager) context
                    .getSystemService(Context.TELEPHONY_SERVICE);

            //Create Listner
            TeleListener PhoneListener = new TeleListener();

            // Register listener for LISTEN_CALL_STATE
            tmgr.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
        } catch (Exception e) {
            Log.e("Phone Receive Error", " " + e);
        }

    }
    class TeleListener extends PhoneStateListener {
        public void onCallStateChanged(int state, String incomingNumber) {
            super.onCallStateChanged(state, incomingNumber);
            switch (state) {
            case TelephonyManager.CALL_STATE_IDLE:
                StopRecording();
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                startRecording();
                break;
            case TelephonyManager.CALL_STATE_RINGING:
                break;
            default:
                break;
            }

        }
    }
    public void startRecording(){
        recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setOutputFile(Environment.getExternalStorageDirectory()+ "/RecordMyVoice.mp4");
        try {
            recorder.prepare();
            Log.i(this.getClass().getName(), "Prepared");
        } catch (IllegalStateException e) {
            e.printStackTrace();
            Log.i(this.getClass().getName(), "ERR 1");
        } catch (IOException e) {
            e.printStackTrace();
            Log.i(this.getClass().getName(), "ERR 2");
        }
        recorder.start(); 
    }
    public void StopRecording(){
        recorder.stop();          
        recorder.release();
        Log.i(this.getClass().getName(), "Stop Recording");
   }

}

}

1 个答案:

答案 0 :(得分:0)

也许这个答案没有解决你的问题,但它很渴望发表评论。没有看到Logcat很难说,为什么你得到一个异常,但有一点我看到,它可能会给你的release()调用错误。因此,如果您在MediaRecorder对象上调用release(),它将处于null状态,之后无法使用。所以问题是,你打电话给

   final MediaRecorder recorder = new MediaRecorder();

一开始。制作MediaRecorder Global

是一种更好的做法
    private MediaRecorder recorder=null;

并在startRecording()方法中创建Object:

    private void startRecording(){

     recorder = new MediaRecorder();
                .
                .
                .

     }

另外,不要忘记在清单中设置权限:

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