android电话录音

1.写一个监听来电消息的服务类， 监听电话、录音、保存录音结果
 

import java.io.File;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.IBinder;
import android.os.Vibrator;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;

public class PhoneService extends Service{
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();

        TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        telephonyManager.listen(new PhoneListener(), PhoneStateListener.LISTEN_CALL_STATE);
    }
    
    private final class PhoneListener extends PhoneStateListener{
        private MediaRecorder mediaRecorder;
        private File file;
        private Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);

        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            try {
                switch (state){
                case TelephonyManager.CALL_STATE_RINGING: //来电
                    Toast.makeText(getApplicationContext(), "来电", Toast.LENGTH_SHORT).show();
                    break;
                    
                case TelephonyManager.CALL_STATE_OFFHOOK: //接通电话
                    file = new File(Environment.getExternalStorageDirectory(), incomingNumber + System.currentTimeMillis() + ".3gp");
                    mediaRecorder = new MediaRecorder();
                    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                    mediaRecorder.setOutputFile(file.getAbsolutePath());
                    mediaRecorder.prepare();
                    mediaRecorder.start();
                    Toast.makeText(getApplicationContext(), "电话已接通，开始录音。", Toast.LENGTH_SHORT).show();        
                    //震动一下
                    vibrator.vibrate(200);
                    break;
                    
                case TelephonyManager.CALL_STATE_IDLE: //挂断电话
                    if (mediaRecorder != null){
                        mediaRecorder.stop();
                        mediaRecorder.release();
                        mediaRecorder = null;
                        Toast.makeText(getApplicationContext(), "电话已挂断，录音停止。", Toast.LENGTH_SHORT).show();
                        //震动一下
                        vibrator.vibrate(200);
                    }
                    break;
                }
            }catch (Exception e) {
                e.printStackTrace();
            }
        }        
    }
}

2.在manifest里面设置权限
 

<!-- 读取电话状态权限 -->
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <!-- SD卡读写权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <!-- 录音权限 -->
    <uses-permission android:name="android.permission.RECORD_AUDIO"/> 
    <!-- 震动权限 -->
    <uses-permission android:name="android.permission.VIBRATE"/>

3.开启监听服务
 

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class XNMainActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		Intent tmpIntent = new Intent(this, PhoneService.class);
        startService(tmpIntent);
        finish();
	}
}