主代码写

package com.example.phonerecorder;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

public void start(View v){

//开启服务通过intent

Intent intent = new Intent(this,Recordservice.class);

startService(intent);

}

//停止服务通过intent

public void stop(View v){

Intent intent = new Intent(this,Recordservice.class);

stopService(intent);

}

}

Recordservice类要继承Service成为一个服务类

由于是服务所以要在清单中设置

package com.example.phonerecorder;

import android.app.Service;

import android.content.Context;

import android.content.Intent;

import android.os.IBinder;

import android.telephony.PhoneStateListener;

import android.telephony.TelephonyManager;

import android.util.Log;

public class Recordservice extends Service {

@Override

public IBinder onBind(Intent intent) {

// TODO Auto-generated method stub

return null;

}

@Override

public void onCreate() {

Log.e("tag", "开启");

// TODO Auto-generated method stub

super.onCreate();

//创建一个电话管理器的对象(通过这个对象可以监听听电话的状态)

TelephonyManager manager = (TelephonyManager)

getSystemService(Context.TELEPHONY_SERVICE);//传入一个电话服务

//调用电话管理器的listen方法:注册监听

//参数 : 1监听器 2要监听打电话的状态

Listener listener = new Listener();

manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);

}

@Override

public void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

Log.e("tag", "服务被销毁");

}

class Listener extends PhoneStateListener{

//状态改变调用

@Override

public void onCallStateChanged(int state, String incomingNumber) {

// TODO Auto-generated method stub

super.onCallStateChanged(state, incomingNumber);

switch (state) {

case TelephonyManager.CALL_STATE_RINGING:

Log.e("tag","响铃"+incomingNumber+"准备一个录音机");

break;

case TelephonyManager.CALL_STATE_OFFHOOK:

Log.e("tag","接电话了"+incomingNumber+"开始录音");

break;

case TelephonyManager.CALL_STATE_IDLE:

Log.e("tag","空闲状态"+"录音结束");

break;

default:

break;

}

//录音需要用户的权限,在清单中添加READ_PHONE_STATE:读音状态

//

}

}

}

效果图

image.png