android88 录音机

package com.itheima.recorder;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

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 click(View v){

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

        startService(intent);

    }

}

package com.itheima.recorder;

import java.io.IOException;

import android.app.Service;

import android.content.Intent;

import android.media.MediaRecorder;

import android.os.IBinder;

import android.telephony.PhoneStateListener;

import android.telephony.TelephonyManager;

public class RecorderService extends Service {

    private MediaRecorder recorder;//录音api

    @Override

    public IBinder onBind(Intent intent) {

        return null;

    }

    @Override

    public void onCreate() {

        super.onCreate();

        //拿到电话管理器

        TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);

        //监听电话状态

        //events:决定PhoneStateListener侦听什么内容

        tm.listen(new MyListener(), PhoneStateListener.LISTEN_CALL_STATE);

    }

    class MyListener extends PhoneStateListener{

        //一旦电话状态改变，此方法调用

        @Override

        public void onCallStateChanged(int state, String incomingNumber) {

            super.onCallStateChanged(state, incomingNumber);

            switch (state) {

            case TelephonyManager.CALL_STATE_IDLE:

                System.out.println("空闲");

                if(recorder != null){

                    recorder.stop();

                    recorder.release();//使用硬件录音是用c语言占用资源是不会自动释放的需要手动释放

                    recorder = null;

                }

                break;

            case TelephonyManager.CALL_STATE_RINGING:

                System.out.println("响铃");

                if(recorder == null){

                    recorder = new MediaRecorder();

                    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//音频来源麦克风

                    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

                    recorder.setOutputFile("sdcard/luyin.3gp");//输出文件路径

                    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置音频编码

                    try {

                        recorder.prepare();

                    } catch (Exception e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                    }

                }

                break;

            case TelephonyManager.CALL_STATE_OFFHOOK:

                System.out.println("摘机");

                //开始录音

                if(recorder != null){

                    recorder.start();

                }

                break;

            }

        }

    }

}

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.itheima.recorder"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>  读取电话状态

  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 写sd卡权限

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

  <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>获取开机启动

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.itheima.recorder.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service android:name="com.itheima.recorder.RecorderService"></service>

        <receiver android:name="com.itheima.recorder.BootReceiver">

            <intent-filter >

                <action android:name="android.intent.action.BOOT_COMPLETED"/>开机广播接收者

            </intent-filter>

        </receiver>

    </application>

</manifest>