电话录音机
在MainActivity中
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);
}
}
在RecorderService 中
public class RecorderService extends Service {
private MediaRecorder recorder;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
super.onCreate();
//获取电话管理器
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
//监听电话状态
tm.listen(new MyListener(), PhoneStateListener.LISTEN_CALL_STATE);
}
class MyListener extends PhoneStateListener{
//电话状态改变时回调
@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
//判断当前是什么状态
switch (state) {
case TelephonyManager.CALL_STATE_IDLE:
if(recorder != null){
System.out.println("停止录音");
//停止录音
recorder.stop();
//释放录音机占用的资源
recorder.release();
recorder = null;
}
break;
case TelephonyManager.CALL_STATE_RINGING:
if(recorder == null){
recorder = new MediaRecorder();
//设置音频来源
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//设置输出格式
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setOutputFile("sdcard/voice.3gp");
//设置音频编码
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
System.out.println("准备好");
recorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
if(recorder != null){
System.out.println("开始录音");
recorder.start();
}
break;
}
}
}
}
在清单文件中：
<?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"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />3
<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>
</application>
</manifest> 
