发布于 2017-08-22 11:44:15 | 191 次阅读 | 评论: 0 | 来源: 网友投递
Android移动端操作系统
Android是一种基于Linux的自由及开放源代码的操作系统，主要使用于移动设备，如智能手机和平板电脑，由Google公司和开放手机联盟领导及开发。尚未有统一中文名称，中国大陆地区较多人使用“安卓”或“安致”。
本文实例讲述了Android编程实现通话录音功能的方法。分享给大家供大家参考，具体如下：
因受系统限制，只能录自已麦的声音，录不到对方的声音，可能需要改内核才能实现双向录音；
接通电话和挂断电话时，震动一下；
使用广播接收者实现自启动；
服务代码：
package com.eboy.phoneListener;
import java.io.File;
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.os.Vibrator;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class phoneService extends Service {
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
telephonyManager.listen(new PhoneListener(), PhoneStateListener.LISTEN_CALL_STATE);
}
private final class PhoneListener extends PhoneStateListener{
private MediaRecorder mediaRecorder;
private File file;
private Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
@Override
public void onCallStateChanged(int state, String incomingNumber) {
try {
switch (state){
case TelephonyManager.CALL_STATE_RINGING: //来电
break;
case TelephonyManager.CALL_STATE_OFFHOOK: //接通电话
file = new File(Environment.getExternalStorageDirectory(), incomingNumber + System.currentTimeMillis() + ".3gp");
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mediaRecorder.setOutputFile(file.getAbsolutePath());
mediaRecorder.prepare();
mediaRecorder.start();
Toast.makeText(getApplicationContext(), "电话已接通，开始录音。", Toast.LENGTH_SHORT).show();
//震动一下
vibrator.vibrate(100);
break;
case TelephonyManager.CALL_STATE_IDLE: //挂断电话
if (mediaRecorder != null){
mediaRecorder.stop();
mediaRecorder.release();
mediaRecorder = null;
Toast.makeText(getApplicationContext(), "电话已挂断，录音停止。", Toast.LENGTH_SHORT).show();
//震动一下
vibrator.vibrate(100);
}
break;
}
}catch (Exception e) {
e.printStackTrace();
}
}
}
}
通过广播接收者实现自启动，代码：
package com.eboy.phoneListener;
import android.content.Context;
import android.content.Intent;
public class BroadcastReceiver extends android.content.BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1) {
Intent service = new Intent(arg0, phoneService.class);
arg0.startService(service);
}
}
main.xml：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.eboy.phoneListener"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="15" />
<application android:label="@string/app_name"
android:icon="@drawable/ic_launcher"
android:theme="@style/AppTheme">
<service android:name=".phoneService"></service>
<receiver android:name=".BroadcastReceiver">
<intent-filter >
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
</application>
<!-- 读取电话状态权限 -->
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<!-- SD卡读写权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 录音权限 -->
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<!-- 震动权限 -->
<uses-permission android:name="android.permission.VIBRATE"/>
</manifest>
希望本文所述对大家Android程序设计有所帮助。