举例说明如何在android中实现设置黑名单的功能--AudioManager、PhoneStateListener的使用

手机中一般有设置黑名单的功能。此例通过设置电话黑名单，当黑名单中的电话打来时，手机铃声为变成静音。

程序如下：

import android.app.Activity;

import android.content.Context;

import android.media.AudioManager;

import android.os.Bundle;

import android.telephony.PhoneStateListener;

import android.telephony.TelephonyManager;

import android.view.KeyEvent;

import android.view.View;

import android.view.View.OnKeyListener;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class A11Activity extends Activity {

private EditText et;//添加输入框，输入并设置黑名单

private TextView tv01,tv02; //tv01用来显示EditText中输入的黑名单;tv02用来显示当前手机电话所处的状态

/** Called when the activity is first created. */

@SuppressWarnings("static-access")

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

tv01=(TextView)findViewById(R.id.tv01);

tv02=(TextView)findViewById(R.id.tv02);

et=(EditText)findViewById(R.id.et);

/**创建PhoneCallListener的对象；其中PhoneCallListener是

* 扩展了PhoneStateListener的类*/

PhoneCallListener pcl=new PhoneCallListener();

TelephonyManager tm=(TelephonyManager)getSystemService(TELEPHONY_SERVICE);

//设置监听电话的功能

tm.listen(pcl, pcl.LISTEN_CALL_STATE);

}

public class PhoneCallListener extends PhoneStateListener{

public void onCallStateChanged(int state,String incomingNumber){

switch(state){

//手机状态为待机时，手机铃声为正常模式

case TelephonyManager.CALL_STATE_IDLE:

tv02.setText("CALL_STATE_IDLE");

AudioManager am=(AudioManager)getSystemService(Context.AUDIO_SERVICE);

am.setMode(AudioManager.MODE_NORMAL);

am.getStreamVolume(AudioManager.STREAM_RING);

break;

//手机状态为通话中

case TelephonyManager.CALL_STATE_OFFHOOK:

tv02.setText("CALL_STATE_OFFHOOK");

break;

//手机模式为响铃时

case TelephonyManager.CALL_STATE_RINGING:

tv02.setText("CALL_STATE_RINGING");

//当来电号码与黑名单中的电话号码相同时，设置电话铃声为静音

if(incomingNumber.equals(tv01.getText().toString())){

AudioManager am01=(AudioManager)getSystemService(AUDIO_SERVICE);

am01.setRingerMode(AudioManager.RINGER_MODE_SILENT);

am01.getStreamVolume(AudioManager.STREAM_RING);

Toast.makeText(A11Activity.this, "黑名单中的电话静音！！", Toast.LENGTH_LONG).show();

}

}

super.onCallStateChanged(state, incomingNumber);

et.setOnKeyListener(new OnKeyListener(){

@Override

public boolean onKey(View v, int keyCode, KeyEvent event) {

// TODO Auto-generated method stub

tv01.setText(et.getText());

et.setText("");

return true;

}

});

}

}

}