Android基于AudioManager、PhoneStateListener实现设置黑名单功能

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;    }    });   }  }}