在文章的开头先列出以下需要注意的地方：

1、需要用到的权限如下：

<uses-permission android:name="android.permission.READ_PHONE_STATE"/><!--用于读取电话的状态--><uses-permission android:name="android.permission.WRITE_CONTACTS"/><!--用于删除来电记录--><uses-permission android:name="android.permission.CALL_PHONE"/><!--用于挂断电话-->

2、挂断电话所需要用到的类、方法、与包

类：

Class clazz = Class.forName("android.os.ServiceManager");

方法：

Method method = clazz.getMethod("getService", String.class);

包：

所需要用到的包的下载路径为：

下载地址如下：

http://download.csdn.net/detail/caihongshijie6/6282451

代码如下：

在写代码之前先把所需要用到的包导进来。。

1、MainActivity

package com.njupt.endcall1;import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Intent intent = new Intent(this,PhoneService1.class);startService(intent);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

2、PhoneService

package com.njupt.endcall1;import java.lang.reflect.Method;import com.android.internal.telephony.ITelephony;import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.database.ContentObserver;
import android.net.Uri;
import android.os.Handler;
import android.os.IBinder;
import android.provider.CallLog.Calls;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;public class PhoneService1 extends Service {private TelephonyManager tm;private MyPhoneStateListener listener;@Overridepublic void onCreate() {super.onCreate();tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);listener = new MyPhoneStateListener();tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);}private class MyPhoneStateListener extends PhoneStateListener {public MyPhoneStateListener() {}@Overridepublic void onCallStateChanged(int state, String incomingNumber) {super.onCallStateChanged(state, incomingNumber);switch (state) {case TelephonyManager.CALL_STATE_IDLE:break;case TelephonyManager.CALL_STATE_OFFHOOK:break;case TelephonyManager.CALL_STATE_RINGING:endcall(incomingNumber);break;default:break;}}}private void endcall(String incomingNumber) {try {if (incomingNumber.equals("5560")) {Class clazz = Class.forName("android.os.ServiceManager");Method method = clazz.getMethod("getService", String.class);IBinder ibinder =  (IBinder) method.invoke(null, Context.TELEPHONY_SERVICE);ITelephony iTelephony = ITelephony.Stub.asInterface(ibinder);iTelephony.endCall();getContentResolver().registerContentObserver(Calls.CONTENT_URI,true, new MyContentObserver(new Handler(), incomingNumber));}} catch (Exception e) {e.printStackTrace();}}private class MyContentObserver extends ContentObserver{private String incomingNumber;public MyContentObserver(Handler handler , String incomingNumber) {super(handler);this.incomingNumber = incomingNumber;}@Overridepublic void onChange(boolean selfChange) {super.onChange(selfChange);Uri uri = Calls.CONTENT_URI;getContentResolver().delete(uri," number = ? ", new String[]{incomingNumber});getContentResolver().unregisterContentObserver(this);}}@Overridepublic IBinder onBind(Intent intent) {// TODO Auto-generated method stubreturn null;}}

3、AndroidManifest.xml

<uses-permission android:name="android.permission.READ_PHONE_STATE"/><uses-permission android:name="android.permission.WRITE_CONTACTS"/><uses-permission android:name="android.permission.CALL_PHONE"/>

<service android:name="com.njupt.endcall1.PhoneService1"/>