参考： 
android 呼入电话的监听（来电监听）
http://stephen830.iteye.com/blog/1181010 
android 呼出电话的监听（去电监听）
http://stephen830.iteye.com/blog/1181452 android-轻松监听来电和去电
http://www.eoeandroid.com/thread-8994-1-1.html   android 呼入电话的监听（来电监听）   需要权限： Xml代码  

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

  方式一：通过广播接收来电   定义来电广播接收类 Java代码  

1. package com.zhouzijing.android.demo;  
2.   
3. import android.content.BroadcastReceiver;  
4. import android.content.Context;  
5. import android.content.Intent;  
6. import android.telephony.TelephonyManager;  
7. import android.util.Log;  
8.   
9. public class BroadcastReceiverMgr extends BroadcastReceiver {  
10.       
11.     private final String TAG = MyBroadcastReceiver.TAG;  
12.   
13.     @Override  
14.     public void onReceive(Context context, Intent intent) {  
15.         String action = intent.getAction();  
16.         Log.i(TAG, "[Broadcast]"+action);  
17.           
18.         //呼入电话  
19.         if(action.equals(MyBroadcastReceiver.B_PHONE_STATE)){  
20.             Log.i(TAG, "[Broadcast]PHONE_STATE");  
21.             doReceivePhone(context,intent);  
22.         }  
23.     }  
24.       
25.     /** 
26.      * 处理电话广播. 
27.      * @param context 
28.      * @param intent 
29.      */  
30.     public void doReceivePhone(Context context, Intent intent) {  
31.         String phoneNumber = intent.getStringExtra(  
32. TelephonyManager.EXTRA_INCOMING_NUMBER);  
33.         TelephonyManager telephony =   
34. (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);  
35.         int state = telephony.getCallState();  
36.         switch(state){  
37.         case TelephonyManager.CALL_STATE_RINGING:  
38.             Log.i(TAG, "[Broadcast]等待接电话="+phoneNumber);  
39.             break;  
40.         case TelephonyManager.CALL_STATE_IDLE:  
41.             Log.i(TAG, "[Broadcast]电话挂断="+phoneNumber);  
42.             break;  
43.         case TelephonyManager.CALL_STATE_OFFHOOK:  
44.             Log.i(TAG, "[Broadcast]通话中="+phoneNumber);  
45.             break;  
46.         }  
47.     }  
48. }  

  定义Actitvity类 Java代码  

1. package com.zhouzijing.android.demo;  
2.   
3. import android.app.Activity;  
4. import android.content.Context;  
5. import android.content.Intent;  
6. import android.content.IntentFilter;  
7. import android.os.Bundle;  
8. import android.telephony.PhoneStateListener;  
9. import android.telephony.TelephonyManager;  
10. import android.util.Log;  
11. import android.view.View;  
12.   
13. public class MyBroadcastReceiver extends Activity {  
14.     public final static String TAG = "MyBroadcastReceiver";  
15.       
16.     public final static String B_PHONE_STATE =   
17. TelephonyManager.ACTION_PHONE_STATE_CHANGED;  
18.       
19.     private BroadcastReceiverMgr mBroadcastReceiver;  
20.       
21.     @Override  
22.     public void onCreate(Bundle savedInstanceState) {  
23.         super.onCreate(savedInstanceState);  
24.         setContentView(R.layout.my_broadcast_receiver);  
25.     }     
26.   
27.     //按钮1-注册广播  
28.     public void registerIt(View v) {  
29.         Log.i(TAG, "registerIt");  
30.         mBroadcastReceiver = new BroadcastReceiverMgr();  
31.         IntentFilter intentFilter = new IntentFilter();  
32.         intentFilter.addAction(B_PHONE_STATE);  
33.         intentFilter.setPriority(Integer.MAX_VALUE);  
34.         registerReceiver(mBroadcastReceiver, intentFilter);  
35.     }  
36.       
37.     //按钮2-撤销广播  
38.     public void unregisterIt(View v) {  
39.         Log.i(TAG, "unregisterIt");  
40.         unregisterReceiver(mBroadcastReceiver);  
41.     }  
42.       
43. }  

  方式二：通过监听器来实现 Java代码  

1. package com.zhouzijing.android.demo;  
2.   
3. import android.app.Activity;  
4. import android.content.Context;  
5. import android.content.Intent;  
6. import android.content.IntentFilter;  
7. import android.os.Bundle;  
8. import android.telephony.PhoneStateListener;  
9. import android.telephony.TelephonyManager;  
10. import android.util.Log;  
11. import android.view.View;  
12.   
13. public class MyBroadcastReceiver extends Activity {  
14.     public final static String TAG = "MyBroadcastReceiver";  
15.       
16.     @Override  
17.     public void onCreate(Bundle savedInstanceState) {  
18.         super.onCreate(savedInstanceState);  
19.         setContentView(R.layout.my_broadcast_receiver);  
20.     }  
21.       
22.     /** 
23.      * 按钮-监听电话 
24.      * @param v 
25.      */  
26.     public void createPhoneListener(View v) {  
27.         TelephonyManager telephony = (TelephonyManager)getSystemService(  
28. Context.TELEPHONY_SERVICE);  
29.         telephony.listen(new OnePhoneStateListener(),  
30. PhoneStateListener.LISTEN_CALL_STATE);  
31.     }  
32.       
33.     /** 
34.      * 电话状态监听. 
35.      * @author stephen