1. 电话拦截

这个功能大家可能都知道了，就是利用反射原理调用ITelephony的隐藏方法来实现。这个就不说了，在附件的代码里有。

2.拦截后提示忙音/空号/已关机/已停机
这个功能其实是要用到MMI指令，具体如何设置呼叫转移的指定可以参考这里 http://baike.baidu.com/view/206402.html?fromTaglist 。
在 本文中我们会用到“遇忙转移”转移的功能。中国移动的设置方式是 **67#电话号码#，取消方式为 ##67#。”无条件转移“用21代替67即可。这两个指令可以直接在手机的拨号界面输入并拨号测试。ITelephony的endcall方法挂断电话 后，会提示电话忙。如果事前设置好了忙时转移到一个空号/已关机/已停机的电话号码，就会提示您拨的电话号码是空号/已关机/已停机。
其实大家可以下载 xxx卫士看下，它设置来电拒接模式后，都是会启动设置MMI指令的界面。然后再去“设置》通话设置》来电转接”，看看 “占线时转接” 设置好的电话号码，就可以知道空号/已关机/已停机对应的电话号码是什么了。

附件是演示工程文件，有几点要说明下：
1. 修改一下BLOCKED_NUMBER这个变量值，把它设置为你要测试拦截的电话号码。
2. 全部功能是在一个Activity里实现的，所以大家要先运行这个Activity，然后点击“设置呼叫转移”，设置好呼叫转移后，不要关闭这个Activity，关了就拦截不了电话了。有心的朋友可以自己去写一个Service在后台运行拦截功能。
实现方式1：
代码如下：

package net.toeach.android.callforwarding;

import java.lang.reflect.Method;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.RemoteException;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;

import com.android.internal.telephony.ITelephony;

/**
* 演示如何设置呼叫转移，拦截电话（拦截后提示为空号）的例子
* @author Tony from ToEach.
* @email wan1976@21cn.com
*/
public class MainActivity extends Activity {
private static final String TAG = MainActivity.class.getSimpleName();

private final static int OP_REGISTER = 100;
private final static int OP_CANCEL = 200;

private final static String BLOCKED_NUMBER = "1892501xxxx";//要拦截的号码
//占线时转移，这里13800000000是空号，所以会提示所拨的号码为空号
private final String ENABLE_SERVICE = "tel:**67*13800000000%23";
//占线时转移
private final String DISABLE_SERVICE = "tel:%23%2367%23";

private IncomingCallReceiver mReceiver;
private ITelephony iTelephony;
private AudioManager mAudioManager;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

findViewById(R.id.btnEnable).setOnClickListener(new OnClickListener(){
public void onClick(View v) {
//设置呼叫转移
Message message = mHandler.obtainMessage();
message.what = OP_REGISTER;
mHandler.dispatchMessage(message);
}
});

findViewById(R.id.btnDisable).setOnClickListener(new OnClickListener(){
public void onClick(View v) {
//取消呼叫转移
Message message = mHandler.obtainMessage();
message.what = OP_CANCEL;
mHandler.dispatchMessage(message);
}
});

mReceiver = new IncomingCallReceiver();
IntentFilter filter = new IntentFilter("android.intent.action.PHONE_STATE");
registerReceiver(mReceiver, filter);// 注册BroadcastReceiver

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

//利用反射获取隐藏的endcall方法
TelephonyManager telephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
try {
Method getITelephonyMethod = TelephonyManager.class.getDeclaredMethod("getITelephony", (Class[]) null);
getITelephonyMethod.setAccessible(true);
iTelephony = (ITelephony) getITelephonyMethod.invoke(telephonyMgr, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}

private Handler mHandler = new Handler() {
public void handleMessage(Message response) {
int what = response.what;
switch(what) {
case OP_REGISTER:{
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse(ENABLE_SERVICE));
startActivity(i);
break;
}
case OP_CANCEL:{
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse(DISABLE_SERVICE));
startActivity(i);
break;
}
}
}
};

private class IncomingCallReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
Log.i(TAG, "State: "+ state);

String number = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
Log.d(TAG, "Incomng Number: " + number);

if(state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_RINGING)){//电话正在响铃
if(number.equals(BLOCKED_NUMBER)){//拦截指定的电话号码
//先静音处理
mAudioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);
Log.d(TAG, "Turn ringtone silent");

try {
//挂断电话
iTelephony.endCall();
} catch (RemoteException e) {
e.printStackTrace();
}

//再恢复正常铃声
mAudioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
}
}
}
}
}

AndroidManifest.xml如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android "
package="net.toeach.android.callforwarding"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MainActivity" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

</application>
<uses-sdk android:minSdkVersion="8" />

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

实现方式2: 代码如下：
1，建立包android.refuseCalling , refuseCalling.java代码如下：
package android.refuseCalling;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.content.Context;
import android.content.Intent;
import android.os.RemoteException;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.TextView;
import com.android.internal.telephony.ITelephony;

public class refuseCalling extends Activity {

private static final String TAG = "Telephony";
private TextView view = null;
private TelephonyManager tManager = null;
private ITelephony iTelephony = null;

//占线时转移，提示所拨的号码为空号
private final String ENABLE_SERVICE = "tel:**67*13800000000%23";
//占线时转移，提示所拨的号码为关机
private final String ENABLE_POWEROFF_SERVICE = "tel:**67*13810538911%23";
//占线时转移，提示所拨的号码为停机
private final String ENABLE_STOP_SERVICE = "tel:**21*13701110216%23";

//占线时转移
private final String DISABLE_SERVICE = "tel:%23%2321%23";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//打开监听电话功能
TelephonyManager mTelephonyMgr = (TelephonyManager) this
.getSystemService(Context.TELEPHONY_SERVICE);
mTelephonyMgr.listen(new TeleListener(),
PhoneStateListener.LISTEN_CALL_STATE);

//gui
view = new TextView(this);
view.setText("listen the state of phone\n");
setContentView(view);

tManager = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
//初始化iTelephony
Class <TelephonyManager> c = TelephonyManager.class;
Method getITelephonyMethod = null;
try {
getITelephonyMethod = c.getDeclaredMethod("getITelephony", (Class[])null);
getITelephonyMethod.setAccessible(true);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

try {
iTelephony = (ITelephony) getITelephonyMethod.invoke(tManager, (Object[])null);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

//启用空号提示
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse(ENABLE_STOP_SERVICE));
startActivity(i);
Log.v(TAG, "启用空号提示");
}

class TeleListener extends PhoneStateListener {

@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
switch (state) {
case TelephonyManager.CALL_STATE_IDLE: {
Log.e(TAG, "CALL_STATE_IDLE");
view.append("CALL_STATE_IDLE " + "\n");
break;
}
case TelephonyManager.CALL_STATE_OFFHOOK: {
Log.e(TAG, "CALL_STATE_OFFHOOK");
view.append("CALL_STATE_OFFHOOK" + "\n");
break;
}
case TelephonyManager.CALL_STATE_RINGING: {
Log.e(TAG, "CALL_STATE_RINGING");
view.append("CALL_STATE_RINGING" + "\n");
try {
iTelephony.endCall();
} catch (RemoteException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
break;
}
default:
break;
}
}
}
protected void onStop() {
super.onStop();
}
protected void onDestroy() {
super.onDestroy();
finish();
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse(DISABLE_SERVICE));
startActivity(i);
}
}
2，建立包android.telephony ，
NeighboringCellInfo.aidl代码如下：
package android.telephony;

3，建立包 com.android.internal.telephony，
ITelephony.aidl代码如下：
/*
*
* Licensed under the android License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.android.internal.telephony;

import android.os.Bundle;
import java.util.List;
import android.telephony.NeighboringCellInfo;
//import com.FrameSpeed.NeighboringCellInfo;

/**
* Interface used to interact with the phone. Mostly this is used by the
* TelephonyManager class. A few places are still using this directly.
* Please clean them up if possible and use TelephonyManager insteadl.
*
* {@hide}
*/
interface ITelephony {

/**
* Dial a number. This doesn't place the call. It displays
* the Dialer screen.
* @param number the number to be dialed. If null, this
* would display the Dialer screen with no number pre-filled.
*/
void dial(String number);

/**
* Place a call to the specified number.
* @param number the number to be called.
*/
void call(String number);

/**
* If there is currently a call in progress, show the call screen.
* The DTMF dialpad may or may not be visible initially, depending on
* whether it was up when the user last exited the InCallScreen.
*
* @return true if the call screen was shown.
*/
boolean showCallScreen();

/**
* Variation of showCallScreen() that also specifies whether the
* DTMF dialpad should be initially visible when the InCallScreen
* comes up.
*
* @param showDialpad if true, make the dialpad visible initially,
* otherwise hide the dialpad initially.
* @return true if the call screen was shown.
*
* @see showCallScreen
*/
boolean showCallScreenWithDialpad(boolean showDialpad);

/**
* End call if there is a call in progress, otherwise does nothing.
*
* @return whether it hung up
*/
boolean endCall();

/**
* Answer the currently-ringing call.
*
* If there's already a current active call, that call will be
* automatically put on hold. If both lines are currently in use, the
* current active call will be ended.
*
* TODO: provide a flag to let the caller specify what policy to use
* if both lines are in use. (The current behavior is hardwired to
* "answer incoming, end ongoing", which is how the CALL button
* is specced to behave.)
*
* TODO: this should be a oneway call (especially since it's called
* directly from the key queue thread).
*/
void answerRingingCall();

/**
* Silence the ringer if an incoming call is currently ringing.
* (If vibrating, stop the vibrator also.)
*
* It's safe to call this if the ringer has already been silenced, or
* even if there's no incoming call. (If so, this method will do nothing.)
*
* TODO: this should be a oneway call too (see above).
* (Actually *all* the methods here that return void can
* probably be oneway.)
*/
void silenceRinger();

/**
* Check if we are in either an active or holding call
* @return true if the phone state is OFFHOOK.
*/
boolean isOffhook();

/**
* Check if an incoming phone call is ringing or call waiting.
* @return true if the phone state is RINGING.
*/
boolean isRinging();

/**
* Check if the phone is idle.
* @return true if the phone state is IDLE.
*/
boolean isIdle();

/**
* Check to see if the radio is on or not.
* @return returns true if the radio is on.
*/
boolean isRadioOn();

/**
* Check if the SIM pin lock is enabled.
* @return true if the SIM pin lock is enabled.
*/
boolean isSimPinEnabled();

/**
* Cancels the missed calls notification.
*/
void cancelMissedCallsNotification();

/**
* Supply a pin to unlock the SIM. Blocks until a result is determined.
* @param pin The pin to check.
* @return whether the operation was a success.
*/
boolean supplyPin(String pin);

/**
* [ASD2-ES1|Connice|2011.04.14]
*/
boolean supplyPuk(String puk, String pin);

/**
* Handles PIN MMI commands (PIN/PIN2/PUK/PUK2), which are initiated
* without SEND (so <code>dial</code> is not appropriate).
*
* @param dialString the MMI command to be executed.
* @return true if MMI command is executed.
*/
boolean handlePinMmi(String dialString);

/**
* Toggles the radio on or off.
*/
void toggleRadioOnOff();

/**
* Set the radio to on or off
*/
boolean setRadio(boolean turnOn);

/**
* Request to update location information in service state
*/
void updateServiceLocation();

/**
* Enable location update notifications.
*/
void enableLocationUpdates();

/**
* Disable location update notifications.
*/
void disableLocationUpdates();

/**
* Enable a specific APN type.
*/
int enableApnType(String type);

/**
* Disable a specific APN type.
*/
int disableApnType(String type);

/**
* Allow mobile data connections.
*/
boolean enableDataConnectivity();

/**
* Disallow mobile data connections.
*/
boolean disableDataConnectivity();

/**
* Report whether data connectivity is possible.
*/
boolean isDataConnectivityPossible();

Bundle getCellLocation();

/**
* Returns the neighboring cell information of the device.
*/
List<NeighboringCellInfo> getNeighboringCellInfo();

int getCallState();
int getDataActivity();
int getDataState();

/**
* Returns the current active phone type as integer.
* Returns TelephonyManager.PHONE_TYPE_CDMA if RILConstants.CDMA_PHONE
* and TelephonyManager.PHONE_TYPE_GSM if RILConstants.GSM_PHONE
*/
int getActivePhoneType();

/**
* Returns the CDMA ERI icon index to display
*/
int getCdmaEriIconIndex();

/**
* Returns the CDMA ERI icon mode,
* 0 - ON
* 1 - FLASHING
*/
int getCdmaEriIconMode();

/**
* Returns the CDMA ERI text,
*/
String getCdmaEriText();

/**
* Returns true if OTA service provisioning needs to run.
* Only relevant on some technologies, others will always
* return false.
*/
boolean needsOtaServiceProvisioning();

/**
* Returns the unread count of voicemails
*/
int getVoiceMessageCount();

/**
* Returns the network type
*/
int getNetworkType();

/**
* Return true if an ICC card is present
*/
boolean hasIccCard();
}

parcelable NeighboringCellInfo;

4，AndroidManifest.xml代码如下：<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.refuseCalling"
android:versionCode="1"
android:versionName="1.0">
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />

<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".refuseCalling"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

</application>
</manifest>

http://blog.csdn.net/liushaogeng/article/details/6592916

http://down.admin5.com/android/117006.html