一、首先在manifest.xml文件中获取监听电话权限，注册监听电话的Activity
1、添加访问手机电话状态的权限
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<receiver android:name=".PhoneReceiver"><intent-filter android:priority="1000"><action android:name="android.intent.action.PHONE_STATE"/><action android:name="android.intent.action.NEW_OUTGOING_CALL" /></intent-filter></receiver>
二、实现过程中主要问题为接口ITelephony，是Android系统Phone类中TelephonyManager提供给上层应用程序用户与telephony进行操作交互的接口。，必须通过AIDL（Android Interface Definition Language,即Android接口定义语言）。
具体操作就是在src文件在新建一个包，包名为：com.android.internal.telephony，在这个包里面新建一个名为ITelephony.aidl ，本文主要通过接口获得endCall()函数来拦截电话。最后rebuild project一下，在android studio 本工程的packets同目录下自动生成ITelephony.java文件
/** Copyright (C) The Android Open Source Project** Licensed under the Apache 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**/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;/*** 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 or go to the Home screen** @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);/*** 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();}
三、主要实现代码
在Activity中import com.android.internal.telephony.ITelephony;就可以使用ITelephony接口
package com.example.administrator.locker2;import java.lang.reflect.Method;import android.app.Service;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.IBinder;import android.telephony.PhoneStateListener;import android.telephony.TelephonyManager;import android.util.Log;import com.android.internal.telephony.ITelephony;public class PhoneReceiver extends BroadcastReceiver {String TAG = "PhoneReceiver";@Overridepublic void onReceive(Context context, Intent intent) {if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)) {// 如果是去电（拨出）} else {TelephonyManager tm = (TelephonyManager) context.getSystemService(Service.TELEPHONY_SERVICE);// 设置一个监听器tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);}}PhoneStateListener listener = new PhoneStateListener() {@Overridepublic void onCallStateChanged(int state, String incomingNumber) {// state 当前状态 incomingNumber,貌似没有去电的APIsuper.onCallStateChanged(state, incomingNumber);switch (state) {//手机空闲了case TelephonyManager.CALL_STATE_IDLE:break;//电话被挂起case TelephonyManager.CALL_STATE_OFFHOOK:break;// 当电话呼入时case TelephonyManager.CALL_STATE_RINGING:Log.e(TAG, "来电号码是："+ incomingNumber);// 如果该号码属于黑名单if (incomingNumber.equals("*********")) {// TODO:如果是黑名单，就进行屏蔽stopCall();}break;}}};public void stopCall() {try {Method method = Class.forName("android.os.ServiceManager").getMethod("getService", String.class);// 获取远程TELEPHONY_SERVICE的IBinder对象的代理IBinder binder = (IBinder) method.invoke(null, new Object[] { "phone" });// 将IBinder对象的代理转换为ITelephony对象ITelephony telephony = ITelephony.Stub.asInterface(binder);// 挂断电话telephony.endCall();//telephony.cancelMissedCallsNotification();} catch (Exception e) {}}}
四、真机测试，当本机开启该应用时，拦截号码拨号方显示您所拨打的电话正在通话中
