拦截来电（来电挂断）

通过监听系统通话状态的改变，来实现拦截来电，但这种拦截方式存在缺陷，会有来电界面显示（包括来电声音和来电界面），原因是时机过晚；并且只有系统apk才能挂断电话。

1.MainActivity.java

package com.tdc.endphone;import android.os.Bundle;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@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.PhoneStatReceiver.java

package com.tdc.endphone;import java.lang.reflect.Method;import android.app.Service;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.telephony.TelephonyManager;import com.android.internal.telephony.ITelephony; public class PhoneStatReceiver extends BroadcastReceiver {TelephonyManager telMgr; @Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubtelMgr = (TelephonyManager) context.getSystemService(Service.TELEPHONY_SERVICE); switch (telMgr.getCallState()) { case TelephonyManager.CALL_STATE_RINGING: endCall(); break; case TelephonyManager.CALL_STATE_OFFHOOK: break; case TelephonyManager.CALL_STATE_IDLE: break; } }private void endCall() { Class<TelephonyManager> c = TelephonyManager.class; try { Method getITelephonyMethod = c.getDeclaredMethod("getITelephony", (Class[]) null); getITelephonyMethod.setAccessible(true); ITelephony iTelephony = null; iTelephony = (ITelephony) getITelephonyMethod.invoke(telMgr, (Object[]) null); iTelephony.endCall(); } catch (Exception e) { }} }

3.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="com.tdc.endphone"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="17" /><uses-permission android:name="android.permission.CALL_PHONE"/> <!-- 读取手机状态的权限 --> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <!-- 读contact的权限 --> <uses-permission android:name="android.permission.READ_CONTACTS" /> <applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid:name="com.tdc.endphone.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><!-- 注册监听手机状态 --> <receiver android:name=".PhoneStatReceiver"> <intent-filter android:priority="1000" > <action android:name="android.intent.action.PHONE_STATE" /> </intent-filter> </receiver></application></manifest>

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