Android提高第十四篇之探秘TelephonyManager

上次介绍了如何使用JAVA的反射机制来 调用蓝牙的隐藏API ，这次继续练习JAVA的反射机制，探秘TelephonyManager在Framework里包含却在SDK隐藏的几项功能。先来看看本文程序运行的效果图：

本文程序演示了以下功能：

1.所有来电自动接听；

2.所有来电自动挂断；

3.开启/关闭Radio；

4.开启/关闭数据连接(WAP or NET的连接)。

调 用TelephonyManager的隐藏API是先参考Framework的\base\telephony\java\com\android \internal\telephony\ITelephony.aidl，然后自己实现一个ITelephony.aidl，最后在 TelephonyManager中通过反射机制实例化自定义的ITelephony，实例化之后就可以调用ITelephony里面的函数了。

本文程序需要在AndroidManifest.xml添加以下两行代码，以获得权限：

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

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

main.xml源码如下：

 <? xml   version = "1.0"   encoding = "utf-8" ?>
 < LinearLayout   xmlns:android = "http://schemas.android.com/apk/res/android"
     android:orientation = "vertical"   android:layout_width = "fill_parent"
     android:layout_height = "fill_parent" >
     < RadioGroup   android:layout_height = "wrap_content"
         android:layout_width = "fill_parent"   android:id = "@+id/rGrpSelect" >
         < RadioButton   android:layout_height = "wrap_content"
             android:layout_width = "fill_parent"   android:id = "@+id/rbtnAutoAccept"
             android:text = "所有来电自动接听" > </ RadioButton >
         < RadioButton   android:layout_height = "wrap_content"
             android:layout_width = "fill_parent"   android:id = "@+id/rbtnAutoReject"
             android:text = "所有来电自动挂断" > </ RadioButton >
     </ RadioGroup >
     < ToggleButton   android:layout_height = "wrap_content"
         android:layout_width = "fill_parent"   android:id = "@+id/tbtnRadioSwitch"
         android:textOn = "Radio已经启动"   android:textOff = "Radio已经关闭"
         android:textSize = "24dip"   android:textStyle = "normal" > </ ToggleButton >
     < ToggleButton   android:layout_height = "wrap_content"
         android:layout_width = "fill_parent"   android:id = "@+id/tbtnDataConn"
         android:textSize = "24dip"   android:textStyle = "normal"   android:textOn = "允许数据连接"
         android:textOff = "禁止数据连接" > </ ToggleButton >
 </ LinearLayout >

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <RadioGroup android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/rGrpSelect"> <RadioButton android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/rbtnAutoAccept" android:text="所有来电自动接听"></RadioButton> <RadioButton android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/rbtnAutoReject" android:text="所有来电自动挂断"></RadioButton> </RadioGroup> <ToggleButton android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/tbtnRadioSwitch" android:textOn="Radio已经启动" android:textOff="Radio已经关闭" android:textSize="24dip" android:textStyle="normal"></ToggleButton> <ToggleButton android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/tbtnDataConn" android:textSize="24dip" android:textStyle="normal" android:textOn="允许数据连接" android:textOff="禁止数据连接"></ToggleButton> </LinearLayout>

PhoneUtils.java是手机功能类，从TelephonyManager中实例化ITelephony并返回，源码如下：

 package  com.testTelephony;

 import  java.lang.reflect.Field;
 import  java.lang.reflect.Method;
 import  com.android.internal.telephony.ITelephony;
 import  android.telephony.TelephonyManager;
 import  android.util.Log;

 public   class  PhoneUtils {
     /**
      * 从TelephonyManager中实例化ITelephony，并返回
      */
     static   public  ITelephony getITelephony(TelephonyManager telMgr)  throws  Exception {
         Method getITelephonyMethod = telMgr.getClass().getDeclaredMethod("getITelephony" );
         getITelephonyMethod.setAccessible(true ); //私有化函数也能使用
         return  (ITelephony)getITelephonyMethod.invoke(telMgr);
     }

     static   public   void  printAllInform(Class clsShow) {
         try  {
             // 取得所有方法
             Method[] hideMethod = clsShow.getDeclaredMethods();
             int  i =  0 ;
             for  (; i < hideMethod.length; i++) {
                 Log.e("method name" , hideMethod[i].getName());
             }
             // 取得所有常量
             Field[] allFields = clsShow.getFields();
             for  (i =  0 ; i < allFields.length; i++) {
                 Log.e("Field name" , allFields[i].getName());
             }
         } catch  (SecurityException e) {
             // throw new RuntimeException(e.getMessage());
             e.printStackTrace();
         } catch  (IllegalArgumentException e) {
             // throw new RuntimeException(e.getMessage());
             e.printStackTrace();
         } catch  (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
 }

package com.testTelephony; import java.lang.reflect.Field; import java.lang.reflect.Method; import com.android.internal.telephony.ITelephony; import android.telephony.TelephonyManager; import android.util.Log; public class PhoneUtils { /** * 从TelephonyManager中实例化ITelephony，并返回 */ static public ITelephony getITelephony(TelephonyManager telMgr) throws Exception { Method getITelephonyMethod = telMgr.getClass().getDeclaredMethod("getITelephony"); getITelephonyMethod.setAccessible(true);//私有化函数也能使用 return (ITelephony)getITelephonyMethod.invoke(telMgr); } static public void printAllInform(Class clsShow) { try { // 取得所有方法 Method[] hideMethod = clsShow.getDeclaredMethods(); int i = 0; for (; i < hideMethod.length; i++) { Log.e("method name", hideMethod[i].getName()); } // 取得所有常量 Field[] allFields = clsShow.getFields(); for (i = 0; i < allFields.length; i++) { Log.e("Field name", allFields[i].getName()); } } catch (SecurityException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (IllegalArgumentException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

testTelephony.java是主类，使用PhoneStateListener监听通话状态，以及实现上述4种电话控制功能，源码如下：

 package  com.testTelephony;

 import  android.app.Activity;
 import  android.os.Bundle;
 import  android.telephony.PhoneStateListener;
 import  android.telephony.TelephonyManager;
 import  android.util.Log;
 import  android.view.View;
 import  android.widget.RadioGroup;
 import  android.widget.ToggleButton;

 public   class  testTelephony  extends  Activity {
     /** Called when the activity is first created. */
     RadioGroup rg;//来电操作单选框
     ToggleButton tbtnRadioSwitch;//Radio开关
     ToggleButton tbtnDataConn;//数据连接的开关
     TelephonyManager telMgr;
     CallStateListener stateListner;
     int  checkedId= 0 ;
     @Override
     public   void  onCreate(Bundle savedInstanceState) {
         super .onCreate(savedInstanceState);
         setContentView(R.layout.main);

         telMgr= (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
         telMgr.listen(new  CallStateListener(), CallStateListener.LISTEN_CALL_STATE);

         PhoneUtils.printAllInform(TelephonyManager.class );

         rg = (RadioGroup)findViewById(R.id.rGrpSelect);
         rg.setOnCheckedChangeListener(new  CheckEvent());
         tbtnRadioSwitch=(ToggleButton)this .findViewById(R.id.tbtnRadioSwitch);
         tbtnRadioSwitch.setOnClickListener(new  ClickEvent());
         try  {
             tbtnRadioSwitch.setChecked(PhoneUtils.getITelephony(telMgr).isRadioOn());
         }  catch  (Exception e) {
             Log.e("error" ,e.getMessage());
         }
         tbtnDataConn=(ToggleButton)this .findViewById(R.id.tbtnDataConn);
         tbtnDataConn.setOnClickListener(new  ClickEvent());
         try  {
             tbtnDataConn.setChecked(PhoneUtils.getITelephony(telMgr).isDataConnectivityPossible());
         }  catch  (Exception e) {
             Log.e("error" ,e.getMessage());
         }
     }

     /**
      * 来电时的操作
      * @author GV
      *
      */
     public   class  CheckEvent  implements  RadioGroup.OnCheckedChangeListener{

         @Override
         public   void  onCheckedChanged(RadioGroup group,  int  checkedId) {
             testTelephony.this .checkedId=checkedId;
         }
     }

     /**
      * Radio和数据连接的开关
      * @author GV
      *
      */
     public   class  ClickEvent  implements  View.OnClickListener{

         @Override
         public   void  onClick(View v) {
             if  (v == tbtnRadioSwitch) {
                 try  {
                     PhoneUtils.getITelephony(telMgr).setRadio(tbtnRadioSwitch.isChecked());
                 } catch  (Exception e) {
                     Log.e("error" , e.getMessage());
                 }
             }
             else   if (v==tbtnDataConn){
                 try  {
                     if (tbtnDataConn.isChecked())
                         PhoneUtils.getITelephony(telMgr).enableDataConnectivity();
                     else   if (!tbtnDataConn.isChecked())
                         PhoneUtils.getITelephony(telMgr).disableDataConnectivity();
                 } catch  (Exception e) {
                     Log.e("error" , e.getMessage());
                 }
             }
         }
     }

     /**
      * 监视电话状态
      * @author GV
      *
      */
     public   class  CallStateListener  extends  PhoneStateListener {
         @Override
         public   void  onCallStateChanged( int  state, String incomingNumber) {
             if (state==TelephonyManager.CALL_STATE_IDLE) //挂断
             {
                 Log.e("IDLE" ,incomingNumber);
             }
             else   if (state==TelephonyManager.CALL_STATE_OFFHOOK) //接听
             {
                 Log.e("OFFHOOK" ,incomingNumber);
             }
             else   if (state==TelephonyManager.CALL_STATE_RINGING) //来电
             {
                 if (testTelephony. this .checkedId==R.id.rbtnAutoAccept)
                 {
                     try  {
                         //需要<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
                         PhoneUtils.getITelephony(telMgr).silenceRinger();//静铃
                         PhoneUtils.getITelephony(telMgr).answerRingingCall();//自动接听

                     } catch  (Exception e) {
                         Log.e("error" ,e.getMessage());
                     }
                 }
                 else   if (testTelephony. this .checkedId==R.id.rbtnAutoReject)
                 {
                     try  {
                         PhoneUtils.getITelephony(telMgr).endCall();//挂断
                         PhoneUtils.getITelephony(telMgr).cancelMissedCallsNotification();//取消未接显示
                     } catch  (Exception e) {
                         Log.e("error" ,e.getMessage());
                     }
                 }
             }
             super .onCallStateChanged(state, incomingNumber);
         }
     }
 }