Android提高第十四篇之探秘TelephonyManager-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_20755/article/details/81991289

本文介绍如何使用Java反射机制调用Android系统中的隐藏API，包括自动接听和挂断来电、控制Radio开关及数据连接等功能。

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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：

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< 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：

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<? 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：

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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：

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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);
}
}
}