前面文章介绍了如何使用java的反射机制来调用蓝牙的隐藏api,本文继续来练习java的反射机制,探秘telephonymanager在framework里包含却在sdk隐藏的几项功能。
先来看一下本文程序运行的效果图,如下所示:
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" />
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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>
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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();
}
}
}
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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);
}
}
}
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感兴趣的读者可以测试一下本文实例代码,希望能够对大家的android项目开发有所帮助。