Android提高第十四篇之探秘TelephonyManager[转]
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" />
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>
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(); } } }
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); } } }
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