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" />

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
                        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);
        }
    }
}