源:http://www.cnblogs.com/xiaochao1234/p/3793172.html

上次讲解Android的蓝牙基本用法,这次讲得深入些,探讨下蓝牙方面的隐藏API。用过Android系统设置(Setting)的人都知道蓝牙搜索之后可以建立配对和解除配对,但是这两项功能的函数没有在SDK中给出,那么如何去使用这两项功能呢?本文利用JAVA的反射机制去调用这两项功能对应的函数:createBond和removeBond,具体的发掘和实现步骤如下:

1、使用Git工具下载platform/packages/apps/Settings.git,在Setting源码中查找关于建立配对和解除配对的API,知道这两个API的宿主(BluetoothDevice);

2、使用反射机制对BluetoothDevice枚举其所有方法和常量,看看是否存在:

static public void printAllInform(Class clsShow) {
    try {
        // 取得所有方法
        Method[] hideMethod = clsShow.getMethods();
        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();
    }
}

结果如下:

11-29 09:19:12.012: method name(452): cancelBondProcess 11-29 09:19:12.020: method name(452): cancelPairingUserInput 11-29 09:19:12.020: method name(452): createBond 11-29 09:19:12.020: method name(452): createInsecureRfcommSocket 11-29 09:19:12.027: method name(452): createRfcommSocket 11-29 09:19:12.027: method name(452): createRfcommSocketToServiceRecord 11-29 09:19:12.027: method name(452): createScoSocket 11-29 09:19:12.027: method name(452): describeContents 11-29 09:19:12.035: method name(452): equals 11-29 09:19:12.035: method name(452): fetchUuidsWithSdp 11-29 09:19:12.035: method name(452): getAddress 11-29 09:19:12.035: method name(452): getBluetoothClass 11-29 09:19:12.043: method name(452): getBondState 11-29 09:19:12.043: method name(452): getName 11-29 09:19:12.043: method name(452): getServiceChannel 11-29 09:19:12.043: method name(452): getTrustState 11-29 09:19:12.043: method name(452): getUuids 11-29 09:19:12.043: method name(452): hashCode 11-29 09:19:12.043: method name(452): isBluetoothDock 11-29 09:19:12.043: method name(452): removeBond 11-29 09:19:12.043: method name(452): setPairingConfirmation 11-29 09:19:12.043: method name(452): setPasskey 11-29 09:19:12.043: method name(452): setPin 11-29 09:19:12.043: method name(452): setTrust 11-29 09:19:12.043: method name(452): toString 11-29 09:19:12.043: method name(452): writeToParcel 11-29 09:19:12.043: method name(452): convertPinToBytes 11-29 09:19:12.043: method name(452): getClass 11-29 09:19:12.043: method name(452): notify 11-29 09:19:12.043: method name(452): notifyAll 11-29 09:19:12.043: method name(452): wait 11-29 09:19:12.051: method name(452): wait 11-29 09:19:12.051: method name(452): wait

3、如果枚举发现API存在(SDK却隐藏),则自己实现调用方法:

/**
 * 与设备配对 参考源码:platform/packages/apps/Settings.git
 * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
 */
static public boolean createBond(Class btClass,BluetoothDevice btDevice) throws Exception {
    Method createBondMethod = btClass.getMethod("createBond");
    Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice);
    return returnValue.booleanValue();
}
 
/**
 * 与设备解除配对 参考源码:platform/packages/apps/Settings.git
 * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
 */
static public boolean removeBond(Class btClass,BluetoothDevice btDevice) throws Exception {
    Method removeBondMethod = btClass.getMethod("removeBond");
    Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice);
    return returnValue.booleanValue();
}

PS : SDK之所以不给出隐藏的API肯定有其原因,也许是出于安全性或者是后续版本兼容性的考虑,因此不能保证隐藏API能在所有Android平台上很好地运行。。。

 

本文程序运行效果如下:

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">
    <LinearLayout
        android:id="@+id/LinearLayout01"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent">
        <Button
            android:id="@+id/btnSearch"
            android:layout_width="160dip"
            android:layout_height="wrap_content"
            android:text="Search">
        </Button>
        <Button
            android:id="@+id/btnShow"
            android:layout_height="wrap_content"
            android:layout_width="160dip"
            android:text="Show"
        </Button>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/LinearLayout02"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </LinearLayout>
    <ListView
        android:id="@+id/ListView01"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    </ListView>
</LinearLayout>

工具类ClsUtils.java源码如下:

package com.testReflect;
 
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import android.bluetooth.BluetoothDevice;
import android.util.Log;
 
public class ClsUtils {
 
    /**
     * 与设备配对 参考源码:platform/packages/apps/Settings.git
     * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
     */
    static public boolean createBond(Class btClass, BluetoothDevice btDevice)
            throws Exception {
        Method createBondMethod = btClass.getMethod("createBond");
        Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice);
        return returnValue.booleanValue();
    }
 
    /**
     * 与设备解除配对 参考源码:platform/packages/apps/Settings.git
     * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
     */
    static public boolean removeBond(Class btClass, BluetoothDevice btDevice)
            throws Exception {
        Method removeBondMethod = btClass.getMethod("removeBond");
        Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice);
        return returnValue.booleanValue();
    }
 
    /**
     * 
     * @param clsShow
     */
    static public void printAllInform(Class clsShow) {
        try {
            // 取得所有方法
            Method[] hideMethod = clsShow.getMethods();
            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();
        }
    }
}

主程序testReflect.java的源码如下:

package com.testReflect;
 
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
 
public class testReflect extends Activity {
    Button btnSearch, btnShow;
    ListView lvBTDevices;
    ArrayAdapter<String> adtDevices;
    List<String> lstDevices = new ArrayList<String>();
    BluetoothDevice btDevice;
    BluetoothAdapter btAdapt;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
        btnSearch = (Button) this.findViewById(R.id.btnSearch);
        btnSearch.setOnClickListener(new ClickEvent());
        btnShow = (Button) this.findViewById(R.id.btnShow);
        btnShow.setOnClickListener(new ClickEvent());
 
        lvBTDevices = (ListView) this.findViewById(R.id.ListView01);
        adtDevices = new ArrayAdapter<String>(testReflect.this,
                android.R.layout.simple_list_item_1, lstDevices);
        lvBTDevices.setAdapter(adtDevices);
        lvBTDevices.setOnItemClickListener(new ItemClickEvent());
 
        btAdapt = BluetoothAdapter.getDefaultAdapter();// 初始化本机蓝牙功能
        if (btAdapt.getState() == BluetoothAdapter.STATE_OFF)// 开蓝牙
            btAdapt.enable();
 
        // 注册Receiver来获取蓝牙设备相关的结果
        IntentFilter intent = new IntentFilter();
        intent.addAction(BluetoothDevice.ACTION_FOUND);
        intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
        registerReceiver(searchDevices, intent);
 
    }
 
    private BroadcastReceiver searchDevices = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            Bundle b = intent.getExtras();
            Object[] lstName = b.keySet().toArray();
 
            // 显示所有收到的消息及其细节
            for (int i = 0; i < lstName.length; i++) {
                String keyName = lstName[i].toString();
                Log.e(keyName, String.valueOf(b.get(keyName)));
            }
            // 搜索设备时,取得设备的MAC地址
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                BluetoothDevice device = intent
                        .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
 
                if (device.getBondState() == BluetoothDevice.BOND_NONE) {
                    String str = "未配对|" + device.getName() + "|"
                            + device.getAddress();
                    lstDevices.add(str); // 获取设备名称和mac地址
                    adtDevices.notifyDataSetChanged();
                }
            }
        }
    };
 
    class ItemClickEvent implements AdapterView.OnItemClickListener {
 
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            btAdapt.cancelDiscovery();
            String str = lstDevices.get(arg2);
            String[] values = str.split("//|");
            String address = values[2];
 
            btDevice = btAdapt.getRemoteDevice(address);
            try {
                if (values[0].equals("未配对")) {
                    Toast.makeText(testReflect.this, "由未配对转为已配对", 500).show();
                    ClsUtils.createBond(btDevice.getClass(), btDevice);
                } else if (values[0].equals("已配对")) {
                    Toast.makeText(testReflect.this, "由已配对转为未配对", 500).show();
                    ClsUtils.removeBond(btDevice.getClass(), btDevice);
                }
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
 
    }
 
    /**
     * 按键处理
     * 
     * @author GV
     * 
     */
    class ClickEvent implements View.OnClickListener {
 
        @Override
        public void onClick(View v) {
            if (v == btnSearch) {// 搜索附近的蓝牙设备
                lstDevices.clear();
 
                Object[] lstDevice = btAdapt.getBondedDevices().toArray();
                for (int i = 0; i < lstDevice.length; i++) {
                    BluetoothDevice device = (BluetoothDevice) lstDevice[i];
                    String str = "已配对|" + device.getName() + "|"
                            + device.getAddress();
                    lstDevices.add(str); // 获取设备名称和mac地址
                    adtDevices.notifyDataSetChanged();
                }
                // 开始搜索
                setTitle("本机蓝牙地址:" + btAdapt.getAddress());
                btAdapt.startDiscovery();
            } else if (v == btnShow) {// 显示BluetoothDevice的所有方法和常量,包括隐藏api
                ClsUtils.printAllInform(btDevice.getClass());
            }
 
        }
 
    }
 
}

安卓开发之探秘蓝牙隐藏API(转)的更多相关文章

  1. 安卓开发之探秘蓝牙隐藏API

    上次讲解Android的蓝牙基本用法,这次讲得深入些,探讨下蓝牙方面的隐藏API.用过Android系统设置(Setting)的人都知道蓝牙搜索之后可以建立配对和解除配对,但是这两项功能的函数没有在S ...

  2. Android开发之探秘蓝牙隐藏API

    这次讲得深入些,探讨下蓝牙方面的隐藏API.用过Android系统设置(Setting)的人都知道蓝牙搜索之后可以建立配对和解除配对,但是这两项功能的函数没有在SDK中给出,那么如何去使用这两项功能呢 ...

  3. 探秘蓝牙隐藏API

    上次讲解Android的蓝牙基本用法,这次讲得深入些,探讨下蓝牙方面的隐藏API.用过Android系统设置(Setting)的人都知道蓝牙搜索之后可以建立配对和解除配对,但是这两项功能的函数没有在S ...

  4. Android应用开发中如何使用隐藏API(转)

    一开始需要说明的是,Google之所以要将一些API隐藏(指加上@hide标记的public类.方法或常量)是有原因的.其中很大的原因就是Android系统本身还在不断的进化发展中.从1.0.1.1到 ...

  5. 安卓开发 利用百度识图api进行物体识别

    前文 之前的随笔中,已经通过相机或相册获取到了我们想要的图片,接下来进行识图api的配置工作.我使用的是百度的api,利用python获取信息,并在MainActivity中进行调用来输出信息. 一. ...

  6. 安卓开发 利用百度识图api进行物体识别(java版)

    之前的随笔中,已经实现了python版本调用api接口,之所以使用python是因为python比java要简洁. 但是我发现在使用过程中,chaquopy插件会弹出底部toast显示"un ...

  7. Kotlin 语言高级安卓开发入门

    过去一年,使用 Kotlin 来为安卓开发的人越来越多.即使那些现在还没有使用这个语言的开发者,也会对这个语言的精髓产生共鸣,它给现在 Java 开发增加了简单并且强大的范式.Jake Wharton ...

  8. 安卓开发笔记——TabHost组件(二)(实现底部菜单导航)

    上面文章<安卓开发复习笔记——TabHost组件(一)(实现底部菜单导航)>中提到了利用自定义View(ImageView+TextView)来设置一个底部菜单的样式 这边再补充一种更为灵 ...

  9. 安卓开发开发规范手册V1.0

    安卓开发开发规范手册V1.0 之前发布过一份Web安全开发规范手册V1.0,看到收藏文章的读者挺多,发现整理这些文档还挺有意义. 最近周末抽了些时间把之前收集关于安卓安全开发的资料也整理了一下,整理出 ...

随机推荐

  1. java程序使用memcached

    Memcached是一个高性能的分布式内存对象缓存系统,用于动态Web应用以减轻数据库负载. 1.linux环境下安装与启动memcache: 以编译安装的方式安装.具体参看: http://wang ...

  2. 《LYFvs2013转vs2010》

    <LYFvs2013转vs2010>1.修改解决方案文件(**.sln) 将-------------------------------------------------------- ...

  3. HDU - 5455 Fang Fang

    Problem Description Fang Fang says she wants to be remembered.I promise her. We define the sequence  ...

  4. 如何让linux时间与internet时间同步(centos)

    笔者在使用linux时(虚拟机),经常会发现使用一段时间后,linux时间和我的宿主机(真实机)的时间不一致,而宿主机的时间确实是internet时间,安装linux时选择的时区也是Asia/Shan ...

  5. vhost.sh 源代码,认真看哦

    #!/bin/bash # # Web Server Install Script # Created by wdlinux QQ:12571192 # Url:http://www.wdlinux. ...

  6. 在Firefox浏览器中关闭缓存.命令

    在Firefox中关闭缓存 看看这里 在地址栏输入:about:config 然后在过滤器中输入:browser.cache.disk.enable 解释:When a page is loaded, ...

  7. beego: 获取request参数

    beego提供了一套web开发的框架.但我们在开发过程中遇到了一些问题,现汇总如下. 测试1:测试只有keys数组的情况 func (this *TestController) Index() { k ...

  8. Concepts and Tricks In CNN

    转自:http://blog.cvmarcher.com/posts/2015/05/17/cnn-trick/ 这篇文章主要讲一下Convolutional Neural Network(CNN)里 ...

  9. Ansible6:Playbook简单使用【转】

    ansbile-playbook是一系列ansible命令的集合,利用yaml 语言编写.playbook命令根据自上而下的顺序依次执行.同时,playbook开创了很多特性,它可以允许你传输某个命令 ...

  10. MySQL数据备份和恢复

    1.数据备份 mysqldump -uroot -p databasename > file.sql 2.数据还原 mysql -u root -p databasename < file ...