第六单元 蓝牙

蓝牙"/>

第六单元 蓝牙

Day6:蓝牙

一.蓝牙介绍：
二.蓝牙的作用：
三 .蓝牙工作原理以及涉及到的类：
四.代码
服务端线程

一.蓝牙介绍：

是一种无线技术标准，可实现固定设备、移动设备和楼宇个人域网之间的短距离数据交换
添加权限

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android .permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

打开蓝牙并设置允许被搜索

   /*** 开启蓝牙*/public void open(){Intent intent=new Intent();intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);//开始蓝牙intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//允许蓝牙被搜索intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,200);//设置允许被搜索时间200s内可以被搜索到startActivityForResult(intent,100);}

关闭蓝牙

  /*** 关闭蓝牙*/public void close(){adapter.disable();//强制关闭蓝牙}

获得已经配对的蓝牙设备：

/*** 获取配对的消息*/
private void taken() {adapter.getBondedDevices();
}

搜索附近的蓝牙

 /*** 搜索蓝牙*/public void search(){adapter.startDiscovery();//开始扫描}

显示已经搜索到的蓝牙设备 注册广播 定义广播接收者

 /*** 动态获取权限* 判断是不是6.0 requestPermissions（String[]）*/public void init(){String[] string = new String[]{Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN,Manifest.permission.ACCESS_FINE_LOCATION};if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){requestPermissions(string,100);}initMyBlueTooth();//注册广播接收者myReceiver=new MyReceiver();IntentFilter filter=new IntentFilter();filter.addAction(BluetoothDevice.ACTION_FOUND);//注册搜索的广播filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//结束搜索registerReceiver(myReceiver,filter);listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {BluetoothDevice device=devices.get(position);device.createBond();//绑定蓝牙}});}/*** 蓝牙管理者*/public void initMyBlueTooth(){BluetoothManager manager= (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);adapter=manager.getAdapter();//获得自己的牙}class MyReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {//收其搜索到的牙if(intent.getAction().equals(BluetoothDevice.ACTION_FOUND)){BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//                String name = device.getName();
//                Log.i("TAG", "onReceive: "+name);devices.add(device);
//                myAdapter.notifyDataSetChanged();}else if(intent.getAction().equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){//更新适配器,将所有的蓝牙设备显示到界面上myAdapter=new MyAdapter(MainActivity.this,devices);listView.setAdapter(myAdapter);
//                myAdapter.notifyDataSetChanged();}else if(intent.getAction().equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){BluetoothDevice device2 = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);int state=device2.getBondState();switch (state){case BluetoothDevice.BOND_BONDED://发送文件new ClienThrad().start();break;}}}}

MainActivity的完整代码

package com.example.lanya;import android.Manifest;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Environment;
import android.os.Parcelable;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;public class MainActivity extends AppCompatActivity implements View.OnClickListener {private Button open;private Button close;private Button take;private Button search;private ListView listView;private MyAdapter myAdapter;BluetoothAdapter adapter;MyReceiver myReceiver;BluetoothDevice device2;private ArrayList<BluetoothDevice> devices=new ArrayList<>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);open = findViewById(R.id.open);close = findViewById(R.id.close);take = findViewById(R.id.take);search = findViewById(R.id.search);listView=findViewById(R.id.list);init();
//        //开启蓝牙
//        open.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//
//
//            }
//        });
//        //关闭蓝牙
//        close.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                BluetoothAdapter bluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
//                bluetoothAdapter.disable();//强制关闭蓝牙
//            }
//        });
//        take.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//            }
//        });
//        search.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//
//            }
//        });}@Overridepublic void onClick(View v) {if(v.getId()==R.id.open){open();}if(v.getId()==R.id.close){close();}if(v.getId()==R.id.search){search();}if(v.getId()==R.id.take){taken();}}/*** 获取配对的消息*/private void taken() {adapter.getBondedDevices();}/*** 开启蓝牙*/public void open(){Intent intent=new Intent();intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);//开始蓝牙intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//允许蓝牙被搜索intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,200);//设置允许被搜索时间200s内可以被搜索到startActivityForResult(intent,100);}/*** 关闭蓝牙*/public void close(){adapter.disable();//强制关闭蓝牙}/*** 搜索蓝牙*/public void search(){adapter.startDiscovery();//开始扫描}/*** 动态获取权限* 判断是不是6.0 requestPermissions（String[]）*/public void init(){String[] string = new String[]{Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN,Manifest.permission.ACCESS_FINE_LOCATION};if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){requestPermissions(string,100);}initMyBlueTooth();//注册广播接收者myReceiver=new MyReceiver();IntentFilter filter=new IntentFilter();filter.addAction(BluetoothDevice.ACTION_FOUND);//注册搜索的广播filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//结束搜索registerReceiver(myReceiver,filter);listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {BluetoothDevice device=devices.get(position);device.createBond();//绑定蓝牙}});}/*** 蓝牙管理者*/public void initMyBlueTooth(){BluetoothManager manager= (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);adapter=manager.getAdapter();//获得自己的牙}class MyReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {//收其搜索到的牙if(intent.getAction().equals(BluetoothDevice.ACTION_FOUND)){BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//                String name = device.getName();
//                Log.i("TAG", "onReceive: "+name);devices.add(device);
//                myAdapter.notifyDataSetChanged();}else if(intent.getAction().equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){//更新适配器,将所有的蓝牙设备显示到界面上myAdapter=new MyAdapter(MainActivity.this,devices);listView.setAdapter(myAdapter);
//                myAdapter.notifyDataSetChanged();}else if(intent.getAction().equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){BluetoothDevice device2 = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);int state=device2.getBondState();switch (state){case BluetoothDevice.BOND_BONDED://发送文件new ClienThrad().start();break;}}}}class ClienThrad extends Thread{@Overridepublic void run() {super.run();UUID uuid = UUID.fromString("00001106-0000-1000-8000-00805F9B34FB");try {BluetoothSocket socket=device2.createRfcommSocketToServiceRecord(uuid);socket.connect();OutputStream outputStream = socket.getOutputStream();FileInputStream inputStream = new FileInputStream(Environment.getExternalStorageDirectory() + "http.txt");byte[] bytes = new byte[1024];int len=0;while ((len = inputStream.read(bytes)) != -1) {outputStream.write(bytes,0,len);}outputStream.close();inputStream.close();} catch (IOException e) {e.printStackTrace();}}public void receveFromServer(BluetoothSocket socket) {try {InputStream inputStream = socket.getInputStream();byte[] bytes = new byte[1024];int len = 0;FileOutputStream outputStream = new FileOutputStream(Environment.getExternalStorageDirectory().getPath());while ((len = inputStream.read(bytes)) != -1) {outputStream.write(bytes, 0, len);}} catch (IOException e) {e.printStackTrace();}}}//服务器public void createServerSocket(){UUID uuid = UUID.fromString("");try {BluetoothServerSocket serverSocket = adapter.listenUsingInsecureRfcommWithServiceRecord(adapter.getName(), uuid);while (true){BluetoothSocket socket = serverSocket.accept();}} catch (IOException e) {e.printStackTrace();}}}

技能效果：