安卓蓝牙通信

2022-08-02 19:01:14



package com.example.bluetoothtest;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
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.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
/***
 * 
 * @author 张章
 *
 */
public class MainActivity extends Activity {
 
	TextView t1,t2,t3;
	EditText et;
	Button but,but2,but3,but4,but5,but6,but7,but8,but9;
	
	ArrayList<BluetoothDevice>deList=new ArrayList<BluetoothDevice>();
	//连接后获取输出流
	OutputStream outputStream;
	BluetoothAdapter bluetooth;
	String uuid="a60f35f0-b93a-11de-8a39-08002009c666";//服务端蓝牙设备的UUID
	Handler handler=new Handler(){
		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			if(msg.what==-1){
				Toast.makeText(getApplicationContext(), "等待用户连接。。。。", 1).show();
			}
			if(msg.what==-2){
				Toast.makeText(getApplicationContext(), "已与用户连接。。。。", 1).show();
			}
			if(msg.what==-3){
				Toast.makeText(getApplicationContext(), "等待服务端接受。。。。", 1).show();
			}
			if(msg.what==-4){
				Toast.makeText(getApplicationContext(), "服务端已接受。。。。", 1).show();
			}
			if(msg.what==1){
				
				Toast.makeText(getApplicationContext(), "接收"+(String)msg.obj, 1).show();
			}
			if(msg.what==2){
				
				Toast.makeText(getApplicationContext(), "发送 "+(String)msg.obj, 1).show();
			}
		}
	};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		t1=(TextView) findViewById(R.id.t1);
		t2=(TextView) findViewById(R.id.t2);
		t3=(TextView) findViewById(R.id.t3);
		et=(EditText) findViewById(R.id.et);
		but=(Button) findViewById(R.id.but);
		but2=(Button) findViewById(R.id.but2);
		but3=(Button) findViewById(R.id.but3);
		but4=(Button) findViewById(R.id.but4);
		but5=(Button) findViewById(R.id.but5);
		but6=(Button) findViewById(R.id.but6);
		but7=(Button) findViewById(R.id.but7);
		but8=(Button) findViewById(R.id.but8);
		but9=(Button) findViewById(R.id.but9);
	    //安卓手机可能有多个蓝牙适配器，目前只能使用默认蓝牙适配器，通过该方法可以获取到默认适配器
		bluetooth=BluetoothAdapter.getDefaultAdapter();
		//启用和禁用BluetoothAdapter是耗时的异步操作，需注册Receiver监听状态变化
		registerReceiver(new MyReceiver(), new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
		//调用startDiscovery()方法可以开启设备扫描，注册该Receiver可以收到扫描状态变化（开始扫描还是结束扫描）
		registerReceiver(new SearchReceiver(), new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED));
		registerReceiver(new SearchReceiver(), new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED));
		//调用startDiscovery()方法可以开启设备扫描，注册该Receiver可以收到扫描到的设备
		//通过(BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)
		//可以获得扫描到的设备
		registerReceiver(new SearchDeviceReceiver(), new IntentFilter(BluetoothDevice.ACTION_FOUND)); 
		but.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				if(bluetooth.setName(et.getText().toString())){
					Toast.makeText(getApplicationContext(), "设置成功", 1).show();
				}else
					Toast.makeText(getApplicationContext(), "设置失败", 1).show();
			}
		});
		//加入	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>权限
		//后可以直接使用enable()方法启动本机蓝牙适配器，并且可以修改蓝牙友好名称
		but2.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				bluetooth.enable();
			}
		});
		//使用下面语句可以弹出对话框提示是否开启，onActivityResult()方法可获取用户选项
		but3.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE),1);
			}
		});
		but4.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				if(bluetooth.isEnabled()){
					t1.setText("地址"+bluetooth.getAddress());
					t2.setText("名称"+bluetooth.getName());
					t3.setText("可见性"+bluetooth.getScanMode());
				}else
					Toast.makeText(getApplicationContext(), "蓝牙不可用", 1).show();	
			}
		});
		//修改本机蓝牙可见时间
		but5.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
				intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 1200);
				startActivityForResult(intent, 2);
			}
		});
		but6.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				if(bluetooth.isEnabled()){
					deList.clear();
					bluetooth.startDiscovery();
				}
			}
		});
		but7.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				createServer();
			}

		});
		
		but8.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				linktoServer();
			}

		});
		
		but9.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				send();
			}
			
		});
		
	
		
	}

	private void linktoServer() {
		 try {
			BluetoothDevice bluetoothDevice=deList.get(0);
			bluetoothDevice.getAddress();
			final BluetoothSocket bluetoothSocket=bluetoothDevice.createRfcommSocketToServiceRecord(UUID.fromString(uuid));
			new Thread(){
				@Override
				public void run() {
					try {
						handler.sendEmptyMessage(-3);
						bluetoothSocket.connect();
						handler.sendEmptyMessage(-4);
						outputStream=bluetoothSocket.getOutputStream();
						getInfo(bluetoothSocket);
						
					} catch (Exception e) {
						e.printStackTrace();
					}
				};
			}.start();
			
		} catch (Exception e) {
		
			e.printStackTrace();
		}
	}
	//创建服务端，类似于Socket编程
	private void createServer()  {
		try {
			final BluetoothServerSocket btserver = bluetooth.listenUsingRfcommWithServiceRecord("server", UUID.fromString(uuid));
			new Thread(){
				@Override
				public void run() {
					
					try {
						while(true){
							handler.sendEmptyMessage(-1);
							final BluetoothSocket serverSocket = btserver.accept();//阻塞式方法，需开线程
							handler.sendEmptyMessage(-2);
							outputStream=serverSocket.getOutputStream();
							new Thread(){//当有新连接时，交给新线程完成
								public void run() {
									getInfo(serverSocket);
								};
							}.start();
						}
					} catch (Exception e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
				};
			}.start();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
	private void send() {
		String ss=et.getText().toString().trim();
		
		try {
			BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(outputStream));
			bw.write(ss);
			bw.newLine();//注意换行
			bw.flush();//刷新缓存
			Message msg=new Message();
			msg.obj=ss;
			msg.what=2;
			handler.sendMessage(msg);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void getInfo(BluetoothSocket serverSocket) {

		try {
			InputStream inputStream=serverSocket.getInputStream();
			BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
			while(true){
				String msg=br.readLine();
				Message msgs=new Message();
				msgs.obj=msg;
				msgs.what=1;
				handler.sendMessage(msgs);
				
			}
		} catch (IOException e) {
		}
	}
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		
		super.onActivityResult(requestCode, resultCode, data);
		if(requestCode==1&&resultCode==RESULT_OK){
			Toast.makeText(getApplicationContext(), "蓝牙已启用（onActivityResult）", 1).show();
		}
		if(requestCode==2&&resultCode!=RESULT_CANCELED){
			Toast.makeText(getApplicationContext(), "蓝牙可见时间已修改"+requestCode+"（onActivityResult）", 1).show();
		}
		
	}
	
	private class MyReceiver extends BroadcastReceiver{

		@Override
		public void onReceive(Context arg0, Intent intent) {
			int state=intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);
			if(state==BluetoothAdapter.STATE_TURNING_ON)
				Toast.makeText(getApplicationContext(), "蓝牙正在开启", 1).show();
			if(state==BluetoothAdapter.STATE_ON)
				Toast.makeText(getApplicationContext(), "蓝牙已经开启", 1).show();
			if(state==BluetoothAdapter.STATE_TURNING_OFF)
				Toast.makeText(getApplicationContext(), "蓝牙正在关闭", 1).show();
			if(state==BluetoothAdapter.STATE_OFF)
				Toast.makeText(getApplicationContext(), "蓝牙已关闭", 1).show();
		}
		
	}
	private class SearchReceiver extends BroadcastReceiver{
		
		@Override
		public void onReceive(Context arg0, Intent intent) {
			if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(intent.getAction())){
				Toast.makeText(getApplicationContext(), "启动发现。。。", 1).show();
			}
			if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(intent.getAction())){
				Toast.makeText(getApplicationContext(), "发现结束。。。", 1).show();
				
			}
		}
		
	}
	private class SearchDeviceReceiver extends BroadcastReceiver{
		
		@Override
		public void onReceive(Context arg0, Intent intent) {
			et.append(intent.getStringExtra(BluetoothDevice.EXTRA_NAME)+"\n");
			Toast.makeText(getApplicationContext(), intent.getStringExtra(BluetoothDevice.EXTRA_NAME), 1).show();
			try{
				deList.add((BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE));
				Toast.makeText(getApplicationContext(), "发现设备", 1).show();
			}catch(Exception e){}
			
		}
		
	}

}







布局文件如下


<pre name="code" class="html"><ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
	
	 >
<LinearLayout 
     android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
    <TextView
        android:id="@+id/t1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="t1" />

    <TextView
        android:id="@+id/t2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="t2" />

    <TextView
        android:id="@+id/t3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="t3" />

    <EditText 
         android:id="@+id/et"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:id="@+id/but"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置名称" />

    <Button
        android:id="@+id/but2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="自动开启" />

    <Button
        android:id="@+id/but3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提示开启" />

    <Button
        android:id="@+id/but4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="获取信息" />

    <Button
        android:id="@+id/but5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="修改可见性" />

    <Button
        android:id="@+id/but6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="查找设备" />

    <Button
        android:id="@+id/but7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="创建服务端" />

    <Button
        android:id="@+id/but8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="连接到服务端" />
    <Button
        android:id="@+id/but9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="发送" />

</LinearLayout>
</ScrollView>








manifest文件




<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bluetoothtest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.bluetoothtest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
	<uses-permission android:name="android.permission.BLUETOOTH"/>
	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
</manifest>






安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信安卓蓝牙通信


注意：安卓手机A，安卓手机B都要安装这款软件，并都点击 提示开启（或自动开启），接着安卓手机A点击  修改可见性  并点击  创建服务端  ，安卓手机B点击查找设备，若找到的第一个设备为安卓手机A，B手机点击   链接到服务端  ，等提示  已经连接   后就可以在文本框中输入文字，然后点击   发送   了

请安装到手机上使用！





工程下载地址   http://pan.baidu.com/s/1eQ3nc3o








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安卓蓝牙通信
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