35蓝牙通信

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2024-08-06 03:27:13 221人阅读

为了学习和测试蓝牙的通信机制，我是把服务器端和客户端分开为两个APP来写的。

一、首先是服务器端：

1、AndroidManifest.xml

添加权限：

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

2、布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/open"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="打开蓝牙" />
    <Button
        android:id="@+id/enable"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="可被检测" />
    <Button
        android:id="@+id/receive"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="打开服务" />
    <TextView
        android:id="@+id/show"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="show"/>

</LinearLayout>

3、Activity

package com.study.bluetooths;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class BluetoothSActivity extends Activity {
	private Button open, enable, receive;
	private TextView show;
	private BluetoothAdapter adapter;
	private Handler handler = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		handler = new Handler() {

			@Override
			public void handleMessage(Message msg) {
				// TODO Auto-generated method stub
				super.handleMessage(msg);
				Toast.makeText(BluetoothSActivity.this, "hello",
						Toast.LENGTH_SHORT).show();
				show.setText(msg.obj.toString());
			}

		};
		open = (Button) findViewById(R.id.open);
		enable = (Button) findViewById(R.id.enable);
		show = (TextView) findViewById(R.id.show);
		receive = (Button) findViewById(R.id.receive);
		adapter = BluetoothAdapter.getDefaultAdapter();
		open.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				if (adapter != null) {
					if (!adapter.isEnabled()) {
						Intent intent = new Intent(
								BluetoothAdapter.ACTION_REQUEST_ENABLE);
						startActivityForResult(intent, 1);
					}
				}
			}
		});
		enable.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				if ((adapter != null) && (adapter.isEnabled())) {
					Intent intent = new Intent(
							BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
					startActivity(intent);
				}
			}
		});
		receive.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				new Thread(new Runnable() {
					public void run() {
						BluetoothServerSocket serverSocket = null;
						BluetoothSocket socket = null;
						BufferedReader in = null;
						try {
							System.out.println("1");
							serverSocket = adapter
									.listenUsingRfcommWithServiceRecord(
											"XIAO",
											UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
							System.out.println("2");
							socket = serverSocket.accept();

							System.out.println("3");
							if (socket != null) {
								InputStream inputStream = socket
										.getInputStream();
								in = new BufferedReader(new InputStreamReader(
										inputStream));
								System.out.println("4");
								// 到这里有一点错误
								String result;
								while (true) {
									if ((result = in.readLine()) != null) {
										Message msg = new Message();
										msg.obj = result;
										handler.sendMessage(msg);
									}
								}

							}
						} catch (IOException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						} finally {
						}
					}
				}).start();
			}
		});
	}
}

二、客户端程序

1、AndroidManifest.xml

权限

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

2、布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/open"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="打開藍牙" />

    <Button
        android:id="@+id/scan"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="掃描藍牙" />

    <Button
        android:id="@+id/send"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="連接發送" />

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

</LinearLayout>

三、Activity

package com.study.bluetoothc;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
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.view.View;
import android.widget.Button;
import android.widget.TextView;

public class BluetoothCActivity extends Activity {
	private Button open, scan, send;
	private TextView show;
	private BluetoothAdapter adapter;
	private BluetoothDevice remoteDevice = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		open = (Button) findViewById(R.id.open);
		scan = (Button) findViewById(R.id.scan);
		send = (Button) findViewById(R.id.send);
		show = (TextView) findViewById(R.id.show);
		adapter = BluetoothAdapter.getDefaultAdapter();
		open.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				if (adapter != null) {
					if (!adapter.isEnabled()) {
						Intent intent = new Intent(
								BluetoothAdapter.ACTION_REQUEST_ENABLE);
						startActivityForResult(intent, 1);
					}
				}
			}
		});

		scan.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				IntentFilter filter = new IntentFilter(
						BluetoothDevice.ACTION_FOUND);
				registerReceiver(receiver, filter);
				if ((adapter != null) && (adapter.isEnabled())) {
					adapter.startDiscovery();
				}
			}
		});

		send.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				new Thread(new Runnable() {
					public void run() {
						if (remoteDevice == null) {
							return;
						}
						BluetoothSocket socket = null;
						try {
							System.out.println(remoteDevice.getName());
							adapter.cancelDiscovery();
							System.out.println("1");
							socket = remoteDevice.createRfcommSocketToServiceRecord(UUID
									.fromString("00001101-0000-1000-8000-00805F9B34FB"));
							System.out.println("2");
							socket.connect();
							System.out.println("3");
							PrintWriter out = new PrintWriter(
									new BufferedWriter(new OutputStreamWriter(
											socket.getOutputStream())), true);
							System.out.println("4");
							out.println("can you se me?");
							System.out.println("5");
						} catch (IOException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						} finally {
							try {
								socket.close();
							} catch (IOException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
						}
					}
				}).start();
			}
		});
	}

	private BroadcastReceiver receiver = new BroadcastReceiver() {

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			String action = intent.getAction();
			if (BluetoothDevice.ACTION_FOUND.equals(action)) {
				BluetoothDevice device = intent
						.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
				if (remoteDevice == null && device.getName().contains("ZTE")) {
					remoteDevice = device;
				}
				show.setText(show.getText() + "\n" + device.getName() + " : "
						+ device.getAddress());
			}
		}
	};
}

三、运行结果：

服务端接收到数据通过handler传递显示：客户端扫描

运行步骤：客户端打开蓝牙，服务器端打开蓝牙，服务器端可被检测，客户端扫描，服务器端打开服务，客户端连接发送

注：本文的配对是通过系统自带的，还有注意代码里的remoteDevice

其它复杂的通信等都可在此基础上进行扩展。此为核心代码。

35蓝牙通信

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35蓝牙通信

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