蓝牙

最新推荐文章于 2024-09-22 18:04:07 发布

原创最新推荐文章于 2024-09-22 18:04:07 发布 · 154 阅读

CC 4.0 BY-SA版权

练习

布局

<?xml version="1.0" encoding="UTF-8"?>

<LinearLayout tools:context="com.example.app2.MainActivity" android:layout_height="match_parent" android:orientation="vertical" android:layout_width="match_parent" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:android="http://schemas.android.com/apk/res/android">


    -<LinearLayout android:layout_height="0dp" android:layout_width="match_parent" android:layout_weight="1">

    <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="打开" android:id="@+id/bt_open"/>

    <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="关闭" android:id="@+id/bt_close"/>

    <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="扫描" android:id="@+id/bt_discovery"/>

    <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="已配对" android:id="@+id/bt_bond"/>

</LinearLayout>

    <TextView android:layout_height="wrap_content" android:layout_width="match_parent" android:text="附近的蓝牙设备，点击进行配对" android:background="#e21919"/>

    <ListView android:layout_height="0dp" android:layout_width="match_parent" android:layout_weight="5" android:id="@+id/lv_discovery"/>

    <TextView android:layout_height="wrap_content" android:layout_width="match_parent" android:text="已配对设备，点击发送数据" android:background="#e21919"/>

    <ListView android:layout_height="0dp" android:layout_width="match_parent" android:layout_weight="5" android:id="@+id/lv_bond"/>

</LinearLayout>

开启，关闭，搜索，显示(发送一个字符串)

package com.example.app2;

import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
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.Bundle;
import android.os.Parcelable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Set;
import java.util.UUID;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button bt_open;
    private Button bt_close;
    private Button bt_discovery;
    private Button bt_bond;

    private UUID uuid = UUID.fromString("00001106-0000-1000-8000-00805F9B34FB");//蓝牙通讯规范

    private ListView lv_discovery;
    private ArrayList<BluetoothDevice> list_discovery = new ArrayList<>();
    private MyAdapter myAdapter_discobery;

    private ListView lv_bond;
    private ArrayList<BluetoothDevice> list_bond = new ArrayList<>();
    private MyAdapter myAdapter_bond;

    //BlueToothManager
    private BluetoothManager bluetoothManager ;
    //BlueToothAdapter
    private BluetoothAdapter bluetoothAdapter;

    private MyRecevier myRecevier;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        bt_open = (Button) findViewById(R.id.bt_open);
        bt_close = (Button) findViewById(R.id.bt_close);
        bt_discovery = (Button) findViewById(R.id.bt_discovery);
        bt_bond = (Button) findViewById(R.id.bt_bond);
        lv_discovery = (ListView) findViewById(R.id.lv_discovery);
        lv_bond = (ListView) findViewById(R.id.lv_bond);

        bt_open.setOnClickListener(this);
        bt_close.setOnClickListener(this);
        bt_discovery.setOnClickListener(this);
        bt_bond.setOnClickListener(this);


        //动态获取权限
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
            requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN},100);
        }

        bluetoothManager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        bluetoothAdapter = bluetoothManager.getAdapter();

        myAdapter_discobery = new MyAdapter(list_discovery,this);
        lv_discovery.setAdapter(myAdapter_discobery);

        myAdapter_bond = new MyAdapter(list_bond , this);
        lv_bond.setAdapter(myAdapter_bond);


        //广播注册
         myRecevier = new MyRecevier();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
        registerReceiver(myRecevier,intentFilter);

       //先发起配对
        lv_discovery.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                list_discovery.get(position).createBond();//发起请求
            }
        });

        lv_bond.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                try {
                    BluetoothSocket bluetoothSocket = list_bond.get(position).createInsecureRfcommSocketToServiceRecord(uuid);
                    bluetoothSocket.connect();
                    //发送文字
                    if (bluetoothSocket.isConnected()){
                        bluetoothSocket.getOutputStream().write("这是卤蛋的消息".getBytes());
                    }else {
                        Toast.makeText(MainActivity.this, "链接失败", Toast.LENGTH_SHORT).show();
                    }
                } catch (IOException e) {
                    Toast.makeText(MainActivity.this, "链接失败", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_open:
                open();
                break;
            case R.id.bt_close:
                close();
                break;
            case R.id.bt_discovery:
                discovery();
                break;
            case R.id.bt_bond:
                bond();
                break;
        }
    }

    //查看已经匹配过得
    private void bond() {
        list_bond.clear();
        Set<BluetoothDevice> bondedDevices = bluetoothAdapter.getBondedDevices();
        list_bond.addAll(bondedDevices);
        myAdapter_bond.notifyDataSetChanged();
    }

    //查找周围
    private void discovery() {
        bluetoothAdapter.startDiscovery();
    }

    //关闭
    private void close() {
        bluetoothAdapter.disable();
    }

    //打开
    private void open() {
        Intent intent = new Intent();
        intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);//开启蓝牙
        intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//允许蓝牙被搜索-
        intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,200);//设置规定时间内可以被搜索，可以不设置
        startActivityForResult(intent,100);
    }

    class MyRecevier extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(BluetoothDevice.ACTION_FOUND)){
                BluetoothDevice bd = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                list_discovery.add(bd);
                myAdapter_discobery.notifyDataSetChanged();
            }
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(myRecevier);
    }
}

适配器

package com.example.app2;

import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class MyAdapter extends BaseAdapter {
    private List<BluetoothDevice> list;
    private Context context;
    private LayoutInflater layoutInflater;

    public MyAdapter(List<BluetoothDevice> list, Context context) {
        this.list = list;
        this.context = context;
        layoutInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null){

            holder = new ViewHolder();
            convertView = layoutInflater.inflate(R.layout.item,null);
            holder.textView = convertView.findViewById(R.id.tv);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        holder.textView.setText(list.get(position).getName());
        return convertView;
    }
    class ViewHolder{
        TextView textView;
    }
}

服务端（接收数据）

package com.example.app3;

import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private Button bt;


    private BluetoothAdapter adapter;
    private BluetoothManager manager;
    private UUID uuid = UUID.fromString("00001106-0000-1000-8000-00805F9B34FB");//蓝牙通讯规范
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        bt = (Button) findViewById(R.id.bt);

        manager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        adapter = manager.getAdapter();

        //动态获取权限
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
            requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN},100);
        }
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                server();
            }
        });


    }

    private void server() {
        try {
            BluetoothServerSocket serverSocket = adapter.listenUsingInsecureRfcommWithServiceRecord(adapter.getName(), uuid);
            BluetoothSocket socket = serverSocket.accept();
            Toast.makeText(this, ""+socket.getRemoteDevice().getName()+"链接了我", Toast.LENGTH_SHORT).show();

            InputStream inputStream = socket.getInputStream();
            byte[] bytes = new byte[1024];
            int read = inputStream.read(bytes);
            String message = new String(bytes, 0, read);
            Toast.makeText(this, ""+message, Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}