蓝牙

//蓝牙权限

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

package news1510a.bawei.com.a04_bluetooth_demo;

 

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.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ListView;

import android.widget.Toast;

 

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.List;

import java.util.Set;

 

public class MainActivity extends AppCompatActivity {

 

    private ListView listView;

    private BluetoothAdapter bluetoothAdapter;

 

    //声明一个list集合,,,泛型是蓝牙设备

    private List<BluetoothDevice> list = new ArrayList<>();

    private MyReceiver myReceiver;

    private ListViewAdapter adapter;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

 

        listView = (ListView) findViewById(R.id.list_view);

 

        //获取蓝牙适配器对象

        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

 

        //首先,如果要操作蓝牙,先判断当前的手机手否存在蓝牙

        if (bluetoothAdapter != null){

            //判断蓝牙是否可用

            if (! bluetoothAdapter.isEnabled()){

 

                //让蓝牙处于可用状态

                bluetoothAdapter.enable();

 

                //bluetoothAdapter.disable();//不可用,关闭

            }

 

        }

 

        myReceiver = new MyReceiver();

        //动态注册一个广播接收者

        IntentFilter filter = new IntentFilter();

 

        //指定广播接收的那个动作...BluetoothDevice.ACTION_FOUND发现了一个蓝牙设备

        filter.addAction(BluetoothDevice.ACTION_FOUND);

 

        //再添加一个动作,,,配对状态改变的时候的动作

        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);

 

        registerReceiver(myReceiver,filter);

 

        //点击条目的时候跟当前未配对的设配进行配对

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                BluetoothDevice bluetoothDevice = list.get(i);

                //没有配对的时候,去配对....使用反射去实现

                if (BluetoothDevice.BOND_NONE == bluetoothDevice.getBondState()){

                    //首先通过MAC地址去获取要配对的设备

                    BluetoothDevice remoteDevice = bluetoothAdapter.getRemoteDevice(bluetoothDevice.getAddress());

 

                    //使用反射去配对

                    try {

                        Method method = BluetoothDevice.class.getMethod("createBond", null);

 

                        method.invoke(remoteDevice,null);

 

                    } catch (Exception e) {

                        e.printStackTrace();

                    }

 

 

                }

 

            }

        });

 

 

    }

 

    //搜索设备的点击事件

    public void searchDevice(View view){

 

        //1.搜索配对过的设备

        searchBoundDevice();

        //2.扫描周边的蓝牙设备

        searchUnboundDevice();

 

        //3.设置适配器

        setAdapter();

    }

 

    /**

     * 给listView设置适配器

     */

    private void setAdapter() {

        if (adapter == null){

 

            adapter = new ListViewAdapter(MainActivity.this, list);

            listView.setAdapter(adapter);

        }else {

            adapter.notifyDataSetChanged();

        }

    }

 

    /**

     * 扫描没有配对的设备

     */

    private void searchUnboundDevice() {

        //如果现在蓝牙正在扫描

        if (bluetoothAdapter.isDiscovering()){//directory目录,文件夹

 

            bluetoothAdapter.cancelDiscovery();//结束当前正在执行的扫描

        }

 

        //开始本次的扫描

        bluetoothAdapter.startDiscovery();//返回值是boolean类型,代表本次扫描是否已经开始

 

 

        //开始扫描之后,,,,一旦扫描到设备之后,,,手机会发送广播,,,所以我们要获取发送过来有关蓝牙设备的信息,需要写一个广播接收者

    }

 

    /**

     * 该方法是:搜索已经配对的设备

     */

    private void searchBoundDevice() {

 

        //获取已经配对的设备,,,返回值是set集合,,泛型就是蓝牙设备

        Set<BluetoothDevice> devices = bluetoothAdapter.getBondedDevices();

 

        for (BluetoothDevice device: devices) {

            //添加到list集合

            if (! list.contains(device)){

                list.add(device);

            }

        }

    }

 

    private class MyReceiver extends BroadcastReceiver{

 

        @Override

        public void onReceive(Context context, Intent intent) {

            //获取传递过来的数据....实际上就是扫描到的蓝牙设备

            BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

 

            //先获取一下当前广播接收的动作

            String action = intent.getAction();

 

            if (action.equals(bluetoothDevice.ACTION_FOUND)){//当前接收者接收的是扫描的广播发出来的信息

                if (! list.contains(bluetoothDevice)){

                    list.add(bluetoothDevice);

                }

 

                //设置适配器

                setAdapter();

            }else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){

                //首先获取到状态....对比状态

                int bondState = bluetoothDevice.getBondState();

                switch (bondState){

                    case BluetoothDevice.BOND_NONE:

                        Toast.makeText(MainActivity.this,"配对失败",Toast.LENGTH_SHORT).show();

                        break;

                    case BluetoothDevice.BOND_BONDING:

                        Toast.makeText(MainActivity.this,"正在配对",Toast.LENGTH_SHORT).show();

 

                        break;

                    case BluetoothDevice.BOND_BONDED:

                        Toast.makeText(MainActivity.this,"配对成功",Toast.LENGTH_SHORT).show();

 

                        list.remove(bluetoothDevice);

                        list.add(0,bluetoothDevice);

 

                        setAdapter();

 

                        break;

                }

            }

        }

    }

 

    @Override

    protected void onDestroy() {

        //在activity销毁的时候注销广播

        if (myReceiver != null){

            unregisterReceiver(myReceiver);

            myReceiver = null;

        }

        super.onDestroy();

    }

}

package news1510a.bawei.com.a04_bluetooth_demo;

 

import android.bluetooth.BluetoothDevice;

import android.content.Context;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

 

import java.util.List;

 

/**

 * @author Dash

 * @date 2017/9/28

 * @description:

 */

public class ListViewAdapter extends BaseAdapter {

    Context context;

    List<BluetoothDevice> list;

 

    public ListViewAdapter(Context context, List<BluetoothDevice> list) {

        this.context = context;

        this.list = list;

    }

 

    @Override

    public int getCount() {

        return list.size();

    }

 

    @Override

    public Object getItem(int i) {

        return list.get(i);

    }

 

    @Override

    public long getItemId(int i) {

        return i;

    }

 

    @Override

    public View getView(int i, View view, ViewGroup viewGroup) {

        ViewHolder holder;

        if (view == null){

            view = View.inflate(context,R.layout.item_layout,null);

            holder = new ViewHolder();

 

            holder.text_name = view.findViewById(R.id.text_name);

            holder.text_address = view.findViewById(R.id.text_address);

            holder.text_state = view.findViewById(R.id.text_state);

 

            view.setTag(holder);

 

        }else {

            holder = (ViewHolder) view.getTag();

        }

 

        BluetoothDevice bluetoothDevice = list.get(i);

 

        holder.text_name.setText(bluetoothDevice.getName());

        holder.text_address.setText(bluetoothDevice.getAddress());

 

        //设置显示是否配对的状态

        int bondState = bluetoothDevice.getBondState();

        switch (bondState){

            case BluetoothDevice.BOND_NONE:

                holder.text_state.setText("未配对");

                break;

            case BluetoothDevice.BOND_BONDING:

                holder.text_state.setText("正在配对");

                break;

            case BluetoothDevice.BOND_BONDED:

                holder.text_state.setText("已经配对");

                break;

        }

 

 

        return view;

    }

 

    //一个蓝牙设备主要的信息:设备的名称,,,设备的地址,,,是否配对一个状态

    private class ViewHolder{

        TextView text_name;

        TextView text_address;

        TextView text_state;

    }

}