蓝牙入门代码

1.MyAdapter代码

/** * Created by wangcaiwen on 2017/8/15. */public class MyAdapter extends BaseAdapter {    private ArrayList<BluetoothDevice> mList;    private Context context;    public MyAdapter(ArrayList<BluetoothDevice> mList, Context context) {        this.mList = mList;        this.context = context;    }    @Override    public int getCount() {        return mList.size();    }    @Override    public Object getItem(int i) {        return mList.get(i);    }    @Override    public long getItemId(int i) {        return i;    }    @Override    public View getView(int i, View view, ViewGroup viewGroup) {        ViewHolder holder=null;if(view==null) {    view = View.inflate(context, R.layout.item, null);    holder=new ViewHolder();    holder.tv_address=view.findViewById(R.id.tv_address);    holder.tv_name=view.findViewById(R.id.tv_name);    holder.tv_state=view.findViewById(R.id.tv_state);    view.setTag(holder);}else{   holder = (ViewHolder) view.getTag();}//设置值        BluetoothDevice device= (BluetoothDevice) getItem(i);        holder.tv_address.setText(device.getAddress());        holder.tv_name.setText(device.getName());        int state = device.getBondState();        switch (state){            case BluetoothDevice.BOND_BONDED:                holder.tv_state.setText("已配对");                break;            case BluetoothDevice.BOND_NONE:                holder.tv_state.setText("未配对");                break;            case BluetoothDevice.BOND_BONDING:                holder.tv_state.setText("正在配对");                break;        }        return view;    }    class ViewHolder{        public TextView tv_address;        public TextView tv_name;        public TextView tv_state;    }}

2.activity代码

public class MainActivity extends AppCompatActivity {    private ListView lv;    private ArrayList<BluetoothDevice> mList;    private BluetoothAdapter mBlueAdapter;    private MyAdapter ma;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        initData();        //注册广播接收器,用于接受蓝牙相关的广播        registerBlueToothReceiver();    }    /**     * 注册蓝牙广播     */    private void registerBlueToothReceiver() {    }    /**     * 初始化数据     */    private void initData() {        mList = new ArrayList<>();        mBlueAdapter = BluetoothAdapter.getDefaultAdapter();        mBlueAdapter.enable();    }    /**     * 初始化控件     */    private void initView() {        lv = (ListView) findViewById(R.id.lv);    }    /**     * 扫描设备     * @param v     */    public void scan(View v){        searchBondedDevice();        searchUnBondedDevice();        setAdapter();    }    /**     * 设置适配器,刷新数据     */    private void setAdapter() {        if(ma==null){            ma = new MyAdapter(mList,MainActivity.this);            lv.setAdapter(ma);        }else{            ma.notifyDataSetChanged();        }    }    /**     * 搜索未配对的设备     */    private void searchUnBondedDevice() {        if(mBlueAdapter.isDiscovering()){            mBlueAdapter.cancelDiscovery();        }        mBlueAdapter.startDiscovery();    }    /**     * 搜索已配对的设备     */    private void searchBondedDevice() {        Set<BluetoothDevice> bondedDevices = mBlueAdapter.getBondedDevices();        for (BluetoothDevice bd : bondedDevices) {            if(!mList.contains(bd)){                mList.add(bd);            }        }    }    /**     * 广播接收器     */    class MyReceiver extends BroadcastReceiver{        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            //蓝牙设备           BluetoothDevice device= intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);            //发现蓝牙设备的逻辑            if(action.equals(BluetoothDevice.ACTION_FOUND)){                    //是否包含此设备                if(!mList.contains(device)){                    mList.add(device);                }                //刷新数据                setAdapter();                //蓝牙状态监听            }else if(action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){                //得到蓝牙状态                int bondState = device.getBondState();                switch(bondState){                    case BluetoothDevice.BOND_BONDED:                       mList.remove(device);                        mList.add(0,device);                        setAdapter();                        break;                    case BluetoothDevice.BOND_BONDING:                        Toast.makeText(MainActivity.this, "正在配对...", Toast.LENGTH_SHORT).show();                        break;                    case BluetoothDevice.BOND_NONE:                        Toast.makeText(MainActivity.this, "未配对", Toast.LENGTH_SHORT).show();                        break;                }            }        }    }}