Android 蓝牙开发

今天给大家带来蓝牙开发的基础，主要展示的是程序搜到蓝牙会通过list展示出来，并实时排序，远近与信号强弱

首先我们要有次jar包

我们先推断手机是否能支持蓝牙功能

if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
   Toast.makeText(this, "蓝牙不支持", Toast.LENGTH_SHORT).show();
}

然后我们看看蓝牙是否打开

if (!ylwlmanager.isBluetoothEnabled()) {
   Toast.makeText(this, "蓝牙没有打开", Toast.LENGTH_SHORT).show();
}

把list  适配器全初始化一下

private void UIinit() {

final YlwlManager ylwlmanager = YlwlManager.getInstance(mcontext);
   newDevicesListView = (ListView) findViewById(R.id.new_devices);   deviceAdapter = new DeviceAdapter(this, deviceList);   newDevicesListView.setAdapter(deviceAdapter);

  //把蓝牙接收打开  这里能够用个button控制  作者直接就打开了
   ylwlmanager.scanLeDevice(true);
   ylwlmanager.setYlwlManagerListener(lis);
}

蓝牙监听

YlwlManagerListener lis = new YlwlManagerListener() {
   @Override
   public void onUpdateBeacon(final ArrayList<BluetoothDeviceAndRssi> beacons) {
      /**
       * 传多个beacon过来 已经做好了排序 ， 距离 连接状态(BluetoothDeviceAndRssi isConn方法)
       * 也随时改变
       */
      runOnUiThread(new Runnable() {
         @Override
         public void run() {
            deviceList = beacons;

            Collections.sort(deviceList);// 距离排序
            deviceAdapter = new DeviceAdapter(DeviceListActivity.this, deviceList);
            newDevicesListView.setAdapter(deviceAdapter);
         }
      });
   }

   @Override
   public void onNewBeacon(BluetoothDeviceAndRssi beacon) {
      /**
       * 传单个beacon过来
       */
   }

   @Override
   public void onNewBeaconDataChang(BluetoothDeviceAndRssi beacon) {
      /**
       * 传单个beacon过来 并且是mac地址不变 距离变 连接状态变
       */
   }
};

以下是适配器代码

public class DeviceAdapter   extends BaseAdapter {
      Context context;
      List<BluetoothDeviceAndRssi> devices;
      LayoutInflater inflater;

      public DeviceAdapter(Context context,
            List<BluetoothDeviceAndRssi> devices) {
         this.context = context;
         inflater = LayoutInflater.from(context);
         this.devices = devices;
      }

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

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

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

      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
         ViewGroup vg = null;
         if (convertView != null) {
            vg = (ViewGroup) convertView;
         } else {
            vg = (ViewGroup) inflater
                  .inflate(R.layout.device_item, null);
         }

         BluetoothDeviceAndRssi bluetoothdeviceandrssi = devices
               .get(position);
         TextView tvadd = ((TextView) vg.findViewById(R.id.address));
         TextView tvname = ((TextView) vg.findViewById(R.id.name));
         ImageView image_rssi = (ImageView) vg.findViewById(R.id.image_rssi);

         byte rssival = (byte) bluetoothdeviceandrssi.getRssi();
         if (rssival > (-60)) {
            image_rssi.setImageResource(R.drawable.icon_rssi6);
         } else if (rssival > (-75)) {
            image_rssi.setImageResource(R.drawable.icon_rssi5);
         } else if (rssival > (-90)) {
            image_rssi.setImageResource(R.drawable.icon_rssi4);
         } else if (rssival > (-100)) {
            image_rssi.setImageResource(R.drawable.icon_rssi3);
         } else if (rssival > (-110)) {
            image_rssi.setImageResource(R.drawable.icon_rssi2);
         } else {
            image_rssi.setImageResource(R.drawable.icon_rssi1);
         }

         if (bluetoothdeviceandrssi.getBluetoothdevice().getName() == null) {
            tvname.setText("Unknow Name");
         } else {
            tvname.setText(bluetoothdeviceandrssi.getBluetoothdevice()
                  .getName());
         }
         tvadd.setText("mac地址"+ bluetoothdeviceandrssi.getBluetoothdevice().getAddress());
         return vg;
      }
   
}

图片是这个样子

最后重要的是
AndroidManifest.xml

我们先推断手机是否能支持蓝牙功能

<service
    android:name="com.yunliwuli.beacon.kit.service.UartService"
    android:enabled="true" />

权限

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

over

须要jar包请私密

作者水平有限。不喜勿喷

我们先推断手机是否能支持蓝牙功能