• Android 蓝牙相关
  • 蓝牙状态检测
  • 开启蓝牙
  • 监听蓝牙状态
  • 参考来源

Android 蓝牙相关

蓝牙状态检测

    private boolean checkBleOpen(Context context) {
        BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (mBluetoothAdapter == null) {
            // Device does not support Bluetooth
            LogUtil.e(Constants.TAG_V_520 + "device is not support Bluetooth.");
            return false;
        }
        if (!mBluetoothAdapter.isEnabled()) {
            return false;
        } else {
            return true;
        }
    }

开启蓝牙

    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    context.startActivity(enableBtIntent);

    或

    startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), REQUEST_ENABLE_BT);

以上两个调用方式在华为荣耀X2上会显示某个应用想要开启蓝牙 ，以下方式可以弹出正确的引导框，并且在6.0之前可用于默认开启蓝牙：

    BluetoothAdapter.getDefaultAdapter().enable();

当然，如果用户拒绝了，会返回false，可以继续调用方式1。

监听蓝牙状态

• onCreate中

    broadcastReceiver = new BluetoothBroadcastReceiver(this);
    registerReceiver(broadcastReceiver, getIntentFilter());
  

• onDestroy中

    unregisterReceiver(broadcastReceiver);
  

• 函数参考

    private IntentFilter getIntentFilter() {
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
        return intentFilter;
    }
  

    public static class BluetoothBroadcastReceiver extends BroadcastReceiver {
        private IStartWifiDisplay iStartWifiDisplay;
  
        public BluetoothBroadcastReceiver(IStartWifiDisplay iStartWifiDisplay) {
            this.iStartWifiDisplay = iStartWifiDisplay;
        }
  
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action == null) {
                LogUtil.e(Constants.TAG_V_520 + "receiver action is null.");
                return;
            }
            switch (action) {
                case BluetoothAdapter.ACTION_STATE_CHANGED:
                    int blueState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);
                    if (blueState == BluetoothAdapter.STATE_ON) {
                        //TODO
                    }
                    break;
                default:
                    break;
            }
        }
    }
  

参考来源

https://developer.android.com/guide/topics/connectivity/bluetooth