相关疑难解决方法(0)

目标是读取蓝牙LE心率监测器的值.

使用谷歌的样本,我明白了

private void scanLeDevice(final boolean enable) {
    if (enable) {
        // Stops scanning after a pre-defined scan period.
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mScanning = false;
                mBluetoothAdapter.stopLeScan(mLeScanCallback);
            }
        }, SCAN_PERIOD);

        mScanning = true;
        mBluetoothAdapter.startLeScan(mLeScanCallback);
    } else {
        mScanning = false;
        mBluetoothAdapter.stopLeScan(mLeScanCallback);
    }
}

导致mBluetoothAdapter.stopLeScan显示为已弃用.但是Startscan不是方法mBluetoothAdapter.

如何更改它以使其与当前API一起使用？

我正在开发一个必须与BLE设备连接的应用程序,在我的代码中,我想使用从API 21(Android 5)实现的新的Scan和ScanCallback for BLE,但我必须保持与Android 4.3及更高版本的兼容性.

所以我用这种方式编写了代码:

        if (Build.VERSION.SDK_INT >= 21) {
            mLEScanner.startScan(filters, settings, mScanCallback);
        } else {
            btAdapter.startLeScan(leScanCallback);
        }

我已经定义了2个回调,一个用于API 21及更高版本,另一个用于API 18到20:

    //API 21
private ScanCallback mScanCallback = new ScanCallback() {
        @Override
        public void onScanResult(int callbackType, ScanResult result) {
              BluetoothDevice btDevice = result.getDevice();
              connectToDevice(btDevice);
         }
         public void connectToDevice(BluetoothDevice device) {
              if (mGatt == null) {
                   mGatt = device.connectGatt(context, false, btleGattCallback);
                   if (Build.VERSION.SDK_INT < 21) {
                        btAdapter.stopLeScan(leScanCallback);
                   } else {
                        mLEScanner.stopScan(mScanCallback);
                   }
               }
         }
    };


//API 18 to 20
        private …