java代码实现android自动连接ble设备

你好，关于Java代码实现Android自动连接BLE设备的问题，我可以为您提供一些基本的思路和参考代码。首先，您需要使用Android中的BLE API来搜索和连接BLE设备。然后，您可以使用服务和特征值来与设备进行通信。以下是一些可能有用的示例代码：

1. 初始化BLE适配器和回调函数

BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();
BluetoothGatt mBluetoothGatt;

//设备连接状态回调函数
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
	@Override
	public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
		if (newState == BluetoothProfile.STATE_CONNECTED) {
			Log.d(TAG, "Connected to GATT server.");
			mBluetoothGatt.discoverServices(); //连接成功之后搜索设备的服务
		} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
			Log.d(TAG, "Disconnected from GATT server.");
		}
	}
};

2. 搜索BLE设备

//BLE设备广播回调函数
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        final String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            //获取扫描到的设备信息
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            if (device.getName() != null) {
                Log.d(TAG, "Found device: " + device.getName());
                if (device.getName().equals("My BLE Device")) { //如果找到指定设备
					//停止扫描并连接设备
                    mBluetoothAdapter.stopLeScan(mLeScanCallback);
                    mBluetoothGatt = device.connectGatt(getApplicationContext(), false, mGattCallback);
                }
            }
        }
    }
};

//开始搜索设备
private void scanBLEDevices() {
    mHandler.postDelayed(new Runnable() {
        @Override
        public void run() {
            mBluetoothAdapter.stopLeScan(mLeScanCallback);
        }
    }, 10000); //设置扫描时间为10s
    mBluetoothAdapter.startLeScan(mLeScanCallback);
}

//设备搜索回调函数
private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {
    @Override
    public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Log.d(TAG, "Found device: " + device.getName());
            }
        });
    }
};

3. 连接BLE设备并搜索服务

//连接设备
private void connectToDevice(String deviceAddress) {
    BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceAddress);
    mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
}

//搜索服务
private void discoverServices() {
    if (mBluetoothGatt != null) {
        mBluetoothGatt.discoverServices();
    }
}

//服务搜索回调函数
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
    if (status == BluetoothGatt.GATT_SUCCESS) {
        List<BluetoothGattService> services = gatt.getServices();
        for (BluetoothGattService service : services) {
            Log.d(TAG, "Found service: " + service.getUuid());
        }
    } else {
        Log.d(TAG, "Service discovery failed.");
    }
}

以上是简单的示例代码，您可以根据自己的需求进行相应的更改和扩展。同时，也需要注意安全与隐私问题，确保BLE设备的安全连接和数据传输。希望能够对您有所帮助。