ble android 源代码,BLE 扫描及连接 android程序开发
时间: 2023-11-28 22:03:38 浏览: 97
以下是BLE Android源代码中BLE扫描和连接的示例代码:
BLE扫描:
```java
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() {
// 将扫描到的设备添加到列表中
mLeDeviceListAdapter.addDevice(device);
mLeDeviceListAdapter.notifyDataSetChanged();
}
});
}
};
```
BLE连接:
```java
private BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
// 连接成功后,开始搜索服务
gatt.discoverServices();
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
// 断开连接
mBluetoothGatt.close();
mBluetoothGatt = null;
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
// 搜索到服务后,可以根据服务和特征值读写数据
BluetoothGattService service = gatt.getService(UUID.fromString(SERVICE_UUID));
BluetoothGattCharacteristic characteristic = service.getCharacteristic(UUID.fromString(CHARACTERISTIC_UUID));
characteristic.setValue("Hello, BLE".getBytes());
gatt.writeCharacteristic(characteristic);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
// 读取特征值的响应
}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
// 写入特征值的响应
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
// 特征值发生变化
}
};
```
需要注意的是,在使用BLE功能前,需要先检查设备是否支持BLE功能,并获取BluetoothAdapter对象。示例代码如下:
```java
// 检查设备是否支持BLE功能
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
Toast.makeText(this, "BLE not supported", Toast.LENGTH_SHORT).show();
finish();
}
// 获取BluetoothAdapter对象
final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
```
同时,在使用完BLE功能后,需要释放相关资源。示例代码如下:
```java
@Override
protected void onDestroy() {
super.onDestroy();
if (mBluetoothGatt != null) {
mBluetoothGatt.close();
mBluetoothGatt = null;
}
}
```
希望这些代码能够对你有所帮助。
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