大佬怎么取蓝牙设备已连接?

434673799 · 发表于 2020-7-6 12:46:06

本帖最后由 434673799 于 2020-8-10 21:19 编辑

大佬怎么取蓝牙设备已连接?通过广播获取到蓝牙设备已连接.通过提示框提醒.谢谢大佬

BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
Class<BluetoothAdapter> bluetoothAdapterClass = BluetoothAdapter.class;//得到BluetoothAdapter的Class对象
try {//得到连接状态的方法
Method method = bluetoothAdapterClass.getDeclaredMethod("getConnectionState", (Class[]) null);
//打开权限
method.setAccessible(true);
int state = (int) method.invoke(adapter, (Object[]) null);
if(state == BluetoothAdapter.STATE_CONNECTED){
Log.i("BLUETOOTH","BluetoothAdapter.STATE_CONNECTED");
Set<BluetoothDevice> devices = adapter.getBondedDevices();
Log.i("BLUETOOTH","devices:"+devices.size());
for(BluetoothDevice device : devices){
Method isConnectedMethod = BluetoothDevice.class.getDeclaredMethod("isConnected", (Class[]) null);
method.setAccessible(true);
boolean isConnected = (boolean) isConnectedMethod.invoke(device, (Object[]) null);
if(isConnected){
Log.i("BLUETOOTH","connected:"+device.getName());
deviceList.add(device);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}