安卓获取设备蓝牙连接状态

我会带着你远行 2022-11-05 03:08 33阅读 0赞

获取已绑定设备的蓝牙信息与连接状态（注：获取连接状态方法被隐藏，必须通过反射调用），以下为示例代码：

package com.example.bluetoothtest;
    
    import androidx.appcompat.app.AppCompatActivity;
    import android.bluetooth.BluetoothAdapter;
    import android.bluetooth.BluetoothDevice;
    import android.os.Bundle;
    import android.util.Log;
    import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    import java.util.Set;
    
    public class MainActivity extends AppCompatActivity { 
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
    		//获取BluetoothAdapter
            BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
            showBondedDevice(bluetoothAdapter);
        }
    
        //获取已绑定设备信息和连接状态
        private void showBondedDevice(BluetoothAdapter bluetoothAdapter) { 
            Set<BluetoothDevice> deviceList = bluetoothAdapter.getBondedDevices();
            for (BluetoothDevice device : deviceList) { 
                Log.d("Jason", "Name:" + device.getName() + " Mac:" + device.getAddress());
    
                try { 
                    //使用反射调用获取设备连接状态方法
                    Method isConnectedMethod = BluetoothDevice.class.getDeclaredMethod("isConnected", (Class[]) null);
                    isConnectedMethod.setAccessible(true);
                    boolean isConnected = (boolean) isConnectedMethod.invoke(device, (Object[]) null);
                    Log.d("Jason", "isConnected：" + isConnected);
                } catch (NoSuchMethodException e) { 
                    e.printStackTrace();
                } catch (IllegalAccessException e) { 
                    e.printStackTrace();
                } catch (InvocationTargetException e) { 
                    e.printStackTrace();
                }
            }
        }
    }