Android藍牙開發，如何獲取UUID？

Question

我想用Android連接到其他藍牙設備，這不是Android系統，但BlueToothDevice的方法需要一個UUID來連接。我如何獲得UUID？

爲了解決我找到了解決這個問題，代碼如下：

/** 
*variable "device" is a BlueToothDevice 
*/ 

method = device.getClass().getMethod("createRfcommSocket", new Class[{int.class}); 
tmp = (BluetoothSocket) method.invoke(device, 1); 

代碼解決這個問題，但我不知道爲什麼。請告訴我原理

Answer 1

請嘗試下面的代碼。我認爲，這將通過裝置上顯示的細節和近::

1）AndroidManifest.xml中 - 下面添加的權限

uses-permission android:name="android.permission.BLUETOOTH" 

uses-permission android:name="android.permission.BLUETOOTH_ADMIN" 

2）MainActivity.java

import java.util.Set; 

import android.app.Activity; 
import android.bluetooth.BluetoothAdapter; 
import android.bluetooth.BluetoothDevice; 
import android.content.Intent; 
import android.os.Bundle; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MainActivity extends Activity { 

    private static final int REQUEST_ENABLE_BT = 12; 
    private TextView out; 
    private BluetoothAdapter adapter; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     out = (TextView) findViewById(R.id.tvBluetoothInfo); 
     setBluetoothData(); 

     if (Connections.blueTooth()) { 
      Intent enableBtIntent = new Intent(
        BluetoothAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 
     } 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(requestCode, resultCode, data); 
     out.setText(""); 
     setBluetoothData(); 
    } 

    private void setBluetoothData() { 

     // Getting the Bluetooth adapter 
     adapter = BluetoothAdapter.getDefaultAdapter(); 
     out.append("\nAdapter: " + adapter.toString() + "\n\nName: " 
       + adapter.getName() + "\nAddress: " + adapter.getAddress()); 

     // Check for Bluetooth support in the first place 
     // Emulator doesn't support Bluetooth and will return null 

     if (adapter == null) { 
      Toast.makeText(this, "Bluetooth NOT supported. Aborting.", 
        Toast.LENGTH_LONG).show(); 
     } 

     // Starting the device discovery 
     out.append("\n\nStarting discovery..."); 
     adapter.startDiscovery(); 
     out.append("\nDone with discovery...\n"); 

     // Listing paired devices 
     out.append("\nDevices Pared:"); 
     Set<BluetoothDevice> devices = adapter.getBondedDevices(); 
     for (BluetoothDevice device : devices) { 
      out.append("\nFound device: " + device.getName() + " Add: " 
        + device.getAddress()); 
     } 
    } 

} 

3）連接。的java

import android.bluetooth.BluetoothAdapter; 

public class Connections { 

    private static boolean state = false; 

    public static boolean blueTooth() { 

     BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter(); 
     if (!bluetooth.isEnabled()) { 
      System.out.println("Bluetooth is Disable..."); 
      state = true; 
     } else if (bluetooth.isEnabled()) { 
      String address = bluetooth.getAddress(); 
      String name = bluetooth.getName(); 
      System.out.println(name + " : " + address); 
      state = false; 
     } 
     return state; 
    } 

} 

4）main.xml中

<TextView 
    android:id="@+id/tvBluetoothInfo" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" />