Listview和OnItemClickListener（藍牙設備）

Question

我遇到OnItemClickListener問題。 例如，我在清單4臺的藍牙設備，我點擊一個元素和應用盡量只用列表的最後一個元素配對不與我點擊

import android.bluetooth.BluetoothAdapter; 
import android.bluetooth.BluetoothDevice; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.util.Log; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
import java.lang.reflect.Method; 
import java.util.ArrayList; 


public class bluetooth extends AppCompatActivity { 
    private ListView listView; 
    private ArrayList<String> mDeviceList = new ArrayList<String>(); 
    private BluetoothAdapter mBluetoothAdapter; 
    private final static int REQUEST_ENABLE_BT=1; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.bluetooth); 

     listView = (ListView) findViewById(R.id.listView); 
     mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 
     mBluetoothAdapter.startDiscovery(); 
     IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
     registerReceiver(mReceiver, filter); 
     if(!mBluetoothAdapter.isEnabled()) 
     { 
      Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 
      mBluetoothAdapter.startDiscovery(); 
      registerReceiver(mReceiver, filter); 
     } 

    } 

    @Override 
    protected void onDestroy() { 
     unregisterReceiver(mReceiver); 
     super.onDestroy(); 
    } 
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
     public void onReceive(Context context, final Intent intent) { 
      final BluetoothDevice device = intent 
       .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
      String action = intent.getAction(); 
      if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
       BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
       mDeviceList.add(bluetoothDevice.getName() + "\n" 
        + bluetoothDevice.getAddress()); 
       listView.setAdapter(new ArrayAdapter<String>(context, 
        android.R.layout.simple_list_item_1, mDeviceList)); 
      } 
      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> adapter, View view, int pos, long id){ 
        String devicep=listView.getAdapter().getItem(pos).toString(); 
        Log.i("device",devicep); 
        pairDevice(device); 
       } 
      }); 
     } 
    }; 

    private void pairDevice(BluetoothDevice b1) { 
     try { 
      Method method = b1.getClass().getMethod("createBond", (Class[]) null); 
      method.invoke(b1, (Object[]) null); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
} 

Answer 1

這可能是因爲您已將上次發現的設備保存在變量'device'中，並且您在ListView onItemClick上調用了PairDevice（設備），而與被點擊的項目的位置無關。

您可能希望保存所有列表中的廣播發現的設備，並根據項目從列表中獲得相應的設備對象點擊，這樣的事情：

private ArrayList<BluetoothDevice> mDevices = new ArrayList<BluetoothDevice>(); 

private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
    public void onReceive(Context context, final Intent intent) { 
     final BluetoothDevice device = intent 
      .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
     String action = intent.getAction(); 
     if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
      BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
      // Add the recently discovered device in a list 
      mDevices.add(bluetoothDevice); 
      mDeviceList.add(bluetoothDevice.getName() + "\n" 
       + bluetoothDevice.getAddress()); 
      listView.setAdapter(new ArrayAdapter<String>(context, 
       android.R.layout.simple_list_item_1, mDeviceList)); 
     } 
     listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> adapter, View view, int pos, long id){ 
       String devicep=listView.getAdapter().getItem(pos).toString(); 
       Log.i("device",device); 
       // Get the BluetoothDevice corresponding to the clicked item 
       pairDevice(mDevices.get(position)); 
      } 
     }); 
    } 
}; 

Answer 2

在你onItemClick你的元素對你點擊的列表項目沒有做任何事情。您需要從列表中獲取該項目並將其配對。

BluetoothDevice bluetoothDevice = (BluetoothDevice) listView.getAdapter().getItem(pos); 
       pairDevice(bluetoothDevice); 

試試看，並告訴我它是否有效。