我对java很新，目前正在开发一个项目。我已经设法从我的应用程序内打开和关闭蓝牙。我还有一个列表视图，其中包含配对设备列表。我创建了一个“onListItemClick”方法。但是，我似乎无法弄清楚如何与其中一个配对设备建立连接。任何帮助，将不胜感激。谢谢。
import java.util.Set;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class Devices extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ArrayAdapter<String> btArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = btAdapter.getBondedDevices();
if(pairedDevices.size()>0){
for (BluetoothDevice device :pairedDevices){
String name = device.getName();
btArrayAdapter.add(name);
}
}
setListAdapter(btArrayAdapter);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
//Here, I want to establish a connection with the device chosen by the user
}
}
答案 0 :(得分：1)
我为你做了一个例子：
public class MainActivity extends Activity{
private BluetoothAdapter mBluetoothAdapter;
private ArrayAdapter<String> mPairedDevicesArrayAdapter;
private ListView PairedListView;
private BluetoothService mBluetoothService = null;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
// Initialize ArrayAdapter for paired devices
mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
PairedListView = (ListView)findViewById(R.id.listView_paired_devices);
PairedListView.setAdapter(mPairedDevicesArrayAdapter);
PairedListView.setOnItemClickListener(this);
getPairedDevices();
}
private void getPairedDevices(){
// Get a set of currently paired devices
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
// If there are paired devices, add each one to the ArrayAdapter
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
// Add paired devices to ArrayAdapter
// ArrayAdapter will be connected to LisView
mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
}
} else {
String noDevices = getResources().getText(R.string.title_none_paired).toString();
mPairedDevicesArrayAdapter.add(noDevices);
}
}
}
@Override
public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
// Cancel discovery because it's costly and we're about to connect
mBluetoothAdapter.cancelDiscovery();
// Get the device MAC address, which is the last 17 chars in the View
String info = ((TextView) v).getText().toString();
String adress = info.substring(info.length() -17);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(adress);
// Attempt to connect to the given bluetooth device in separate thread
// Reason for this is because connecting and sending bytes are blocking calls
mBluetoothService.connect(device);
}
public class BluetoothService {
// Unique UUID for this application
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
private BluetoothAdapter mBluetoothAdapter;
public synchronized void connect(BluetoothDevice device){
// Start ConnectThread to connect to given device
mConnectThread = new ConnectThread(device);
mConnectThread.start();
}
private class ConnectThread extends Thread {
private final BluetoothSocket mBluetoothSocket;
private final BluetoothDevice mBluetoothDevice;
public ConnectThread(BluetoothDevice device){
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
mBluetoothDevice = device;
BluetoothSocket tmp = null;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try{
// MY_UUID is the app's UUID string
tmp = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e){
}
mBluetoothSocket = tmp;
}
public void run(){
// Because BuluetoothAdapter.discovery() is
// heavy weight procedure, cancel any on
// going discovery before attempting to connect
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBluetoothAdapter.cancelDiscovery();
// Connect the device through the socket. This is blocking call so it
// will return on a successful connection or an exception
// Make a connection to the BluetoothSocket
try {
// Connect the device through the socket. This is blocking call so it
// will return on a successful connection or an exception
mBluetoothSocket.connect();
} catch (IOException e) {
try {
// Unable to connect, close the socket and get out
mBluetoothSocket.close();
setState(STATE_CONNECTION_FAILED);
} catch (IOException e1) {
e1.printStackTrace();
}
}
// Reset the ConnectThread because we're done
synchronized (BluetoothService.this) {
mConnectThread = null;
}
// Do work to manage the connection (in a separate thread)
if(mBluetoothSocket.isConnected()){
connected(mBluetoothSocket, mBluetoothDevice); }
}
public void cancel(){
// This method will cancel an in-progress connection and close the socket
try {
mBluetoothSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}