寻找Android蓝牙配对设备

时间:2011-08-26 02:40:38

标签: android bluetooth

我正在尝试创建一个图像按钮,当按下该按钮时,会向用户显示要连接的已配对蓝牙设备的列表。

然而,我在第## 1点得到“Set not as as resolved off”, 并且在## 2点处“mArrayAdapber无法解析” (## 1和## 2不是代码的一部分......)

我使用了Android网站上的代码,但是在黑暗中,我发现自己处于黑暗中。

我很感激一些指导......

//搜索

ImageButton bSearch = (ImageButton) findViewById(R.id.Search);
bSearch.setOnClickListener(new View.OnClickListener() {
    public void onClick(View view) {                        
        ##1Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
        // If there are paired devices
        if (pairedDevices.size() > 0) {
            // Loop through paired devices
            for (BluetoothDevice device : pairedDevices) {
                // Add the name and address to an array adapter to show in a ListView
                ##2mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
            }
        }                                                                           
    }                       
});

3 个答案:

答案 0 :(得分:4)

1)如果你还没有这样做,请添加

<强>&GT; import java.util.Set;

导入语句中的

。这将解决“设置”错误。

For 2)声明并初始化

  

<强> mArrayAdapter

例如,在您的活动中执行:

private ArrayAdapter<String> mArrayAdapter;

然后on onCreate:

 mArrayAdapter= new ArrayAdapter<String>(this, <your layout file>);

然后应该添加到ListView

  

//为新发现的设备查找并设置ListView

   ListView newDevicesListView = (ListView)
 findViewById(R.id.<layout_file>);
         newDevicesListView.setAdapter(mArrayAdapter);

 newDevicesListView.setOnItemClickListener(mDeviceClickListener);

请参阅Android示例中的蓝牙聊天示例。它应该可以帮助您使用蓝牙API


评论更新:

如果你仔细观察BT示例中的BluetoothChat.java文件,你会看到这个

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(D) Log.d(TAG, "onActivityResult " + resultCode);
        switch (requestCode) {
        case REQUEST_CONNECT_DEVICE:
            // When DeviceListActivity returns with a device to connect
            if (resultCode == Activity.RESULT_OK) {
                // Get the device MAC address
                String address = data.getExtras()
                                     .getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
                // Get the BLuetoothDevice object
                BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
                // Attempt to connect to the device
                mChatService.connect(device);
            }
            break;
        case REQUEST_ENABLE_BT:
            // When the request to enable Bluetooth returns
            if (resultCode == Activity.RESULT_OK) {
                // Bluetooth is now enabled, so set up a chat session
                setupChat();
            } else {
                // User did not enable Bluetooth or an error occured
                Log.d(TAG, "BT not enabled");
                Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();
                finish();
            }
        }
    }

观看此行:

 // Attempt to connect to the device
 mChatService.connect(device);

此功能连接到蓝牙设备。第一次它会要求你自动配对。配对后,下次它将自动连接到蓝牙设备。

答案 1 :(得分:3)

您好,您也可以尝试使用此代码,只需获取已设置的绑定设备。

 private ArrayAdapter<String> bondedAdapter = null;
    private ListView listViewPairedDevices = null;

@Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        try {
    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    listViewPairedDevices = (ListView) findViewById(R.id.listViewPairedDevices);
    bondedAdapter = new ArrayAdapter<String>(this, R.layout.lyt_scanlist_textview);

    Set<BluetoothDevice> bondedSet = bluetoothAdapter.getBondedDevices();
                Log.v(BluetoothDemoActivity.LOG, "BluetoothDemo : bondedSet: "+bondedSet);

                int count = 0;
                if(bondedSet.size() > 0){
                    for(BluetoothDevice device : bondedSet){
                        textViewPairedDevice.setVisibility(View.VISIBLE);
                        bondedAdapter.add(device.getName()+"\n"+device.getAddress());
                        Log.v(BluetoothDemoActivity.LOG, " count = "+count++);
                    }
                }else{
                    bondedAdapter.add("No Devices");
                }

    listViewPairedDevices.setAdapter(bondedAdapter);
} catch (Exception e) {
            // TODO Auto-generated catch block
            Log.e(BluetoothDemoActivity.LOG, e.toString(),e.fillInStackTrace());
        }
    }//onStart ends 

答案 2 :(得分:0)

只需从代码中的##1##2分别删除##1Set<BluetoothDevice>##2mArrayAdapter即可。我想你只是从其他来源复制/粘贴而没有注意。这不是原始代码的一部分。它仅用于列表编号目的。