查找 Android 蓝牙配对设备 [英] Finding Android Bluetooth Paired Devices

问题描述

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配对蓝牙设备列表.

I'm trying to create an image button that, when pressed, presents the users a list of Paired Bluetooth devices to connect to.

但是，我在##1 处得到Set 无法解析为变量"，和mArrayAdapber 无法解析"在点 ##2(##1 和 ##2 不是代码的一部分...)

However, I get "Set cannot be resolved as a variable" at point ##1, and "mArrayAdapber cannot be resolved" at point ##2 (##1 and ##2 are not part of the code...)

我使用了 Android 网站上的代码，但在黑暗中，我发现自己陷入了黑暗.

I used the code from the Android site, but being in the dark, I find myself in the dark.

希望得到一些指导...

I'd appreciate some guidance...

//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() + "
" + device.getAddress());
            }
        }                                                                           
    }                       
});

推荐答案

对于 1) 如果您还没有这样做，请添加

For 1) Well if you haven't done so , add

> import java.util.Set;

在您的导入语句中.这将解决设置"错误.

in your import statements . This will resolve "Set" error.

对于2)声明并初始化

mArrayAdapter

例如在你的活动中做:

private ArrayAdapter<String> mArrayAdapter;

然后 onCreate:

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

然后将其添加到 ListView

which should then be added to a ListView

//为新发现的设备查找并设置 ListView

// Find and set up the ListView for newly discovered devices

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

 newDevicesListView.setOnItemClickListener(mDeviceClickListener);

<小时>

参考 Android 示例中的蓝牙聊天示例.它应该可以帮助您使用蓝牙 api 的

评论更新:

如果您仔细查看 BT 示例中的 BluetoothChat.java 文件，您会看到这个

If you look closely on BluetoothChat.java file in BT example, you'll see this

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();
            }
        }
    }

观看这一行:

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

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

This function connects to bluetooth device. First time it'll ask you to pair it automatically. Once paired, next time it'll auto connect to the bluetooth device.

这篇关于查找 Android 蓝牙配对设备的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！