使用 Java 类编写的蓝牙测试代码，用于搜索和显示可连接蓝牙的名称与id，并利用 View 显示出来，搜索使用TextView，显示可连接蓝牙的名称与id使用ListView。类名为 BluetoothTest

好的，让我为您编写这个Java类。以下是BluetoothTest类的代码：

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.List;
public class BluetoothTest extends AppCompatActivity {
    private BluetoothAdapter bluetoothAdapter;
    private List<String> deviceList = new ArrayList<>();
    private ListView listView;

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

        // 获取BluetoothAdapter
        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter == null) {
            Toast.makeText(this, "设备不支持蓝牙", Toast.LENGTH_SHORT).show();
            finish();
        }

        // 初始化TextView和ListView
        TextView textView = findViewById(R.id.textView);
        listView = findViewById(R.id.listView);

        // 设置ListView的点击事件
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                String item = deviceList.get(i);
                String[] deviceInfo = item.split("\n");
                String name = deviceInfo[0];
                String address = deviceInfo[1];
                Intent intent = new Intent();
                intent.putExtra("name", name);
                intent.putExtra("address", address);
                setResult(RESULT_OK, intent);
                finish();
            }
        });

        // 搜索蓝牙设备
        if (!bluetoothAdapter.isEnabled()) {
            Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableIntent, 1);
        } else {
            searchDevices();
        }
    }

    // 搜索蓝牙设备
    private void searchDevices() {
        deviceList.clear();
        bluetoothAdapter.startDiscovery();
        Toast.makeText(this, "正在搜索蓝牙设备", Toast.LENGTH_SHORT).show();
        // 设置广播接收器，接收搜索到的蓝牙设备
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        registerReceiver(receiver, filter);
    }

    // 广播接收器，接收搜索到的蓝牙设备
    private BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                String name = device.getName();
                String address = device.getAddress();
                if (name == null) {
                    name = "未知设备";
                }
                String item = name + "\n" + address;
                deviceList.add(item);
                // 更新ListView
                ArrayAdapter<String> adapter = new ArrayAdapter<>(BluetoothTest.this, android.R.layout.simple_list_item_1, deviceList);
                listView.setAdapter(adapter);
            }
        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(receiver);
    }
}

在此代码中，我们使用了BluetoothAdapter类来搜索蓝牙设备。我们还使用了ListView和ArrayAdapter类来显示可连接蓝牙的名称与id。我们还使用了BroadcastReceiver类来接收搜索到的蓝牙设备。在ListView中，当用户点击某个蓝牙设备时，我们将其名称和id作为Intent的Extra数据返回给调用此Activity的Activity。请注意，这只是一个简单的示例，您可以根据您的需求进行修改。