在Android中查询USB设备

import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import android.os.Bundle;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        TextView textView = findViewById(R.id.textView);

        UsbManager usbManager = (UsbManager) getSystemService(USB_SERVICE);
        if (usbManager != null) {
            for (UsbDevice device : usbManager.getDeviceList().values()) {
                textView.append("Device Name: " + device.getDeviceName() + "\n");
                textView.append("Vendor ID: " + device.getVendorId() + "\n");
                textView.append("Product ID: " + device.getProductId() + "\n\n");
            }
        } else {
            textView.setText("USB Manager is not available.");
        }
    }
}

<uses-feature android:name="android.hardware.usb.host" />
<uses-permission android:name="android.permission.USB_PERMISSION" />

UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
UsbDevice device; // 获取到的USB设备

PendingIntent permissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
registerReceiver(usbPermissionReceiver, filter);

usbManager.requestPermission(device, permissionIntent);