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Editorial Team
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Asked: 2026-06-04T06:29:20+00:00

I have imported a project to Eclipse. The version of the API was 15

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I have imported a project to Eclipse. The version of the API was 15 and it compiled successfully, but I needed 7th because on my phone the OS cannot be updated. After changing the version of the Android API to older one (7th) I can’t compile the project, the follwing errors occures:

import android.hardware.usb.UsbConstants;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbEndpoint;
import android.hardware.usb.UsbInterface;
import android.hardware.usb.UsbManager;

It says R cannot be resolved to a variable:

setContentView(R.layout.main);

And in main.xml

android:layout_width="match_parent"

it says: String types not allowed (at ‘layout_width’ with value ‘match_parent’).

Is it possible to resolve this errors, but still using the old API version?

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1 Answer

  1. Editorial Team

    If you need the USB functionality: No. It exists since API level 12.

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