Android studio, java import inside "libraries" module?

Question

Java

package com.example.MyTestLib;

public class MyTestLibClass {
    public int GetWindowSizePx(){
        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        return 123456789;
    }
}

This is the code inside the java DLL, the difficulty is that when I try to import DisplayMetrics , I can't, help me, as in the library code, insert the lines

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.MotionEvent;

Like these.

Answer 1

Insert imports between package com.example.MyTestLib;
AND
public class MyTestLibClass