private void startActivityFromString(String className) {
        try {
            Class<?> activityClass = Class.forName(className);
            Intent intent = new Intent(this, activityClass);
            startActivityForResult(intent, REQUEST_CODE);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            finish();
        } catch (ActivityNotFoundException e) {
            e.printStackTrace();

package ru.chizz.develop.skills;
 
import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.GestureDetector;