cannot find symbol variable imageView2 - android-studio

Question

I am just starting with Android Studio. I got some code from the web on how to ass a splash screen to my app, but it has compiling errors. I could use some help.
the errors are:
error. can not find symbol variable imageView2
error. can not find symbol variable s_img
error. can not find symbol variable s_image_black
error. can not find symbol variable s_image_black
I know this is due to my lack of knowledge, but I am just starting and trying to use this example to learn. Any help would be much appreciated.
Cheers
Paul
package org.quaestio.kotlinconvertedwebview;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.widget.ImageView;
import org.quaestio.kotlinconvertedwebview.MainActivity;
import java.util.Random;
public class Splashscreen extends Activity {
Thread splashTread;
ImageView imageView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splashscreen);
imageView = (ImageView)findViewById(R.id.imageView2);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
int[] ids = new int[]{R.drawable.s_img,R.drawable.s_image_black, R.drawable.s_image_black2};
Random randomGenerator = new Random();
int r= randomGenerator.nextInt(ids.length);
this.imageView.setImageDrawable(getResources().getDrawable(ids[r]));
splashTread = new Thread() {
#Override
public void run() {
try {
int waited = 0;
// Splash screen pause time
while (waited < 3500) {
sleep(100);
waited += 100;
}
Intent intent = new Intent(Splashscreen.this,
MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(intent);
Splashscreen.this.finish();
} catch (InterruptedException e) {
// do nothing
} finally {
Splashscreen.this.finish();
}
}
};
splashTread.start();
}
}
activity_splashscreen below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#feffc3"
android:layout_gravity="center"
android:id="#+id/lin_lay"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/splash"
android:background="#drawable/splash_img" />
</LinearLayout>

Answer 1

The problem is that you're setting an id wich don't correspond with the xml file. For example imageView = (ImageView)findViewById(R.id.imageView2); you need to change imageView2 with your xml imageview id wich is "splash". For the pthers error you need to check that files in the drawable folder.
Hope it was helpful

Answer 2

The ImageView in your xml has id splash, so in your code, instead of:
imageView = (ImageView)findViewById(R.id.imageView2);
you should do
imageView = (ImageView)findViewById(R.id.splash);
Also, this line:
int[] ids = new int[]{R.drawable.s_img, R.drawable.s_image_black, R.drawable.s_image_black2};
assumes that in your drawable folder there exist all these drawables:
s_img, s_image_black, s_image_black2
but apparently they don't, so you have to copy or create them and put them in the drawable folder.