Change two images on button click (Android)

Question

So, I want to make a button which every time it gets pressed, it changes the image above the button. I have 2 images in total, so I don't use arrays. Let's say I have image1.png and image2.png. The default image is image1 and after I press the button it turns to image2. If I press it again it turns to image1.

package blablablabla;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {

ImageView image;

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

    image = (ImageView) findViewById(R.id.myicon);
}


public void onClick(View view) {
    switch(view.getId()){
    case R.id.button1:{
        image.setImageResource(R.drawable.initial);
        return;
    }
  }
 }
}

I thought of making an if statment: if the image is image1, then change it to image2 and vice-versa.

The problem: after I change to image2, I can't switch back. I know I didn't write the code for that because I made it wrrong.

Answer 1

Ok i think this might do:

package blablablabla;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {

ImageView image;
boolean flag = true;

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

    image = (ImageView) findViewById(R.id.myicon);
}


public void onClick(View view) {
    switch(view.getId()){
    case R.id.button1:{
    if(flag)
    {       
        image.setImageResource(R.drawable.initial);
        flag=false;
    }
    else
    {
        image.setImageResource(R.drawable.secondary);
        flag=true;
    }
        return;
    }
  }
 }
}