How to Show Image in Android using Java Code

IF you want to load image from drawable folder, you can using:

ImageView imgView=(ImageView) findViewById(R.id.imgView);
Drawable  drawable  = getResources().getDrawable(R.drawable.img);
imgView.setImageDrawable(drawable);

You have to use one default imageview in android xml when you are running app that time in activity you have to write this code so it will replace you image with another image. Check following code

ImageView imgView=(ImageView) findViewById(R.id.default_imgView);
imgView.setImageResource(R.drawable.yourimagename);

Using Drawable class you can show Image

Drawable  drawable  = Drawable.createFromPath(imagePath);
image.setImageDrawable(drawable);

I hope you are using ImageView to display the image in XML file with id iv.

In java file

ImageView iv = (ImageView)findViewById(R.id.iv);
iv.setImageResource(R.drawable.image1); // image1 is image file available in drawables folder

use ImageView and learn more about it from here imageview referecne

you can set image from bitmap,uri, from resources, etc...

frist add the images to drawable folder and using XML image view

 image = (ImageView) findViewById(R.id.imageView1);
  image.setImageResource(R.drawable.image_1);
  image.setImageResource(R.drawable.image_2);
  ..

You can use the following code

 ImageView img = new ImageView(this);  /*In new version of Android Studio you don't need to do castling.*/
    img = findViewById(R.id.android_image);
    Drawable img_drawable=getResources().getDrawable(R.drawable.draw_img);
    img_cookie.setImageDrawable(img_drawable);

The code below worked fine for me.

ImageView imageViewVar = (ImageView) findViewById(R.id.imageViewId);
imageViewVar.setImageResource(R.drawable.yourImgFile);