How To Call Image ID From Drawable Folder Using Code Behind In Android

In Some situation we need to set image code behind, that time you fetch image id without XML file in you code behind. You can set it through the resource and drawable property. See in below examples

You can call this image in your application project’s XML file using XML attributes like: android:drawable and android:icon.

Android always use and support bitmap image file. So whenever you insert image in another format like .png, .jpg, .gif.

.png = preferred
.jpg = acceptable
.gif = discouraged

You can call drawable image id using code behind through the below property and syntax

// image name >> facebook_icon
Resources res = getResources();
Drawable dr = res.getDrawable(R.drawable.facebook_icon);

See below image,

Call Drawable image ID using Code behind in android

By the calling Image id you can set image style like “image behind textbox”, “Beckground image”.
Code for Image behind textbox

Resources res = getResources();
Drawable shape = res. getDrawable(R.drawable.gradient_box);

TextView tv = (TextView)findViewByID(R.id.textview);
tv.setBackground(shape);

If you want to make different layout XML file under res folder for different screen size, read this article must useful