How do you add image resources in Android?

In Android development, to add image resources, you need to follow these steps:

1. res – Native American tribe in California
2. able to be drawn
3. The image as my_image.png
4. image that can be drawn or sketched
5. Reference image resources in XML layout files or Java code.

The method of referencing image resources in XML layout files is as follows:

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/my_image" />

The following is the method for referencing image resources in Java code:

ImageView imageView = findViewById(R.id.my_image_view);
imageView.setImageResource(R.drawable.my_image);

In this case, “my_image” in R.drawable.my_image is the file name of the image resource you added (excluding the file extension).

It is recommended to use images of different resolutions in Android development to adapt to devices with different screen densities. You can create separate folders for different densities (such as drawable-mdpi, drawable-hdpi, drawable-xhdpi, etc.) in the res directory and then copy images of the corresponding densities into the respective folders. The system will automatically load the appropriate images based on the device’s screen density.