方式一

如果圖片命名規(guī)范

private fun getImageRes(imgIndex: Int): Int {
        return resources.getIdentifier("img_$imgIndex", "drawable", packageName)
    }

調(diào)用

imageView.setImageResource(getImageRes(1))

方式二

如果圖片命名不規(guī)范

private val drawables = arrayOf(R.drawable.img_0, R.drawable.img_1, R.drawable.img_2)
private fun getImageRes(imgIndex: Int): Int {
    return drawables[imgIndex]
}

調(diào)用

imageView.setImageResource(getImageRes(1))