Add text to image in android programmatically

Question

I want to make an application just like opening screen of android.I am dynamically adding images to the rows of tableLayout. I have only defined tableLayout in xml file and

Answer 1

Here's Kotlin version Arun's solution:

import org.jetbrains.anko.dip

fun Context.writeTextOnDrawable(drawableId: Int, text: String) =
        DrawableUtil.writeTextOnDrawableInternal(this, drawableId, text, 25, -2, 0)

object DrawableUtil {

    fun writeTextOnDrawableInternal(context: Context, drawableId: Int, text: String,
            textSizeDp: Int, horizontalOffset: Int, verticalOffset: Int): BitmapDrawable {

        val bm = BitmapFactory.decodeResource(context.resources, drawableId)
                .copy(Bitmap.Config.ARGB_8888, true)

        val tf = Typeface.create("Helvetica", Typeface.BOLD)

        val paint = Paint()
        paint.style = Paint.Style.FILL
        paint.color = Color.WHITE
        paint.typeface = tf
        paint.textAlign = Paint.Align.LEFT
        paint.textSize = context.dip(textSizeDp).toFloat()

        val textRect = Rect()
        paint.getTextBounds(text, 0, text.length, textRect)

        val canvas = Canvas(bm)

        //If the text is bigger than the canvas , reduce the font size
        if (textRect.width() >= canvas.getWidth() - 4)
            //the padding on either sides is considered as 4, so as to appropriately fit in the text
            paint.textSize = context.dip(12).toFloat()

        //Calculate the positions
        val xPos = canvas.width.toFloat()/2 + horizontalOffset  

        //"- ((paint.descent() + paint.ascent()) / 2)" is the distance from the baseline to the center.
        val yPos = (canvas.height / 2 - (paint.descent() + paint.ascent()) / 2) + verticalOffset

        canvas.drawText(text, xPos, yPos, paint)

        return BitmapDrawable(context.resources, bm)
    }
}