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This article mainly introduces android how to achieve the icon to display numbers on the relevant knowledge, the content is detailed and easy to understand, simple and fast operation, has a certain reference value, I believe that after reading this android how to achieve digital display on the icon articles will have a harvest, let's take a look.

Effect picture:

Dynamically display the number of the day.

The main code is as follows:

Import android.content.Context;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Typeface;import android.graphics.drawable.BitmapDrawable / * author qhg * @ date March 5, 2014 * * / public class QNotifacationIcon {/ * add text to a given picture * * @ param context * context object * @ param resId * picture resource ID * @ param text * Text to be displayed * @ param textSize * text size * @ param color * text color * @ param typeface * text font * @ param offsetX * offset of text x * @ param offsetY * text y Offset * @ return Picture with text * / public static Bitmap generatorContactIcon (Context context Int resId, String text, float textSize, int color, Typeface typeface, float offsetX, float offsetY) {/ / get the image to be processed according to id Bitmap icon = ((BitmapDrawable) (context.getResources () .getDrawable (resId) .getBitmap () Int iconWidth = icon.getWidth (); int iconHeight = icon.getHeight (); / / initialize canvas Bitmap contactIcon = Bitmap.createBitmap (iconWidth, iconHeight, Config.ARGB_8888); / / build Canvas canvas = new Canvas (contactIcon); / / create brush Paint paint = new Paint () / / setting whether or not to use image dithering will make the color of the drawn image smoother and fuller, and the image clearer paint.setDither (true); / / if this item is set to true, the image will filter out the optimization operation of the Bitmap image in the course of animation and speed up the display / / speed. This setting depends on the setting of dither and xfermode paint.setFilterBitmap (true) / / capture the whole picture, from the upper left corner to the lower right corner Rect src = new Rect (0,0, iconWidth, iconHeight); / / the position of the intercepted image on the canvas Rect dst = new Rect (0,0, iconWidth, iconHeight); canvas.drawBitmap (icon, src, dst, paint) / / Anti-aliasing and use your own text kerning Paint numPaint = new Paint (Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG); / / set text color numPaint.setColor (color); / / set text size numPaint.setTextSize (textSize); / / set text font numPaint.setTypeface (typeface) / / draw the text content on the picture. The coordinates of x and y directly calculate the width-height offset ratio of the text on the picture canvas.drawText (text, iconWidth * offsetX, iconHeight * offsetY, numPaint); return contactIcon;}}

The digital font size does not fit with the screen size, and you can scale the font dynamically according to the width of the screen.

Call method:

/ dynamically draw date numbers on the picture ((ImageView) convertView.findViewById (R.id.iv_leftImage)) .setImageBitmap (QNotifacationIcon.generatorContactIcon (context, list_left_iamge_array [position], String.valueOf (new Date (). GetDate ()), 30f, Color.GRAY, Typeface.DEFAULT_BOLD, 0.35f, 0.75f)) This is the end of the article on "how to display numbers on the icon by android". Thank you for reading! I believe that everyone has a certain understanding of the knowledge of "how to display numbers on the icon by android". If you want to learn more, you are welcome to follow the industry information channel.

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