write On Drawable - Android Graphics

Android examples for Graphics:Drawable Operation

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  4. Drawable Operation

Description

write On Drawable

Demo Code


//package com.java2s;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Paint.Style;
import android.graphics.drawable.BitmapDrawable;

public class Main {
    public static BitmapDrawable writeOnDrawable(Context context,
            int drawableId, String text, int color, int textSize) {
        if (context == null)
            return null;

        Bitmap bitmap = BitmapFactory.decodeResource(
                context.getResources(), drawableId);
        if (bitmap == null)
            return null;

        Bitmap copy = bitmap.copy(Bitmap.Config.ARGB_8888, true);
        if (copy == null)
            return null;

        Paint paint = new Paint();
        paint.setColor(color);//ww  w  .jav  a2s  . com
        paint.setAntiAlias(true);
        paint.setTextSize(textSize);
        paint.setStyle(Style.FILL);
        paint.setTextAlign(Align.CENTER);

        Canvas canvas = new Canvas(copy);
        int x = (canvas.getWidth() / 2);
        int y = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint
                .ascent()) / 2));
        canvas.drawText(text, x, y, paint);

        return new BitmapDrawable(context.getResources(), copy);
    }
}

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