Draw shadowed text into a canvas

B_Thax · by **B_Thax** » Mon Aug 09, 2010 7:59 pm

Some times when you need to draw some simple text into the canvas you need to draw it with a surrounding shadow to get some contrast and to be able to read the text if the background has been drawn with a similar color. This is not the most efficient way to do it but it's quite simple.

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Using java Syntax Highlighting

/**
 * Draw specified text with a fully sourrounding shadow.
 * 
 * @param canvas - Canvas we will draw to
 * @param text - Text we will draw
 * @param x - x position
 * @param y - y position
 * @param textPaint - Paint object used to draw the actual text
 * @param shadowPaint - Paint object used to draw the background shadow
 */
public static void drawTextShadowed(Canvas canvas, String text, float x, float y, Paint textPaint, Paint shadowPaint) {
    // Draw all 4 sides of the shadow
    canvas.drawText(text, x-1, y, shadowPaint);
    canvas.drawText(text, x, y+1, shadowPaint);
    canvas.drawText(text, x+1, y, shadowPaint);
    canvas.drawText(text, x, y-1, shadowPaint);
    
    // Draw the final overlay text in the middle
    canvas.drawText(text, x, y, textPaint);
}
 
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Cheers,
Moss

pskink · by **pskink** » Tue Aug 10, 2010 8:02 am

B_Thax wrote:Some times when you need to draw some simple text into the canvas you need to draw it with a surrounding shadow to get some contrast and to be able to read the text if the background has been drawn with a similar color. This is not the most efficient way to do it but it's quite simple.

Cheers,
Moss

you can use http://developer.android.com/reference/ ... ayer(float, float, float, int)

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Using java Syntax Highlighting

textPaint.setShadowLayer(radius, dx, dy, color);
canvas.drawText(text, x, y, textPaint);
 
 
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

Draw shadowed text into a canvas

Draw shadowed text into a canvas

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