Created
May 25, 2015 03:16
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* 添加文字到图片,类似水印文字。 | |
* @param gContext | |
* @param gResId | |
* @param gText | |
* @return | |
*/ | |
public static Bitmap drawTextToBitmap(Context gContext, int gResId, String gText) { | |
Resources resources = gContext.getResources(); | |
float scale = resources.getDisplayMetrics().density; | |
Bitmap bitmap = BitmapFactory.decodeResource(resources, gResId); | |
android.graphics.Bitmap.Config bitmapConfig = bitmap.getConfig(); | |
// set default bitmap config if none | |
if (bitmapConfig == null) { | |
bitmapConfig = android.graphics.Bitmap.Config.ARGB_8888; | |
} | |
// resource bitmaps are imutable, | |
// so we need to convert it to mutable one | |
bitmap = bitmap.copy(bitmapConfig, true); | |
Canvas canvas = new Canvas(bitmap); | |
// new antialised Paint | |
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
// text color - #3D3D3D | |
paint.setColor(Color.rgb(61,61,61)); | |
// text size in pixels | |
paint.setTextSize((int) (14 * scale*5)); | |
// text shadow | |
paint.setShadowLayer(1f, 0f, 1f, Color.WHITE); | |
// draw text to the Canvas center | |
Rect bounds = new Rect(); | |
paint.getTextBounds(gText, 0, gText.length(), bounds); | |
//int x = (bitmap.getWidth() - bounds.width()) / 2; | |
//int y = (bitmap.getHeight() + bounds.height()) / 2; | |
//draw text to the bottom | |
int x = (bitmap.getWidth() - bounds.width())/10*9 ; | |
int y = (bitmap.getHeight() + bounds.height())/10*9; | |
canvas.drawText(gText, x , y, paint); | |
return bitmap; | |
} |
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