我想在Android中实现以下效果: http://i.imgur.com/SPwQuNq.png
我非常接近使用下面的方法,但我现在需要它来清除背景,而文本仍然存在。叠加文本也有一个浅色调 - 因为#setColor(Color.WHITE) - 但没有它也没有显示文字。
public static Bitmap filterTextLetters(Bitmap bitmap, String text) {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(Color.WHITE);
paint.setTextAlign(Align.CENTER);
paint.setTypeface(Typeface.DEFAULT_BOLD);
paint.setTextSize(180);
paint.setXfermode(new PixelXorXfermode(Color.BLACK));
Bitmap photo = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(photo);
canvas.drawText(text, Statics.PHOTO_WIDTH / 2, Statics.PHOTO_HEIGHT / 2, paint);
return photo;
}
答案 0 :(得分:3)
您可以使用BitmapShader
:
public static Bitmap filterTextLetters(Bitmap bitmap, String text) {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setTextAlign(Align.CENTER);
paint.setTypeface(Typeface.DEFAULT_BOLD);
paint.setTextSize(180);
Shader shader = new BitmapShader(
bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
paint.setShader(shader);
final int width = bitmap.getWidth();
final int height = bitmap.getHeight();
Bitmap photo = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(photo);
canvas.drawText(text, width / 2, height / 2, paint);
return photo;
}