我有代码在这样的图像中添加水印
public static Bitmap mark(Bitmap src, String watermark, Point location, Color color, int alpha, int size, boolean underline) {
int w = src.getWidth();
int h = src.getHeight();
Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());
Canvas canvas = new Canvas(result);
canvas.drawBitmap(src, 0, 0, null);
Paint paint = new Paint();
paint.setColor(color.RED);
paint.setAlpha(alpha);
paint.setTextSize(size);
paint.setAntiAlias(true);
paint.setUnderlineText(underline);
canvas.drawText(watermark, location.x, location.y, paint);
return result;
}
我用这段代码调用该函数
mark(bitmap, "watermark", b, null, c, 100, false);
imgshoot.setImageBitmap(bitmap);
但没有任何事情发生,你能帮帮我吗?感谢
答案 0 :(得分:8)
它解决了,我只是改变了一点代码,感谢你的建议Doomknight:)
public static Bitmap mark(Bitmap src, String watermark) {
int w = src.getWidth();
int h = src.getHeight();
Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());
Canvas canvas = new Canvas(result);
canvas.drawBitmap(src, 0, 0, null);
Paint paint = new Paint();
paint.setColor(Color.RED);
paint.setTextSize(18);
paint.setAntiAlias(true);
paint.setUnderlineText(true);
canvas.drawText(watermark, 20, 25, paint);
return result;
}
我用这个函数调用
bitmap = mark(bitmap, "Hallo");
imgshoot.setImageBitmap(bitmap);
答案 1 :(得分:2)
您没有将返回的位图result
分配给任何内容。将旧位图替换为新位图。
bitmap = mark(bitmap, "watermark", b, null, c, 100, false);
imgshoot.setImageBitmap(bitmap);
编辑:
根据评论,你仍然遇到问题:尝试硬编码一些参数,进行测试。看看你的params是否存在问题。
Paint paint = new Paint();
paint.setColor(color.RED);
//paint.setAlpha(alpha);
paint.setTextSize(20); //size
//paint.setAntiAlias(true);
paint.setUnderlineText(underline);
canvas.drawText(watermark, 10, 10, paint); //location.x, location.y
答案 2 :(得分:0)
private Bitmap addWaterMark(Bitmap src)
{
int w = src.getWidth();
int h = src.getHeight();
Bitmap result = Bitmap.createBitmap(w,h,src.getConfig());
Canvas canvas = new Canvas(result);
canvas.drawBitmap(src,0,0, null);
Bitmap waterMark = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.ic_laucher);
canvas.drawBitmap(waterMark,0,0,null);
return result;
}