任何身体都可以告诉我擦除图像上的油漆,在我的应用程序中我准备了手指画在图像上,如果我想擦除它的颜色,在图像上获得黑色而不是擦除图像。我的代码是
public class MyView extends View {
int bh = originalBitmap.getHeight();
int bw = originalBitmap.getWidth();
public MyView(Context c) {
super(c);
//mBitmap = Bitmap.createScaledBitmap(originalBitmap,bw,bh,true);
mBitmap = Bitmap.createBitmap(bw,bh,Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mBitmapPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
}
public MyView (Context c, int color) {
super(c);
mBitmap = Bitmap.createScaledBitmap(originalBitmap,bw,bh,true);
mCanvas = new Canvas(mBitmap);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mBitmapPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC)) ;
mCanvas.drawColor(color);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
/*mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);*/
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.TRANSPARENT);
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
}
用于删除油漆
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
答案 0 :(得分:6)
您应该在放置在原始位图上的透明自定义视图上绘制,而不是修改orignal。这将保持简单。 为此你可以做到
<RelativeLayout ....>
<ImageView ......set original bitmap to this/>
<CustomView ...... draw on this, you can erase too./>
</RelativeLayout>
要获取修改后的位图,请在getDrawingCache()
上调用RelativeLayout
方法。这将为您提供组合的位图图像。
希望这有帮助。
答案 1 :(得分:0)
定义一个临时位图和画布,然后在该临时位图上绘制画布并将该位图传递给onDraw,您的工作将完成,