画布中的背景（图像），同时在顶部绘制路径
@Override protected void onDraw(Canvas canvas) {
if (mBitmap != null) {
canvas.drawColor(0xFFAAAAAA);
canvas.drawBitmap(background,0,0,mBitmapPaint);
if(isRelevant){
canvas.drawBitmap(mBitmapLast, 0,0, mBitmapLastPaint);
}
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
}
}
我尝试过切换线条
canvas.drawColor(0xFFAAAAAA);
canvas.drawBitmap(background,0,0,mBitmapPaint);
，当 canvas.drawColor(0xFFAAAAAA); 是第二个时，当我在屏幕上绘制它们时，我的路径就会显示出来。有没有办法使背景（位图）显示在画布路径下方？
@Override protected void onDraw(Canvas canvas) {
if (mBitmap != null) {
canvas.drawColor(0xFFAAAAAA);
canvas.drawBitmap(background,0,0,mBitmapPaint);
if(isRelevant){
canvas.drawBitmap(mBitmapLast, 0,0, mBitmapLastPaint);
}
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
}
}
I've tried switching around the lines
canvas.drawColor(0xFFAAAAAA);
canvas.drawBitmap(background,0,0,mBitmapPaint);
and when canvas.drawColor(0xFFAAAAAA); is second, my paths will show up when I draw them on the screen. Is there a way to make the background (bitmap) show underneath the canvas paths?
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尝试设置 Xfermode在你的路径的油漆中：
并参见 PorterDuff .Mode 解释。
Try setting the Xfermode in your Path's paint:
and see PorterDuff.Mode explained.