我准备了一个涂料app.in我的应用程序,我们可以绘制任何东西。它工作正常。在这里我要准备手指擦除擦除paint.Eraser工作,但它是橡皮擦所有绘制paint.I想橡皮擦只有当我联系,如果抽漆是有,我写了一些代码,如何在android中使用手指橡皮擦?
这是我的OnDraw方法,
public void onDraw(Canvas canvas) {
if (myDrawBitmap == null) {
myDrawBitmap = Bitmap.createBitmap(480, 800,
Bitmap.Config.ARGB_8888);
mBmpDrawCanvas = new Canvas(myDrawBitmap);
mIntDrawArray = new int[myDrawBitmap.getWidth()
* myDrawBitmap.getHeight()];
}
if (mBmpDrawCanvas != null) {
myDrawBitmap.getPixels(mIntDrawArray, 0, myDrawBitmap.getWidth(),
0, 0, myDrawBitmap.getWidth(), myDrawBitmap.getHeight());
for (Path path : ILearnPaintActivity.mArryLstPath) {
if (ILearnPaintActivity.mArryLstPath.contains(path)
&& ILearnPaintActivity.paintAndEraserFlag == 1) {
mPaint.setXfermode(new PorterDuffXfermode(
PorterDuff.Mode.CLEAR));
mBmpDrawCanvas.drawPath(ILearnPaintActivity.mPath, mPaint);
} else {
mBmpDrawCanvas.drawPath(ILearnPaintActivity.mPath, mPaint);
}
}
if (myDrawBitmap != null)
canvas.drawBitmap(myDrawBitmap, 0, 0, null);
}
}
平局油漆工作fine.In相同的活动,我有一个按钮,“橡皮擦”。当我们点击橡皮按钮我分配标志的区别。请帮助我如何做到这一点...
已经我试着用透明颜色它不工作 – 2012-03-16 08:23:12