我将ShapeDrawable用于LinearLayouts背景。形状是由鳕鱼制成的,因为我需要根据条件为它们动态分配颜色。
这是我的自定义形状
public class CustomShapeDrawable extends ShapeDrawable {
private final Paint fillpaint, strokepaint, linePaint = new Paint();
private int strokeWidth = 3;
private final boolean disableBottomBorder;
public CustomShapeDrawable(Shape s, int fill, int stroke, int strokewidth, boolean disablebottomborder) {
super(s);
fillpaint = new Paint(this.getPaint());
fillpaint.setColor(fill);
strokepaint = new Paint(fillpaint);
strokepaint.setStyle(Paint.Style.STROKE);
strokepaint.setStrokeWidth(strokewidth);
strokepaint.setColor(stroke);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setStrokeWidth(strokewidth + 1);
linePaint.setColor(fill);
strokeWidth = strokewidth;
disableBottomBorder = disablebottomborder;
}
public CustomShapeDrawable(Shape s, int fill, int stroke, boolean disablebottomborder) {
super(s);
fillpaint = new Paint(this.getPaint());
fillpaint.setColor(fill);
strokepaint = new Paint(fillpaint);
strokepaint.setStyle(Paint.Style.STROKE);
strokepaint.setStrokeWidth(strokeWidth);
strokepaint.setColor(stroke);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setStrokeWidth(strokeWidth + 1);
linePaint.setColor(fill);
disableBottomBorder = disablebottomborder;
}
@Override
protected void onDraw(Shape shape, Canvas canvas, Paint paint) {
shape.resize(canvas.getClipBounds().right, canvas.getClipBounds().bottom);
shape.draw(canvas, fillpaint);
Matrix matrix = new Matrix();
matrix.setRectToRect(new RectF(0, 0, canvas.getClipBounds().right, canvas.getClipBounds().bottom), new RectF(strokeWidth / 2, strokeWidth / 2, canvas.getClipBounds().right - strokeWidth / 2,
canvas.getClipBounds().bottom - strokeWidth / 2), Matrix.ScaleToFit.FILL);
canvas.concat(matrix);
shape.draw(canvas, strokepaint);
if (disableBottomBorder) {
canvas.drawLine(0 + strokeWidth/2, shape.getHeight(), shape.getWidth() - strokeWidth/2, shape.getHeight(), linePaint);
}
}
对于我的布局,此CustomShapeDrawable用作StateListDrawable,如下所示:
RoundRectShape shapeTopCorners = new RoundRectShape(new float[] { 10, 10, 10, 10, 0, 0, 0, 0 }, null, null);
ShapeDrawable shapeTopCornersNormal =
new CustomShapeDrawable(shapeTopCorners, Global.getFleet().getSkins().getBackgroundcolour(), context.getResources().getColor(R.color.item_line), true);
ShapeDrawable shapeTopCornersPressed =
new CustomShapeDrawable(shapeTopCorners, context.getResources().getColor(R.color.menu_grey), context.getResources().getColor(R.color.item_line), true);
StateListDrawable stateTopCornersRounded = new StateListDrawable();
stateTopCornersRounded.addState(new int[] { android.R.attr.state_focused }, shapeTopCornersPressed);
stateTopCornersRounded.addState(new int[] { android.R.attr.state_pressed }, shapeTopCornersPressed);
stateTopCornersRounded.addState(new int[] {}, shapeTopCornersNormal);
一切看起来都不错,布局与我想要的颜色具有相同的形状。当屏幕上出现另一个元素,例如Keyboard或AlertDialog时,就会发生丑陋的事情。当我的应用再次获得焦点时,布局变得疯狂,上面有随机的线条和伪像。
这是我的意思:
当看起来很丑陋时,我可以采取哪些措施来防止或修复这些假象。我不知道为什么会首先发生这种情况。感谢您为我提供的任何帮助。
最佳答案
没有任何建议,目前可以解决的唯一问题是:
-我在 Activity 中创建了一个名为invalidate()的方法,对于要刷新的所有布局,我都添加了layoutId.invalidate()
-每当显示警报对话框时,请调用invalidate()
-对于所有EditText onFocusChanged或onTextChanged,请调用invalidate()
这不是一个符合人体工程学的解决方案,但它似乎目前可以使用。
关于android - Android中ShapeDrawable的烦人行为,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/10330509/