我创建一个类扩展 LinearLayout 我想像这样显示一个矩形:
--------------------- => it is round corner
| border frame | .
| ----------------- | .
| | hearder | | .
| | - - - - - - - | | .
| | center | | .
| | | | .
| | - - - - - - - | | .
| | buttom | | .
| ---------------- | .
| | .
---------------------- .
. . . . . . . . . . . => it is shadow
我使用了 paintShadow.setShadowLayer(this.radius, 8, 8, Color.GRAY);影子不是圆的。
所以谁知道如何制作圆形矩形和阴影。 代码:
@SuppressLint("DrawAllocation")
public class CornerLinearLayout extends LinearLayout{
public CornerLinearLayout(Context context,AttributeSet attr){
super(context,attr);
init();
}
public CornerLinearLayout(Context context) {
super(context);
init();
// TODO Auto-generated constructor stub
}
private static final int RADIUS=10;
private int frameColor;
private int radius;
private Path mClip;
private int frameWidth;
private int headerHeight;
private int buttomHeight;
private int headerColor;
private int buttomColor;
private int centerColor;
private void init() {
this.radius = RADIUS;
this.frameColor = 0xFFFFFFFF;
this.frameWidth = 4;
this.headerHeight = 50;
this.buttomHeight = 50;
headerColor = 0xFF31234A;
buttomColor = 0xFF9ACFFF;
centerColor = 0xFF55AACC;
this.setBackgroundColor(0);
// GradientDrawable gd = new GradientDrawable();
// gd.setStroke(frameWidth, frameColor);
// gd.setCornerRadius(radius);
// gd.setColor(0);
// //gd.setStroke(30, 0xFFFFFFFF);
//
// setBackgroundDrawable(gd);
this.setPadding(frameWidth, frameWidth, frameWidth,frameWidth);
// LinearLayout.LayoutParams params = (LayoutParams) this.getLayoutParams();
// params.setMargins(25, 10, 25, 10);
}
private Paint paintShadow = new Paint();
private Paint paint = new Paint();
public void onDraw(Canvas canvas){
super.onDraw(canvas);
RectF rf = new RectF(0,0,this.getWidth()-10,this.getHeight()-5);
paintShadow.setShadowLayer(this.radius, 8, 8, Color.GRAY);
rf.right -= 3;
rf.bottom -= 3;
paintShadow.setColor(this.frameColor);
paintShadow.setStrokeWidth(5);
canvas.drawRoundRect(rf,this.radius,this.radius, paintShadow);
paint.setStyle(Paint.Style.FILL);
// Rect r = new Rect(5,5,this.getWidth()-5,this.getHeight()-5);
if(this.centerColor != 0){
paint.setColor(this.centerColor);
// canvas.drawRect(r, paint);
rf.right -= 5;
rf.left += 5;
rf.top += 5;
rf.bottom -=5;
canvas.drawRoundRect(rf, this.radius, this.radius, paint);
}
// if(this.headerColor!=0){
// Rect rr = new Rect(10,10,this.getWidth()-5,this.headerHeight-10);
// paint.setColor(this.headerColor);
// canvas.drawRect(rr, paint);
// }
// if(this.buttomColor != 0){
// Rect rr = new Rect(10,this.getHeight()-this.buttomHeight,this.getWidth()-3,this.buttomHeight-3);
// paint.setColor(this.headerColor);
// canvas.drawRect(rr, paint);
// }
//
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mClip = new Path();
RectF rect = new RectF(0, 0, w, h);
mClip.addRoundRect(rect, this.radius, this.radius, Direction.CW);
}
@Override
protected void dispatchDraw(Canvas canvas) {
canvas.save();
canvas.clipPath(mClip);
super.dispatchDraw(canvas);
canvas.restore();
}
}
最佳答案
我敢打赌您的问题出在使用 clipPath() 上。尝试在 View 中禁用硬件加速，我想您会发现它会按预期工作。
在你的 init() 方法中:
setLayerType(LAYER_TYPE_SOFTWARE, null);
有用的链接:
关于Android如何绘制圆形矩形和阴影Layout，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14534512/