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赣州网站建设案例,游戏推广在哪里接活,做网站推广价格,购物网站开发方案自定义label组件 支持边框绘制 支持shape背景(按指定圆角裁剪,矩形,圆角矩,圆形),支持指定角圆角 支持自定义阴影(颜色,偏移,深度) 边框颜色支持状态选择器 预览 核心绘制辅助类 public class LabelHelper {private final Paint paint;private Paint shadowPaint;private fina…

自定义label组件

支持边框绘制
支持shape背景(按指定圆角裁剪,矩形,圆角矩,圆形),支持指定角圆角
支持自定义阴影(颜色,偏移,深度)
边框颜色支持状态选择器

预览

在这里插入图片描述

核心绘制辅助类
public class LabelHelper {private final Paint paint;private Paint shadowPaint;private final float[] radiusList = new float[8];// 矩阵四角圆角 两个一组分别为一角的x轴半径y轴半径  四组分别为 上左 上右  下右  下左private final Rect rect;private final Path path;private final RectF rectF;private float strokeWidth;private ColorStateList strokeColor;private boolean hasRadius;//是否有圆角private int shadowColor;//是否有阴影private float shadowRadius;private float shadowDx;private float shadowDy;private Float contentInsetLeft = null;private Float contentInsetRight = null;private int defStrokeColor;LabelHelper(View view, Context context, AttributeSet attrs) {this(view, context, attrs, Color.TRANSPARENT);}LabelHelper(View view, Context context, AttributeSet attrs, @ColorInt int defStrokeColor) {this.defStrokeColor = defStrokeColor;TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.LabelView);// 圆角float radius = array.getDimension(R.styleable.LabelView_android_radius, 0);float topLeftRadius = array.getDimension(R.styleable.LabelView_android_topLeftRadius, radius);float topRightRadius = array.getDimension(R.styleable.LabelView_android_topRightRadius, radius);float bottomLeftRadius = array.getDimension(R.styleable.LabelView_android_bottomLeftRadius, radius);float bottomRightRadius = array.getDimension(R.styleable.LabelView_android_bottomRightRadius, radius);// 阴影int shadowColor = array.getColor(R.styleable.LabelView_android_shadowColor, Color.TRANSPARENT);float shadowRadius = array.getFloat(R.styleable.LabelView_android_shadowRadius, 0.0f);float shadowDx = array.getFloat(R.styleable.LabelView_android_shadowDx, 0.0f);float shadowDy = array.getFloat(R.styleable.LabelView_android_shadowDy, 0.0f);if (array.hasValue(R.styleable.LabelView_android_contentInsetLeft)) {contentInsetLeft = array.getDimension(R.styleable.LabelView_android_contentInsetLeft, 0);}if (array.hasValue(R.styleable.LabelView_android_contentInsetRight)) {contentInsetRight = array.getDimension(R.styleable.LabelView_android_contentInsetRight, 0);}int anInt = array.getInt(R.styleable.LabelView_fillType, 1);// 边框strokeWidth = array.getDimension(R.styleable.LabelView_borderWidth, 0);try {strokeColor = array.getColorStateList(R.styleable.LabelView_borderColor);} catch (Exception e) {e.printStackTrace();}if (strokeColor == null) {strokeColor = ColorStateList.valueOf(array.getColor(R.styleable.LabelView_borderColor, this.defStrokeColor));}view.setSelected(array.getBoolean(R.styleable.LabelView_selected, false));array.recycle();paint = new Paint();paint.setAntiAlias(true);paint.setStyle(getPaintStyle(anInt));paint.setStrokeWidth(strokeWidth);rectF = new RectF();rect = new Rect();path = new Path();setRadiusPx(view, topLeftRadius, topRightRadius, bottomRightRadius, bottomLeftRadius);view.setLayerType(LAYER_TYPE_HARDWARE, null);setShadow(shadowColor, shadowRadius, shadowDx, shadowDy);}// 设置阴影画笔private void setShadow(int shadowColor, float shadowRadius, float shadowDx, float shadowDy) {if (shadowPaint == null) {shadowPaint = new Paint();shadowPaint.setAntiAlias(true);shadowPaint.setStyle(Paint.Style.FILL);}this.shadowRadius = Math.max(shadowRadius, 0);this.shadowDx = shadowDx;this.shadowDy = shadowDy;this.shadowColor = shadowColor;shadowPaint.setColor(shadowColor);shadowPaint.setShadowLayer(this.shadowRadius, this.shadowDx, this.shadowDy, shadowColor);}private Paint.Style getPaintStyle(int type) {return switch (type) {case 0 -> Paint.Style.FILL;case 2 -> Paint.Style.FILL_AND_STROKE;default -> Paint.Style.STROKE;};}void setStrokeWidth(int dp) {strokeWidth = SizeUtils.dp2px(dp);paint.setStrokeWidth(strokeWidth);}void setStrokeColor(@ColorInt int boundColor) {this.strokeColor = ColorStateList.valueOf(boundColor);}void setFillType(Paint.Style style) {paint.setStyle(style);}void setRadiusPx(View view, float topLeft, float topRight, float bottomRight, float bottomLeft) {radiusList[0] = topLeft;radiusList[1] = topLeft;radiusList[2] = topRight;radiusList[3] = topRight;radiusList[4] = bottomRight;radiusList[5] = bottomRight;radiusList[6] = bottomLeft;radiusList[7] = bottomLeft;hasRadius = topLeft > 0 || topRight > 0 || bottomRight > 0 || bottomLeft > 0;float offsetPaddingL = 0;float offsetPaddingR = 0;float offsetPaddingT = 0;float offsetPaddingB = 0;boolean autoInsetLeft = contentInsetLeft == null;boolean autoInsetRight = contentInsetRight == null;if (hasRadius) {if (autoInsetLeft) {offsetPaddingL = Math.max(topLeft, bottomLeft) / 2f;} else if (contentInsetLeft != 0) {offsetPaddingL = contentInsetLeft;}if (autoInsetRight) {offsetPaddingR = Math.max(topRight, bottomRight) / 2f;} else if (contentInsetRight != 0) {offsetPaddingR = contentInsetRight;}}if (isDrawBorder(view)) {offsetPaddingL = Math.max(offsetPaddingL, strokeWidth);offsetPaddingR = Math.max(offsetPaddingL, strokeWidth);offsetPaddingT = strokeWidth;offsetPaddingB = strokeWidth;}view.setPadding((int) Math.max(view.getPaddingLeft(), offsetPaddingL),(int) Math.max(view.getPaddingTop(), offsetPaddingT),(int) Math.max(view.getPaddingRight(), offsetPaddingR),(int) Math.max(view.getPaddingBottom(), offsetPaddingB));setStroke();view.invalidate();}private void setStroke() {if (hasRadius) {paint.setStrokeCap(Paint.Cap.ROUND);paint.setStrokeJoin(Paint.Join.ROUND);} else {paint.setStrokeCap(Paint.Cap.BUTT);paint.setStrokeJoin(Paint.Join.MITER);}}void draw(Canvas canvas, View view) {boolean drawBorder = isDrawBorder(view);boolean isDrawShadow = isDrawShadow();if (hasRadius || drawBorder || isDrawShadow) {view.getDrawingRect(rect);path.reset();rectF.set(rect);path.addRoundRect(rectF, radiusList, Path.Direction.CW);path.close();if (isDrawShadow) {// 绘制阴影canvas.drawPath(path, shadowPaint);path.reset();rectF.left += Math.max(shadowRadius - shadowDx, 0);rectF.right -= Math.max(shadowRadius + shadowDx, 0);rectF.top += Math.max(shadowRadius - shadowDy, 0);rectF.bottom -= Math.max(shadowRadius + shadowDy, 0);path.addRoundRect(rectF, radiusList, Path.Direction.CW);path.close();}if (hasRadius && !(drawBorder && paint.getStyle() != Paint.Style.STROKE)) {// 形状裁剪canvas.clipPath(path);}}}void onDraw(Canvas canvas, View view) {if (isDrawBorder(view)) {Paint.Style style = paint.getStyle();if (style != Paint.Style.STROKE) {canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);}paint.setColor(getBoundColor(view));canvas.save();if (style != Paint.Style.FILL) {path.reset();rectF.left += (strokeWidth / 2f - 0.5f);rectF.top += (strokeWidth / 2f - 0.5f);rectF.right -= strokeWidth / 2f;rectF.bottom -= strokeWidth / 2f;path.addRoundRect(rectF, radiusList, Path.Direction.CW);path.close();}// 边框绘制canvas.drawPath(path, paint);canvas.restore();}}Paint getPaint() {return paint;}public Rect getRect() {return rect;}public Path getPath() {return path;}public RectF getRectF() {return rectF;}public float getStrokeWidth() {return strokeWidth;}public boolean isHasRadius() {return hasRadius;}private int getBoundColor(View view) {int color = this.defStrokeColor;if (strokeColor != null) {if (strokeColor.isStateful()) {color = strokeColor.getColorForState(view.getDrawableState(), strokeColor.getDefaultColor());} else {color = strokeColor.getDefaultColor();}}return color;}private boolean isDrawBorder(View view) {return strokeWidth > 0 && getBoundColor(view) != Color.TRANSPARENT;}private boolean isDrawShadow() {return shadowPaint != null && shadowColor != Color.TRANSPARENT && shadowRadius > 0;}
}
自定义控件示例
public class LabelFrameLayout extends FrameLayout {private LabelHelper helper;public LabelFrameLayout(Context context) {this(context, null);}public LabelFrameLayout(Context context, AttributeSet attrs) {this(context, attrs, 0);}public LabelFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);setWillNotDraw(false);helper = new LabelHelper(this, context, attrs);}public void setFillType(Paint.Style style) {if (helper != null && helper.getPaint() != null) {helper.setFillType(style);invalidate();}}public void setStrokeColor(@ColorInt int boundColor) {if (helper != null) {helper.setStrokeColor(boundColor);invalidate();}}public void setStrokeColorRes(@ColorRes int colorRes) {if (helper != null) {helper.setStrokeColor(getResources().getColor(colorRes));invalidate();}}public void setStrokeWidth(int dp) {if (helper != null && helper.getPaint() != null) {helper.setStrokeWidth(dp);invalidate();}}public void setRadius(int radiusDp) {setRadiusPx(SizeUtils.dp2px(radiusDp));}public void setRadiusPx(float radius) {setRadiusPx(radius, radius, radius, radius);}public void setRadius(float topLeft, float topRight, float bottomRight, float bottomLeft) {setRadiusPx(SizeUtils.dp2px(topLeft), SizeUtils.dp2px(topRight), SizeUtils.dp2px(bottomRight), SizeUtils.dp2px(bottomLeft));}public void setRadiusPx(float topLeft, float topRight, float bottomRight, float bottomLeft) {if (helper != null) {helper.setRadiusPx(this, topLeft, topRight, bottomRight, bottomLeft);}}@Overridepublic void invalidate() {if (isLaidOut()) {super.invalidate();}}@Overridepublic void draw(Canvas canvas) {if (helper != null) {helper.draw(canvas, this);}super.draw(canvas);}@Overrideprotected void onDraw(Canvas canvas) {if (helper != null) {helper.onDraw(canvas, this);}super.onDraw(canvas);}
}
xml使用示例
<包名.LabelFrameLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="100dp"android:layout_marginBottom="10dp"android:background="@color/subColorGray"app:borderColor="@color/red"app:borderWidth="1dp"android:radius="20dp"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="阿迪斯发斯蒂芬" /></包名.LabelFrameLayout>
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