源码地址：心形图片、心形ImageView、圆形图片、圆形ImageView
实际效果如下：
一、思路
1、图片尺寸：加载的图片尺寸不会完全统一，可以是正方形，长方形等，这里不需要考虑正方形，因为一般的头像是正方形，需要考虑的是长方形，需要取长方形中边长的最大的居中的正方形，否则会拉伸，不好看。
2、心形边框：可以通过画笔或者一个心形的图片
3、细节：心形边框覆盖在图片上，并且只显示心形里面的部分图片，心形以外的图片不显示
二、实现
结合思路中第二点和第三点，心形边框部分不可以使用心形边框图片遮盖图片。因为这样限制性太大，不同背景颜色的页面需要做对应颜色的心形边框图片。这样太费劲了，不能这么做。我们很懒！！！
那么，我们需要自定义view用画笔 paint 来绘制一个心形边框，并且需要满足“心形边框覆盖在图片上，并且只显示心形里面的部分图片，心形以外的图片不显示”这样的需求。
涉及技术关键词：
贝赛尔曲线 ： 参考 安卓自定义View进阶-Path之贝塞尔曲线 学习贝塞尔曲线的基础用法和适用场景
Paint Xfermode ：参考 Android Paint Xfermode 学习paint.setXfermode的用途
三、代码
attrs.xml
-
<?xml version="1.0" encoding="utf-8"?>
-
<resources>
-
<declare-styleable name="heartimageview">
-
<attr name="border_size" format="dimension" />
-
<attr name="in_border_color" format="color" />
-
<attr name="out_border_color" format="color"/>
-
<attr name="shape_type" format="string"/>
-
</declare-styleable>
-
-
<declare-styleable name="CircleImageView">
-
<attr name="civ_border_width" format="dimension" />
-
<attr name="civ_border_color" format="color" />
-
<attr name="civ_border_overlay" format="boolean" />
-
<attr name="civ_circle_background_color" format="color" />
-
</declare-styleable>
-
</resources>
HeartImageView.java
-
/**
-
* 心形ImageView 可以设置边框
-
* @author DerekYan
-
*/
-
public
class HeartImageView extends ImageView {
-
-
private Context mContext;
-
-
private
int border_size =
0;
// 边框厚度
-
private
int in_border_color =
0;
// 内圆边框颜色
-
private
int out_border_color =
0;
// 外圆边框颜色
-
private
int defColor =
0xFFFFFFFF;
// 默认颜色
-
-
private
int width =
0;
// 控件的宽度
-
private
int height =
0;
// 控件的高度
-
-
private String shape_type;
// 形状的类型
-
-
public HeartImageView(Context context) {
-
super(context);
-
// TODO Auto-generated constructor stub
-
this.mContext = context;
-
}
-
-
public HeartImageView(Context context, AttributeSet attrs) {
-
super(context, attrs);
-
// TODO Auto-generated constructor stub
-
this.mContext = context;
-
setAttributes(attrs);
-
}
-
-
public HeartImageView(Context context, AttributeSet attrs, int defStyle) {
-
super(context, attrs, defStyle);
-
// TODO Auto-generated constructor stub
-
this.mContext = context;
-
setAttributes(attrs);
-
}
-
-
/**
-
* 获得自定义属性
-
*
-
* @param attrs
-
*/
-
private void setAttributes(AttributeSet attrs) {
-
// TODO Auto-generated method stub
-
TypedArray mArray = mContext.obtainStyledAttributes(attrs,
-
R.styleable.heartimageview);
-
// 得到边框厚度，否则返回0
-
border_size = mArray.getDimensionPixelSize(
-
R.styleable.heartimageview_border_size,
0);
-
// 得到内边框颜色，否则返回默认颜色
-
in_border_color = mArray.getColor(
-
R.styleable.heartimageview_in_border_color, defColor);
-
// 得到外边框颜色，否则返回默认颜色
-
out_border_color = mArray.getColor(
-
R.styleable.heartimageview_out_border_color, defColor);
-
// 得到形状的类型
-
shape_type = mArray.getString(R.styleable.heartimageview_shape_type);
-
-
mArray.recycle();
// 回收mArray
-
}
-
-
@Override
-
protected void onDraw(Canvas canvas) {
-
// TODO Auto-generated method stub
-
// super.onDraw(canvas); 必须去掉该行或注释掉，否则会出现两张图片
-
// 得到传入的图片
-
Drawable drawable = getDrawable();
-
if (drawable ==
null) {
-
return;
-
}
-
if (getWidth() ==
0 || getHeight() ==
0) {
-
return;
-
}
-
this.measure(
0,
0);
-
if (drawable.getClass() == NinePatchDrawable.class) {
// 如果该传入图片是.9格式的图片
-
return;
-
}
-
-
// 将图片转为位图
-
Bitmap mBitmap = ((BitmapDrawable) drawable).getBitmap();
-
-
Bitmap cpBitmap = mBitmap.copy(Bitmap.Config.ARGB_8888,
true);
-
// 得到画布宽高
-
width = getWidth();
-
height = getHeight();
-
//
-
int radius =
0;
//
-
-
radius = (width < height ? width : height) /
2;
-
//
-
Bitmap shapeBitmap = drawShapeBitmap(cpBitmap, radius);
-
canvas.drawBitmap(shapeBitmap, width /
2 - radius, height /
2 - radius,
-
null);
-
-
}
-
-
/**
-
* 画出指定形状的图片
-
*
-
* @param radius
-
* @return
-
*/
-
private Bitmap drawShapeBitmap(Bitmap bmp, int radius) {
-
// TODO Auto-generated method stub
-
Bitmap squareBitmap;
// 根据传入的位图截取合适的正方形位图
-
Bitmap scaledBitmap;
// 根据diameter对截取的正方形位图进行缩放
-
Log.i(
"HeartImageView",
"radius:" + radius);
-
int diameter = radius *
2;
-
// 位图的宽高
-
int w = bmp.getWidth();
-
int h = bmp.getHeight();
-
// 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片
-
-
squareBitmap = bmp;
-
// 对squareBitmap进行缩放为diameter边长的正方形位图
-
if (w != diameter
-
|| h != diameter) {
-
-
if (w < diameter || h < diameter) {
-
//位图宽高没有ImageView的宽高大 需要放大
-
float scale;
//缩放倍数
-
scale =
1f * diameter / (Math.min(w, h));
-
Matrix matrix =
new Matrix();
-
matrix.postScale(scale,scale);
-
-
squareBitmap = Bitmap.createBitmap(squareBitmap,
0,
0,w,h,matrix,
false);
-
-
if (w != h) {
-
//从矩形图中截取正中间的正方形部分。
-
scaledBitmap = centerSquareScaleBitmap(squareBitmap, diameter);
-
}
else {
-
scaledBitmap = squareBitmap;
-
}
-
}
else {
-
//从矩形图中截取正中间的正方形部分。
-
scaledBitmap = centerSquareScaleBitmap(squareBitmap, diameter);
-
}
-
}
else {
-
scaledBitmap = squareBitmap;
-
}
-
-
-
Bitmap outputbmp = Bitmap.createBitmap(scaledBitmap.getWidth(),
-
scaledBitmap.getHeight(), Config.ARGB_8888);
-
Canvas canvas =
new Canvas(outputbmp);
// 创建一个相同大小的画布
-
Paint paint =
new Paint();
// 定义画笔
-
paint.setAntiAlias(
true);
// 设置抗锯齿
-
paint.setFilterBitmap(
true);
-
paint.setDither(
true);
-
canvas.drawARGB(
0,
0,
0,
0);
-
-
//设置边框
-
Paint borderPaint =
new Paint(Paint.ANTI_ALIAS_FLAG);
-
borderPaint.setColor(out_border_color);
-
borderPaint.setStyle(Paint.Style.STROKE);
-
borderPaint.setStrokeWidth(border_size);
-
-
Path path =
new Path();
-
-
//右心形
-
path.moveTo(diameter /
2f, diameter /
7f);
-
path.cubicTo((diameter /
6f) *
5 ,
0 - ( diameter /
5f), (diameter /
5f) *
7 , (diameter /
5f) *
2 , diameter /
2f, diameter- border_size );
-
//左心形
-
path.moveTo(diameter /
2f, diameter /
7f);
-
path.cubicTo(diameter /
6f ,
0 - ( diameter /
5f),
0 - (diameter /
5f) *
2, (diameter /
5f) *
2, diameter /
2f, diameter - border_size );
-
-
canvas.drawPath(path, paint);
-
-
-
// 设置Xfermode的Mode
-
paint.setXfermode(
new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
-
canvas.drawBitmap(scaledBitmap,
0,
0, paint);
-
-
canvas.drawPath(path, borderPaint);
-
-
bmp =
null;
-
squareBitmap =
null;
-
scaledBitmap =
null;
-
-
return outputbmp;
-
-
}
-
-
/**
-
-
* @param bitmap 原图
-
* @param edgeLength 希望得到的正方形部分的边长
-
* @return 缩放截取正中部分后的位图。
-
*/
-
public static Bitmap centerSquareScaleBitmap(Bitmap bitmap, int edgeLength)
-
{
-
if(
null == bitmap || edgeLength <=
0)
-
{
-
return
null;
-
}
-
-
Bitmap result = bitmap;
-
int widthOrg = bitmap.getWidth();
-
int heightOrg = bitmap.getHeight();
-
-
if(widthOrg > edgeLength && heightOrg > edgeLength)
-
{
-
//压缩到一个最小长度是edgeLength的bitmap
-
int longerEdge = (
int)(edgeLength * Math.max(widthOrg, heightOrg) / Math.min(widthOrg, heightOrg));
-
int scaledWidth = widthOrg > heightOrg ? longerEdge : edgeLength;
-
int scaledHeight = widthOrg > heightOrg ? edgeLength : longerEdge;
-
Bitmap scaledBitmap;
-
-
try{
-
scaledBitmap = Bitmap.createScaledBitmap(bitmap, scaledWidth, scaledHeight,
true);
-
}
-
catch(Exception e){
-
return
null;
-
}
-
-
//从图中截取正中间的正方形部分。
-
int xTopLeft = (scaledWidth - edgeLength) /
2;
-
int yTopLeft = (scaledHeight - edgeLength) /
2;
-
-
try{
-
result = Bitmap.createBitmap(scaledBitmap, xTopLeft, yTopLeft, edgeLength, edgeLength);
-
scaledBitmap.recycle();
-
}
-
catch(Exception e){
-
return
null;
-
}
-
}
-
-
return result;
-
}
-
-
}
CircleImageView.java
-
public
class CircleImageView extends ImageView {
-
-
private
static
final ImageView.ScaleType SCALE_TYPE = ImageView.ScaleType.CENTER_CROP;
-
-
private
static
final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
-
private
static
final
int COLORDRAWABLE_DIMENSION =
2;
-
-
private
static
final
int DEFAULT_BORDER_WIDTH =
0;
-
private
static
final
int DEFAULT_BORDER_COLOR = Color.BLACK;
-
private
static
final
int DEFAULT_CIRCLE_BACKGROUND_COLOR = Color.TRANSPARENT;
-
private
static
final
int DEFAULT_IMAGE_ALPHA =
255;
-
private
static
final
boolean DEFAULT_BORDER_OVERLAY =
false;
-
-
private
final RectF mDrawableRect =
new RectF();
-
private
final RectF mBorderRect =
new RectF();
-
-
private
final Matrix mShaderMatrix =
new Matrix();
-
private
final Paint mBitmapPaint =
new Paint();
-
private
final Paint mBorderPaint =
new Paint();
-
private
final Paint mCircleBackgroundPaint =
new Paint();
-
-
private
int mBorderColor = DEFAULT_BORDER_COLOR;
-
private
int mBorderWidth = DEFAULT_BORDER_WIDTH;
-
private
int mCircleBackgroundColor = DEFAULT_CIRCLE_BACKGROUND_COLOR;
-
private
int mImageAlpha = DEFAULT_IMAGE_ALPHA;
-
-
private Bitmap mBitmap;
-
private Canvas mBitmapCanvas;
-
-
private
float mDrawableRadius;
-
private
float mBorderRadius;
-
-
private ColorFilter mColorFilter;
-
-
private
boolean mInitialized;
-
private
boolean mRebuildShader;
-
private
boolean mDrawableDirty;
-
-
private
boolean mBorderOverlay;
-
private
boolean mDisableCircularTransformation;
-
-
public CircleImageView(Context context) {
-
super(context);
-
-
init();
-
}
-
-
public CircleImageView(Context context, AttributeSet attrs) {
-
this(context, attrs,
0);
-
}
-
-
public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
-
super(context, attrs, defStyle);
-
-
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle,
0);
-
-
mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_civ_border_width, DEFAULT_BORDER_WIDTH);
-
mBorderColor = a.getColor(R.styleable.CircleImageView_civ_border_color, DEFAULT_BORDER_COLOR);
-
mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_civ_border_overlay, DEFAULT_BORDER_OVERLAY);
-
mCircleBackgroundColor = a.getColor(R.styleable.CircleImageView_civ_circle_background_color, DEFAULT_CIRCLE_BACKGROUND_COLOR);
-
-
a.recycle();
-
-
init();
-
}
-
-
private void init() {
-
mInitialized =
true;
-
-
super.setScaleType(SCALE_TYPE);
-
-
mBitmapPaint.setAntiAlias(
true);
-
mBitmapPaint.setDither(
true);
-
mBitmapPaint.setFilterBitmap(
true);
-
mBitmapPaint.setAlpha(mImageAlpha);
-
mBitmapPaint.setColorFilter(mColorFilter);
-
-
mBorderPaint.setStyle(Paint.Style.STROKE);
-
mBorderPaint.setAntiAlias(
true);
-
mBorderPaint.setColor(mBorderColor);
-
mBorderPaint.setStrokeWidth(mBorderWidth);
-
-
mCircleBackgroundPaint.setStyle(Paint.Style.FILL);
-
mCircleBackgroundPaint.setAntiAlias(
true);
-
mCircleBackgroundPaint.setColor(mCircleBackgroundColor);
-
-
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-
setOutlineProvider(
new OutlineProvider());
-
}
-
}
-
-
@Override
-
public void setScaleType(ImageView.ScaleType scaleType) {
-
if (scaleType != SCALE_TYPE) {
-
throw
new IllegalArgumentException(String.format(
"ScaleType %s not supported.", scaleType));
-
}
-
}
-
-
@Override
-
public void setAdjustViewBounds(boolean adjustViewBounds) {
-
if (adjustViewBounds) {
-
throw
new IllegalArgumentException(
"adjustViewBounds not supported.");
-
}
-
}
-
-
@SuppressLint(
"CanvasSize")
-
@Override
-
protected void onDraw(Canvas canvas) {
-
if (mDisableCircularTransformation) {
-
super.onDraw(canvas);
-
return;
-
}
-
-
if (mCircleBackgroundColor != Color.TRANSPARENT) {
-
canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mCircleBackgroundPaint);
-
}
-
-
if (mBitmap !=
null) {
-
if (mDrawableDirty && mBitmapCanvas !=
null) {
-
mDrawableDirty =
false;
-
Drawable drawable = getDrawable();
-
drawable.setBounds(
0,
0, mBitmapCanvas.getWidth(), mBitmapCanvas.getHeight());
-
drawable.draw(mBitmapCanvas);
-
}
-
-
if (mRebuildShader) {
-
mRebuildShader =
false;
-
-
BitmapShader bitmapShader =
new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
-
bitmapShader.setLocalMatrix(mShaderMatrix);
-
-
mBitmapPaint.setShader(bitmapShader);
-
}
-
-
canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mBitmapPaint);
-
}
-
-
if (mBorderWidth >
0) {
-
canvas.drawCircle(mBorderRect.centerX(), mBorderRect.centerY(), mBorderRadius, mBorderPaint);
-
}
-
}
-
-
@Override
-
public void invalidateDrawable(@NonNull Drawable dr) {
-
mDrawableDirty =
true;
-
invalidate();
-
}
-
-
@Override
-
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
-
super.onSizeChanged(w, h, oldw, oldh);
-
updateDimensions();
-
invalidate();
-
}
-
-
@Override
-
public void setPadding(int left, int top, int right, int bottom) {
-
super.setPadding(left, top, right, bottom);
-
updateDimensions();
-
invalidate();
-
}
-
-
@Override
-
public void setPaddingRelative(int start, int top, int end, int bottom) {
-
super.setPaddingRelative(start, top, end, bottom);
-
updateDimensions();
-
invalidate();
-
}
-
-
public int getBorderColor() {
-
return mBorderColor;
-
}
-
-
public void setBorderColor(@ColorInt int borderColor) {
-
if (borderColor == mBorderColor) {
-
return;
-
}
-
-
mBorderColor = borderColor;
-
mBorderPaint.setColor(borderColor);
-
invalidate();
-
}
-
-
public int getCircleBackgroundColor() {
-
return mCircleBackgroundColor;
-
}
-
-
public void setCircleBackgroundColor(@ColorInt int circleBackgroundColor) {
-
if (circleBackgroundColor == mCircleBackgroundColor) {
-
return;
-
}
-
-
mCircleBackgroundColor = circleBackgroundColor;
-
mCircleBackgroundPaint.setColor(circleBackgroundColor);
-
invalidate();
-
}
-
-
/**
-
* @deprecated Use {@link #setCircleBackgroundColor(int)} instead
-
*/
-
@Deprecated
-
public void setCircleBackgroundColorResource(@ColorRes int circleBackgroundRes) {
-
setCircleBackgroundColor(getContext().getResources().getColor(circleBackgroundRes));
-
}
-
-
public int getBorderWidth() {
-
return mBorderWidth;
-
}
-
-
public void setBorderWidth(int borderWidth) {
-
if (borderWidth == mBorderWidth) {
-
return;
-
}
-
-
mBorderWidth = borderWidth;
-
mBorderPaint.setStrokeWidth(borderWidth);
-
updateDimensions();
-
invalidate();
-
}
-
-
public boolean isBorderOverlay() {
-
return mBorderOverlay;
-
}
-
-
public void setBorderOverlay(boolean borderOverlay) {
-
if (borderOverlay == mBorderOverlay) {
-
return;
-
}
-
-
mBorderOverlay = borderOverlay;
-
updateDimensions();
-
invalidate();
-
}
-
-
public boolean isDisableCircularTransformation() {
-
return mDisableCircularTransformation;
-
}
-
-
public void setDisableCircularTransformation(boolean disableCircularTransformation) {
-
if (disableCircularTransformation == mDisableCircularTransformation) {
-
return;
-
}
-
-
mDisableCircularTransformation = disableCircularTransformation;
-
-
if (disableCircularTransformation) {
-
mBitmap =
null;
-
mBitmapCanvas =
null;
-
mBitmapPaint.setShader(
null);
-
}
else {
-
initializeBitmap();
-
}
-
-
invalidate();
-
}
-
-
@Override
-
public void setImageBitmap(Bitmap bm) {
-
super.setImageBitmap(bm);
-
initializeBitmap();
-
invalidate();
-
}
-
-
@Override
-
public void setImageDrawable(Drawable drawable) {
-
super.setImageDrawable(drawable);
-
initializeBitmap();
-
invalidate();
-
}
-
-
@Override
-
public void setImageResource(@DrawableRes int resId) {
-
super.setImageResource(resId);
-
initializeBitmap();
-
invalidate();
-
}
-
-
@Override
-
public void setImageURI(Uri uri) {
-
super.setImageURI(uri);
-
initializeBitmap();
-
invalidate();
-
}
-
-
@Override
-
public void setImageAlpha(int alpha) {
-
alpha &=
0xFF;
-
-
if (alpha == mImageAlpha) {
-
return;
-
}
-
-
mImageAlpha = alpha;
-
-
// This might be called during ImageView construction before
-
// member initialization has finished on API level >= 16.
-
if (mInitialized) {
-
mBitmapPaint.setAlpha(alpha);
-
invalidate();
-
}
-
}
-
-
@Override
-
public int getImageAlpha() {
-
return mImageAlpha;
-
}
-
-
@Override
-
public void setColorFilter(ColorFilter cf) {
-
if (cf == mColorFilter) {
-
return;
-
}
-
-
mColorFilter = cf;
-
-
// This might be called during ImageView construction before
-
// member initialization has finished on API level <= 19.
-
if (mInitialized) {
-
mBitmapPaint.setColorFilter(cf);
-
invalidate();
-
}
-
}
-
-
@Override
-
public ColorFilter getColorFilter() {
-
return mColorFilter;
-
}
-
-
private Bitmap getBitmapFromDrawable(Drawable drawable) {
-
if (drawable ==
null) {
-
return
null;
-
}
-
-
if (drawable
instanceof BitmapDrawable) {
-
return ((BitmapDrawable) drawable).getBitmap();
-
}
-
-
try {
-
Bitmap bitmap;
-
-
if (drawable
instanceof ColorDrawable) {
-
bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
-
}
else {
-
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
-
}
-
-
Canvas canvas =
new Canvas(bitmap);
-
drawable.setBounds(
0,
0, canvas.getWidth(), canvas.getHeight());
-
drawable.draw(canvas);
-
return bitmap;
-
}
catch (Exception e) {
-
e.printStackTrace();
-
return
null;
-
}
-
}
-
-
private void initializeBitmap() {
-
mBitmap = getBitmapFromDrawable(getDrawable());
-
-
if (mBitmap !=
null && mBitmap.isMutable()) {
-
mBitmapCanvas =
new Canvas(mBitmap);
-
}
else {
-
mBitmapCanvas =
null;
-
}
-
-
if (!mInitialized) {
-
return;
-
}
-
-
if (mBitmap !=
null) {
-
updateShaderMatrix();
-
}
else {
-
mBitmapPaint.setShader(
null);
-
}
-
}
-
-
private void updateDimensions() {
-
mBorderRect.set(calculateBounds());
-
mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) /
2.0f, (mBorderRect.width() - mBorderWidth) /
2.0f);
-
-
mDrawableRect.set(mBorderRect);
-
if (!mBorderOverlay && mBorderWidth >
0) {
-
mDrawableRect.inset(mBorderWidth -
1.0f, mBorderWidth -
1.0f);
-
}
-
mDrawableRadius = Math.min(mDrawableRect.height() /
2.0f, mDrawableRect.width() /
2.0f);
-
-
updateShaderMatrix();
-
}
-
-
private RectF calculateBounds() {
-
int availableWidth = getWidth() - getPaddingLeft() - getPaddingRight();
-
int availableHeight = getHeight() - getPaddingTop() - getPaddingBottom();
-
-
int sideLength = Math.min(availableWidth, availableHeight);
-
-
float left = getPaddingLeft() + (availableWidth - sideLength) /
2f;
-
float top = getPaddingTop() + (availableHeight - sideLength) /
2f;
-
-
return
new RectF(left, top, left + sideLength, top + sideLength);
-
}
-
-
private void updateShaderMatrix() {
-
if (mBitmap ==
null) {
-
return;
-
}
-
-
float scale;
-
float dx =
0;
-
float dy =
0;
-
-
mShaderMatrix.set(
null);
-
-
int bitmapHeight = mBitmap.getHeight();
-
int bitmapWidth = mBitmap.getWidth();
-
-
if (bitmapWidth * mDrawableRect.height() > mDrawableRect.width() * bitmapHeight) {
-
scale = mDrawableRect.height() / (
float) bitmapHeight;
-
dx = (mDrawableRect.width() - bitmapWidth * scale) *
0.5f;
-
}
else {
-
scale = mDrawableRect.width() / (
float) bitmapWidth;
-
dy = (mDrawableRect.height() - bitmapHeight * scale) *
0.5f;
-
}
-
-
mShaderMatrix.setScale(scale, scale);
-
mShaderMatrix.postTranslate((
int) (dx +
0.5f) + mDrawableRect.left, (
int) (dy +
0.5f) + mDrawableRect.top);
-
-
mRebuildShader =
true;
-
}
-
-
@SuppressLint(
"ClickableViewAccessibility")
-
@Override
-
public boolean onTouchEvent(MotionEvent event) {
-
if (mDisableCircularTransformation) {
-
return
super.onTouchEvent(event);
-
}
-
-
return inTouchableArea(event.getX(), event.getY()) &&
super.onTouchEvent(event);
-
}
-
-
private boolean inTouchableArea(float x, float y) {
-
if (mBorderRect.isEmpty()) {
-
return
true;
-
}
-
-
return Math.pow(x - mBorderRect.centerX(),
2) + Math.pow(y - mBorderRect.centerY(),
2) <= Math.pow(mBorderRadius,
2);
-
}
-
-
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
-
private
class OutlineProvider extends ViewOutlineProvider {
-
-
@Override
-
public void getOutline(View view, Outline outline) {
-
if (mDisableCircularTransformation) {
-
ViewOutlineProvider.BACKGROUND.getOutline(view, outline);
-
}
else {
-
Rect bounds =
new Rect();
-
mBorderRect.roundOut(bounds);
-
outline.setRoundRect(bounds, bounds.width() /
2.0f);
-
}
-
}
-
-
}
-
-
}
源码地址:github 源码
转载：https://blog.csdn.net/u012885461/article/details/105165122
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