Corners ImageView fit inside CardView没有像CardView那样的半径';Android中的s角
我正在开发一个Android应用程序。在我的应用程序中,我同时使用了Corners ImageView fit inside CardView没有像CardView那样的半径';Android中的s角,android,android-imageview,android-cardview,Android,Android Imageview,Android Cardview,我正在开发一个Android应用程序。在我的应用程序中,我同时使用了cardwiew和ImageView。但是我在设计ImageView内部cardwiew时遇到了一个问题。问题在于ImageView的角半径 我有如下适配器项的XML布局 <?xml version="1.0" encoding="utf-8"?> <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/ap
cardwiew
和ImageView
。但是我在设计ImageView
内部cardwiew
时遇到了一个问题。问题在于ImageView
的角半径
我有如下适配器项的XML布局
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
card_view:cardCornerRadius="5dp"
android:layout_width="match_parent"
android:id="@+id/di_card_container"
android:layout_height="wrap_content">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/di_iv_image"
android:scaleType="centerCrop"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<RelativeLayout
android:padding="10dp"
android:layout_below="@id/di_iv_image"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:id="@+id/di_name_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:textSize="15dp"
android:textColor="@color/textColorPrimary"
android:id="@+id/di_tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
通常情况下,cardwiew
的子视图的角会自动弯曲,就像其父视图的角一样,如果它适合父视图cardwiew
。是这样吗?那么为什么我的ImageView
不起作用呢?所以这是棒棒糖前的常见行为。以下是修复此问题的步骤:
步骤1:将以下属性添加到cardView
card_view:cardUseCompatPadding="true"
card_view:cardPreventCornerOverlap="false"
card_view:cardCornerRadius="10dp"
步骤2:使用一个自定义的ImageView,使其顶部边框环绕:
public class RoundedTopImageView extends ImageView {
private Paint mPaint;
private Path mPath;
private Bitmap mBitmap;
private Matrix mMatrix;
private int mRadius = DisplayUtils.convertDpToPixel(10);
private int mWidth;
private int mHeight;
private Drawable mDrawable;
public RoundedTopImageView(Context context) {
super(context);
init();
}
public RoundedTopImageView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public RoundedTopImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
mPaint = new Paint();
mPaint.setColor(Color.WHITE);
mPath = new Path();
}
@Override
public void setImageDrawable(Drawable drawable) {
mDrawable = drawable;
if (drawable == null) {
return;
}
mBitmap = drawableToBitmap(drawable);
int bDIWidth = mBitmap.getWidth();
int bDIHeight = mBitmap.getHeight();
//Fit to screen.
float scale;
if ((mHeight / (float)bDIHeight) >= (mWidth / (float)bDIWidth)){
scale = mHeight / (float)bDIHeight;
} else {
scale = mWidth / (float)bDIWidth;
}
float borderLeft = (mWidth - (bDIWidth * scale)) / 2;
float borderTop = (mHeight - (bDIHeight * scale)) / 2;
mMatrix = getImageMatrix();
RectF drawableRect = new RectF(0, 0, bDIWidth, bDIHeight);
RectF viewRect = new RectF(borderLeft, borderTop, (bDIWidth * scale) + borderLeft, (bDIHeight * scale) + borderTop);
mMatrix.setRectToRect(drawableRect, viewRect, Matrix.ScaleToFit.CENTER);
invalidate();
}
private Bitmap drawableToBitmap(Drawable drawable) {
Bitmap bitmap;
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mWidth = MeasureSpec.getSize(widthMeasureSpec);
mHeight = MeasureSpec.getSize(heightMeasureSpec);
if ((mDrawable != null) && (mHeight > 0) && (mWidth > 0)) {
setImageDrawable(mDrawable);
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mBitmap == null) {
return;
}
canvas.drawColor(Color.TRANSPARENT);
mPath.reset();
mPath.moveTo(0, mRadius);
mPath.lineTo(0, canvas.getHeight());
mPath.lineTo(canvas.getWidth(), canvas.getHeight());
mPath.lineTo(canvas.getWidth(), mRadius);
mPath.quadTo(canvas.getWidth(), 0, canvas.getWidth() - mRadius, 0);
mPath.lineTo(mRadius, 0);
mPath.quadTo(0, 0, 0, mRadius);
canvas.drawPath(mPath, mPaint);
canvas.clipPath(mPath);
canvas.drawBitmap(mBitmap, mMatrix, mPaint);
}
}
编辑:添加了convertDpToPixel
功能
抱歉,我忘了添加这个,它是一个Util类的一部分,您可以在任何地方添加它(在我的例子中是DisplayUtils
class):
步骤1:在应用程序级别build.gradle中添加依赖项
compile 'com.makeramen:roundedimageview:2.2.1'
步骤2:在CardView xml代码中:
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/di_card_container"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
app:cardCornerRadius="5dp"
app:cardElevation="4dp">
ImageView中的步骤3:
<com.makeramen.roundedimageview.RoundedImageView
android:id="@+id/di_iv_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:layout_alignParentTop="true"
app:riv_corner_radius_top_left="5dp"
app:riv_corner_radius_top_right="5dp"/>
我希望它能对像我这样偶然发现这个问题的人有所帮助。
如果您使用的是毕加索,则可以使用以下内容(在Kotlin中)(&U):
我试着检查radius是px还是dp,但找不到任何资源。但是,从我的测试来看,应该是dp。也似乎表明它是dp,因为从dp到px没有转换
必须按顺序执行函数fit()
,centerCrop()
和transform()
如果您正在使用Glide,中也存在类似的解决方案。在棒棒糖前设备上测试时是否存在此问题?是的。我正在android 4.3上测试它,无法找到DisplayUtils.convertDpToPixel(10)的DisplayUtils类。那么,我该如何获得它呢?它可以很好地去除填充空间,但顶角没有用lint错误进行圆角,而是声明extend-AppCompatImageView
rounded-top and-bottom该依赖项只是以有线方式裁剪照片,使其看起来像垃圾
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/di_card_container"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
app:cardCornerRadius="5dp"
app:cardElevation="4dp">
<com.makeramen.roundedimageview.RoundedImageView
android:id="@+id/di_iv_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:layout_alignParentTop="true"
app:riv_corner_radius_top_left="5dp"
app:riv_corner_radius_top_right="5dp"/>
val radius = 5
Picasso.get()
.load(image)
.fit() // to centerCrop, you have to do either resize() or fit()
.centerCrop() // to remove any possible white areas
.transform(RoundedCornersTransformation(radius, 0,
RoundedCornersTransformation.CornerType.TOP))
.into(imageView)