android:background=“#7f000000”
android:paddingLeft=“8dp”
android:paddingRight=“8dp”
android:textAppearance=“?android:attr/textAppearanceMediumInverse” />
<TextView
android:id=“@+id/textView1”
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:layout_above=“@+id/textView2”
android:layout_alignLeft=“@+id/textView2”
android:layout_marginBottom=“4dp”
android:background=“#7f000000”
android:paddingLeft=“8dp”
android:paddingRight=“8dp”
android:textAppearance=“?android:attr/textAppearanceLargeInverse” />
如下图:
用代码创建 :
RoundedImageView iv = new RoundedImageView(context);
iv.setScaleType(ScaleType.CENTER_CROP);
iv.setCornerRadius(10);
iv.setBorderWidth(2);
iv.setBorderColor(Color.DKGRAY);
iv.setRoundedBackground(true);
iv.setImageDrawable(drawable);
iv.setBackground(backgroundDrawable);
iv.setOval(true);
贴上部分源码:
package com.makeramen;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.net.Uri;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ImageView;
@SuppressWarnings(“UnusedDeclaration”)
public class RoundedImageView extends ImageView {
public static final String TAG = “RoundedImageView”;
public static final float DEFAULT_RADIUS = 0f;
public static final float DEFAULT_BORDER_WIDTH = 0f;
private static final ScaleType[] SCALE_TYPES = {
ScaleType.MATRIX,
ScaleType.FIT_XY,
ScaleType.FIT_START,
ScaleType.FIT_CENTER,
ScaleType.FIT_END,
ScaleType.CENTER,
ScaleType.CENTER_CROP,
ScaleType.CENTER_INSIDE
};
private float cornerRadius = DEFAULT_RADIUS;
private float borderWidth = DEFAULT_BORDER_WIDTH;
private ColorStateList borderColor =
ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
private boolean isOval = false;
private boolean mutateBackground = false;
private int mResource;
private Drawable mDrawable;
private Drawable mBackgroundDrawable;
private ScaleType mScaleType;
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedImageView, defStyle, 0);
int index = a.getInt(R.styleable.RoundedImageView_android_scaleType, -1);
if (index >= 0) {
setScaleType(SCALE_TYPES[index]);
} else {
// default scaletype to FIT_CENTER
setScaleType(ScaleType.FIT_CENTER);
}
cornerRadius = a.getDimensionPixelSize(R.styleable.RoundedImageView_corner_radius, -1);
borderWidth = a.getDimensionPixelSize(R.styleable.RoundedImageView_border_width, -1);
// don’t allow negative values for radius and border
if (cornerRadius < 0) {
cornerRadius = DEFAULT_RADIUS;
}
if (borderWidth < 0) {
borderWidth = DEFAULT_BORDER_WIDTH;
}
borderColor = a.getColorStateList(R.styleable.RoundedImageView_border_color);
if (borderColor == null) {
borderColo
r = ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
}
mutateBackground = a.getBoolean(R.styleable.RoundedImageView_mutate_background, false);
isOval = a.getBoolean(R.styleable.RoundedImageView_oval, false);
updateDrawableAttrs();
updateBackgroundDrawableAttrs(true);
a.recycle();
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
invalidate();
}
/**
-
Return the current scale type in use by this ImageView.
-
@attr ref android.R.styleable#ImageView_scaleType
-
@see android.widget.ImageView.ScaleType
*/
@Override
public ScaleType getScaleType() {
return mScaleType;
}
/**
-
Controls how the image should be resized or moved to match the size
-
of this ImageView.
-
@param scaleType The desired scaling mode.
-
@attr ref android.R.styleable#ImageView_scaleType
*/
@Override
public void setScaleType(ScaleType scaleType) {
assert scaleType != null;
if (mScaleType != scaleType) {
mScaleType = scaleType;
switch (scaleType) {
case CENTER:
case CENTER_CROP:
case CENTER_INSIDE:
case FIT_CENTER:
case FIT_START:
case FIT_END:
case FIT_XY:
super.setScaleType(ScaleType.FIT_XY);
break;
default:
super.setScaleType(scaleType);
break;
}
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
invalidate();
}
}
@Override
public void setImageDrawable(Drawable drawable) {
mResource = 0;
mDrawable = RoundedDrawable.fromDrawable(drawable);
updateDrawableAttrs();
super.setImageDrawable(mDrawable);
}
@Override
public void setImageBitmap(Bitmap bm) {
mResource = 0;
mDrawable = RoundedDrawable.fromBitmap(bm);
updateDrawableAttrs();
super.setImageDrawable(mDrawable);
}
@Override
public void setImageResource(int resId) {
if (mResource != resId) {
mResource = resId;
mDrawable = resolveResource();
updateDrawableAttrs();
super.setImageDrawable(mDrawable);
}
}
@Override public void setImageURI(Uri uri) {
super.setImageURI(uri);
setImageDrawable(getDrawable());
}
private Drawable resolveResource() {
Resources rsrc = getResources();
if (rsrc == null) { return null; }
Drawable d = null;
if (mResource != 0) {
try {
d = rsrc.getDrawable(mResource);
} catch (Exception e) {
Log.w(TAG, "Unable to find resource: " + mResource, e);
// Don’t try again.
mResource = 0;
}
}
return RoundedDrawable.fromDrawable(d);
}
@Override
public void setBackground(Drawable background) {
setBackgroundDrawable(background);
}
private void updateDrawableAttrs() {
updateAttrs(mDrawable);
}
private void updateBackgroundDrawableAttrs(boolean convert) {
if (mutateBackground) {
if (convert) {
mBackgroundDrawable = RoundedDrawable.fromDrawable(mBackgroundDrawable);
}
updateAttrs(mBackgroundDrawable);
}
}
private void updateAttrs(Drawable drawable) {
if (drawable == null) { return; }
if (drawable instanceof RoundedDrawable) {
((RoundedDrawable) drawable)
.setScaleType(mScaleType)
.setCornerRadius(cornerRadius)
.setBorderWidth(borderWidth)
.setBorderColor(borderColor)
.setOval(isOval);
} else if (drawable instanceof LayerDrawable) {
// loop through layers to and set drawable attrs
LayerDrawable ld = ((LayerDrawable) drawable);
for (int i = 0, layers = ld.getNumberOfLayers(); i < layers; i++) {
updateAttrs(ld.getDrawable(i));
}
}
}
@Override
@Deprecated
public void setBackgroundDrawable(Drawable background) {
mBackgroundDrawable = background;
updateBackgroundDrawableAttrs(true);
super.setBackgroundDrawable(mBackgroundDrawable);
}
public float getCornerRadius() {
return cornerRadius;
}
public void setCornerRadius(int resId) {
setCornerRadius(getResources().getDimension(resId));
}
public void setCornerRadius(float radius) {
if (cornerRadius == radius) { return; }
cornerRadius = radius;
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
}
public float getBorderWidth() {
return borderWidth;
}
public void setBorderWidth(int resId) {
setBorderWidth(getResources().getDimension(resId));
}
public void setBorderWidth(float width) {
if (borderWidth == width) { return; }
borderWidth = width;
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
invalidate();
}
public int getBorderColor() {
return borderColor.getDefaultColor();
}
public void setBorderColor(int color) {
setBorderColor(ColorStateList.valueOf(color));
}
public ColorStateList getBorderColors() {
return borderColor;
}
public void setBorderColor(ColorStateList colors) {
if (borderColor.equals(colors)) { return; }
borderColor =
(colors != null) ? colors : ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
if (borderWidth > 0) {
invalidate();
}
}
public boolean isOval() {
return isOval;
}
public void setOval(boolean oval) {
isOval = oval;
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
invalidate();
}
public boolean isMutateBackground() {
return mutateBackground;
}
public void setMutateBackground(boolean mutate) {
if (mutateBackground == mutate) { return; }
mutateBackground = mutate;
updateBackgroundDrawableAttrs(true);
invalidate();
}
}
最后
小编这些年深知大多数初中级Android工程师，想要提升自己，往往是自己摸索成长，自己不成体系的自学效果低效漫长且无助。
因此我收集整理了一份《2024年Android移动开发全套学习资料》，初衷也很简单，就是希望能够帮助到想自学提升又不知道该从何学起的朋友。
[外链图片转存中…(img-Zh0QShiD-1719034103397)]
一个人可以走的很快，但一群人才能走的更远！不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人
都欢迎加入我们的的圈子（技术交流、学习资源、职场吐槽、大厂内推、面试辅导），让我们一起学习成长！
资料⬅专栏获取
ublic void setOval(boolean oval) {
isOval = oval;
updateDrawableAttrs();
updateBackgroundDrawableAttrs(false);
invalidate();
}
public boolean isMutateBackground() {
return mutateBackground;
}
public void setMutateBackground(boolean mutate) {
if (mutateBackground == mutate) { return; }
mutateBackground = mutate;
updateBackgroundDrawableAttrs(true);
invalidate();
}
}
最后
小编这些年深知大多数初中级Android工程师，想要提升自己，往往是自己摸索成长，自己不成体系的自学效果低效漫长且无助。
因此我收集整理了一份《2024年Android移动开发全套学习资料》，初衷也很简单，就是希望能够帮助到想自学提升又不知道该从何学起的朋友。
[外链图片转存中…(img-Zh0QShiD-1719034103397)]
一个人可以走的很快，但一群人才能走的更远！不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人
都欢迎加入我们的的圈子（技术交流、学习资源、职场吐槽、大厂内推、面试辅导），让我们一起学习成长！
资料⬅专栏获取
