androidimageview圆角
‘壹’ android中如何将图片变为圆角
方法一：使用框架CircleImageView，这是直接使用圆形/圆角的ImageView
方法二：使用图片加载框架Glide，这是使用正常的ImageView，在加载图片的时候进行圆形/圆角处理。
java">GlideApp.with(this).load("http://123.jpg").circleCrop().into(imageView)
GlideApp.with(this).load("http://123.jpg").transform(newGlideRoundTransform(context,10)).into(imageView)
‘贰’ Android如何画圆角矩形
建立 rect_gray.xml文件放在drawable文件夹下面。
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<!-- 填充颜色 -->
<solid android:color="#FFFFFF"></solid>
<!-- 线的宽度，颜色灰色 -->
<stroke android:width="1dp" android:color="#D5D5D5"></stroke>
<!-- 矩形的圆角半径 -->
<corners android:radius="0dp" />
</shape>
然后在布局的xml里面：
作为ImageView或者Linearlayout等作为背景源就可以了。
<LinearLayout
android:id="@+id/activity_myhezu_wantchuzu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/myhezu_dottedline_rect_green"
android:orientation="horizontal" >
‘叁’ imageview的圆角怎么设置
android设置imageview圆角主要使用的是shape.xml文件，对四个角的角度进行设置，只要再imageview的background的属性上加上shape文件即可达到效果，示例如下：
shapeyuanjiao3.xml：
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<!-- 填充的颜色 -->
<solid android:color="#0000FF" />
<!-- 设置按钮的四个角为弧形 -->
<!-- android:radius 弧形的半径 -->
<corners android:topLeftRadius="@dimen/RoundedAmplitude" android:topRightRadius="@dimen/RoundedAmplitude"/>
<gradient
android:angle="270"
android:centerColor="#0000FF"
android:endColor="#0000FF"
android:startColor="#0000FF" />
</shape>
imageview、textview等的android:background="@drawable/shapeyuanjiao3"属性，设置尺寸、圆角（可以定制单独显示哪个角需要圆角）。可以参考我的csdn博客的这篇文章：http://blog.csdn.net/nihaoqiulinhe/article/details/46833819
‘肆’ 圆角关于圆角imageview，下面这种效果怎么实现
android 自定义圆角ImageView以及锯齿的处理
看到很多人开发过程中要使用圆角图片时，解决方法有：
1.重新绘制一张图片
2.通过布局来配置
3.通过重写View来实现
其中1，2在这里就不讲了，重点讲讲方法三的实现。
实现一：通过截取画布一个圆形区域与图片的相交部分进行绘制，缺点：锯齿明显，设置Paint,Canvas抗锯齿无效。
package com.open.circleimageview.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.Region;
import android.util.AttributeSet;
import android.view.View;
public class CircleImageViewA extends View {
public CircleImageViewA(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public CircleImageViewA(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CircleImageViewA(Context context) {
super(context);
}
private Bitmap bitmap;
private Rect bitmapRect=new Rect();
private PaintFlagsDrawFilter pdf=new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);
private Paint paint = new Paint();
{
paint.setStyle(Paint.Style.STROKE);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
paint.setAntiAlias(true);// 设置画笔的锯齿效果。 true是去除，大家一看效果就明白了
}
private Path mPath=new Path();
public void setImageBitmap(Bitmap bitmap)
{
this.bitmap=bitmap;
}
@Override
protected void onDraw(Canvas canvas) {
if(null==bitmap)
{
return;
}
bitmapRect.set(0, 0, getWidth(), getHeight());
canvas.save();
canvas.setDrawFilter(pdf);
mPath.reset();
canvas.clipPath(mPath); // makes the clip empty
mPath.addCircle(getWidth()/2, getWidth()/2, getHeight()/2, Path.Direction.CCW);
canvas.clipPath(mPath, Region.Op.REPLACE);
canvas.drawBitmap(bitmap, null, bitmapRect, paint);
canvas.restore();
}
}
实现二：通过PorterDuffXfermode 方式（注意要设置硬件加速，否则部分机子无效），优点：锯齿基本没有
package com.open.circleimageview.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
public class CircleImageViewB extends View {
public CircleImageViewB(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public CircleImageViewB(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public CircleImageViewB(Context context) {
super(context);
init();
}
private Bitmap bitmap;
private Rect bitmapRect=new Rect();
private PaintFlagsDrawFilter pdf=new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);
private Paint paint = new Paint();
{
paint.setStyle(Paint.Style.STROKE);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
paint.setAntiAlias(true);// 设置画笔的锯齿效果。 true是去除，大家一看效果就明白了
}
private Bitmap mDstB=null;
private PorterDuffXfermode xfermode=new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY);
private void init()
{
try {
if(android.os.Build.VERSION.SDK_INT>=11)
{
setLayerType(LAYER_TYPE_SOFTWARE, null);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void setImageBitmap(Bitmap bitmap)
{
this.bitmap=bitmap;
}
private Bitmap makeDst(int w, int h)
{
Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bm);
Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
p.setColor(Color.parseColor("#ffffffff"));
c.drawOval(new RectF(0, 0, w, h), p);
return bm;
}
@Override
protected void onDraw(Canvas canvas) {
if(null==bitmap)
{
return;
}
if(null==mDstB)
{
mDstB=makeDst(getWidth(), getHeight());
}
bitmapRect.set(0, 0, getWidth(), getHeight());
canvas.save();
canvas.setDrawFilter(pdf);
canvas.drawBitmap(mDstB, 0, 0, paint);
paint.setXfermode(xfermode);
canvas.drawBitmap(bitmap, null, bitmapRect, paint);
paint.setXfermode(null);
canvas.restore();
}
}
‘伍’ android 如何重写imageview 让图片有圆角效果
android 自定义圆角ImageView以及锯齿的处理
看到很多人开发过程中要使用圆角图片时，解决方法有：
1.重新绘制一张图片
2.通过布局来配置
3.通过重写View来实现
其中1，2在这里就不讲了，重点讲讲方法三的实现。
实现一：通过截取画布一个圆形区域与图片的相交部分进行绘制，缺点：锯齿明显，设置Paint,Canvas抗锯齿无效。
package com.open.circleimageview.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.Region;
import android.util.AttributeSet;
import android.view.View;
public class CircleImageViewA extends View {
public CircleImageViewA(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public CircleImageViewA(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CircleImageViewA(Context context) {
super(context);
}
private Bitmap bitmap;
private Rect bitmapRect=new Rect();
private PaintFlagsDrawFilter pdf=new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);
private Paint paint = new Paint();
{
paint.setStyle(Paint.Style.STROKE);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
paint.setAntiAlias(true);// 设置画笔的锯齿效果。 true是去除，大家一看效果就明白了
}
private Path mPath=new Path();
public void setImageBitmap(Bitmap bitmap)
{
this.bitmap=bitmap;
}
@Override
protected void onDraw(Canvas canvas) {
if(null==bitmap)
{
return;
}
bitmapRect.set(0, 0, getWidth(), getHeight());
canvas.save();
canvas.setDrawFilter(pdf);
mPath.reset();
canvas.clipPath(mPath); // makes the clip empty
mPath.addCircle(getWidth()/2, getWidth()/2, getHeight()/2, Path.Direction.CCW);
canvas.clipPath(mPath, Region.Op.REPLACE);
canvas.drawBitmap(bitmap, null, bitmapRect, paint);
canvas.restore();
}
}
实现二：通过PorterDuffXfermode 方式（注意要设置硬件加速，否则部分机子无效），优点：锯齿基本没有
package com.open.circleimageview.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
public class CircleImageViewB extends View {
public CircleImageViewB(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public CircleImageViewB(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public CircleImageViewB(Context context) {
super(context);
init();
}
private Bitmap bitmap;
private Rect bitmapRect=new Rect();
private PaintFlagsDrawFilter pdf=new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);
private Paint paint = new Paint();
{
paint.setStyle(Paint.Style.STROKE);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
paint.setAntiAlias(true);// 设置画笔的锯齿效果。 true是去除，大家一看效果就明白了
}
private Bitmap mDstB=null;
private PorterDuffXfermode xfermode=new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY);
private void init()
{
try {
if(android.os.Build.VERSION.SDK_INT>=11)
{
setLayerType(LAYER_TYPE_SOFTWARE, null);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void setImageBitmap(Bitmap bitmap)
{
this.bitmap=bitmap;
}
private Bitmap makeDst(int w, int h)
{
Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bm);
Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
p.setColor(Color.parseColor("#ffffffff"));
c.drawOval(new RectF(0, 0, w, h), p);
return bm;
}
@Override
protected void onDraw(Canvas canvas) {
if(null==bitmap)
{
return;
}
if(null==mDstB)
{
mDstB=makeDst(getWidth(), getHeight());
}
bitmapRect.set(0, 0, getWidth(), getHeight());
canvas.save();
canvas.setDrawFilter(pdf);
canvas.drawBitmap(mDstB, 0, 0, paint);
paint.setXfermode(xfermode);
canvas.drawBitmap(bitmap, null, bitmapRect, paint);
paint.setXfermode(null);
canvas.restore();
}
}
‘陆’ 如何给imageview设置圆角
android设置imageview圆角主要使用的是shape.xml文件，对四个角的角度进行设置，只要再imageview的background的属性上加上shape文件即可达到效果，示例如下：
shapeyuanjiao3.xml：
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<!-- 填充的颜色 -->
<solid android:color="#0000FF" />
<!-- 设置按钮的四个角为弧形 -->
<!-- android:radius 弧形的半径 -->
<corners android:topLeftRadius="@dimen/RoundedAmplitude" android:topRightRadius="@dimen/RoundedAmplitude"/>
<gradient
android:angle="270"
android:centerColor="#0000FF"
android:endColor="#0000FF"
android:startColor="#0000FF" />
</shape>
imageview、textview等的android:background="@drawable/shapeyuanjiao3"属性，设置尺寸、圆角（可以定制单独显示哪个角需要圆角）。可以参考我的csdn博客的这篇文章：http://blog.csdn.net/nihaoqiulinhe/article/details/46833819
‘柒’ 安卓imageview控件怎么设置成圆形
首先，定义定义圆形Imageview类：
importandroid.content.Context;
importandroid.graphics.Bitmap;
importandroid.graphics.Bitmap.Config;
importandroid.graphics.Canvas;
importandroid.graphics.Color;
importandroid.graphics.Paint;
importandroid.graphics.PorterDuff.Mode;
importandroid.graphics.PorterDuffXfermode;
importandroid.graphics.Rect;
importandroid.graphics.drawable.BitmapDrawable;
importandroid.graphics.drawable.Drawable;
importandroid.util.AttributeSet;
importandroid.widget.ImageView;
{
publicRoundImageView(Contextcontext){
super(context);
//TODOAuto-generatedconstructorstub
}
publicRoundImageView(Contextcontext,AttributeSetattrs){
super(context,attrs);
}
publicRoundImageView(Contextcontext,AttributeSetattrs,intdefStyle){
super(context,attrs,defStyle);
}
@Override
protectedvoidonDraw(Canvascanvas){
Drawabledrawable=getDrawable();
if(drawable==null){
return;
}
if(getWidth()==0||getHeight()==0){
return;
}
Bitmapb=((BitmapDrawable)drawable).getBitmap();
if(null==b)
{
return;
}
Bitmapbitmap=b.(Bitmap.Config.ARGB_8888,true);
intw=getWidth(),h=getHeight();
BitmaproundBitmap=getCroppedBitmap(bitmap,w);
canvas.drawBitmap(roundBitmap,0,0,null);
}
(Bitmapbmp,intradius){
Bitmapsbmp;
if(bmp.getWidth()!=radius||bmp.getHeight()!=radius)
sbmp=Bitmap.createScaledBitmap(bmp,radius,radius,false);
else
sbmp=bmp;
Bitmapoutput=Bitmap.createBitmap(sbmp.getWidth(),
sbmp.getHeight(),Config.ARGB_8888);
Canvascanvas=newCanvas(output);
finalintcolor=0xffa19774;
finalPaintpaint=newPaint();
finalRectrect=newRect(0,0,sbmp.getWidth(),sbmp.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0,0,0,0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(sbmp.getWidth()/2+0.7f,sbmp.getHeight()/2+0.7f,
sbmp.getWidth()/2+0.1f,paint);
paint.setXfermode(newPorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp,rect,rect,paint);
returnoutput;
}
}
然后在别的布局文件中使用该控件即可，如：
<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/side_right"
android:gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="35dip"
android:orientation="vertical">
<<spanstyle="color:#ff0000;">com.founder.reader.view.RoundImageView</span>
android:id="@+id/right_login_head"
android:layout_width="60dip"
android:layout_height="60dip"
android:scaleType="centerInside"
android:src="@drawable/user"/>
‘捌’ androidstudio的imageview组件能搞成圆形吗
可以通过代码来修改
/**
* 将图片截取为圆角图片
*
* @param bitmap 原图片
* @param ratio 截取比例，如果是8，则圆角半径是宽高的1/8，如果是2，则是圆形图片
* @return 圆角矩形图片
*/
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float ratio) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawRoundRect(rectF, bitmap.getWidth() / ratio,
bitmap.getHeight() / ratio, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
‘玖’ android怎么把imageview边角弄成圆角
请网络一下shape,就可以给图片/布局设置成圆角.当然是做成圆形的框,需要在代码中进行设置.
‘拾’ Android如何设置圆角图片
可以使用自定义控件显示圆角效果，或者使用style
设置shape，最直接的就是直接使用圆角图片，参考资料:http://www.it399.com/imageRound，望采纳，谢谢。