Android实现圆角图片
程序员文章站
2022-06-27 19:00:09
本文实例为大家分享了android实现圆角图片的具体代码，供大家参考，具体内容如下效果图：快速开始activity_main.xml文件：
本文实例为大家分享了android实现圆角图片的具体代码，供大家参考，具体内容如下
效果图：
快速开始
activity_main.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.constraintlayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".mainactivity">
<imageview
android:id="@+id/iv_img"
android:layout_width="300dp"
android:layout_height="200dp"
android:layout_margintop="30dp"
android:src="@mipmap/image_bg"
app:layout_constraintright_torightof="parent"
app:layout_constraintleft_toleftof="parent"
app:layout_constrainttop_totopof="parent"/>
<imageview
android:id="@+id/iv_rect_img"
android:layout_width="300dp"
android:layout_height="200dp"
android:layout_margintop="30dp"
app:layout_constraintright_torightof="parent"
app:layout_constraintleft_toleftof="parent"
app:layout_constrainttop_tobottomof="@id/iv_img"/>
<imageview
android:id="@+id/iv_circle_img"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_margintop="30dp"
app:layout_constraintleft_toleftof="parent"
app:layout_constraintright_torightof="parent"
app:layout_constrainttop_tobottomof="@id/iv_rect_img"/>
</android.support.constraint.constraintlayout>
mainactivity.class文件：
public class mainactivity extends appcompatactivity {
private imageview ivrectimg, ivcircleimg;
private bitmap bitmap;
private int width;
private int height;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
ivrectimg = findviewbyid(r.id.iv_rect_img);
ivcircleimg = findviewbyid(r.id.iv_circle_img);
bitmap = bitmapfactory.decoderesource(getresources(), r.mipmap.image_bg);
width = bitmap.getwidth();
height = bitmap.getheight();
rectroundbitmap();
circlebitmap();
}
// 圆角矩形
private void rectroundbitmap() {
roundedbitmapdrawable bitmapdrawable = roundedbitmapdrawablefactory.create(getresources(), bitmap);
bitmapdrawable.setantialias(true);
bitmapdrawable.setcornerradius(50);
ivrectimg.setimagedrawable(bitmapdrawable);
}
// 把bitmap图片进行剪切成正方形， 然后再设置圆角半径为正方形边长的一半即可
private void circlebitmap() {
bitmap circle = null;
int min = math.min(width, height);
int max = math.max(width, height);
if (width == height) {
circle = bitmap.createbitmap(bitmap, 0, 0, width, height);
} else {
// 居中裁剪
if (width > height) {
circle = bitmap.createbitmap(bitmap, (max - min) / 2, 0, min, min);
} else {
circle = bitmap.createbitmap(bitmap, 0, (max - min) / 2, min, min);
}
}
roundedbitmapdrawable bitmapdrawable = roundedbitmapdrawablefactory.create(getresources(), circle);
bitmapdrawable.setcornerradius(min / 2);
bitmapdrawable.setantialias(true);
ivcircleimg.setimagedrawable(bitmapdrawable);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。