Android实现圆形图片效果 Android实现圆形图片效果

本文实例为大家分享了Android实现圆形图片效果的具体代码，供大家参考，具体内容如下

文章图片

【Android实现圆形图片效果】创建RoundPicture.java文件

在src/main/java/XX包下新建RoundPicture.java

文章图片

文章图片

写入RoundPicture.java文件
复制下方代码，并引入类即可

public class RoundPicture extends androidx.appcompat.widget.AppCompatImageView {private Paint paint; public RoundPicture(Context context) {this(context, null); }public RoundPicture(Context context, AttributeSet attrs) {this(context, attrs, 0); }public RoundPicture(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle); paint = new Paint(); }//绘制圆形图片@Overrideprotected void onDraw(Canvas canvas) {Drawable drawable = getDrawable(); if (null != drawable) {Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap(); Bitmap b = getCircleBitmap(bitmap, 14); final Rect rectSrc = https://www.it610.com/article/new Rect(0, 0, b.getWidth(), b.getHeight()); final Rect rectDest = new Rect(0, 0, getWidth(), getHeight()); paint.reset(); canvas.drawBitmap(b, rectSrc, rectDest, paint); } else {super.onDraw(canvas); }}//获取圆形图片方法private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); int x = bitmap.getWidth(); canvas.drawCircle(x / 2, x / 2, x / 2, paint); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; }}

调用RoundPicture创建圆形图片
只需在.xml文件中插入图片处，将控件名改为
< XX.RoundPicture 并引入图片即可

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脚本之家。