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Android实现圆形图片效果

浏览:30日期:2022-09-17 17:25:23

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

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

Android实现圆形图片效果

Android实现圆形图片效果

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 @Override protected void onDraw(Canvas canvas) {Drawable drawable = getDrawable();if (null != drawable) { Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap(); Bitmap b = getCircleBitmap(bitmap, 14); final Rect rectSrc = 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

<com.example.jh_android.RoundPicture android: android:layout_height='200dp' android:layout_width='200dp' android:layout_marginTop='150dp' android:layout_centerHorizontal='true' android:src='https://www.haobala.com/bcjs/@drawable/head' />

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好吧啦网。

标签: Android
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