package com.example.datalibrary.view;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.PorterDuff;
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import android.graphics.PorterDuffXfermode;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.util.AttributeSet;
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import android.widget.ImageView;
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/**
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* author : baidu
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* date : 2020-02-27 11:41
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* description :
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*/
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public class XCRoundRectImageView extends ImageView {
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private Paint paint;
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public XCRoundRectImageView(Context context) {
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this(context, null);
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}
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public XCRoundRectImageView(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public XCRoundRectImageView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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paint = new Paint();
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}
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/**
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* 绘制圆角矩形图片
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*
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* @author caizhiming
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*/
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@Override
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protected void onDraw(Canvas canvas) {
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Drawable drawable = getDrawable();
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if (null != drawable) {
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Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
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Bitmap b = getRoundBitmap(bitmap, 30);
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final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
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final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());
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paint.reset();
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canvas.drawBitmap(b, rectSrc, rectDest, paint);
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} else {
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super.onDraw(canvas);
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}
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}
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/**
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* 获取圆角矩形图片方法
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*
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* @param bitmap
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* @param roundPx,一般设置成14
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* @return Bitmap
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* @author caizhiming
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*/
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private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {
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Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
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bitmap.getHeight(), Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(output);
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final int color = 0xff424242;
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final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
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final RectF rectF = new RectF(rect);
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paint.setAntiAlias(true);
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canvas.drawARGB(0, 0, 0, 0);
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paint.setColor(color);
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int x = bitmap.getWidth();
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canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
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paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
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canvas.drawBitmap(bitmap, rect, rect, paint);
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return output;
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}
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}
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