glide加描边

最新推荐文章于 2023-11-17 23:02:18 发布

jwangzzzz

最新推荐文章于 2023-11-17 23:02:18 发布

阅读量2.2k

点赞数

分类专栏： Android项目记录文章标签： android

本文链接：https://blog.youkuaiyun.com/qq_36310162/article/details/121970536

版权

Android项目记录专栏收录该内容

43 篇文章

订阅专栏

本文介绍了一个自定义的Glide BitmapTransformation实现，GlideCircleBorderTransform，用于为图片添加圆角边框效果。通过设置边框宽度和颜色，提升图片展示的视觉吸引力。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.youjing.yingyudiandu.utils;

import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;
import androidx.annotation.NonNull;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

import java.security.MessageDigest;


/**
 * Glide 的图形变换可参考Glide 示例源码
 * {@link com.bumptech.glide.load.resource.bitmap.CenterCrop}
 * {@link BitmapTransformation}
 *
 */

public class GlideCircleBorderTransform extends BitmapTransformation {
    private final String ID = getClass().getName();
    private Paint mBorderPaint;
    private float borderWidth;
    private int borderColor;


    public GlideCircleBorderTransform(float borderWidth, int borderColor) {
        this.borderWidth = borderWidth;
        this.borderColor = borderColor;
        mBorderPaint = new Paint();
        mBorderPaint.setColor(borderColor);
        mBorderPaint.setStyle(Paint.Style.STROKE);
        mBorderPaint.setAntiAlias(true);
        mBorderPaint.setStrokeWidth(borderWidth);
        mBorderPaint.setDither(true);

    }

    @Override
    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
        return circleCrop(pool, toTransform);
    }


    private Bitmap circleCrop(BitmapPool bitmapPool, Bitmap source) {

        int size = Math.min(source.getWidth(), source.getHeight());
        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;
        Bitmap square = Bitmap.createBitmap(source, x, y, size, size);
        Bitmap result = bitmapPool.get(size, size, Bitmap.Config.ARGB_8888);
        if (result == null) {
            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        }

        //画图
        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        //设置 Shader
        paint.setShader(new BitmapShader(square, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        paint.setAntiAlias(true);
        float radius = size / 2f;
        //绘制一个圆
        canvas.drawCircle(radius, radius, radius, paint);


        /************************描边*********************/
        //注意：避免出现描边被屏幕边缘裁掉
        float borderRadius = radius - (borderWidth / 2);
        //画边框
        canvas.drawCircle(radius, radius, borderRadius, mBorderPaint);
        return result;
    }

    @Override
    public void updateDiskCacheKey(MessageDigest messageDigest) {
        messageDigest.update(ID.getBytes(CHARSET));
    }

    @Override
    public boolean equals(Object o) {
        return o instanceof GlideCircleBorderTransform;
    }

    @Override
    public int hashCode() {
        return ID.hashCode();
    }


}

RequestOptions options = RequestOptions
                .bitmapTransform(new GlideCircleBorderTransform(DisplayUtil.dip2px(mContext, 0.5f), mContext.getResources().getColor(R.color.bg_E5E5E5)))//描边
                .diskCacheStrategy(DiskCacheStrategy.NONE)//不做磁盘缓存
                .skipMemoryCache(true);//不做内存缓存;