Glide简单使用

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DiskCacheStrategy.NONE 什么都不缓存
DiskCacheStrategy.SOURCE 仅仅只缓存原来的全分辨率的图像
DiskCacheStrategy.RESULT 仅仅缓存最终的图像，即降低分辨率后的（或者是转换后的）
DiskCacheStrategy.ALL 缓存所有版本的图像（默认行为）

仅仅缓存原来的全分辨率的图像

Glide.with(this).load(url).diskCacheStrategy(DiskCacheStrategy.SOURCE).into(imageView);

加载圆形图片需要重写一个类

GlideRoundTransform

import android.content.Context;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.RectF;import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;/** * Created by SensYang on 2017/05/25 10:13 */public class GlideRoundTransform extends BitmapTransformation {    private static float radius = 0f;    public GlideRoundTransform(Context context) {        this(context, 4);    }    public GlideRoundTransform(Context context, int dp) {        super(context);        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;    }    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {        return roundCrop(pool, toTransform);    }    private static Bitmap roundCrop(BitmapPool pool, Bitmap source) {        if (source == null) return null;        Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);        if (result == null) {            result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);        }        Canvas canvas = new Canvas(result);        Paint paint = new Paint();        paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));        paint.setAntiAlias(true);        RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());        canvas.drawRoundRect(rectF, radius, radius, paint);        return result;    }    @Override public String getId() {        return getClass().getName() + Math.round(radius);    }}

调用方法：

Glide.with(mcontext).load(HttpConfig.MAIN_HOST + HttpConfig.URL_POSTER_01_GET).transform(new GlideRoundTransform(mcontext, 20)).into(holder.image);

需要更深入理解的请看大神：

http://blog.csdn.net/u013278099/article/details/50459128

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