Glide圆形图片工具类

 谷歌开发者论坛上，谷歌为我们介绍了一个名叫 Glide 的图片加载库，作者是bumptech。这个库被广泛的运用在google的开源项目中，包括2014年google I/O大会上发布的官方app。 我们直接实战（不扯淡）： 1、引入库：

compile 'com.github.bumptech.glide:glide:3.6.1'
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 2、演示代码：

public class MainActivity extends AppCompatActivity {    String url = "http://img0.bdstatic.com/img/image/shouye/xiaoxiao/%E5%B0%8F%E6%B8%85%E6%96%B0614.jpg";    ImageView mImgNormal, mImgCircle, mImgRound;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mImgNormal = (ImageView) findViewById(R.id.img_normal);        mImgCircle = (ImageView) findViewById(R.id.img_circle);        mImgRound = (ImageView) findViewById(R.id.img_round);        GlideImgManager.glideLoader(this, url, R.mipmap.ic_launcher, R.mipmap.ic_launcher, mImgNormal);        GlideImgManager.glideLoader(this, url, R.mipmap.ic_launcher, R.mipmap.ic_launcher, mImgCircle, 0);        GlideImgManager.glideLoader(this, url, R.mipmap.ic_launcher, R.mipmap.ic_launcher, mImgRound, 1);    }
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 3、CircleImage工具类:

/*** Created by qly on 2016/6/22.* 将图片转化为圆形*/public class GlideCircleTransform extends BitmapTransformation {    public GlideCircleTransform(Context context) {        super(context);    }    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {        return circleCrop(pool, toTransform);    }    private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {        if (source == null) return null;        int size = Math.min(source.getWidth(), source.getHeight());        int x = (source.getWidth() - size) / 2;        int y = (source.getHeight() - size) / 2;        // TODO this could be acquired from the pool too        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);        if (result == null) {            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);        }        Canvas canvas = new Canvas(result);        Paint paint = new Paint();        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));        paint.setAntiAlias(true);        float r = size / 2f;        canvas.drawCircle(r, r, r, paint);        return result;    }    @Override public String getId() {        return getClass().getName();    }}

 4、RoundImage工具类：

/***  Created by qly on 2016/6/22.*  将图片转化为圆角*  构造中第二个参数定义半径*/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);    }}

 5、操作工具类：

/*** Created by QLY on 2016/6/22.*/public class GlideImgManager {    /**    * load normal  for img    *    * @param url    * @param erroImg    * @param emptyImg    * @param iv    */    public static void glideLoader(Context context,String url, int erroImg, int emptyImg, ImageView iv) {        //原生 API        Glide.with(context).load(url).placeholder(emptyImg).error(erroImg).into(iv);    }    /**    * load normal  for  circle or round img    *    * @param url    * @param erroImg    * @param emptyImg    * @param iv    * @param tag    */    public static void glideLoader(Context context, String url, int erroImg, int emptyImg, ImageView iv, int tag) {        if (0 == tag) {            Glide.with(context).load(url).placeholder(emptyImg).error(erroImg).transform(new GlideCircleTransform(context)).into(iv);        } else if (1 == tag) {            Glide.with(context).load(url).placeholder(emptyImg).error(erroImg).transform(new GlideRoundTransform(context,10)).into(iv);        }    }}

 Glide教程：http://mrfu.me/2016/02/27/Glide_Getting_Started/ 打完收工，不谢 -_-

尼玛，差点忘贴图：

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