Android中Glide加载圆形图片和圆角图片实例代码

/** *  * Glide 圆形图片 Transform */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;    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();  }}

/** * Glide 圆角 Transform */public class GlideRoundTransform extends BitmapTransformation {  private static float radius = 0f;  /** * 构造函数 默认圆角半径 4dp * * @param context Context */  public GlideRoundTransform(Context context) {    this(context, 4);  }  /** * 构造函数 * * @param context Context * @param dp 圆角半径 */  public GlideRoundTransform(Context context, int dp) {    super(context);    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);  }}

//加载圆角图片   public static void loadRoundImage(final Context context, String url,final ImageView imageView){     Glide.with(context)         .load(url)         .asBitmap()         .placeholder(placeholder)         .error(placeholder)         .diskCacheStrategy(DiskCacheStrategy.ALL) //设置缓存         .into(new BitmapImageViewTarget(imageView){           @Override           protected void setResource(Bitmap resource) {             super.setResource(resource);             RoundedBitmapDrawable circularBitmapDrawable =                 RoundedBitmapDrawableFactory.create(context.getResources(), resource);             circularBitmapDrawable.setCornerRadius(10); //设置圆角弧度             imageView.setImageDrawable(circularBitmapDrawable);           }         });   }  //加载圆形图片  public static void loadCirclePic(final Context context, String url, final ImageView imageView) {    Glide.with(context)        .load(url)        .asBitmap()        .placeholder(placeholder)        .error(placeholder)        .diskCacheStrategy(DiskCacheStrategy.ALL) //设置缓存        .into(new BitmapImageViewTarget(imageView) {          @Override          protected void setResource(Bitmap resource) {            RoundedBitmapDrawable circularBitmapDrawable =                RoundedBitmapDrawableFactory.create(context.getResources(), resource);            circularBitmapDrawable.setCircular(true);            imageView.setImageDrawable(circularBitmapDrawable);          }        });  }

public static Bitmap drawableToBitmap(Drawable drawable) {    // 取 drawable 的长宽    int w = drawable.getIntrinsicWidth();    int h = drawable.getIntrinsicHeight();    // 取 drawable 的颜色格式    Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888        : Bitmap.Config.RGB_565;    // 建立对应 bitmap    Bitmap bitmap = Bitmap.createBitmap(w, h, config);    // 建立对应 bitmap 的画布    Canvas canvas = new Canvas(bitmap);    drawable.setBounds(0, 0, w, h);    // 把 drawable 内容画到画布中    drawable.draw(canvas);    return bitmap;  }/** * RoundedBitmapDrawable 是 V4 下的一个类，不能简单的通过：强制转换成 BitmapDrawable * Bitmap bitmap = ((BitmapDrawable)xxx).getBitmap(); */