Android利用glide加载圆形图片,头像的实现

主要是用到了RoundedBitmapDrawable这个类是Drawable的一个子抽象类

可以实现从文件路径,输入流或bitmap 的对象都可以转换成圆形,或圆角,就不用使用第三方了,很方便

如果要转换成圆形,要用到下面这个方法;

/**
* Sets the image shape to circular.
* <p>This overwrites any calls made to {@link #setCornerRadius(float)} so far.</p>
*/
public void setCircular(boolean circular) {
mIsCircular = circular;
mApplyGravity = true;
if (circular) {
updateCircularCornerRadius();
mPaint.setShader(mBitmapShader);
invalidateSelf();
} else {
setCornerRadius(0);
}
}

下面这个是类的说明,可以看一下

/**
* A Drawable that wraps a bitmap and can be drawn with rounded corners. You can create a
* RoundedBitmapDrawable from a file path, an input stream, or from a
* {@link android.graphics.B或itmap} object.
* <p>
* Also see the {@link android.graphics.Bitmap} class, which handles the management and
* transformation of raw bitmap graphics, and should be used when drawing to a
* {@link android.graphics.Canvas}.
* </p>
*/

具体的使用如下配合glide

//加载圆形头像
Glide.with(context).load(data.get(position).getMenu_img().toString())
.asBitmap().centerCrop().into(new BitmapImageViewTarget(holder.gridIcon) {
@Override

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protected void setResource(Bitmap resource) {
RoundedBitmapDrawable circularBitmapDrawable =
RoundedBitmapDrawableFactory.create(context.getResources(), resource);
circularBitmapDrawable.setCircular(true);
holder.gridIcon.setImageDrawable(circularBitmapDrawable);
}
});