Android——圆角的几种方式

1.Shape drawable

res/drawable/round_outline.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<corners android:radius="10dp" />
</shape>

设置ImageView的background，src即可

2.

Xfermode

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

3.

BitmapShader

主要代码：

paint.setShader(new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));

4.

RoundedBitmapDrawable

需要加上v21 of the Support library
主要代码:

RoundedBitmapDrawabledr = RoundedBitmapDrawableFactory.create(res, src);
dr.setCornerRadius(cornerRadius);

(1)ImageLoader

DisplayImageOptions options = new DisplayImageOptions.Builder()
// this will make circle, pass the width of image
.displayer(new.RoundedBitmapDisplayer(getResources().getDimensionPixelSize(R.dimen.image_dimen_menu)))
.cacheOnDisc(true)
.build();

(2) Picasso

Picasso.with(mContext)
.load(com.app.utility.Constants.BASE_URL+b.image)
.placeholder(R.drawable.profile)
.error(R.drawable.profile)
.transform(new RoundedTransformation(50, 4))
.resizeDimen(R.dimen.list_detail_image_size, R.dimen.list_detail_image_size)
.centerCrop()
.into(v.im_user);