有人问过这个问题，并且我正在使用毕加索的版本：我如何使用Picasso将圆形位图发送到ImageView？我是毕加索的新手，我唯一使用的是
Picasso.with(context).load(url).resize(w, h).into(imageview);
我已经找到https://gist.github.com/julianshen/5829333，但我不确定如何以非尴尬的方式将它与上面的行结合起来。
答案 0 :(得分：264)
之前研究一下，因为有可用的答案。无论如何，请关注This Link并仔细阅读以了解如何使用它。
试试这个：
import com.squareup.picasso.Transformation;
public class CircleTransform implements Transformation {
@Override
public Bitmap transform(Bitmap source) {
int size = Math.min(source.getWidth(), source.getHeight());
int x = (source.getWidth() - size) / 2;
int y = (source.getHeight() - size) / 2;
Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
if (squaredBitmap != source) {
source.recycle();
}
Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
BitmapShader shader = new BitmapShader(squaredBitmap,
BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
paint.setShader(shader);
paint.setAntiAlias(true);
float r = size / 2f;
canvas.drawCircle(r, r, r, paint);
squaredBitmap.recycle();
return bitmap;
}
@Override
public String key() {
return "circle";
}
}
然后简单地应用它：
Picasso.with(activity).load(mayorShipImageLink).transform(new CircleTransform()).into(ImageView);
答案 1 :(得分：40)
这是 support-v4库提供的内容！调查 RoundedBitmapDrawable。无需自己动手：
Picasso.with(context).load(url)
.resize(w, h)
.into(myImageView, new Callback() {
@Override
public void onSuccess() {
Bitmap imageBitmap = ((BitmapDrawable) myImageView.getDrawable()).getBitmap();
RoundedBitmapDrawable imageDrawable = RoundedBitmapDrawableFactory.create(getResources(), imageBitmap);
imageDrawable.setCircular(true);
imageDrawable.setCornerRadius(Math.max(imageBitmap.getWidth(), imageBitmap.getHeight()) / 2.0f);
myImageView.setImageDrawable(imageDrawable);
}
@Override
public void onError() {
myImageView.setImageResource(R.drawable.default_image);
}
});
注意：Picasso还有一个理论上可以使用的 .transform（customTransformation）调用，但是，我遇到了问题。以上工作原理。祝你好运！
答案 2 :(得分：16)
我找到的另一个选择是这个人库。它可以单独使用，也可以与毕加索一起使用。我选择了毕加索的路线，如下所示：
https://github.com/vinc3m1/RoundedImageView
Transformation transformation = new RoundedTransformationBuilder()
.borderColor(Color.BLACK)
.borderWidthDp(3)
.cornerRadiusDp(30)
.oval(false)
.build();
Picasso.with(context)
.load(url)
.fit()
.transform(transformation)
.into(imageView);
为我工作！
答案 3 :(得分：10)
我已经尝试了上面的所有解决方案，但没有一个给我圆形变换而没有裁剪图片。这个解决方案只适用于宽度和高度相同的图像..这是我上面的解决方案
首先------
Picasso.with(getActivity())
.load(url)
.error(R.drawable.image2)
.placeholder(R.drawable.ic_drawer)
.resize(200, 200)
.transform(new ImageTrans_CircleTransform())
.into(imageView1);
然后这样做--------
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Shader.TileMode;
import com.squareup.picasso.Transformation;
public class ImageTrans_CircleTransform implements Transformation {
@Override
public Bitmap transform(Bitmap source) {
if (source == null || source.isRecycled()) {
return null;
}
final int width = source.getWidth() + borderwidth;
final int height = source.getHeight() + borderwidth;
Bitmap canvasBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(source, TileMode.CLAMP, TileMode.CLAMP);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setShader(shader);
Canvas canvas = new Canvas(canvasBitmap);
float radius = width > height ? ((float) height) / 2f : ((float) width) / 2f;
canvas.drawCircle(width / 2, height / 2, radius, paint);
//border code
paint.setShader(null);
paint.setStyle(Paint.Style.STROKE);
paint.setColor(bordercolor);
paint.setStrokeWidth(borderwidth);
canvas.drawCircle(width / 2, height / 2, radius - borderwidth / 2, paint);
//--------------------------------------
if (canvasBitmap != source) {
source.recycle();
}
return canvasBitmap;
}
@Override
public String key() {
return "circle";
}
}
答案 4 :(得分：7)
使用此库创建圆形图像视图。 To make a circular ImageView, add this CircularImageView library to your project 并在布局XML中添加CircularImageView
<com.pkmmte.view.CircularImageView
android:layout_width="250dp"
android:layout_height="250dp"
android:src="@drawable/image"
app:border_color="#EEEEEE"
app:border_width="4dp"
app:shadow="true" />`
然后使用毕加索将所需图像加载到此imageView中。 Picasso做了你不需要担心的所有缓存
答案 5 :(得分：2)
包含类型为Layer-list的xml drawable，其代码如下
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/shape_status">
<shape android:shape="oval">
<solid android:color="@android:color/black"/>
</shape>
</item>
<item android:drawable="@drawable/ic_status_content"/></layer-list>
然后将xml用于android.src
中的ImageView <ImageView
android:id="@+id/iconStatus"
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_gravity="right"
android:src="@drawable/ic_circle_status"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"/>
答案 6 :(得分：2)
这个对我有用
<com.androidhub4you.crop.RoundedImageView
android:id="@+id/imageView_round"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="15dp"
android:src="@drawable/ic_launcher" />
http://www.androidhub4you.com/2014/10/android-custom-shape-imageview-rounded.html
答案 7 :(得分：2)
添加gradle依赖
implementation 'jp.wasabeef:picasso-transformations:2.2.1'
最终使用它
Picasso.with(context)
.load(url)
.resize(w, h)
.transform(new CropCircleTransformation())
.into(imageview);
答案 8 :(得分：0)
此版本正在使用当前的Picasso 3快照：
class CircleTransformation : Transformation {
override fun transform(source: RequestHandler.Result): RequestHandler.Result {
if (source.bitmap == null) {
return source
}
var bitmap: Bitmap
// since we cant transform hardware bitmaps create a software copy first
if (VERSION.SDK_INT >= VERSION_CODES.O && source.bitmap!!.config == Config.HARDWARE) {
val softwareCopy = source.bitmap!!.copy(Config.ARGB_8888, true)
if (softwareCopy == null) {
return source
} else {
bitmap = softwareCopy
source.bitmap!!.recycle()
}
} else {
bitmap = source.bitmap!!
}
var size = bitmap.width
// if bitmap is non-square first create square one
if (size != bitmap.height) {
var sizeX = size
var sizeY = bitmap.height
size = Math.min(sizeY, sizeX)
sizeX = (sizeX - size) / 2
sizeY = (sizeY - size) / 2
val squareSource = Bitmap.createBitmap(bitmap, sizeX, sizeY, size, size)
bitmap.recycle()
bitmap = squareSource
}
val circleBitmap = Bitmap.createBitmap(size, size, Config.ARGB_8888)
val canvas = Canvas(circleBitmap)
val paint = Paint()
val shader = BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP)
paint.shader = shader
paint.isAntiAlias = true
val centerAndRadius = size / 2f
canvas.drawCircle(centerAndRadius, centerAndRadius, centerAndRadius, paint)
bitmap.recycle()
return RequestHandler.Result(circleBitmap, source.loadedFrom, source.exifRotation)
}
override fun key(): String {
return "circleTransformation()"
}
}
Picasso3要点：https://gist.github.com/G00fY2/f3fbc468570024930c1fd9eb4cec85a1
答案 9 :(得分：0)
以下是Picasso v2.71828对我有用的内容
.authorizeRequests().antMatchers("/property-finance/**").authenticated()
.and()
.authorizeRequests()
}