机器人: 用毕加索创建圆形图像

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最佳答案

Research a bit before as there are answers available. Anyhow, follow This Link and read it carefully to know how to use it.

try this:

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,
Shader.TileMode.CLAMP, Shader.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";
}
}

then simply apply it like:

Picasso.with(activity).load(mayorShipImageLink).transform(new CircleTransform()).into(ImageView);

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Use this library to create a circular imageview. To make a circular ImageView, add this CircularImageView library to your project and add CircularImageView in your layout XML

<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" />`

Then use picasso to load required image into this imageView. Picasso does all the caching you dont need to worry about it

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I have tried all solutions above but none of them gives me circle transform without cropping picture..those solution will work only for images with same width and height..this is my solution on above

first ------

Picasso.with(getActivity())
.load(url)
.error(R.drawable.image2)
.placeholder(R.drawable.ic_drawer)
.resize(200, 200)
.transform(new ImageTrans_CircleTransform())
.into(imageView1);

then do this --------

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";
}
}

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Another alternative I found was this guys library. It works standalone, or in conjunction with Picasso. I chose the Picasso route, like below:

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);

Worked for me!

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Include the xml drawable of type Layer- list with the code below

<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>

then use the xml to your ImageView in the android.src

 <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"/>

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here is something that's provided by the support-v4 library! Look into RoundedBitmapDrawable. No need to roll your own:

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);
}
});

Note: Picasso also has a .transform(customTransformation) call that you could theoretically use, however, I had issues with that. This above works. Good luck!

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This one is working with the current Picasso 3 snapshot:

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 gist: https://gist.github.com/G00fY2/f3fbc468570024930c1fd9eb4cec85a1

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There is a transformation library for Picasso.

Just add gradle dependency

implementation 'jp.wasabeef:picasso-transformations:2.4.0'

End use it

Picasso.with(context)
.load(url)
.resize(w, h)
.transform(new CropCircleTransformation())
.into(imageview);

Wiki: Picasso Transformations

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Here is what worked for me with Picasso v2.71828

class CircleTransform : Transformation {
override fun transform(source: Bitmap?): Bitmap? {
if (source == null) {
return source
}


var bitmap: Bitmap


// since we cant transform hardware bitmaps create a software copy first
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && source.config == Bitmap.Config.HARDWARE) {
val softwareCopy = source.copy(Bitmap.Config.ARGB_8888, true)
if (softwareCopy == null) {
return source
} else {
bitmap = softwareCopy
source.recycle()
}
} else {
bitmap = source
}


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, Bitmap.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 circleBitmap
}




override fun key(): String {
return "circleTransformation()"
}

}

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@Anirudh Sharma has a great answer. This is his answer translated to Kotlin.

class CircleTransform : Transformation {
override fun transform(source: Bitmap): Bitmap {
val size = Math.min(source.width, source.height)
val x = (source.width - size) / 2
val y = (source.height - size) / 2
val squaredBitmap = Bitmap.createBitmap(source, x, y, size, size)
if (squaredBitmap != source) {
source.recycle()
}
val bitmap = Bitmap.createBitmap(size, size, source.config)
val canvas = Canvas(bitmap)
val paint = Paint()
val shader = BitmapShader(
squaredBitmap,
Shader.TileMode.CLAMP, Shader.TileMode.CLAMP
)
paint.shader = shader
paint.isAntiAlias = true
val r = size / 2f
canvas.drawCircle(r, r, r, paint)
squaredBitmap.recycle()
return bitmap
}


override fun key(): String {
return "circle"
}
}