برش( Crop ) عکس و نمایش آن به شکل دایره ای

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:foreground="@drawable/overlay"
android:foregroundGravity="center"
>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/avatar"
/>
</FrameLayout>
 
</FrameLayout>

خوبی این روش اینه که هیچ پردازش و کدی نداره و سمت xml کار انجام میشه

import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;
 
/**
* A Drawable that draws an oval with given {@link Bitmap}
*/
public class RoundedAvatarDrawable extends Drawable {
private final Bitmap mBitmap;
private final Paint mPaint;
private final RectF mRectF;
private final int mBitmapWidth;
private final int mBitmapHeight;
 
public RoundedAvatarDrawable(Bitmap bitmap) {
mBitmap = bitmap;
mRectF = new RectF();
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
final BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint.setShader(shader);
 
// NOTE: we assume bitmap is properly scaled to current density
mBitmapWidth = mBitmap.getWidth();
mBitmapHeight = mBitmap.getHeight();
}
 
@Override
public void draw(Canvas canvas) {
canvas.drawOval(mRectF, mPaint);
}
 
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
 
mRectF.set(bounds);
}
 
@Override
public void setAlpha(int alpha) {
if (mPaint.getAlpha() != alpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
}
 
@Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
}
 
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
 
@Override
public int getIntrinsicWidth() {
return mBitmapWidth;
}
 
@Override
public int getIntrinsicHeight() {
return mBitmapHeight;
}
 
public void setAntiAlias(boolean aa) {
mPaint.setAntiAlias(aa);
invalidateSelf();
}
 
@Override
public void setFilterBitmap(boolean filter) {
mPaint.setFilterBitmap(filter);
invalidateSelf();
}
 
@Override
public void setDither(boolean dither) {
mPaint.setDither(dither);
invalidateSelf();
}
 
public Bitmap getBitmap() {
return mBitmap;
}
 
// TODO allow set and use target density, mutate, constant state, changing configurations, etc.