[英]Cropping square image into circular image in android
我希望將正方形圖像轉換為圓形圖像並顯示在imageview中。 圖像1是必需的輸出,圖像2是方形源圖像,圖像3是下面粘貼的代碼的當前輸出。 下面粘貼了用於裁剪方形圖像並轉換為圓形圖像的代碼。 請看看並更正它。
private Bitmap cutCenterSquare(Bitmap bitmap) {
Bitmap origialBitmap = bitmap;
Bitmap cutBitmap = Bitmap.createBitmap(origialBitmap.getWidth() / 2,
origialBitmap.getHeight() / 2, Config.ARGB_8888);
Canvas canvas = new Canvas(cutBitmap);
Rect desRect = new Rect(0,0,(int)(imageview.getWidth()*0.94-imageview.getWidth()*0.06),(int)(imageview.getHeight()*0.725-imageview.getHeight()*0.16));
Rect srcRect = new Rect((int)(imageview.getWidth()*0.06),(int)(imageview.getHeight()*0.16),
(int)(imageview.getWidth()*0.94),
(int)(imageview.getHeight()*0.725));
canvas.drawBitmap(origialBitmap, srcRect, desRect, null);
return cutBitmap;
}
public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
Bitmap sbmp;
if(bmp.getWidth() != radius || bmp.getHeight() != radius)
sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);
else
sbmp = bmp;
Bitmap output = Bitmap.createBitmap(sbmp.getWidth(), sbmp.getHeight(), Bitmap.Config.ARGB_8888);
final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
paint.setColor(Color.parseColor("#646464"));
Canvas c = new Canvas(output);
c.drawARGB(0, 0, 0, 0);
c.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f, sbmp.getWidth() / 2+0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
c.drawBitmap(sbmp, rect, rect, paint);
return output;
}
<ImageView
android:id="@+id/profile_image"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginBottom="8dp"
android:layout_marginTop="24dp"
android:background="@drawable/background_circle"
android:contentDescription=""
android:scaleType="centerCrop"/>
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid
android:color="#646464"/>
<size
android:width="1dp"
android:height="1dp"/>
</shape>
注意您的代碼。 您正在內存中使用2位圖。
關於圓角圖像有一篇非常有趣的文章: http : //www.curious-creature.org/2012/12/11/android-recipe-1-image-with-rounded-corners/
它由Romain Guy(Google的前Android團隊)編寫。
您可以使用類似的代碼編寫圓形位圖:
public class CircleDrawable extends Drawable {
private final BitmapShader mBitmapShader;
private final Paint mPaint;
private Paint mWhitePaint;
int circleCenterX;
int circleCenterY;
int mRadus;
private boolean mUseStroke = false;
private int mStrokePadding = 0;
public CircleDrawable(Bitmap bitmap) {
mBitmapShader = new BitmapShader(bitmap,
Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setShader(mBitmapShader);
}
public CircleDrawable(Bitmap bitmap, boolean mUseStroke) {
this(bitmap);
if (mUseStroke) {
this.mUseStroke = true;
mStrokePadding = 4;
mWhitePaint = new Paint();
mWhitePaint.setStyle(Paint.Style.FILL_AND_STROKE);
mWhitePaint.setStrokeWidth(0.75f);
mWhitePaint.setColor(Color.WHITE);
}
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
circleCenterX = bounds.width() / 2;
circleCenterY = bounds.height() / 2;
if (bounds.width() >= bounds.height())
mRadus = bounds.width() / 2;
else
mRadus = bounds.height() / 2;
}
@Override
public void draw(Canvas canvas) {
if (mUseStroke) {
canvas.drawCircle(circleCenterX, circleCenterY, mRadus, mWhitePaint);
}
canvas.drawCircle(circleCenterX, circleCenterY, mRadus - mStrokePadding, mPaint);
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
}
public boolean ismUseStroke() {
return mUseStroke;
}
public void setmUseStroke(boolean mUseStroke) {
this.mUseStroke = mUseStroke;
}
}
要使用它:
CircleDrawable circle = new CircleDrawable(bitmap,true);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
imageView.setBackground(circle);
else
imageView.setBackgroundDrawable(circle);
您可以在github中查看此項目。 它提供了一種以XML方式和以編程方式設置圖像的方法,並在圖像頂部顯示了可調整大小的圓形裁剪窗口。 然后,調用方法getCroppedCircleImage()將返回圓形裁剪窗口標記的圓形位圖。 也許這可以派上用場。 CIrcleImageCropper
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