Question

这个适配器对于圆形图像视图非常有用，但圆形图像视图可以从右到左，不可能从左到右，所以请建议我在这段代码中应该写什么，这样图像可以从左边看到圆形对吧？

public class ImageAdapterCircleGallery extends BaseAdapter {

    private Context mContext;
    int itemBackground;

    Integer[] mImageIds = { R.drawable.img1, R.drawable.img2,
            R.drawable.img3, R.drawable.img4, R.drawable.img5,
            R.drawable.img6, R.drawable.img7, R.drawable.img8,
            R.drawable.img9, R.drawable.img10, R.drawable.img11,
            R.drawable.img12, R.drawable.img13, R.drawable.img14,
            R.drawable.img15, R.drawable.img16, R.drawable.img17,
            R.drawable.img18, R.drawable.img19, R.drawable.img20,
            R.drawable.img21, R.drawable.img22, R.drawable.img23,
            R.drawable.img24, R.drawable.img25, R.drawable.img26,
            R.drawable.img27, R.drawable.img28, R.drawable.img29,
            R.drawable.img30 };

    public ImageAdapterCircleGallery(Context c) {
        mContext = c;

        TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
        itemBackground = a.getResourceId(
                R.styleable.Gallery1_android_galleryItemBackground, 1);
        a.recycle();
    }

    public int getCount() {
        return Integer.MAX_VALUE;
    }

    public Object getItem(int position) {

        return getPosition(position);
    }

    public long getItemId(int position) {
        return getPosition(position);
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        /*ImageView i = new ImageView(mContext);
        position = getPosition(position);
        i.setImageResource(mImageIds[position]);
        i.setLayoutParams(new Gallery.LayoutParams(100, 100));
        i.setScaleType(ImageView.ScaleType.FIT_CENTER);
        return i;*/

        ImageView imageView = new ImageView(mContext);
        position = getPosition(position);
        imageView.setImageResource(imageIDs[position]);
        imageView.setAdjustViewBounds(true);
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        imageView.setLayoutParams(new Gallery.LayoutParams(90, 90));
        imageView.setBackgroundResource(itemBackground);

        return imageView;

    }

    public int checkPosition(int position) {
        return getPosition(position);
    }

    int getPosition(int position) {
        if (position >= mImageIds.length) {
            position = position % mImageIds.length;
        }
        return position;
    }
}

Answer 1

将我的代码用于圆角ImageView。它可以确保无论您在其中设置什么图像，它都将完美呈现： -

package com.example.listviewwithimages;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class RoundedImageView extends ImageView {

public RoundedImageView(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
}

public RoundedImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@Override
protected void onDraw(Canvas canvas) {

    Drawable drawable = getDrawable();

    if (drawable == null) {
        return;
    }

    if (getWidth() == 0 || getHeight() == 0) {
        return; 
    }
    Bitmap b =  ((BitmapDrawable)drawable).getBitmap() ;
    Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);

    int w = getWidth(), h = getHeight();


    Bitmap roundBitmap =  getCroppedBitmap(bitmap, w);
    canvas.drawBitmap(roundBitmap, 0,0, null);

}

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(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xffa19774;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

    paint.setAntiAlias(true);
    paint.setFilterBitmap(true);
    paint.setDither(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(Color.parseColor("#BAB399"));
//    canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,
//            sbmp.getWidth() / 2+0.1f, paint);
    canvas.drawCircle(sbmp.getWidth()/2, sbmp.getHeight()/2,
            (sbmp.getWidth()/2), paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);


            return output;
}

}

并在你的xml中，像这样使用它： -

 <com.example.listviewwithimages.RoundedImageView
    android:id="@+id/image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:adjustViewBounds="true"
    android:contentDescription="Big Image" />

适配器中的

，在getView（）

中

        RoundedImageView imageView = new RoundedImageView(mContext);

在Android中的图库图像循环

1 个答案: