Question

我有一个listview，其中包含一个自定义适配器，其中有一个imageview。这个imageview将是循环的，我使用这个类：

public class CircularImageView extends ImageView {

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

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

public CircularImageView(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);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);


            return output;
}

}

如果我写在我的布局xml

 <com.myapp.utility.CircularImageView
            android:id="@+id/image"
            android:layout_centerVertical="true"
            android:layout_width="75dp"
            android:layout_height="75dp"
            android:layout_marginLeft="16dp"
            android:adjustViewBounds="true"
            android:src="@drawable/icon"
            android:scaleType="centerCrop" />

有效！我把那个图像四舍五入。但是imageview不止一个，并且以这种方式添加到适配器：

   @Override 
        public View getView(int i, View view, ViewGroup viewGroup) {

            if (view == null) {
                view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.grid_item, viewGroup, false);
            }

            ImageView image = (ImageView) view.findViewById(R.id.image);
            image.setBackgroundResource(myImageList[i]);  


            TextView text = (TextView) view.findViewById(R.id.text);
            text.setText(names[i]);
            TextView textSpec = (TextView) view.findViewById(R.id.text_spec);
            textSpec.setText(ruolo[i]);

            return view;
        }

在这里：image.setBackgroundResource(myImageList[i]);我设置了我的图像，但是当我将图像设置为静态时，我无法将图像显示为圆形。我也试着写：

CircularImageView image = (CircularImageView) view.findViewById(R.id.image);

但仍然没有改变......有什么不对？

无法将圆形imageview放在适配器中

0 个答案: