标签：android-bitmap android performance android-imageview

我有一个带有联系人图像和姓名或电话号码的ListView.现在,我想在此联系人图像的角上画上圆角.

public View getView(final int position, View convertView, ViewGroup parent) {
    View row = convertView;
    UserHolder holder = null;
    Log.d("main", "pos:" + "" + position);

            if (row == null) {
        LayoutInflater inflater = ((Activity) context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);
        holder = new UserHolder();
        holder.Name = (TextView) row.findViewById(R.id.name);

        holder.Number = (TextView) row.findViewById(R.id.number);

        holder.img=(ImageView) row.findViewById(R.id.image);


        Typeface face=Typeface.createFromAsset(context.getAssets(),"helve.ttf");

        holder.Name.setTypeface(face);
        //holder.Number.setTypeface(face);

        //bit = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);     
       //

        //holder.img.setImageBitmap(getRoundedCornerBitmap(bit, 40));

        row.setTag(holder);
    } else {
        holder = (UserHolder) row.getTag();
    }
    User user = data.get(position); 

    holder.Name.setText(user.getName());
    holder.img.setImageBitmap(user.getbi());
    //holder.img.setImageBitmap(roundCornerImage(BitmapFactory.decodeResource(user.getbi(), R.drawable.ic_launcher),60));
    holder.Number.setText(user.getNumber());




    // Give Different Back Ground To List View---------------------------------------------

    if ((position % 2) == 0) {
        row.setBackgroundResource(R.drawable.list_dark);
    } else {
        row.setBackgroundResource(R.drawable.list_light);
    }




    Log.d("main", "pos:" + "" + position);

    return row;

}



static class UserHolder {
    TextView Name,Number;
    ImageView img;

}

如何在此图像上添加圆角？我有点困惑,我必须做什么样的改变.

解决方法:

嗨,请使用此自定义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);
}

@SuppressLint("Instantiatable")
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);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);

    return output;
}

}

标签：android-bitmap,android,performance,android-imageview
来源： https://codeday.me/bug/20191009/1882846.html

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