android ImageView画图添加数字显示

最新推荐文章于 2021-12-23 12:59:21 发布

dongyang11

最新推荐文章于 2021-12-23 12:59:21 发布

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分类专栏： android开发文章标签：移动开发人工智能

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本文介绍了一个名为 ImageNumberView 的自定义视图类，用于在给定图片的右上角添加联系人数量，并提供了详细实现过程，包括画图、文字显示等关键步骤。

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public class ImageNumberView extends ImageView
{
public String number;
private PaintFlagsDrawFilter pfd;
Resources res = getResources();

public ImageNumberView(Context context)
{
super(context);
}

public ImageNumberView(Context context, AttributeSet set)
{

super(context, set);
}

// 画图类
// public void onDraw(Canvas canvas)
// {
//
//  super.onDraw(canvas);
//  Paint mPaint = new Paint();
//  pfd = new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
//  canvas.setDrawFilter(pfd);
//
//  String familyName = "Arial Rounded MT Bold";
//  Typeface font = Typeface.create(familyName, Typeface.BOLD);
//  mPaint.setColor(Color.BLACK);
//  mPaint.setTypeface(font);
//  mPaint.setTextSize(20);
//  if (number != null && !number.equals("0"))
//  {
//   if (number != null && number.length() == 1)
//   {
//    Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.num_bg3);
//
//    canvas.drawBitmap(bmp, this.getWidth()-bmp.getWidth(), this.getHeight()-bmp.getHeight(), mPaint);
//    canvas.drawText(number, this.getWidth()-bmp.getWidth()/2-5, this.getHeight()-bmp.getHeight()/2+6, mPaint);
//   } else if (number != null && number.length() == 2)
//   {
//    Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.num_bg2);
//    canvas.drawBitmap(bmp, 17, 12, mPaint);
//    canvas.drawText(number, 24, 21, mPaint);
//   } else if (number != null && number.length() == 3)
//   {
//    Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.num_bg3);
//    canvas.drawBitmap(bmp, 12, 12, mPaint);
//    canvas.drawText(number, 19, 21, mPaint);
//   }
//  }
//
// }

    /**
     * 在给定的图片的右上角加上联系人数量。数量用红色表示
     * @param icon 给定的图片
     * @return 带联系人数量的图片
     */
    public Bitmap generatorContactCountIcon(Bitmap icon,int number){
        //初始化画布
//        int iconSize=(int)getResources().getDimension(android.R.dimen.app_icon_size);
//        Log.d(TAG, "the icon size is "+iconSize);

//         Bitmap contactIcon=Bitmap.createBitmap(this.getWidth(), this.getHeight(), Config.ARGB_8888);
       Bitmap contactIcon=Bitmap.createBitmap(icon.getWidth(), icon.getHeight(), Config.ARGB_8888);
       Canvas canvas=new Canvas(contactIcon);

       //拷贝图片
       Paint iconPaint=new Paint();
       iconPaint.setDither(true);//防抖动
       iconPaint.setFilterBitmap(true);//用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
       Rect src=new Rect(0, 0, icon.getWidth(), icon.getHeight());
       Rect dst=new Rect(0, 0, icon.getWidth(), icon.getHeight());
       canvas.drawBitmap(icon, src, dst, iconPaint);

       //在图片上创建一个覆盖的联系人个数
       int contacyCount=number;
       Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.num_bg3);
       //启用抗锯齿和使用设备的文本字距
       Paint countPaint=new Paint(Paint.ANTI_ALIAS_FLAG|Paint.DEV_KERN_TEXT_FLAG);
//       countPaint.setColor(Color.parseColor("#f63003"));
       countPaint.setColor(Color.WHITE);
       countPaint.setTextSize(35);
       countPaint.setTypeface(Typeface.DEFAULT_BOLD);
       countPaint.setAntiAlias(true);
//       countPaint.setShadowLayer (5, 3, 3, 0xFF000000);//加阴影

       canvas.drawBitmap(bmp, 135, 1, countPaint);
       canvas.drawText(String.valueOf(contacyCount), 143, 35, countPaint);
       return contactIcon;
   }

public String getNumber()
{
  return number;
}

public void setNumber(String number)
{
this.number = number;
}

}