Question

CODE：

public final void SetBitmapImage(Bitmap paramBitmap, int color, float percentage)
  {
    float f = percentage * -360.0F;        
    int i = paramBitmap.getWidth();
    int j = paramBitmap.getHeight();
    Paint localPaint1 = new Paint(ANTI_ALIAS_FLAG);
    Paint localPaint2 = new Paint(ANTI_ALIAS_FLAG);
    Paint localPaint3 = new Paint(ANTI_ALIAS_FLAG);
    Bitmap localBitmap1 = Bitmap.createBitmap(i, j, Bitmap.Config.ARGB_8888);
    Canvas localCanvas1 = new Canvas(localBitmap1);
    localCanvas1.rotate(-90.0F, i / 2.0F, j / 2.0F);
    RectF localRectF = new RectF(0.0F, 0.0F, i, j);
    localPaint1.setStrokeWidth(2.0F);
    localPaint1.setStyle(Paint.Style.FILL);
    localPaint2.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
    Bitmap localBitmap2 = paramBitmap; // this should include color I think but don't know how
    localCanvas1.drawArc(localRectF, 0.0F, f, true, localPaint1);
    Bitmap localBitmap3 = Bitmap.createBitmap(localBitmap1.getWidth(), localBitmap1.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas localCanvas2 = new Canvas(localBitmap3);
    localCanvas2.drawBitmap(paramBitmap, 0.0F, 0.0F, localPaint3);
    localCanvas2.drawBitmap(localBitmap1, 0.0F, 0.0F, localPaint2);
    Bitmap localBitmap4 = Bitmap.createBitmap(localBitmap2.getWidth(), localBitmap2.getHeight(), localBitmap2.getConfig());
    Canvas localCanvas3 = new Canvas(localBitmap4);
    localCanvas3.drawBitmap(localBitmap2, new Matrix(), null);
    localCanvas3.drawBitmap(localBitmap3, 0.0F, 0.0F, null);
    localBitmap2.recycle();
    localBitmap3.recycle();
    localBitmap1.recycle();
    setImageBitmap(localBitmap4);
  }

但图像仍然相同。我希望70％的图像保持白色，30％红色。

我认为问题出在Bitmap localBitmap2。

Bitmap localBitmap2 = paramBitmap; // this should include color I think but don't know how

应该是这样的：

Bitmap localBitmap2 = Something(paramBitmap, color); which will set the color

Answer 1

在android中，当你设置一个十六进制代码时，＃后面的前6位是普通代码，并且透明后有一个可选的2位数字。

#000000 = black
#00000000 = fully transparent

鉴于最后两位数字必须是十六进制格式，您需要选择0到255之间的范围，然后将其转换回十六进制。

提示：您可以使用程序员中的Windows计算器来完成此操作。模式。：）

示例：

30％不透明度：255 * 0.70 = 178. 178转换为十六进制= B2。

因此，将B2添加到您拥有的任何颜色代码的末尾，它将是30％不透明。

#000000B2

希望这有帮助。

Android将图表颜色从白色变为红色但只有30％

1 个答案: