public final class StringToBitmap {

public static Bitmap getBitmapFromSingleLineString(String text, int textColor, int backgroundColor, String fontType,
int fontSize, int bitmapWidth, int bitmapHeight, Paint.Align align) {
Bitmap bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
// 背景颜色
canvas.drawColor(backgroundColor);
TextPaint paint = new TextPaint();

Typeface typeface = Typeface.create(fontType, Typeface.NORMAL);
// 消除锯齿
paint.setAntiAlias(true);
// 字体为红色
paint.setColor(textColor);
paint.setTypeface(typeface);
paint.setTextSize(fontSize);
paint.setTextAlign(align);

CharSequence truncateText = TextUtils.ellipsize(text, paint
, bitmapWidth, TextUtils.TruncateAt.END);
// 绘制字体
canvas.drawText(truncateText, 0, truncateText.length(), 0, bitmapHeight - 1, paint);
return bitmap;
}
}

仅仅是上面的处理还不够，生成了一个Bitmap，还需要转变成纹理。

Angle类库中的AngleTextureEngine只能从Resouce中加载纹理。第一步，我修改了AngleTextureEngine类，添加了下面的方法以便从已有的Bitmap生成纹理对象。

public AngleTexture createTextureFromBitmap(Bitmap bitmap)
{
AngleTexture tex = null;
Iterator it = mTexturesX.iterator();
while (it.hasNext())
{
tex = it.next();
if (tex instanceof AngleBitmapTexture)
{
// Texture already exists
if (((AngleBitmapTexture) tex).mBitmap == bitmap)
{
tex.mRefernces++;
return tex;
}
}
}

tex = new AngleBitmapTexture(this, bitmap);
mTexturesX.add(tex);
return tex;
}