如何将 RTL 文本（阿拉伯语）绘制到位图上并使其正确排序？
我正在尝试将阿拉伯文本绘制到位图上进行显示：
Bitmap img = Bitmap.createBitmap( (int) f+100, 300, Config.RGB_565);
Canvas c = new Canvas();
c.setBitmap( img );
mFace = Typeface.createFromAsset(getAssets(),"DejaVuSansCondensed.ttf");
mPaint.setTypeface(mFace);
content = "يجري";
content = ArabicUtilities.reshape( content );
System.out.println("Drawing text: " + content);
c.drawText(content, 30, 30, mPaint);
ArabicUtilities 类是一个用于重塑 unicode 文本以便将字母连接起来的工具。请参阅：http://github.com/aawish/Better-Arabic-Reshaper/
但是，生成的位图如下所示：
alt text http://imagebin.ca/img/ J1EB8DWc.jpg
当它看起来像 из рий 时，
我相信问题是因为，不像TextView，Bitmap 类不支持 BiDi，因此它从左侧绘制字母进行书写。
尽我所能，我无法弄清楚如何以正确的顺序绘制文本。
I'm trying to draw Arabic text onto a Bitmap for display:
Bitmap img = Bitmap.createBitmap( (int) f+100, 300, Config.RGB_565);
Canvas c = new Canvas();
c.setBitmap( img );
mFace = Typeface.createFromAsset(getAssets(),"DejaVuSansCondensed.ttf");
mPaint.setTypeface(mFace);
content = "يجري";
content = ArabicUtilities.reshape( content );
System.out.println("Drawing text: " + content);
c.drawText(content, 30, 30, mPaint);
The ArabicUtilities class is a tool to reshape the unicode text so the letters are connected. see: http://github.com/agawish/Better-Arabic-Reshaper/
However, the bitmap that is generated looks like this:
alt text http://imagebin.ca/img/J1EB8DWc.jpg
When it should look like يجري
I believe the issue is because, unlike a TextView, the Bitmap class is not BiDi aware, so it draws the letters from left to write.
Try as I might, I can't figure out how to draw the text in the correct order.
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Canvas 实际上是 Skia（原生图形引擎）Canvas 的包装。 Skia 不执行任何 BiDi/重塑，它只是绘制字形序列。
另一方面，TextView 使用大量 Android 文本相关对象，其中包括 Layout 和派生类，它们执行简单（实际上是愚蠢的）BiDi。 Android 的 BiDi 非常愚蠢，它甚至无法处理 RTL 中的数字：“180”显示为“081”。
就我个人而言，我不信任 Android 当前的 BiDi，并且会编写自己的 Unicode-BiDi 兼容类并在需要时使用它。我建议你除了手动整形之外还使用手动 BiDi 兄弟。记住：先BiDi，再重塑！
萨拉姆
Canvas is practically a wrapper around the Canvas of Skia (native graphics engine). Skia doesn't perform any BiDi/reshaping, it simply draws sequences of glyphs.
TextView, on the other way, uses a load of Android's text-related objects, among them Layout and derived classes which do simple (actually dumb) BiDi. Android's BiDi is very dumb that it can't even handle digits in RTL: 'طولي 180' is displayed 'طولي 081'.
Personally I don't trust Android's current BiDi, and would write my own Unicode-BiDi compliant class and use it if I need. I suggest you use manual BiDi in addition to the manual reshaping bro. Remember: First BiDi, then reshape!
Salam
如果你给textview添加了单行属性，你应该删除这个属性并添加 maxLines="1"
if you added single line attribute to textview ,you should delete this attribute and add maxLines="1"