Android之Canvas DrawText

Android之Canvas DrawText String str = "Hello"; int len = str.getBytes（）.length;
int w = len * 16;
int h = 32;
Bitmap strBitmap = Bitmap.createBitmap（w, h, Bitmap.Config.RGB_565）;
Canvas c = new Canvas（strBitmap）;
Paint paint = new Paint（Paint.ANTI_ALIAS_FLAG）;
paint.setTextSize（35）;
Typeface tf = Typeface.createFromAsset（getAssets（）, "caiyun"）;
paint.setTypeface（tf）;
paint.setColor（0xFFFFFFFF）;
paint.setTextAlign（Align.LEFT）; FontMetrics fm = paint.getFontMetrics（）;
c.drawText（str, 0, h + fm.top - fm.ascent, paint）;
c.save（）;其中 c.drawText（str, 0, h + fm.top - fm.ascent, paint）;是在指定位置开始输出文字，而其中“h + fm.top - fm.ascent”就是这里面的关键，h相当与一个参照（我这里是要把文字写到一个bitmap上，所以h就是bitmap的基准），fm.top - fm.ascent是开始输出文字的baseline,不太明白的请看 Canvas.drawText的说明：Draw the text, with origin at （x,y）, using the specified paint. The origin is interpreted based on the Align setting in the paint. Parameters:text The text to be drawnx The x-coordinate of the origin of the text being drawny The y-coordinate of the origin of the text being drawnpaint The paint used for the text （e.g. color, size, style）这个origin就是文字baseline基线的坐标。另外关于Typeface，比较遗憾是不太明白如何设置其他中文字体，比如宋体，楷体之类的，Typeface.createFromAsset（getAssets（）, "caiyun"）;更多Android相关信息见Android 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=11