用paint 计算字符串的像素宽度

1.只得到字符宽度

//直接返回参数字符串所占用的像素宽度

Paint paint = new Paint();
width = paint.measureText(str);

有一些view可以直接得到paint,如textview,

    TextPaint paint = noticeView.getPaint();
    String text = ""+noticeView.getText();
    int w = (int) paint.measureText(text); 

 

2.得到字符矩形区域大小

Paint paint = new Paint(); 
Rect rect = new Rect();

//返回包围整个字符串的最小的一个Rect区域
paint.getTextBounds(str, 0, 1, rect); 

strwid = rect.width();
strhei = rect.height();