Android 计算字符串在屏幕上所占的长度和宽度(像素单位)

 获取字符串占的屏幕的宽度：

<span style="font-size:24px;">Paint mPaint = new Paint();
int width = mPaint.measureText(hello);  //在屏幕中所占的宽度</span>

计算出当前绘制出来的字符串有多宽，可以这么来！
方法1：

<span style="font-size:24px;">Paint pFont = new Paint();
Rect rect = new Rect();

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

strwid = rect.width();
strhei = rect.height();</span>

方法2：

Rect bounds = new Rect();
String text = "Hello World";
TextPaint paint;

paint = findViewById(R.id.hello_world).getPaint();
paint.getTextBounds(text, 0, text.length(), bounds);
int width = bounds.width();

方法3：

Paint pFont = new Paint();
Rect rect = new Rect();
pFont.getTextBounds("豆", 0, 1, rect);
Log.v(TAG, "height:"+rect.height()+"width:"+rect.width());