Android生成随机数

此方法通过把当前时刻长整型数传给Random对象，让它产生的值随着时间而变化。

String s = "";  
Random ran =new Random(System.currentTimeMillis());  
for (int i = 0; i < 10; i++) {  
s =s + "
" + ran.nextInt(100);  
}  
Toast.makeText(UiTestActivity.this,"Random: 
" + s, Toast.LENGTH_LONG).show();