用于sqlite测试应用的4个不同的随机数？

Question

我想要指定范围内的四个不同的数字，但我得到一些数字和某个日期。

该应用对于这些选择

Random rn = new Random(); 
int rangetp = maximumb - minimumb + 1; 
randomNums = rn.nextInt(rangetp) + minimumb; 

Random rn1 = new Random(); 
int rangetp1 = maximumb - minimumb + 1; 
randomNums1 = rn1.nextInt(rangetp1) + minimumb; 

Random rn2 = new Random(); 
int rangetp2 = maximumb - minimumb + 1; 
randomNums2= rn2.nextInt(rangetp2) + minimumb; 

Random rn3 = new Random(); 
int rangetp3 = maximumb - minimumb + 1; 
randomNums3 = rn3.nextInt(rangetp3) + minimumb; 

SQLiteDatabase db = veridepo.getReadableDatabase(); 
cursor = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums + "" + sorsunmu + "", null); 

cursor1 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums1 + "" + sorsunmu + "", null); 

cursor2 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums2 + "" + sorsunmu + "", null); 

cursor3 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums3 + "" + sorsunmu + "", null); 

Answer 1

你只需要一个随机对象不是4测试应用程序！

Random rn = new Random(); 
int rangetp = maximumb - minimumb + 1; 
randomNums = rn.nextInt(rangetp) + minimumb; 

int rangetp1 = maximumb - minimumb + 1; 
randomNums1 = rn.nextInt(rangetp1) + minimumb; 

int rangetp2 = maximumb - minimumb + 1; 
randomNums2= rn.nextInt(rangetp2) + minimumb; 

int rangetp3 = maximumb - minimumb + 1; 
randomNums3 = rn.nextInt(rangetp3) + minimumb; 

读取文档中关于随机： https://developer.android.com/reference/java/util/Random.html

这个java的“问题”有关randoming号码及如何实现得到一个随机数更随机的方式。