android使用rand编号作为活动名称的一部分

Question

我有3个活动，例如activity_1，activity_2，activity_3。我可以生成1到3之间的随机数。

如何使用此随机数打开相关活动？

Answer 1

使用if else条件

实现这一目标

//Initialize  globally
Random ran = new Random();

int randomNum = ran.nextInt(4 - 1) + 1;
//This gives a random integer between 1 (inclusive) and 4 (exclusive), one of 1,2 and 3.

 if(randomNum == 1) {
       Intent i = new Intent(getApplicationContext(), ActivityOne.class);  
       startActivity(i);  
   }else if(randomNum == 2) {
       Intent i = new Intent(getApplicationContext(), ActivityTwo.class);  
       startActivity(i);  
  }