Question

我想制作一个这样的程序：

我尝试了很多东西，但是不知道在if / when语句的括号里放什么。

var y = getResources（）。getIdentifier（“ menu”，“ drawable”，getPackageName（））

    var y1 = getResources().getIdentifier("door1", "drawable", getPackageName())
    var y2 = getResources().getIdentifier("door_inside", "drawable", getPackageName())
    var y3 = getResources().getIdentifier("door_back", "drawable", getPackageName())
    buttonYes.setOnClickListener {
        when (y) {
        y -> imageView.setImageResource(R.drawable.door1)
        }
        if (y1 = true) {
        imageView.setImageResource(R.drawable.door_inside)
        }
        /*
        when (y2) {
            y2 -> imageView.setImageResource(R.drawable.door_inside2)
        }
        when (y3) {
            y3 -> imageView.setImageResource(R.drawable.door_back2)
        }

         */
    }

    var n = getResources().getIdentifier("menu", "drawable", getPackageName())
    var n1 = getResources().getIdentifier("door1", "drawable", getPackageName())
    var n2 = getResources().getIdentifier("door_back", "drawable", getPackageName())
    var n3 = getResources().getIdentifier("door_inside", "drawable", getPackageName())
    buttonNo.setOnClickListener {
            if (imageView.resources = n) {
            finishAffinity();
            }
            if (drawable=n1) {
               imageView.setImageResource(R.drawable.door_back)
            }
        /*
            when(n2) {
                n2 -> imageView.setImageResource(R.drawable.door_back2_1)
            }
            when(n3) {
                n3 -> imageView.setImageResource(R.drawable.door_inside2_1)
            }

         */
        }
}

}

Answer 1

您是否正在寻找类似的东西？

string buttonSequense ="";

buttonYes.setOnClickListener {
  buttonSequense +="yes";
  setImage();
}
buttonNo.setOnClickListener {
  buttonSequense +="no";
  setImage();
}

然后使用setImage方法：

public void setImage(){
  if(buttonSequense.equals("yes")){
    imageView.setImageResource(R.drawable.door_inside)
  }else if(buttonSequense.equals("yesno")){
    imageView.setImageResource(R.drawable.door_back)
  }else if(buttonSequense.equals("yesnonoyesno"))
  //... and so on
}

Answer 2

似乎可以绘制可绘制对象的地图并使用它。

import your.package.name.R.drawable.*
//...

data class Choice(val choice1: Int, val choice2: Int)

val choicesMap = mapOf(
     door1 to Choice(door_inside, door_back),
     door_inside to Choice(door_further_inside, door1),
     //etc.
 )

然后在应用它时存储当前Drawable并使用它进行选择。

var currentImageDrawable = R.drawable.door1

//...

buttonYes.setOnClickListener {
  currentImageDrawable = choicesMap[currentImageDrawable].choice1
  imageView.setImageResource(currentImageDrawable)
}
buttonNo.setOnClickListener {
  currentImageDrawable = choicesMap[currentImageDrawable].choice2
  imageView.setImageResource(currentImageDrawable)
}

有没有一种方法可以使用if / when语句更改imageView资源

2 个答案: