ArrayIndexOutOfBoundsException：长度=5；指数=5

Question

原因：java.lang.ArrayIndexOutOfBoundsException:length=5；在com.example.android.architecture.mainactivity.updateDisplay(mainactivity.kt:59)在com.example.android.architecture.mainactivity.oncreate(mainactivity.kt:44)

更改索引和类视图

class MainActivity : AppCompatActivity() {

    private lateinit var dice: IntArray
    private lateinit var headlineText: String

    private val imageViews by lazy {
        arrayOf<ImageView>(findViewById(R.id.die1),
        findViewById(R.id.die1),
        findViewById(R.id.die2),
        findViewById(R.id.die3),
        findViewById(R.id.die4),
            findViewById(R.id.die5)
        )
    }
        private val headline by lazy { findViewById<TextView>(R.id.headline) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)

        headlineText = savedInstanceState?.getString(HEADLINE_TEXT)
            ?: getString(R.string.welcome)
        dice = savedInstanceState?.getIntArray(DICE_COLLECTION)
            ?: intArrayOf(6,6,6,6,6)

        lifecycle.addObserver(MyLifeCycleObserver())

        fab.setOnClickListener{
            fabClickHandler()}

        updateDisplay()

    }


    private fun fabClickHandler(){
        dice = DiceHelper.rollDice()
        headlineText = DiceHelper.evaluateDice(this,dice)
        updateDisplay()

    }

    private fun updateDisplay() {
        for (i in 0 until imageViews.size) {

            val drawableId = when (dice[i]) {
                1 -> R.drawable.die_1
                2 -> R.drawable.die_2
                3 -> R.drawable.die_3
                4 -> R.drawable.die_4
                5 -> R.drawable.die_5
                6 -> R.drawable.die_6
                else -> R.drawable.die_6
            }
            imageViews[i].setImageResource(drawableId)
        }
        headline.text = headlineText
    }

    override fun onSaveInstanceState(outState: Bundle?) {
        outState?.putString(HEADLINE_TEXT,headlineText)
        outState?.putIntArray(DICE_COLLECTION,dice)
        super.onSaveInstanceState(outState)
    }
}

我不知道为什么我的android应用程序没有运行

Answer 1

dice的大小为5，其中ImageViews有6个元素，因此循环运行6次，在第六次迭代中出现异常