`Anko` 给出异常 AnkoException: Id is not set

Question

我正在尝试学习 Anko 的布局设计。我已经使用 Anko 设置了布局，如下所示

relativeLayout {
        val counterTextView = textView {
            text = "0"
            textSize = 24f

        }
        button {
            onClick {
                count++
                counterTextView.text = count.toString()
            }
        }.lparams {
            below(counterTextView)
        }
    }

我只需要一个带有 TextView 和 TextView 下方按钮的相对布局。

以上代码报错如下

     Caused by: org.jetbrains.anko.AnkoException: Id is not set for android.widget.TextView{d8dedcd V.ED..... ......ID 0,0-0,0}
    at org.jetbrains.anko.RelativeLayoutLayoutParamsHelpersKt.below(RelativeLayoutLayoutParamsHelpers.kt:60)
    at com.example.app.MainActivity.onCreate(MainActivity.kt:29)
    at android.app.Activity.performCreate(Activity.java:6237)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)

有人知道怎么解决吗？

Answer 1

我想如果你想使用 relativeLayout 参数，你必须为视图创建 id，所以试试这个

relativeLayout {
    val counterTextView = textView {
        id = R.id.counterTextView // add this line
        text = "0"
        textSize = 24f

    }
    button {
        onClick {
            count++
            counterTextView.text = count.toString()
        }
    }.lparams {
        below(counterTextView)
    }
}

并且您必须在值文件夹

中创建 ids.xml

ids.xml

<resources>
    <item name="counterTextView" format="integer" type="id"/>
</resources>

`Anko` 给出异常 AnkoException: Id is not set

`Anko` gives exception AnkoException: Id is not set

android

kotlin

anko