Question

        val receiptDetails = headerView.findViewById(R.id.tb_receipt_details) as TextView
        val paymentDetails = headerView.findViewById(R.id.tb_payment_details) as TextView
        val invoiceDetails = headerView.findViewById(R.id.tb_invoice_details) as TextView
        val summary = headerView.findViewById(R.id.tb_summary) as TextView

        tabLayout!!.getTabAt(0)!!.setCustomView(receiptDetails)
        tabLayout!!.getTabAt(1)!!.setCustomView(paymentDetails)
        tabLayout!!.getTabAt(2)!!.setCustomView(invoiceDetails)
        tabLayout!!.getTabAt(3)!!.setCustomView(summary)

        tabLayout!!.getChildAt(1).setEnabled(false)

在调用 tabLayout !!。getChildAt（1）.setEnabled（false）时，出现了空指针异常。如何禁用Kotlin中的特定标签。预先感谢。

logcat

12-03 10:03:27.536 7899-7899/com.salesrep.auxxa.alliontechnologies.auxxasr E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.salesrep.auxxa.alliontechnologies.auxxasr, PID: 7899
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.salesrep.auxxa.alliontechnologies.auxxasr/com.salesrep.auxxa.alliontechnologies.auxxasr.NewPaymentActivity}: kotlin.KotlinNullPointerException
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
    at android.app.ActivityThread.access$800(ActivityThread.java:144)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5221)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: kotlin.KotlinNullPointerException
    at com.salesrep.auxxa.alliontechnologies.auxxasr.NewPaymentActivity.onCreate(NewPaymentActivity.kt:84)
    at android.app.Activity.performCreate(Activity.java:5937)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)

Answer 1

由于您使用的是自定义视图，因此可以通过使用touch事件来禁用该标签：

val view = tabLayout.getTabAt(1)!!.customView.parent as View;
view.setOnTouchListener { v, event -> true }

Answer 2

使用此：

(tabLayout!!.getChildAt(0) as ViewGroup).getChildAt(1).setEnabled(false)

tabLayout!!.getChildAt(0) as ViewGroup是包含子视图的ViewGroup。

Answer 3

宣布活动

var touchableList: ArrayList<View>? = ArrayList()

禁用所有标签

touchableList = tabLayout?.touchables
touchableList?.forEach { it.isEnabled = false }

启用标签

touchableList?.get(0)?.isEnabled = true

Answer 4

更改

tabLayout !!。getChildAt（1）.setEnabled（false）

收件人

tabLayout !!。getChildAt（1）.isEnabled = false

活动未在清单中注册。注册。

如何在Kotlin中禁用标签页？

4 个答案: