How to disable tabs in Kotlin?

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)

Here I got a null pointer exception when I called tabLayout!!.getChildAt(1).setEnabled(false). How can I disable specific tab in Kotlin. Thanks in advance.

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)

Possibly duplicate question please check out this link https://stackoverflow.com/questions/31702725/disable-tablayout — aslamhossin, Dec 03 '18 at 10:44

Aaron · Accepted Answer · 2018-12-03T10:44:37.540

1

Since you're using custom view, you could disable the tab by consuming the touch event:

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

edited Dec 03 '18 at 10:44

answered Dec 03 '18 at 10:21

Aaron

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Hi, isEnabled not support to tabLayout.getTabAt(1) – Rajitha Perera Dec 03 '18 at 10:22
@RajithaPerera My apologies, misread your question. I think you could disable the tab by returning true on touch listener, or maybe you could also try `isEnabled = false` on the parent view. – Aaron Dec 03 '18 at 10:31
One question? How I enable this tab once I need ? – Rajitha Perera Dec 03 '18 at 10:57
1

Try `view.setOnTouchListener(null)` or `view.setOnTouchListener { v, event -> false }` to re-enable it. – Aaron Dec 03 '18 at 10:58
Thank you Thank you for saving my day – Rajitha Perera Dec 03 '18 at 11:03

score 0 · Answer 2 · answered Dec 03 '18 at 10:39

0

Use this:

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

tabLayout!!.getChildAt(0) as ViewGroup is the ViewGroup containing the children views.

answered Dec 03 '18 at 10:39

forpas

160,666
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score 0 · Answer 3 · answered Mar 28 '19 at 12:30

0

declare the activity

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

disable all tab

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

Enable the tab

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

answered Mar 28 '19 at 12:30

Arul Pandian

1,685
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score -2 · Answer 4 · answered Dec 03 '18 at 10:18

-2

change From

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

To

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

And Activity not register in manifest. register it.

answered Dec 03 '18 at 10:18

Parth Suthar

123
4

How to disable tabs in Kotlin?

4 Answers4