How can I avoid "IllegalStateException: Scrollview can host only one direct child"?

Question

I am using ScrollView in my Android Layout but it shows

IllegalStateException "Scrollview can host only one direct child"

How can I avoid this exception?

Crash info:

07-19 15:58:22.308 21372 21372 D AndroidRuntime: Shutting down VM 07-19 15:58:22.313 21372 21372 E AndroidRuntime: FATAL EXCEPTION: main 07-19 15:58:22.313 21372 21372 E AndroidRuntime: Process: com.languoguang.helloworld, PID: 21372 07-19 15:58:22.313 21372 21372 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.languoguang.helloworld/com.languoguang.helloworld.plugin_homeadd.activity.AddDeviceWifiSettingActivity}: android.view.InflateException: Binary XML file line #254: ScrollView can host only one direct child 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3190) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3285) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.-wrap12(Unknown Source:0) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1887) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:108) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:166) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:7412) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:926) 07-19 15:58:22.313 21372 21372 E AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #254: ScrollView can host only one direct child 07-19 15:58:22.313 21372 21372 E AndroidRuntime: Caused by: java.lang.IllegalStateException: ScrollView can host only one direct child 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.widget.ScrollView.addView(ScrollView.java:292) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflate(LayoutInflater.java:878) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:835) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflate(LayoutInflater.java:877) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:835) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflate(LayoutInflater.java:877) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:835) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.inflate(LayoutInflater.java:515) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:477) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.policy.HwPhoneWindow.setContentView(HwPhoneWindow.java:313) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.Activity.setContentView(Activity.java:2843) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.languoguang.helloworld.plugin_homeadd.activity.AddDeviceWifiSettingActivity.onCreate(AddDeviceWifiSettingActivity.java:82) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:7358) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1218) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3143) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3285) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.-wrap12(Unknown Source:0) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1887) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:108) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:166) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:7412) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245) 07-19 15:58:22.313 21372 21372 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:926) 

Answer 1

You have added more than one controls as children of a ScrollView. If you want to do this add a LinearLayout as a direct child and put the other controls in it.