如何避免“IllegalStateException：Scrollview只能托管一个直接孩子”？

时间：2010-09-17 11:58:46

标签： android scrollview

我在Android版面中使用ScrollView，但显示

IllegalStateException "Scrollview can host only one direct child"

如何避免此异常？

崩溃信息：

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)

7 个答案:

答案 0 :(得分：47)

您添加了多个控件作为ScrollView的子级。如果您想这样做，请添加LinearLayout作为直接子项，并将其他控件放入其中。

答案 1 :(得分：5)

您可以通过仅在滚动视图中托管一个直接子项来避免IllegalStateException :Scollview can host only one direct child

答案 2 :(得分：2)

在ScrollView中，

必须只包含一个布局，否则它包含多个布局或视图，它会出错。

此示例代码解决了您的问题，

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
  <!-- here add your views -->

    </LinearLayout>
</ScrollView>

示例下面的代码错误

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

    </LinearLayout>
</ScrollView>

父布局必须

答案 3 :(得分：1)

我遇到同样异常的问题是我试图向用户显示Snackbar警告，并以视图作为参数来显示它。那个视图在scrollview中，它以某种方式破坏了层次结构。当我切换回Toast时，异常消失了。

答案 4 :(得分：0)

如果您正在使用片段和SlidingPane，请检查您是否在SlidingPane的xml布局中使用标记，然后在运行时替换并在SlidingPane的oncreateView上添加片段。 =]

答案 5 :(得分：0)

您仅需添加一个孩子即可滚动布局。

答案 6 :(得分：0)

当我使用Fragments并将ScrollView作为Fragment的根视图时，这发生在我身上。问题是不小心将Fragment实例化为XML中的<fragment>元素；这是一个错误，因为它实例化了两次，一次是在放大布局XML时实例化，一次是在我的应用代码中。将<fragment>更改为<FrameLayout>后，此问题已修复。

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