将数据从活动传递到片段会导致"ScrollView只能承载一个直接子“错误。
将数据从活动传递到片段会导致"ScrollView只能承载一个直接子“错误。
提问于 2016-10-09 11:03:51
我正在制作一个应用程序使用这教程。我对我的代码做了一些修改(我想从服务器获取数据到我的主要活动，并将它传递给我的片段)。在此之前，当我打开应用程序时，它运行得很好，但现在它崩溃了。--我在问问题之前，尝试过从堆栈溢出 (1、2、3.、4.、5.)中得到很多答案，但没有一个回答我的问题。当我直接从片段中得到餐馆时，它工作得很好，但是传递活动中的数据会导致这个错误。
Main活动(我传递从服务器获取数据并将其传递给片段)：
TabLayout tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_map)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_list)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_my_list)));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
tabLayout.setTabMode(TabLayout.MODE_FIXED);
final ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
RestaurantsFragment restaurantsFragment = new RestaurantsFragment();
Bundle args = new Bundle();
args.putParcelableArrayList("restaurantList", (ArrayList<? extends Parcelable>) restaurantList);
restaurantsFragment.setArguments(args);
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.sliding_tabs, restaurantsFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();餐馆片段(我从我的主要活动中获得数据，调试时从服务器获得餐馆)：
public class RestaurantsFragment extends Fragment {
private static final String TAG = RestaurantsFragment.class.getSimpleName();
// Restaurants json url
private ProgressDialog pDialog;
private ArrayList restaurantList = new ArrayList<>();
private ListView listView;
private CustomListAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_restaurants, container, false);
Bundle bundle = this.getArguments();
if (bundle != null) {
restaurantList = bundle.getParcelableArrayList ("restaurantList");
}
listView = (ListView) view.findViewById(R.id.restaurants_list);
adapter = new CustomListAdapter(getActivity(), restaurantList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading...");
pDialog.show();
return view;
}fragment_restaurants
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".sliderfragments.RestaurantsFragment">
<ListView
android:id="@+id/restaurants_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@color/list_divider"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_row_selector" />
</RelativeLayout>list_row
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/list_row_selector"
android:padding="8dp">
<!-- Thumbnail Image -->
<com.android.volley.toolbox.NetworkImageView
android:id="@+id/thumbnail"
android:background="@drawable/default_profile"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_alignParentLeft="true"
android:layout_marginRight="8dp" />
<!-- User Name -->
<TextView
android:id="@+id/userName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:textSize="@dimen/userName"
android:textStyle="bold" />
<!-- Date -->
<TextView
android:id="@+id/date"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/userName"
android:layout_marginTop="1dip"
android:layout_toRightOf="@+id/thumbnail"
android:textSize="@dimen/date" />
<!-- Time -->
<TextView
android:id="@+id/time"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/date"
android:layout_marginTop="5dp"
android:layout_toRightOf="@+id/thumbnail"
android:textColor="@color/time"
android:textSize="@dimen/time" />
</RelativeLayout>content_main
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context=".MainActivity"
tools:showIn="@layout/app_bar_main">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="scrollable" />
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="@android:color/white" />
</android.support.design.widget.AppBarLayout>
寻呼机适配器：
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
MapsFragment tab1 = new MapsFragment();
return tab1;
case 1:
RestaurantsFragment tab2 = new RestaurantsFragment();
return tab2;
case 2:
MyRestaurantsFragment tab3 = new MyRestaurantsFragment();
return tab3;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}堆栈跟踪：
10-09 12:30:12.755 32374-32374/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.test.kemo.restaurant, PID: 32374
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.kemo.restaurant/com.test.kemo.restaurant.MainActivity}: java.lang.IllegalStateException: HorizontalScrollView can host only one direct child
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: HorizontalScrollView can host only one direct child
at android.widget.HorizontalScrollView.addView(HorizontalScrollView.java:216)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613)
at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1174)
at android.app.Activity.performStart(Activity.java:5347)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2168)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method) 回答 1
Stack Overflow用户
回答已采纳
发布于 2016-10-09 11:49:42
您正在将片段添加到滑动选项卡视图中。你写道：
fragmentTransaction.replace(R.id.sliding_tabs, restaurantsFragment);选项卡布局是水平滚动视图的子级，请参阅文档：https://developer.android.com/reference/android/support/design/widget/TabLayout.html
我不知道您的应用程序是如何工作的，但是您不能在这里将您的片段添加到TabLayout中，因为它为现在允许的应用程序创建了多个子程序(TabLaout实际上是一个水平的scrollView )。
在我提到的fragmentTransaction.replace()方法中，您必须指定要在其中添加片段的容器。从您的代码中可以看出，您使用的是tabLayput作为查看器的标题，而不是替换其中的片段。
在您的主要活动中创建一个位置(容器)，在其中添加您的片段。绝对不是在你的R.id.sliding_tabs,旁边，你的取景器标题。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39942860
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