Question

我遇到了这个问题：

android.view.InflateException：二进制XML文件行＃31：错误膨胀类片段片段com.myapp.mgm.QueryFragment没有创建视图。

此问题仅在平板电脑模式下发生。如果应用程序在手机上运行，则可以正常运行。

我有这个layout-large xml文件（fragments.xml）：

<android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/lightgrey">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="horizontal"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@color/lightgrey"
              android:baselineAligned="false">

    <fragment
            android:name="com.myapp.mgm.QueryFragment"
            android:id="@+id/fragment1"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            tools:layout="@layout/nu"/>

    <fragment
            android:name="com.myapp.mgm.Infodata"
            android:id="@+id/fragment2"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            tools:layout="@layout/maindata"/>

</LinearLayout>
        <ListView
                android:id="@+id/list_slidermenu"
                android:layout_width="240dp"
                android:layout_height="match_parent"
                android:layout_gravity="start"
                android:choiceMode="singleChoice"
                android:divider="@color/orange"
                android:dividerHeight="1dp"
                android:listSelector="@drawable/menulist_selector"
                android:background="@color/lblack"/>
</android.support.v4.widget.DrawerLayout>

正如您所看到的，我的布局上有两个片段和一个导航抽屉。

将所有这些放在一起的类是：

public class Fragments extends ActionBarActivity implements QueryFragment.OnQuerySelectedListener {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragments);

        slidingMenu();

        if (findViewById(R.id.fragmentsboth) != null) {
            if (savedInstanceState != null) {
                return;
            }
            QueryFragment firstFragment = new QueryFragment();
            getSupportFragmentManager().beginTransaction().add(R.id.fragmentsboth, firstFragment).commit();
        }
    }
}

我的QueryFragment课就是这样：

public class QueryFragment extends ListFragment {
    public interface OnQuerySelectedListener {
        public void onItemSelected(Bundle itemSelectedData);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        operation = Fragments.operation;
        if (operation == 0) {
            layoutToShow = inflater.inflate(R.layout.querylist, container, false);
            ...
        } else if (operation == 1) {
            layoutToShow = inflater.inflate(R.layout.querylist, container, false);
            ...
        } else if (operation == 2) {
            layoutToShow = inflater.inflate(R.layout.search, container, false);
            ...
        } else if (operation == 3) {
            layoutToShow = inflater.inflate(R.layout.nu, container, false);
            ...
        }
        return layoutToShow;
    }

}

我的InfoData课就是这个东西：

public class Infodata extends Fragment implements OnSeekBarChangeListener, OnItemSelectedListener {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        setHasOptionsMenu(true);

        View itemDataLayout = inflater.inflate(R.layout.maindata, container, false);
        ....

        if (savedInstanceState != null && savedInstanceState.size()>=2) {
            layoutType = savedInstanceState.getInt("layout");
            comesFromSavedState = true;
            itemData = savedInstanceState;
        }
        return itemDataLayout;
    }

    @Override
    public void onStart() {
        super.onStart();

        Bundle args = getArguments();
        if (args != null) {
            populateLayoutWithData(1, args);
        } else if(comesFromSavedState){
            populateLayoutWithData(2, itemData);
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        //Saves stuff (data) in a bundle to restore after screen rotation
    }   
}

基本上我在左边的片段（listview）上有一个QueryFragment，在用户选择其中一个项目（带有数据的光标）之后，右边的片段（InfoData）是填充了此游标的提取数据。如果我从左侧片段中选择一个intem并且它的数据填充在右侧片段上，因为我在onSaveInstanceState上保存数据，如果我旋转屏幕，一切正常，即数据重新加载正确的片段。

现在，我的Navigadion Drawer为4个选项。这些选项中的每一个都在左侧片段上加载listView，然后，如前所述，如果用户选择其中一个项目，则将其数据加载到右侧片段上。

以下是我Fragments课程中处理此问题的代码：

private void selectItem(int position) {
    int typeOfLayout;
    mDrawerList.setItemChecked(position, true);
    mDrawerLayout.closeDrawer(mDrawerList);
    QueryFragment newFragment;
    FragmentTransaction transaction;

    ViewGroup parentView = (ViewGroup) findViewById(R.id.fragmentsboth);

    if (parentView != null) {
        typeOfLayout = R.id.fragmentsboth;
    } else {
        typeOfLayout = R.id.fragment1;
    }

    switch (position) {
        case 0:
            Intent i = new Intent(this, NutriData.class);
            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(i);
            finish();
            break;
        case 1:
            newFragment = new QueryFragment();
            operation = 0;
            transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(typeOfLayout, newFragment).commit();
            break;
        case 2:
            newFragment = new QueryFragment();
            operation = 1;
            transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(typeOfLayout, newFragment).commit();
            break;
        case 3:
            newFragment = new QueryFragment();
            operation = 2;
            transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(typeOfLayout, newFragment).commit();
            break;
        case 4:
            newFragment = new QueryFragment();
            operation = 3;
            transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(typeOfLayout, newFragment).commit();
            break;
    }
}

想象一下这句话：

我在左侧片段中找到了带有项目的listView，然后选择其中一项。然后，它的数据被传递到正确的片段，将它放在正确的位置。如果我旋转屏幕，则会保存数据并在右侧片段上重新加载旋转后。现在，我打开导航抽屉并选择其中一个选项（1,2,3或4），并在左侧片段中加载相应的listView。右侧片段始终显示用户选择的第一个项目的数据。现在，我按下左侧片段上的新项目，并将其数据加载到右侧片段上。甜。它正如我想的那样工作。问题是如果我现在旋转我的屏幕。我收到了这个错误：

01-01 15:51:16.356    2569-2569/com.myapp.mgm E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.mgm/com.myapp.mgm.Fragments}: android.view.InflateException: Binary XML file line #31: Error inflating class fragment
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
            at android.app.ActivityThread.access$700(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5103)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.view.InflateException: Binary XML file line #31: Error inflating class fragment
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
            at android.app.Activity.setContentView(Activity.java:1895)
            at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:208)
            at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:111)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
            at com.myapp.mgm.Fragments.onCreate(Fragments.java:27)
            at android.app.Activity.performCreate(Activity.java:5133)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
            at android.app.ActivityThread.access$700(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5103)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.IllegalStateException: Fragment com.myapp.mgm.QueryFragment did not create a view.
            at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:308)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
            at android.app.Activity.setContentView(Activity.java:1895)
            at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:208)
            at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:111)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
            at com.myapp.mgm.Fragments.onCreate(Fragments.java:27)
            at android.app.Activity.performCreate(Activity.java:5133)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
            at android.app.ActivityThread.access$700(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5103)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)

有人可以解释一下我做错了吗？

Answer 1

尝试删除

xmlns:android="http://schemas.android.com/apk/res/android

来自LinearLayout。

Answer 2

您可以尝试将布局作为片段的容器放置，该容器将被新片段替换。而不是直接在QueryFragment中嵌入fragments.xml。

1）fragments.xml：

<!-- change fragment1 to a layout -->
<FrameLayout
    android:id="@+id/fragment1_container"
    .../>

2）碎片onCreate（）：

setContentView(R.layout.fragments);

// add QueryFragment to the container layout
getSupportFragmentManager()
    .beginTransaction()
    .add(R.id.fragment1_container, new QueryFragment())
    .commit();

3）片段selectItem（）：

if (parentView != null) {
    typeOfLayout = R.id.fragmentsboth;
} else {
    // change to the container layout id
    typeOfLayout = R.id.fragment1_container;
}

Error inflating class fragment | fragment did not create a view

Answer 3

Android中常见的挑战是可能频繁破坏和重建活动。发生这种情况的最常见时间是用户在横向和纵向方向之间旋转设备。这种崩溃通常会发生，因为设备方向更改会导致Android框架在任何包含的视图中拆除显示的Activity，然后完全重建Activity / View层次结构。对活动或视图的任何引用都会突然变为无效。

注意：此问题可以通过包含： -

来解决

android:configChanges="orientation" android属性在android清单中的所有活动中。这可以防止由方向变化引起的拆卸/重建过程

此外，在Fragment的构造函数中不要忘记这样做

public MyFragment()
    {
        setRetainInstance(true);
    }

使用值为true调用setRetainInstance()会导致Android在活动的拆除/重建周期中保留片段。与片段或视图中包含的视图或其他对象引用一起保留。

将此设置为true，Android： -

保留对Fragment实例的引用
删除旧活动实例
创建新的Activity实例
将保留的Fragment实例附加到新活动实例

在尝试了所有这些疯狂的解决方案之后，这给了我很多，这是唯一有效的解决方案。

膨胀类片段错误|片段没有创建视图

3 个答案: