二进制XML文件行#20:inflating类片段Android时出错

Question

我想在tablet视图中显示列表+描述。下面的代码在纵向模式下运行良好，但在横向模式下停止运行。有什么不对劲吗？

主要活动

    import android.os.Bundle;
    import android.app.Activity;
    import android.app.Fragment;
    import android.app.FragmentTransaction;
    import android.app.ListFragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.ListAdapter;

    public class MainActivity extends Activity {

        // if run on phone, isSinglePane = true
        // if run on tablet, isSinglePane = false
        boolean isSinglePane;

        static String[] month ={
                "January", "February", "March", "April",
                "May", "June", "July", "August",
                "September", "October", "November", "December"};

        public static class MyListFragment extends ListFragment {

            @Override
            public void onActivityCreated(Bundle savedInstanceState) {
                // TODO Auto-generated method stub
                super.onActivityCreated(savedInstanceState);

                ListAdapter myArrayAdapter =
                        new ArrayAdapter<String>(
                                getActivity(), android.R.layout.simple_list_item_1, month);
                setListAdapter(myArrayAdapter);

            }

        }

        public static class MyDetailFragment extends Fragment {

            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                     Bundle savedInstanceState) {
                // TODO Auto-generated method stub
                View view = inflater.inflate(R.layout.layout_detailfragment, null);
                return view;
            }

        }

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            View v = findViewById(R.id.phone_container);
            if(v == null){
                //it's run on tablet
                isSinglePane = false;
       /*
        * MyListFragment and MyDetailFragment have been loaded in XML,
        * no need load.
        */

            }else{
                //it's run on phone
                //Load MyListFragment programmatically
                isSinglePane = true;

                if(savedInstanceState == null){
                    //if's the first time created
                    MyListFragment myListFragment = new MyListFragment();
                    FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
                    fragmentTransaction.add(R.id.phone_container, myListFragment);
                    fragmentTransaction.commit();
                }
            }
        }
    }

布局/ActivityMain.xml

    <?xml version="1.0" encoding="utf-8"?>
    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <fragment
            android:id="@+id/titles"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
             />

    </FrameLayout>

res/layout-land/activitymain.xml

    <LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Normal" />

    <FrameLayout
        android:id="@+id/phone_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </FrameLayout>

</LinearLayout>

LayoutDetailFragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical">

    <TextView
        android:id="@+id/title_detailfragment"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Detail Fragment"/>

</LinearLayout>

错误

E/AndroidRuntime：致命异常：主进程:com.example.fyp_awais.tab，PID:3974 java.lang.RuntimeException：无法启动activity组件信息{com.example.fyp_awais.tab/com.example.fyp_awais.tab.MainActivity}：Android.view.inflateException：二进制XML文件行#20:在Android.app.activityThread.PerformLaunchActivity（ActivityThread.java:2325)在Android.app.activityThread.Access$800（ActivityThread.java:2325)Java：698）原因：Android.View.Inflater.Exception：二进制XML文件行#20:在Android.View.LayoutInflater.CreateViewFromTag（LayoutInflater.Java:763)在Android.View.LayoutInflater.rInflate(LayoutInflater.Java:806)在Android.View.LayoutInflater.rInflate(LayoutInflater.Java:809)在Ad.java:2387)Android.app.ActivityThread.Access $800（ActivityThread.java:151)Android.app.ActivityThread $H.HandleMessage（ActivityThread.java:1303) Android.os.Handler.DispatchMessage（ActivityThread.java:102) Android.os.Looper.Loop（ActivityThread.java:135) Android.app.ActivityThread.Main（ActivityThread.java:5254) java.lang.Reflect.Method.Invoke（原生VA:582)在Android.app.FragmentManager.java:2108)在Android.app.activity.onCreateView（activity.java:5328)在Android.view.LayoutInflater.CreateViewFromTag（LayoutInflater.java:733)在Android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 在Android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 在y（ActivityThread.java:2278) 在android.app.activityThread.HandleLaunchActivity（activityThread.java:2387) 在android.app.activityThread.access$800（activityThread.java:151) 在Android.app.ActivityThread$H.HandleMessage（ActivityThread.java:1303) 在android.os.handler.dispatchmessage(handler.java:102) 在android.os.looper.loop(looper.java:135) 在android.app.activityThread.main（activityThread.java:5254) 在java.lang.Reflect.Method.Invoke（原生方法） 在java.lang.Reflect.Method.Invoke(method.java:372) 在com.android.internal.os.zygoteInit$methodandargscaller.run（zygoteInit.java:903) 在com.android.internal.os.zygoteinit.main（zygoteinit.java:698) 应用程序已终止。

Answer 1

你确定你在横向模式中有错误吗？因为在Landage，its运行精细，而在肖像模式下，您没有使用动态片段，所以您需要扩展片段的activity，而不是activity来运行片段。如果您使用动态片段而不是硬编码，这将是很好的。

将layout-port/main_activity更改为

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout  xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:id="@+id/phone_container2"
    >

  // remove hard coded fragment

</FrameLayout>

//您的完整解决方案

主activity

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;

public class MainActivity extends Activity {

    // if run on phone, isSinglePane = true
    // if run on tablet, isSinglePane = false
    boolean isSinglePane;

    static String[] month ={
            "January", "February", "March", "April",
            "May", "June", "July", "August",
            "September", "October", "November", "December"};

    public static class MyListFragment extends ListFragment {

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onActivityCreated(savedInstanceState);

            ListAdapter myArrayAdapter =
                    new ArrayAdapter<String>(
                            getActivity(), android.R.layout.simple_list_item_1, month);
            setListAdapter(myArrayAdapter);

        }

    }

    public static class MyDetailFragment extends Fragment {

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            View view = inflater.inflate(R.layout.layout_detailfragment, null);
            return view;
        }

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        View v = findViewById(R.id.phone_container);
        if(v == null){
            //it's run on tablet
            isSinglePane = false;

            //if's the first time created
            MyDetailFragment myListFragment = new MyDetailFragment();
            FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
            fragmentTransaction.add(R.id.phone_container2, myListFragment);
            fragmentTransaction.commit();



       /*
        * MyListFragment and MyDetailFragment have been loaded in XML,
        * no need load.
        */

        }else{
            //it's run on phone
            //Load MyListFragment programmatically
            isSinglePane = true;


                //if's the first time created
                MyListFragment myListFragment = new MyListFragment();
                FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
                fragmentTransaction.add(R.id.phone_container, myListFragment);
                fragmentTransaction.commit();

        }
    }
}

端口：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:id="@+id/phone_container2"
    >

  <!--  <fragment
        android:id="@+id/titles"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />-->

</FrameLayout>

土地：

<LinearLayout 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"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              android:orientation="vertical"
              tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Normal" />

    <FrameLayout
        android:id="@+id/phone_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </FrameLayout>

</LinearLayout>