片段 - 膨胀错误

Question

我的代码有一些问题。我不断收到这些错误。我尝试搜索谷歌并查看了几种可能的解决方案，但都没有奏效。我整天都在处理这个问题，在解决之前无法真正使用我的应用程序。感谢您的帮助。

>     02-22 19:11:14.110: E/AndroidRuntime(2075): FATAL EXCEPTION: main
>     02-22 19:11:14.110: E/AndroidRuntime(2075): java.lang.RuntimeException: Unable to start activity
> ComponentInfo{com.example.slidingmenu/com.example.slidingmenu.MainActivity}:
> android.view.InflateException: Binary XML file line #2: Error
> inflating class fragment
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread.access$600(ActivityThread.java:141)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.os.Handler.dispatchMessage(Handler.java:99)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.os.Looper.loop(Looper.java:137)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread.main(ActivityThread.java:5103)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at java.lang.reflect.Method.invokeNative(Native Method)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at java.lang.reflect.Method.invoke(Method.java:525)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at dalvik.system.NativeStart.main(Native Method)
>     02-22 19:11:14.110: E/AndroidRuntime(2075): Caused by: android.view.InflateException: Binary XML file line #2: Error
> inflating class fragment
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.example.slidingmenu.HomeFragment.onCreateView(HomeFragment.java:16)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Fragment.performCreateView(Fragment.java:1695)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Activity.onCreateView(Activity.java:4765)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.example.slidingmenu.HomeFragment.onCreateView(HomeFragment.java:16)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Fragment.performCreateView(Fragment.java:1695)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.BackStackRecord.run(BackStackRecord.java:682)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Activity.performStart(Activity.java:5142)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   ... 11 more
>     02-22 19:11:14.110: E/AndroidRuntime(2075): Caused by: java.lang.IllegalArgumentException: Binary XML file line #2: Duplicate
> id 0x7f0a0006, tag null, or parent id 0x7f0a0001 with another fragment
> for null
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Activity.onCreateView(Activity.java:4751)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   ... 29 more

这是我的代码：

package com.example.slidingmenu;

import java.util.ArrayList;

import model.NavDrawerItem;

import adapter.NavDrawerListAdapter;
import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.app.Fragment;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

public class MainActivity extends Activity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;

    private CharSequence mDrawerTitle;
    private CharSequence mTitle;

    private String[] navMenuTitles;
    private TypedArray navMenuIcons;

    private ArrayList<NavDrawerItem> navDrawerItems;
    private NavDrawerListAdapter adapter;

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

        mTitle = mDrawerTitle = getTitle();

        navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
        navMenuIcons = getResources().obtainTypedArray(R.array.nav_drawer_icons);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

        navDrawerItems = new ArrayList<NavDrawerItem>();

        navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1), true, "22"));

        navMenuIcons.recycle();

        adapter = new NavDrawerListAdapter(getApplicationContext(), navDrawerItems);
        mDrawerList.setAdapter(adapter);

        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, 
                R.drawable.ic_drawer, R.string.app_name, R.string.app_name){
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(mTitle);
                invalidateOptionsMenu();
            }

            public void onDrawerOpened(View view) {
                getActionBar().setTitle(mDrawerTitle);
                invalidateOptionsMenu();
            }
        };

        mDrawerLayout.setDrawerListener(mDrawerToggle);
        SlideMenuClickListener s = new SlideMenuClickListener();
        if(savedInstanceState == null) {
            s.displayView(0);
        }
        mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if(mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }

        switch (item.getItemId()) {
        case R.id.action_settings:
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
        menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getActionBar().setTitle(title);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    private class SlideMenuClickListener implements ListView.OnItemClickListener {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {
            displayView(position);
        }

        private void displayView(int position) {
            Fragment fragment = null;
            switch(position) {
            case 0:
                fragment = new HomeFragment();
                break;

            case 1:
                break;

            case 2: 
                break;
            }

            if(fragment != null) {
                FragmentManager fragmentManager = getFragmentManager();
                fragmentManager.beginTransaction().replace(R.id.frame_container, fragment).commit();

                mDrawerList.setItemChecked(position, true);
                mDrawerList.setSelection(position);
                setTitle(navMenuTitles[position]);
                mDrawerLayout.closeDrawer(mDrawerList);
            } else {
                Log.e("MainActivity", "Error in creating the fragment");
            }
        }   
    }
}

fragment_home.xml

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

    <TextView 
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:text="sadsa" />
</fragment>

编辑：

添加 HomeFragment.java

package com.example.slidingmenu;

import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class HomeFragment extends Fragment {

    public HomeFragment() {}

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
            Bundle savedIntanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

        return rootView;
    }
}

Answer 1

这部分看起来很重要：

>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.example.slidingmenu.HomeFragment.onCreateView(HomeFragment.java:16)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Fragment.performCreateView(Fragment.java:1695)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.app.Activity.onCreateView(Activity.java:4765)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
>     02-22 19:11:14.110: E/AndroidRuntime(2075):   at com.example.slidingmenu.HomeFragment.onCreateView(HomeFragment.java:16)

注意到我发布的第一行和最后一行是一样的吗？告诉我片段正试图将自己膨胀到自身中。片段布局/代码在哪里？

编辑

问题出在您的片段 xml 中。您使用的 rood 视图是“片段”，xml 中的片段标记表示“将其替换为我在我的 id/name 中声明的片段的实例”！

效果是，每次您的片段膨胀时，它都会尝试在自身内部膨胀...

您需要做的是用merge（如果您知道这是做什么的）或ViewGroup（例如FrameLayout、RelativeLayout 或LinearLayout）替换片段xml 中的根标记

Answer 2

尝试从 Fragment Activity 扩展您的 MainActivity

public class MainActivity extends FragmentActivity