InflateException上inflater.inflate（）方法调用 [英] InflateException on inflater.inflate() method call

问题描述

我一直在试图夸大我的 MenuAdapter 类视图得到一个InflateException。我已经包围了麻烦code在try-catch块，并收到错误消息：

链接整个项目：

https://docs.google.com/file/d/ 0B2Iwl4UysxOMa3E5a1l2SHZwOG8 /编辑？USP =共享

  

二进制XML文件行＃1：错误充气类

这里是code：

 包com.example.sidemenututorial;进口android.content.Context;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.BaseAdapter;
进口android.widget.ImageView;
进口android.widget.TextView;公共类MenuListAdapter延伸BaseAdapter {    //字段----------------------------------------------- ------------------
    私人上下文的背景下;
    私有String []标题;
    私有String []字幕;
    私人诠释[]图标;
    私人LayoutInflater吹气;    //构造----------------------------------------------- -------------
    公共MenuListAdapter（
            上下文的背景下，
            的String []冠军，
            的String []字幕，
            INT []图标）{
        this.context =背景;
        this.titles =职称;
        this.subtitles =字幕;
        this.icons =图标;
        吹气=（LayoutInflater）context.getSystemService（
                Context.LAYOUT_INFLATER_SERVICE）;
    }    //访问器----------------------------------------------- ---------------
    @覆盖
    公众诠释的getCount（）{
        返回titles.length;
    }
    @覆盖
    公共对象的getItem（INT位置）{
        回到标题[位置]
    }
    @覆盖
    众长getItemId（INT位置）{
        返回的位置;
    }    // 方法  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - - -----------------
    公共查看getView（INT位置，查看convertView，父母的ViewGroup）{        ViewHolder viewHolder;        //只有膨胀的观点，如果convertView为null
        如果（convertView == NULL）{
            viewHolder =新ViewHolder（）;
            convertView = inflater.inflate（
                    R.layout.drawer_list_item，父母，假）;
            viewHolder.txtTitle =（TextView中）convertView.findViewById（
                    R.id.title）;
            viewHolder.txtSubtitle =（TextView中）convertView.findViewById（
                    R.id.subtitle）;
            viewHolder.imgIcon =（ImageView的）convertView.findViewById（
                    R.id.icon）;            //这是第一次这种观点已经被夸大，
            //这样的观点持有者存储在其标签领域
            convertView.setTag（viewHolder）;
        }其他{
            viewHolder =（ViewHolder）convertView.getTag（）;
        }        //根据需要设置的意见领域
        viewHolder.txtTitle.setText（标题[位置]）;
        viewHolder.txtSubtitle.setText（字幕[位置]）;
        viewHolder.imgIcon.setImageResource（图标[位置]）;        返回convertView;
    }    //类----------------------------------------------- -----------------
    静态类ViewHolder {
        TextView的txtTitle;
        TextView的txtSubtitle;
        ImageView的imgIcon;
    }}这里是它试图膨胀时，drawer_list_item.xml的观点：        ＆LT;的LinearLayout
        的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
            机器人：layout_width =match_parent
            机器人：layout_height =match_parent
            机器人：背景=机器人：彩色/ darker_gray
            机器人：方向=横向
            风格=ATTR / DROPDOWNLIST preferredItemHeight？＆GT;        ＆LT; ImageView的
            机器人：ID =@ + ID /图标
            机器人：layout_width =WRAP_CONTENT
            机器人：layout_height =match_parent
            机器人：adjustViewBounds =真/＆GT;        ＆LT;的LinearLayout
            机器人：layout_width =WRAP_CONTENT
            机器人：layout_height =match_parent
            机器人：重力=center_vertical |左
            机器人：方向=垂直＆GT;            ＆LT;的TextView
                机器人：ID =@ + ID /标题
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：ellipsize =结束
                机器人：单线=真
                风格= /＆GTATTR / spinnerDropDownItemStyle？
            ＆LT;的TextView
                机器人：ID =@ + ID /副标题
                机器人：layout_width =WRAP_CONTENT
                机器人：layout_height =WRAP_CONTENT
                机器人：ellipsize =结束
                机器人：单线=真
                机器人：textAppearance =？ATTR / textAppearanceSmall
                风格= /＆GTATTR / spinnerDropDownItemStyle？        ＆LT; / LinearLayout中＆GT;    ＆LT; / LinearLayout中＆GT;
 

这里是客户端code调用该菜单适配器：

 包com.example.sidemenututorial;    进口android.content.res.Configuration;
    进口android.os.Bundle;
    进口android.support.v4.app.ActionBarDrawerToggle;
    进口android.support.v4.app.Fragment;
    进口android.support.v4.app.FragmentTransaction;
    进口android.support.v4.view.GravityCompat;
    进口android.support.v4.widget.DrawerLayout;
    进口android.view.View;
    进口android.widget.AdapterView;
    进口android.widget.ListView;    进口com.actionbarsherlock.app.SherlockFragmentActivity;
    进口com.actionbarsherlock.view.MenuItem;    公共类MainActivity扩展SherlockFragmentActivity {        //字段----------------------------------------------- ------------------
        私人DrawerLayout drawerLayout;
        私人的ListView drawerList;
        私人ActionBarDrawerToggle drawerToggle;
        私人MenuListAdapter menuAdapter;
        私人诠释[]图标;
        私人片段片段1;
        私人片段fragment2;
        私人片段fragment3;
        私人CharSequence的drawerTitle;
        私人CharSequence的称号;
        私人最终的String []标题=新的String [] {
                标题片段＃1，
                标题片段＃2，
                标题片段＃3
        };
        私人最终的String [] =字幕新的String [] {
                字幕片段＃1，
                字幕片段＃2，
                字幕片段＃3
        };        //生命周期回调---------------------------------------------- ------
        @覆盖
        保护无效的onCreate（捆绑savedInstanceState）{            //基地实行
            super.onCreate（savedInstanceState）;
            的setContentView（R.layout.activity_main）;            //实例片段
            片段1 =新片段1（）;
            fragment2 =新Fragment2（）;
            fragment3 =新Fragment3（）;            //这项活动获得冠军
            标题= drawerTitle =的getTitle（）;            //从绘制资源文件夹的图标
            图标= INT新[] {
                    R.drawable.action_about，
                    R.drawable.action_settings，
                    R.drawable.collections_cloud
            };            //从XML文件中的抽屉布局，里面的ListView控件
            drawerLayout =（DrawerLayout）findViewById（R.id.drawer_layout）;
            drawerList =（ListView控件）findViewById（R.id.listview_drawer）;            //设置自定义阴影的覆盖的主要内容
            //当抽屉打开
            drawerLayout.setDrawerShadow（
                    R.drawable.drawer_shadow，GravityCompat.START）;            //传递字符串数组的MenuListAdapter，设置抽屉
            //名单适配器，并设置其点击监听器
            menuAdapter =新MenuListAdapter（
                    MainActivity.this，标题，副标题，图标）;
            drawerList.setAdapter（menu​​Adapter）;
            drawerList.setOnItemClickListener（新DrawerItemClickListener（））;            //启用操作栏中有向上导航
            getSupportActionBar（）setHomeButtonEnabled（真）。
            getSupportActionBar（）setDisplayHomeAsUpEnabled（真）。            //允许的操作键切换抽屉
            drawerToggle =新ActionBarDrawerToggle（
                    这个，
                    drawerLayout，
                    R.drawable.ic_drawer，
                    R.string.drawer_open，
                    R.string.drawer_close）{                公共无效onDrawerClosed（查看视图）{
                    super.onDrawerClosed（视图）;
                }
                公共无效onDrawerOpened（查看视图）{
                    。getSupportActionBar（）的setTitle（drawerTitle）;
                    super.onDrawerOpened（视图）;
                }
            };
            drawerLayout.setDrawerListener（drawerToggle）;            //如果这是第一次打开这个活动，
            //使用装载片段＃1开始
            如果（savedInstanceState == NULL）{
                选择信息（0）;
            }        }        // 方法  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - - -----------------
        @覆盖
        公共布尔onOptionsItemSelected（菜单项项）{            //如果用户有pressed操作栏图标
            如果（item.getItemId（）== android.R.id.home）{                //如果抽屉打开，关闭它;反之亦然
                如果（drawerLayout.isDrawerOpen（drawerList））{
                    drawerLayout.closeDrawer（drawerList）;
                }其他{
                    drawerLayout.openDrawer（drawerList）;
                }
            }            //完成通过让超类做休息
            返回super.onOptionsItemSelected（项目）;        }
        @覆盖
        保护无效onPostCreate（捆绑savedInstanceState）{            //调用超级实施和同步抽屉
            super.onPostCreate（savedInstanceState）;
            drawerToggle.syncState（）;        }
        @覆盖
        公共无效onConfigurationChanged（配置NEWCONFIG）{            //调用超上实行本次活动
            //和抽屉切换对象
            super.onConfigurationChanged（NEWCONFIG）;
            drawerToggle.onConfigurationChanged（NEWCONFIG）;        }
        私人无效选择信息（INT位置）{            //创建一个新片段事务并启动它
            FragmentTransaction fragTran = getSupportFragmentManager（）
                                           .beginTransaction（）;            //找到选定的位置更换内容视图
            用数字的选择的片段//
            开关（位置）{
                情况下0：{
                    fragTran.replace（R.id.content_frame，片段1）;
                    打破;
                }
                情况1：{
                    fragTran.replace（R.id.content_frame，fragment2）;
                    打破;
                }
                案例2：{
                    fragTran.replace（R.id.content_frame，fragment3）;
                    打破;
                }
            }            //提交事务，并关上抽屉
            fragTran.commit（）;
            drawerList.setItemChecked（位置，真正的）;
            drawerLayout.closeDrawer（drawerList）;        }
        公共无效的setTitle（CharSequence的标题）{            //保存在标题中传递，并设置操作栏标题
            this.title =称号;
            getSupportActionBar（）的setTitle（职称）。        }        //类----------------------------------------------- -----------------
        私有类DrawerItemClickListener
        实现ListView.OnItemClickListener {            @覆盖
            公共无效onItemClick（
                    适配器视图＆LT;＆GT;父母，
                    视图来看，
                    INT位置，
                    长ID）{                //点​​击后，选择打开相应的片段
                选择信息（位置）;            }        }    }
 

以及日志崩溃的：

  09-26 16：45：43.081：D / AndroidRuntime（1121）：关闭VM
09-26 16：45：43.081：W / dalvikvm（1121）：主题ID = 1：螺纹未捕获的异常（组= 0x409961f8）退出
09-26 16：45：45.561：E / AndroidRuntime（1121年）：致命异常：主要
09-26 16：45：45.561：E / AndroidRuntime（1121年）：显示java.lang.NullPointerException
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在com.example.sidemenututorial.MenuListAdapter.getView（MenuListAdapter.java:73）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.AbsListView.obtainView（AbsListView.java:2033）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.ListView.makeAndAddView（ListView.java:1772）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.ListView.fillDown（ListView.java:672）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.ListView.fillFromTop（ListView.java:732）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.ListView.layoutChildren（ListView.java:1625）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.AbsListView.onLayout（AbsListView.java:1863）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.View.layout（View.java:11180）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewGroup.layout（ViewGroup.java:4203）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.support.v4.widget.DrawerLayout.onLayout（DrawerLayout.java:672）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.View.layout（View.java:11180）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewGroup.layout（ViewGroup.java:4203）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.FrameLayout.onLayout（FrameLayout.java:431）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.View.layout（View.java:11180）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewGroup.layout（ViewGroup.java:4203）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1628）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1486）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.LinearLayout.onLayout（LinearLayout.java:1399）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.View.layout（View.java:11180）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewGroup.layout（ViewGroup.java:4203）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.widget.FrameLayout.onLayout（FrameLayout.java:431）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.View.layout（View.java:11180）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewGroup.layout（ViewGroup.java:4203）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1468）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.view.ViewRootImpl.handleMessage（ViewRootImpl.java:2418）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.os.Handler.dispatchMessage（Handler.java:99）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.os.Looper.loop（Looper.java:137）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在android.app.ActivityThread.main（ActivityThread.java:4340）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在java.lang.reflect.Method.invokeNative（本机方法）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在java.lang.reflect.Method.invoke（Method.java:511）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:784）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:551）
09-26 16：45：45.561：E / AndroidRuntime（1121年）：在dalvik.system.NativeStart.main（本机方法）
09-26 16：45：45.593：D / dalvikvm（1121）：GC_CONCURRENT释放191K，免费3％14296K / 14599K，暂停12毫秒+ 8ms的
 

解决方案

使用一个ViewHolder

http://developer.android.com/training/improving-布局/平滑scrolling.html

您getView改为

 公共查看getView（INT位置，查看convertView，父母的ViewGroup）{    ViewHolder VH;
    如果（convertView == NULL）
    {
      VH =新ViewHolder（）;
      convertView = inflater.inflate（
                R.layout.drawer_list_item，父母，假）;
      vh.txtTitle =（TextView中）convertView.findViewById（R.id.title）;
      vh.txtSubtitle =（TextView中）convertView.findViewById（R.id.subtitle）;
      vh.imgIcon =（ImageView的）convertView.findViewById（R.id.icon）;        convertView.setTag（VH）;
    }其他{
    VH =（ViewHolder）convertView.getTag（）;
    }
    vh.txtTitle.setText（标题[位置]）;
    vh.txtSubtitle.setText（字幕[位置]）;
    vh.imgIcon.setImageResource（图标[位置]）;    返回convertView;
    }
静态类ViewHolder
{
TextView的txtTitle，txtSubtitle;
ImageView的imgIcon;
}
 

另外移动下面的构造。这个声明为一个类成员 LayoutInflater吹气

在你的构造

  =吹气（LayoutInflater）context.getSystemService（
                Context.LAYOUT_INFLATER_SERVICE）;
 

编辑：

在 drawer_list_item.xml

修改

 的android：背景=机器人：彩色/ darker_gray
 

到

 的android：背景=@机器人：彩色/ darker_gray
 

I keep getting an InflateException upon trying to inflate a view in my MenuAdapter class. I've surrounded the troublesome code in a try-catch block and get the error Message:

link to the entire project:

https://docs.google.com/file/d/0B2Iwl4UysxOMa3E5a1l2SHZwOG8/edit?usp=sharing

Binary XML file line #1: Error inflating class

Here is the code:

package com.example.sidemenututorial;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MenuListAdapter extends BaseAdapter {

    // Fields -----------------------------------------------------------------
    private Context context;
    private String[] titles;
    private String[] subtitles;
    private int[] icons;
    private LayoutInflater inflater;

    // Constructor ------------------------------------------------------------
    public MenuListAdapter(
            Context context, 
            String[] titles, 
            String[] subtitles,
            int[] icons){
        this.context = context;
        this.titles = titles;
        this.subtitles = subtitles;
        this.icons = icons;
        inflater = (LayoutInflater)context.getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
    }

    // Accessors --------------------------------------------------------------
    @Override
    public int getCount(){
        return titles.length;
    }
    @Override
    public Object getItem(int position){
        return titles[position];
    }
    @Override
    public long getItemId(int position){
        return position;
    }

    // Methods ----------------------------------------------------------------
    public View getView(int position, View convertView, ViewGroup parent){

        ViewHolder viewHolder;

        // Only inflate the view if convertView is null
        if (convertView == null){
            viewHolder = new ViewHolder();
            convertView = inflater.inflate(
                    R.layout.drawer_list_item, parent, false);
            viewHolder.txtTitle = (TextView)convertView.findViewById(
                    R.id.title);
            viewHolder.txtSubtitle = (TextView)convertView.findViewById(
                    R.id.subtitle);
            viewHolder.imgIcon = (ImageView)convertView.findViewById(
                    R.id.icon);

            // This is the first time this view has been inflated,
            // so store the view holder in its tag fields
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder)convertView.getTag();
        }

        // Set the views fields as needed
        viewHolder.txtTitle.setText(titles[position]);
        viewHolder.txtSubtitle.setText(subtitles[position]);
        viewHolder.imgIcon.setImageResource(icons[position]);

        return convertView;
    }

    // Classes ----------------------------------------------------------------
    static class ViewHolder {
        TextView txtTitle;
        TextView txtSubtitle;
        ImageView imgIcon;
    }

}

And here is the view it is trying to inflate, the drawer_list_item.xml:

        <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="?android:color/darker_gray"
            android:orientation="horizontal"
            style="?attr/dropdownListPreferredItemHeight" >

        <ImageView
            android:id="@+id/icon"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:adjustViewBounds="true"/>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center_vertical|left"
            android:orientation="vertical">

            <TextView
                android:id="@+id/title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ellipsize="end"
                android:singleLine="true"
                style="?attr/spinnerDropDownItemStyle"/>
            <TextView 
                android:id="@+id/subtitle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ellipsize="end"
                android:singleLine="true"
                android:textAppearance="?attr/textAppearanceSmall"
                style="?attr/spinnerDropDownItemStyle"/>

        </LinearLayout>    

    </LinearLayout>

And here is the client code that is calling the menu adapter:

        package com.example.sidemenututorial;

    import android.content.res.Configuration;
    import android.os.Bundle;
    import android.support.v4.app.ActionBarDrawerToggle;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentTransaction;
    import android.support.v4.view.GravityCompat;
    import android.support.v4.widget.DrawerLayout;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.ListView;

    import com.actionbarsherlock.app.SherlockFragmentActivity;
    import com.actionbarsherlock.view.MenuItem;

    public class MainActivity extends SherlockFragmentActivity {

        // Fields -----------------------------------------------------------------
        private DrawerLayout drawerLayout;
        private ListView drawerList;
        private ActionBarDrawerToggle drawerToggle;
        private MenuListAdapter menuAdapter;
        private int[] icons;
        private Fragment fragment1;
        private Fragment fragment2;
        private Fragment fragment3;
        private CharSequence drawerTitle;
        private CharSequence title;
        private final String[] titles = new String[]{
                "Title Fragment #1",
                "Title Fragment #2",
                "Title Fragment #3"
        };
        private final String[] subtitles = new String[]{
                "Subtitle Fragment #1",
                "Subtitle Fragment #2",
                "Subtitle Fragment #3"
        };

        // Lifecycle Callbacks ----------------------------------------------------
        @Override
        protected void onCreate(Bundle savedInstanceState) {

            // Base implemenation
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            // Instantiate the fragments
            fragment1 = new Fragment1();
            fragment2 = new Fragment2();
            fragment3 = new Fragment3();

            // Get the title from this activity
            title = drawerTitle = getTitle();

            // Get the icons from the drawables folder
            icons = new int[]{
                    R.drawable.action_about,
                    R.drawable.action_settings,
                    R.drawable.collections_cloud
            };

            // Get the drawer layout from the XML file and the ListView inside it
            drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
            drawerList = (ListView)findViewById(R.id.listview_drawer);

            // Set a custom shadow over that overlays the main content
            // when the drawer opens
            drawerLayout.setDrawerShadow(
                    R.drawable.drawer_shadow, GravityCompat.START);

            // Pass the string arrays to the MenuListAdapter, set the drawer
            // list adapter to it and set up its click listener
            menuAdapter = new MenuListAdapter(
                    MainActivity.this, titles, subtitles, icons);
            drawerList.setAdapter(menuAdapter);
            drawerList.setOnItemClickListener(new DrawerItemClickListener());

            // Enable the action bar to have up navigation
            getSupportActionBar().setHomeButtonEnabled(true);
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);

            // Allow the the action bar to toggle the drawer
            drawerToggle = new ActionBarDrawerToggle(
                    this,
                    drawerLayout,
                    R.drawable.ic_drawer,
                    R.string.drawer_open,
                    R.string.drawer_close){

                public void onDrawerClosed(View view){
                    super.onDrawerClosed(view);
                }
                public void onDrawerOpened(View view){
                    getSupportActionBar().setTitle(drawerTitle);
                    super.onDrawerOpened(view);
                }
            };
            drawerLayout.setDrawerListener(drawerToggle);

            // If this is the first time opening this activity,
            // start with loading fragment #1
            if (savedInstanceState == null){
                selectItem(0);
            }       

        }

        // Methods ----------------------------------------------------------------
        @Override
        public boolean onOptionsItemSelected(MenuItem item){

            // If the user has pressed the action bar icon
            if (item.getItemId() == android.R.id.home){

                // If the drawer is open, close it; vice versa
                if (drawerLayout.isDrawerOpen(drawerList)){
                    drawerLayout.closeDrawer(drawerList);
                } else {
                    drawerLayout.openDrawer(drawerList);
                }
            }

            // Finish by letting the super class do the rest
            return super.onOptionsItemSelected(item);

        }
        @Override
        protected void onPostCreate(Bundle savedInstanceState){

            // Call the super implementation and synchronize the drawer
            super.onPostCreate(savedInstanceState);
            drawerToggle.syncState();

        }
        @Override
        public void onConfigurationChanged(Configuration newConfig){

            // Call the super implemenation on this activity
            // and the drawer toggle object
            super.onConfigurationChanged(newConfig);
            drawerToggle.onConfigurationChanged(newConfig);

        }
        private void selectItem(int position){

            // Create a new fragment transaction and start it
            FragmentTransaction fragTran = getSupportFragmentManager()
                                           .beginTransaction();

            // Locate the position selected replace the content view
            // with the fragment of the number selected
            switch (position){
                case 0:{
                    fragTran.replace(R.id.content_frame, fragment1);
                    break;
                }
                case 1:{
                    fragTran.replace(R.id.content_frame, fragment2);
                    break;
                }
                case 2:{
                    fragTran.replace(R.id.content_frame, fragment3);
                    break;
                }
            }

            // Commit the transaction and close the drawer
            fragTran.commit();
            drawerList.setItemChecked(position, true);
            drawerLayout.closeDrawer(drawerList);

        }
        public void setTitle(CharSequence title){

            // Save the passed in title and set the action bar title
            this.title = title;
            getSupportActionBar().setTitle(title);

        }

        // Classes ----------------------------------------------------------------
        private class DrawerItemClickListener 
        implements ListView.OnItemClickListener{

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

                // When clicked, select open the appropriate fragment
                selectItem(position);

            }

        }

    }

And a log of the crash:

09-26 16:45:43.081: D/AndroidRuntime(1121): Shutting down VM
09-26 16:45:43.081: W/dalvikvm(1121): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
09-26 16:45:45.561: E/AndroidRuntime(1121): FATAL EXCEPTION: main
09-26 16:45:45.561: E/AndroidRuntime(1121): java.lang.NullPointerException
09-26 16:45:45.561: E/AndroidRuntime(1121):     at com.example.sidemenututorial.MenuListAdapter.getView(MenuListAdapter.java:73)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.AbsListView.obtainView(AbsListView.java:2033)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.ListView.makeAndAddView(ListView.java:1772)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.ListView.fillDown(ListView.java:672)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.ListView.fillFromTop(ListView.java:732)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.ListView.layoutChildren(ListView.java:1625)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.AbsListView.onLayout(AbsListView.java:1863)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.View.layout(View.java:11180)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewGroup.layout(ViewGroup.java:4203)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:672)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.View.layout(View.java:11180)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewGroup.layout(ViewGroup.java:4203)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.View.layout(View.java:11180)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewGroup.layout(ViewGroup.java:4203)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.View.layout(View.java:11180)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewGroup.layout(ViewGroup.java:4203)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.View.layout(View.java:11180)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewGroup.layout(ViewGroup.java:4203)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1468)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2418)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.os.Looper.loop(Looper.java:137)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at android.app.ActivityThread.main(ActivityThread.java:4340)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at java.lang.reflect.Method.invokeNative(Native Method)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at java.lang.reflect.Method.invoke(Method.java:511)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-26 16:45:45.561: E/AndroidRuntime(1121):     at dalvik.system.NativeStart.main(Native Method)
09-26 16:45:45.593: D/dalvikvm(1121): GC_CONCURRENT freed 191K, 3% free 14296K/14599K, paused 12ms+8ms

解决方案

Use a ViewHolder

http://developer.android.com/training/improving-layouts/smooth-scrolling.html

Change your getView to

public View getView(int position, View convertView, ViewGroup parent){

    ViewHolder vh;
    if(convertView==null)
    {
      vh = new ViewHolder();
      convertView = inflater.inflate(
                R.layout.drawer_list_item, parent, false);  
      vh.txtTitle = (TextView) convertView.findViewById(R.id.title);
      vh.txtSubtitle = (TextView) convertView.findViewById(R.id.subtitle);
      vh.imgIcon = (ImageView) convertView.findViewById(R.id.icon); 

        convertView.setTag(vh); 
    } else { 
    vh = (ViewHolder) convertView.getTag(); 
    } 
    vh.txtTitle.setText(titles[position]);
    vh.txtSubtitle.setText(subtitles[position]);
    vh.imgIcon.setImageResource(icons[position]);

    return convertView;
    }
static class ViewHolder
{
TextView txtTitle,txtSubtitle;
ImageView imgIcon;
}

Also move the below to constructor. Declare this as a class member LayoutInflater inflater

In your constructor

   inflater = (LayoutInflater)context.getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);

Edit:

In drawer_list_item.xml

Change

 android:background="?android:color/darker_gray" 

to

android:background="@android:color/darker_gray"

这篇关于InflateException上inflater.inflate（）方法调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！