TabHost:无法启动活动componentinfo java.lang.nullpointerexception

我做了4个布局，分别是小布局、普通布局、大布局和xlarge布局，我使用的是Android 2.3和HostTab活动，当我在具有小布局、普通布局和大布局的设备上运行它时，工作正常，但当我遇到xlarge布局（10.1）时，它会在tabhost中崩溃。我不确定，但我猜TabHost在不同的布局上有问题，这个logcat：

    07-23 08:01:24.099: E/AndroidRuntime(9505): FATAL EXCEPTION: main
07-23 08:01:24.099: E/AndroidRuntime(9505): java.lang.RuntimeException: Unable to start activity ComponentInfo{id.co.ajsmsig/id.co.ajsmsig.epolicy.EpolicyMainTab}: java.lang.RuntimeException: Unable to start activity ComponentInfo{id.co.ajsmsig/id.co.ajsmsig.epolicy.EpolicyListPolis}: java.lang.NullPointerException
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2122)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.access$600(ActivityThread.java:140)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1228)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.os.Looper.loop(Looper.java:137)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.main(ActivityThread.java:4895)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at java.lang.reflect.Method.invokeNative(Native Method)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at java.lang.reflect.Method.invoke(Method.java:511)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at dalvik.system.NativeStart.main(Native Method)
07-23 08:01:24.099: E/AndroidRuntime(9505): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{id.co.ajsmsig/id.co.ajsmsig.epolicy.EpolicyListPolis}: java.lang.NullPointerException
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:1938)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:705)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.widget.TabHost.setCurrentTab(TabHost.java:369)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.widget.TabHost.addTab(TabHost.java:247)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at id.co.ajsmsig.epolicy.EpolicyMainTab.onCreate(EpolicyMainTab.java:44)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.Activity.performCreate(Activity.java:5163)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2061)
07-23 08:01:24.099: E/AndroidRuntime(9505):     ... 11 more
07-23 08:01:24.099: E/AndroidRuntime(9505): Caused by: java.lang.NullPointerException
07-23 08:01:24.099: E/AndroidRuntime(9505):     at id.co.ajsmsig.epolicy.EpolicyListPolis.onCreate(EpolicyListPolis.java:82)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.Activity.performCreate(Activity.java:5163)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
07-23 08:01:24.099: E/AndroidRuntime(9505):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2061)
07-23 08:01:24.099: E/AndroidRuntime(9505):     ... 21 more

这是我的EpolicyMainTab.java：

    @SuppressWarnings("deprecation")
public class EpolicyMainTab extends TabActivity {
    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        //hide title bar
        BasicDisplaySettings.toggleTaskBar(EpolicyMainTab.this, false);
        //show status bar
        BasicDisplaySettings.toggleStatusBar(EpolicyMainTab.this, true);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.epolicy);

        Resources res = getResources(); // Resource object to get Drawables
        TabHost tabHost = getTabHost();  // The activity TabHost
        TabHost.TabSpec spec;  // Resusable TabSpec for each tab
        Intent intent;  // Reusable Intent for each tab

        // Create an Intent to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, EpolicyListPolis.class);
        spec = tabHost.newTabSpec("Home").setIndicator("",
                  res.getDrawable(R.drawable.epolicy_menu_xml_home))
                  .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, NABActivity.class);
        spec = tabHost.newTabSpec("NAB").setIndicator("",
                  res.getDrawable(R.drawable.epolicy_menu_xml_nab))
                  .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, ContactActivity.class);
        spec = tabHost.newTabSpec("Contact").setIndicator("",
                  res.getDrawable(R.drawable.epolicy_menu_xml_contact))
                  .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, AgenActivity.class);
        spec = tabHost.newTabSpec("Agen").setIndicator("",
                  res.getDrawable(R.drawable.epolicy_menu_xml_agen))
                  .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, EpolicyBantuan.class);
        spec = tabHost.newTabSpec("Bantuan").setIndicator("",
                  res.getDrawable(R.drawable.epolicy_menu_xml_bantuan))
                  .setContent(intent);
                tabHost.addTab(spec);

        for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++){
            tabHost.getTabWidget().getChildAt(i).setPadding(0,0,0,0);
            tabHost.getTabWidget().getChildTabViewAt(i).setBackgroundDrawable(null);
        }
        tabHost.setCurrentTab(0);

    }

     @Override
        public void onBackPressed() {
         finish();
        }
}

@SuppressWarnings（“弃用”）
公共类EpolicyMainTab扩展了TabActivity{
/**在首次创建活动时调用*/
创建时的公共void（Bundle savedInstanceState）{
//隐藏标题栏
基本显示设置。切换任务栏（EpolicyMainTab.this，false）；
//显示状态栏
BasicDisplaySettings.toggleStatusBar（EpolicyMainTab.this，true）；
super.onCreate（savedInstanceState）；
setContentView（R.layout.epolicy）；
Resources res=getResources（）；//获取可绘图项的资源对象
TabHost TabHost=getTabHost（）；//活动TabHost
TabHost.TabSpec；//为每个选项卡恢复TabSpec
意图；//每个选项卡的可重用意图
//创建为选项卡启动活动的意图（要重用）
intent=new intent（）.setClass（这是EpolicyListPolis.class）；
spec=tabHost.newTabSpec（“主”）.setIndicator（“，
res.getDrawable（R.drawable.epolicy\u菜单\u xml\u主页））
.setContent（意图）；
tabHost.addTab（spec）；
intent=new intent（）.setClass（这是NABActivity.class）；
spec=tabHost.newTabSpec（“NAB”）.setIndicator（“，
res.getDrawable（R.drawable.epolicy\u菜单\u xml\u nab））
.setContent（意图）；
tabHost.addTab（spec）；
intent=new intent（）.setClass（这是ContactActivity.class）；
spec=tabHost.newTabSpec（“联系人”）.setIndicator（“，
res.getDrawable（R.drawable.epolicy\u菜单\u xml\u联系人））
.setContent（意图）；
tabHost.addTab（spec）；
intent=new intent（）.setClass（这个，agencActivity.class）；
spec=tabHost.newTabSpec（“代理”）.setIndicator（“，
res.getDrawable（R.drawable.epolicy\u菜单\u xml\u代理））
.setContent（意图）；
tabHost.addTab（spec）；
intent=new intent（）.setClass（这是EpolicyBantuan.class）；
spec=tabHost.newTabSpec（“Bantuan”）.setIndicator（“，
res.getDrawable（R.drawable.epolicy\u menu\u xml\u bantuan））
.setContent（意图）；
tabHost.addTab（spec）；
对于（int i=0；i

这是我的EpolicyListPolis：

    public class EpolicyListPolis extends ListActivity {
    static String PEMEGANG="PEMEGANG";
    static String POLIS="POLIS";
    static String STATUS="STATUS";
    static String TERTANGGUNG="TERTANGGUNG";
    String KEY, strUser;
    private ArrayList<ListPolis>NasabahList;

    ListView list;
    private ProgressDialog Dialog;
    private String strStoragePath = "",
            strNameFileDiv = "";
    ImageView LogoutButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTitle(R.string.Nomor_Polis);
        setContentView(R.layout.epolicy_list_polis)
        SharedPreferences settings = getSharedPreferences("PREFS_NAME", 0);
        strUser= settings.getString("etUser", null);
        KEY = settings.getString("key", null);
        //Related to storage
        strStoragePath = getResources().getString(R.string.storagepath);
        strNameFileDiv = getResources().getString(R.string.filediv);
        LogoutButton=(ImageView)findViewById(R.id.LogoutButton);
        NasabahList= new ArrayList<ListPolis>();
        new NasabahAsyncTask().execute();

        LogoutButton.setOnClickListener(new OnClickListener(){
            public void onClick(View v) {
                dialogSignOut();
            }
        });
            }
public class NasabahAsyncTask extends AsyncTask<Void, Void, String>{
    String url = ("http://www.abc.xyz"+strUser+"&k="+KEY);
    public NasabahAsyncTask() {
        this.url=url;
        // TODO Auto-generated constructor stub
    }

    protected void onPreExecute() {
        super.onPreExecute();   
        Dialog = ProgressDialog.show(EpolicyListPolis.this, "", "Melakukan Pengambilan Data");
    }

@Override
protected String doInBackground(Void... params) {
    String result="";
    try {
        result=Connection.get(url);
        System.out.println(url);
    }catch (Exception e){
        result=" ";
        Log.d("test viewer",e.getMessage());
    }
    return result;
}

@Override
protected void onPostExecute(String result) {
    super.onPostExecute(result);
    fetchResponse(result.replace("\n", "").trim());
    Dialog.dismiss();
    ListView lv = getListView();

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

            String POLIS = ((TextView)view.findViewById(R.id.polis)).getText().toString();

            SharedPreferences settings = getSharedPreferences("PREFS_NAME", 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("POLIS", POLIS);
            editor.commit();
            Intent in = new Intent(EpolicyListPolis.this, EpolicyTabKategori.class);

            startActivity(in);
        }
    });
            }
}

private void fetchResponse(String result) {
    // TODO Auto-generated method stub
    if (!result.equals("")) {
        try {
            JSONArray jsonArray = new JSONArray(result);
            ListPolis lp=null;
            for (int i = 0; i < jsonArray.length(); i++) {

                JSONObject jsonObject = jsonArray.getJSONObject(i);

                lp= new ListPolis(jsonObject.optString("POLIS"), 
                        jsonObject.optString("PEMEGANG"),
                        jsonObject.optString("TERTANGGUNG"), 
                        jsonObject.optString("STATUS"));
                NasabahList.add(lp);
                list=(ListView)findViewById(android.R.id.list);
}
        }catch (JSONException e) {

            e.printStackTrace();
        }

        }
    }
@Override
public void onBackPressed() {
    dialogExit();
}
public void dialogExit()
{

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Apakah anda ingin keluar?")
           .setCancelable(false)
           .setPositiveButton("Ya", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   Intent itSplashEnd = new Intent(EpolicyListPolis.this, SplashEnd.class);
                   //setIntent.addCategory(Intent.CATEGORY_HOME);
                   itSplashEnd.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
                   itSplashEnd.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                   startActivity(itSplashEnd);
                   finish();
                   System.exit(0);

               }
           })
           .setNegativeButton("Tidak", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
               }
           });
    AlertDialog alert = builder.create();
    alert.show();
}

public void dialogSignOut()
{
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Apakah anda ingin sign-out?")
           .setCancelable(false)
           .setPositiveButton("Ya", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {

                   SharedPreferences settings =getSharedPreferences("PREFS_NAME", 0);;
                   settings.edit().clear().commit();
                   Intent itSignOut = new Intent(EpolicyListPolis.this, EpolicyMainActivity.class);
                   itSignOut.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                   startActivity(itSignOut);
                   finish();
               }
           })
           .setNegativeButton("Tidak", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
               }
           });
    AlertDialog alert = builder.create();
    alert.show();
}

公共类EpolicyListPolis扩展了ListActivity{
静态字符串PEMEGANG=“PEMEGANG”；
静态字符串POLIS=“POLIS”；
静态字符串STATUS=“STATUS”；
静态字符串TERTANGGUNG=“TERTANGGUNG”；
串键；
私人ArrayListNasabahList；
列表视图列表；
私人对话；
私有字符串strStorage Path=“”，
strNameFileDiv=“”；
图像视图注销按钮；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setTitle（R.string.Nomor_Polis）；
setContentView（R.layout.epolicy\u list\u polis）
SharedReferences设置=GetSharedReferences（“首选项名称”，0）；
strUser=settings.getString（“etUser”，null）；
KEY=settings.getString（“KEY”，null）；
//与存储相关
strStoragePath=getResources（）.getString（R.string.storagepath）；
strNameFileDiv=getResources（）.getString（R.string.filediv）；
LogoutButton=（ImageView）findViewById（R.id.LogoutButton）；
NasabahList=newarraylist（）；
新建NasabahAsyncTask（）.execute（）；
LogoutButton.setOnClickListener（新的OnClickListener（）{
公共void onClick（视图v）{
dialogSignOut（）；
}
});
}
公共类NasabahAsyncTask扩展异步任务{
字符串url=（“http://www.abc.xyz“+strUser+”&k=“+键）；
NasabahAsyncTask公共图书馆（）{
this.url=url；
//TODO自动生成的构造函数存根
}
受保护的void onPreExecute（）{
super.onPreExecute（）；
Dialog=ProgressDialog.show（EpolicyListPolis.this，“，”Melakukan Pengambilan Data”）；
}
@凌驾
受保护字符串doInBackground（无效…参数）{
字符串结果=”；
试一试{
结果=Connection.get（url）；
System.out.println（url）；
}捕获（例外e）{
结果=”；
Log.d（“测试查看器”，e.getMessage（））；
}
返回结果；
}
@凌驾
受保护的void onPostExecute（字符串结果）{
super.onPostExecute（结果）；
fetchResponse（result.replace（“\n”和“）.trim（））；
Dialog.dismise（）；
ListView lv=getListView（）；
lv.setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
字符串POLIS=（（TextView）view.findviewbyd（R.id.POLIS））.getText（）.toString（）；
SharedReferences设置=GetSharedReferences（“首选项名称”，0）；
SharedReferences.Editor=settings.edit（）；
编辑：putString（“POLIS”，POLIS）；
commit（）；
Intent in=新Intent（EpolicyListPolis.this，EpolicyTabKategori.class）；
星触觉（in）；
}
});
}
}
私有void fetchResponse（字符串结果）{
//TODO自动生成的方法存根
如果（！result.equals（“”）{
试一试{
杰索纳雷j
    <?xml version="1.0" encoding="utf-8"?>
<manifest package="id.co.ajsmsig"
    android:versionCode="2"
    android:versionName="1.1"
    xmlns:android="http://schemas.android.com/apk/res/android">

  <supports-screens 
          android:smallScreens="true" 
          android:normalScreens="true" 
          android:largeScreens="true"
          android:xlargeScreens="true"
          android:anyDensity="true" />

    <uses-sdk android:minSdkVersion="9" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:debuggable="true" >

        <activity
            android:name=".epolicy.SplashEpolicy"
            android:label="@string/app_name" 
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

         <activity
            android:name=".epolicy.SplashEnd"
            android:label="@string/app_name" 
            android:screenOrientation="portrait">
            </activity>
        <activity 
            android:name=".epolicy.EpolicyMainActivity" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
            <activity 
            android:name=".epolicy.EpolicyMainTab" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.EpolicyTabKategori" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabPPEpolicy" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabTTEpolicy" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabDatAsu" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabManfaat" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabInvestasi" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabStatus" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabRekening" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
                <activity 
            android:name=".epolicy.TabNabDetail" 
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" 
        ></activity>
        <activity 
            android:name=".epolicy.SplashOutActivity" 
            android:label="@string/app_name"
            android:screenOrientation="portrait"
        ></activity>

        <activity 
            android:name=".epolicy.LoginActivity" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
        <activity 
            android:name=".epolicy.NABActivity" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
             <activity 
            android:name=".epolicy.NABActivityDetail" 
            android:label="@string/NAB_detail"
            android:screenOrientation="portrait" 
        ></activity>
              <activity 
            android:name=".epolicy.TabelNABDetail" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
        <activity 
            android:name=".epolicy.ContactActivity" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
        <activity 
            android:name=".epolicy.AgenActivity" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                <activity 
            android:name=".epolicy.EpolicyFaq" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                 <activity 
            android:name=".epolicy.EpolicyBantuan" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                 <activity 
            android:name=".epolicy.EpolicyIstilah" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                 <activity 
            android:name=".epolicy.EpolicyPanduan" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                 <activity 
            android:name=".epolicy.EpolicyListPolis" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>
                 <activity 
            android:name=".epolicy.KategoriNomorPolis" 
            android:label="@string/kategori_polis"
            android:screenOrientation="portrait" 
        ></activity>
                  <activity 
            android:name=".epolicy.PPViewerEpolicy" 
            android:label="@string/pp"
            android:screenOrientation="portrait" 
        ></activity>
             <activity 
            android:name=".epolicy.TTViewerEpolicy" 
            android:label="@string/tt"
            android:screenOrientation="portrait" 
        ></activity>  
         <activity 
            android:name=".epolicy.RekViewerEpolicy" 
            android:label="@string/Rekening"
            android:screenOrientation="portrait" 
        ></activity>  
         <activity 
            android:name=".epolicy.DatAsuViewerEpolicy" 
            android:label="@string/Dat_asu"
            android:screenOrientation="portrait" 
        ></activity>
          <activity 
            android:name=".epolicy.ManfaatViewerEpolicy" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>    
          <activity 
            android:name=".epolicy.InvestasiViewerEpolicy" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>     
          <activity 
            android:name=".epolicy.StatusViewerEpolicy" 
            android:label="@string/app_name"
            android:screenOrientation="portrait" 
        ></activity>   

    </application>

</manifest>