Databases
StackOverflow2013
Postsdbo
POAndroid: Get error java.lang.NullPointerException
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid: Get error java.lang.NullPointerException
    primarykey
    data
    text
    <p>I am new on android and i have created a project. In my activity i have ListView and Tabhost both and my activity extent listactivity. when i am running my project then it give error </p> <pre><code>10-18 14:26:13.053: E/AndroidRuntime(278): FATAL EXCEPTION: main 10-18 14:26:13.053: E/AndroidRuntime(278): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.shareslab/com.example.shareslab.MessageList}: java.lang.NullPointerException 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.os.Handler.dispatchMessage(Handler.java:99) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.os.Looper.loop(Looper.java:123) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread.main(ActivityThread.java:4627) 10-18 14:26:13.053: E/AndroidRuntime(278): at java.lang.reflect.Method.invokeNative(Native Method) 10-18 14:26:13.053: E/AndroidRuntime(278): at java.lang.reflect.Method.invoke(Method.java:521) 10-18 14:26:13.053: E/AndroidRuntime(278): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 10-18 14:26:13.053: E/AndroidRuntime(278): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 10-18 14:26:13.053: E/AndroidRuntime(278): at dalvik.system.NativeStart.main(Native Method) 10-18 14:26:13.053: E/AndroidRuntime(278): Caused by: java.lang.NullPointerException 10-18 14:26:13.053: E/AndroidRuntime(278): at com.example.shareslab.MessageList.onCreate(MessageList.java:107) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 10-18 14:26:13.053: E/AndroidRuntime(278): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) </code></pre> <p>my activity is here</p> <pre><code>package com.example.shareslab; import java.util.ArrayList; import java.util.Arrays; import com.example.shareslab.R; import android.app.Dialog; import android.app.ListActivity; import android.app.LocalActivityManager; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TabHost; import android.widget.TabHost.TabSpec; import android.widget.TextView; public class MessageList extends ListActivity { LocalActivityManager mLocalActivityManager; public static String singleDescription; public static String title,URLToPost,imageURL; public static ArrayList&lt;String&gt; galleryImages; private static class EfficientAdapter extends BaseAdapter { private LayoutInflater mInflater; public EfficientAdapter(Context context) { mInflater = LayoutInflater.from(context); } @Override public int getCount() { System.out.println("description COUNT : "+SplashActivity.description.size()); return SplashActivity.description.size(); } @Override public Object getItem(int position) { return position; } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = mInflater.inflate(R.layout.inflate_list_item, null); holder = new ViewHolder(); holder.title = (TextView) convertView.findViewById(R.id.inflate_title); holder.des = (TextView) convertView.findViewById(R.id.inflate_description); holder.im= (ImageView) convertView.findViewById(R.id.inflate_image); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } UrlImageViewHelper.setUrlDrawable(holder.im, SplashActivity.imageURLAmit.get(position),null); holder.title.setText(SplashActivity.titles.get(position)); holder.des.setText(SplashActivity.description.get(position)); return convertView; } public static class ViewHolder { TextView title,des; ImageView im; } } // close class Efficent adapter @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); ListView listView = getListView(); listView.setTextFilterEnabled(true); this.setListAdapter(new EfficientAdapter(this)); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { // When clicked, show a toast with the TextView text galleryImages=new ArrayList&lt;String&gt;(); singleDescription=SplashActivity.description.get(position); title=SplashActivity.titles.get(position); URLToPost=SplashActivity.link.get(position); imageURL=SplashActivity.imageURLAmit.get(position); System.out.println("ON CLICK URL: "+URLToPost); galleryImages.addAll(Arrays.asList(SplashActivity.arrays[position])); startActivity(new Intent(MessageList.this,MessageListDetail.class)); } }); TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost); mLocalActivityManager = new LocalActivityManager(this, false); tabHost.setup(mLocalActivityManager); mLocalActivityManager.dispatchCreate(icicle); //after the tab's setup is called, you have to call this or it wont work TabHost.TabSpec spec; Intent intent; tabHost.getTabWidget().setDividerDrawable(R.drawable.tab_divider); intent = new Intent().setClass(this, Home.class); spec = tabHost.newTabSpec("tagname1").setIndicator("HOME").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, SocialMedia.class); spec = tabHost.newTabSpec("tagname2").setIndicator("SOCIAL MEDIA").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, Tech.class); spec = tabHost.newTabSpec("tagname3").setIndicator("TECH").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, USWorld.class); spec = tabHost.newTabSpec("tagname4").setIndicator("US &amp; WORLD").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, Business.class); spec = tabHost.newTabSpec("tagname5").setIndicator("BUSINESS").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, Fashion.class); spec = tabHost.newTabSpec("tagname6").setIndicator("FASHION").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, People.class); spec = tabHost.newTabSpec("tagname7").setIndicator("PEOPLE").setContent(intent); tabHost.addTab(spec); intent = new Intent().setClass(this, Political.class); spec = tabHost.newTabSpec("tagname8").setIndicator("POLITICAL").setContent(intent); tabHost.addTab(spec); } @Override protected void onPause() { super.onPause(); mLocalActivityManager.dispatchPause(isFinishing()); //you have to manually dispatch the pause msg } @Override protected void onResume() { super.onResume(); mLocalActivityManager.dispatchResume(); //you have to manually dispatch the resume msg } private static View createTabView(final Context context, final String text) { View view = LayoutInflater.from(context).inflate(R.layout.tabs_bg, null); TextView tv = (TextView) view.findViewById(R.id.tabsText); tv.setText(text); return view; } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser1755834
    1. USuser1755834
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COcan you please provide more logcat error info...
      singulars
      1. POAndroid: Get error java.lang.NullPointerException
      1. USJackson Chengalai
    2. COwhat's the code at line no 127?
      singulars
      1. POAndroid: Get error java.lang.NullPointerException
      1. USHardik Nadiyapara
    3. CO@jackson i have edit my qustion u can see full logcat..
      singulars
      1. POAndroid: Get error java.lang.NullPointerException
      1. USuser1755834
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload