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POListview - NullPointerException at setAdapter
 

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  1. POListview - NullPointerException at setAdapter
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    <p>I am getting NullPointerException at setAdapter in my listview. I would really appreciate it if someone could help me out. My files are as follows:</p> <p>MainActivity.java</p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Create the adapter that will return a fragment for each of the three // primary sections of the app. mSectionsPagerAdapter = new SectionsPagerAdapter( getSupportFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); MainActivityContext=this; callGeolocationApi1(); ListView categoryList = (ListView) this.findViewById(R.id.listView); CategoryAdapter categoryAdapter = new CategoryAdapter(this, R.layout.category2_row_layout, getCategoriesList()); //java.lang.NullPointerException occurs here categoryList.setAdapter(categoryAdapter); } private List&lt;String&gt; getCategoriesList() { List&lt;String&gt; strlist = new ArrayList&lt;String&gt;(); strlist.add("str1"); strlist.add("str2"); return strlist; } </code></pre> <p>fragment_main_dummy.xml</p> <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;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" android:background="@color/orange" tools:context=".MainActivity"&gt; &lt;ListView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/listView" android:layout_gravity="center" tools:listitem="@layout/category2_row_layout"/&gt; </code></pre> <p></p> <p>category2_row_layout.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="6dip" android:background="#00000000"&gt; &lt;TextView android:id="@+id/category_name" android:layout_width="200dip" android:layout_height="wrap_content" android:textSize="20sp" android:layout_marginTop="10dip" android:scrollbars="vertical" android:fadingEdge="vertical" android:layout_alignParentLeft="true" android:background="#00000000" /&gt; &lt;ImageButton android:id="@+id/category_delete_button" android:background="#00000000" android:src="@drawable/settings" android:layout_width="50dip" android:layout_height="50dip" android:scrollbars="vertical" android:fadingEdge="vertical" android:layout_alignParentRight="true" android:focusable="false" android:focusableInTouchMode="false" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Logcat - <a href="http://pastebin.com/phLYcPC8" rel="nofollow">http://pastebin.com/phLYcPC8</a></p>
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    1. This table or related slice is empty.
    1. PTQuestion
    1. USGaurav
    1. USGaurav
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    1. This table or related slice is empty.
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    1. COMay be a dupe of http://stackoverflow.com/questions/6960678/nullpointerexception-with-listview-and-setadapter?rq=1
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      1. POListview - NullPointerException at setAdapter
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    2. COCzułe you add logcat?
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      1. POListview - NullPointerException at setAdapter
      1. USArturSkowronski
    3. COyou are `passing activity_main` layout to `setContentView` but ListView is in `fragment_main_dummy` layout as you have posted with question so make sure you are using right layout for Current Activity or Fragment
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      1. POListview - NullPointerException at setAdapter
      1. USρяσѕρєя K
 

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