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POAndroid : getting NullPointerException for ImageView imag = (ImageView) findViewById(R.id.image)
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  1. POAndroid : getting NullPointerException for ImageView imag = (ImageView) findViewById(R.id.image)
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    copied!<p>I am getting Null Pointer Exception for ImageView imag = (ImageView) findViewById(R.id.image). I have custome layout declared in <strong>R.layout.screen3</strong> with custome list declared in <strong>R.layout.custom_row_screen3</strong>. Each row has few tasks and depending on their status an image is shown to right of each row.</p> <p>Please guide me in getting this resolved as I am new to android.</p> <p>here is my code below :::</p> <pre><code>public class screen3 extends ListActivity{ final ArrayList&lt;HashMap&lt;String, String&gt;&gt; list = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); ... ... ... TextView tv; ImageView imag; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.screen3); System.out.println("Screen3"); ... ... ... SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.custom_row_screen3, new String[] { "tname","schedule", "note", "time"}, new int[] { R.id.text1Screen3task, R.id.text2Screen3task, R.id.text3Screen3task, R.id.text4Screen3task}); populateList(); setListAdapter(adapter); } public void populateList() { for(int i = 0; i &lt;numberOfTasks; i++) { HashMap&lt;String, String&gt; h = new HashMap&lt;String, String&gt;(); HashMap&lt;String, String&gt; hm = new HashMap&lt;String, String&gt;(); h = tasks.get(i); ... ... hm.put("tname", h.get("taskName")); hm.put("schedule", h.get("STime")+" - "+h.get("ETime")); if(h.get("taskStatus").trim().equals("1")){ imag = (ImageView) findViewById(R.id.image);// &lt;&lt;---- NULL RETURNED imag.setImageResource(R.drawable.done); ... ... } else{ imag = (ImageView) findViewById(R.id.image);// &lt;&lt;---- NULL RETURNED imag.setImageResource(R.drawable.not); ... ... } list.add(hm); } ... ... } </code></pre> <p><strong>screen3 xml</strong> </p> <pre><code>&lt;ListView android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#000000" android:drawSelectorOnTop="false"&gt; &lt;/ListView&gt; </code></pre> <p></p> <p><strong>custom_row_screen3 xml</strong> </p> <pre><code>&lt;LinearLayout android:orientation="vertical" android:layout_width="0dip" android:layout_weight="1" android:layout_height="wrap_content"&gt; &lt;TextView android:id="@+id/text1Screen3task" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="21sp" android:textStyle="bold" android:gravity="clip_horizontal" /&gt; &lt;TextView android:id="@+id/text2Screen3task" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="16sp" android:gravity="clip_horizontal" /&gt; &lt;TextView android:id="@+id/text3Screen3task" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="16sp" android:gravity="clip_horizontal" /&gt; &lt;TextView android:id="@+id/text4Screen3task" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="16sp" android:gravity="clip_horizontal" /&gt; &lt;/LinearLayout&gt; &lt;ImageView android:id="@+id/image" android:layout_width="wrap_content" android:paddingBottom="51dip" android:layout_height="wrap_content" android:layout_marginRight="16dip" /&gt; </code></pre> <p></p> <p>Thanks Abhinav Tyagi</p>
 

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