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PONullPointerException when using View from findViewById
 

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    <p>I have designed an android application where, I want to view a menu after the splash screen. I trigger it correctly and I use an <code>ArrayAdapter</code> to create a custom <code>ListView</code>. but, when I run the module, it closes after the splash and the logcat indicate a <code>NullPointerException</code>. but, I have not done anything wrong as I knw. please help me out! :)</p> <p>Thank You. </p> <p><strong>Code:</strong></p> <pre><code>package com.sliit.droidman.main; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.sliit.droidman.R; public class MainActivity extends Activity implements OnItemClickListener{ ArrayList&lt;String&gt; Methods = new ArrayList&lt;String&gt;(); ArrayList&lt;String&gt; MethodDiscription = new ArrayList&lt;String&gt;(); ArrayList&lt;Integer&gt; Icons = new ArrayList&lt;Integer&gt;(); ArrayList&lt;Object&gt; Objects = new ArrayList&lt;Object&gt;(); private ListItemAdapter adapter; ListView lv; public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int position, long arg3) { Toast.makeText( this, "Title =&gt; " + Methods.get(position) + "=&gt; n Description" + MethodDiscription.get(position), Toast.LENGTH_SHORT).show(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_menu); lv = (ListView) findViewById(R.layout.main_menu); fillArrayList(); lv.setOnItemClickListener(this); } public void RefreshListView() { Objects.clear(); for (int i = 0; i &lt; Methods.size(); i++) { Object obj = new Object(); Objects.add(obj); } Log.d("object array", "" + Objects.size()); adapter = new ListItemAdapter(Objects, 1); lv.setAdapter(adapter); } private class ListItemAdapter extends ArrayAdapter&lt;Object&gt;{ ViewHolder HolderView; public ListItemAdapter(List&lt;Object&gt; Item, int ID) { super(MainActivity.this, R.layout.listitem_row , Item); } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflator = getLayoutInflater(); convertView = inflator.inflate(R.layout.listitem_row, null); HolderView = new ViewHolder(); HolderView.AppEvent = (TextView) convertView.findViewById(R.id.Event); HolderView.EventDisc = (TextView) convertView.findViewById(R.id.EventDescription); HolderView.iv = (ImageView) convertView.findViewById(R.id.avatar); convertView.setTag(HolderView); HolderView.AppEvent.setText(Methods.get(position)); HolderView.EventDisc.setText(MethodDiscription.get(position)); HolderView.iv.setBackgroundResource(Icons.get(position)); return convertView; } private class ViewHolder { TextView AppEvent; TextView EventDisc; ImageView iv; } } public void fillArrayList() { Methods.clear(); MethodDiscription.clear(); Icons.clear(); Methods.add(0,"Applications"); Methods.add(1,"System Resources"); Methods.add(2,"Statistics"); Methods.add(3,"Threats"); MethodDiscription.add(0, "bla bla bla"); MethodDiscription.add(1, "bla bla bla"); MethodDiscription.add(2, "bla bla bla"); MethodDiscription.add(3, "bla bla bla"); Icons.add(0, R.drawable.ic_launcher); Icons.add(1, R.drawable.ic_launcher); Icons.add(2, R.drawable.ic_launcher); Icons.add(3, R.drawable.ic_launcher); } } </code></pre> <p>The logCat from the place where the error occurred:</p> <pre><code>07-05 01:44:50.678: W/dalvikvm(1907): threadid=1: thread exiting with uncaught exception (group=0x40a13300) 07-05 01:44:50.728: E/AndroidRuntime(1907): FATAL EXCEPTION: main 07-05 01:44:50.728: E/AndroidRuntime(1907): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sliit.droidman/com.sliit.droidman.main.MainActivity}: java.lang.NullPointerException 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread.access$600(ActivityThread.java:130) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.os.Handler.dispatchMessage(Handler.java:99) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.os.Looper.loop(Looper.java:137) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread.main(ActivityThread.java:4745) 07-05 01:44:50.728: E/AndroidRuntime(1907): at java.lang.reflect.Method.invokeNative(Native Method) 07-05 01:44:50.728: E/AndroidRuntime(1907): at java.lang.reflect.Method.invoke(Method.java:511) 07-05 01:44:50.728: E/AndroidRuntime(1907): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 07-05 01:44:50.728: E/AndroidRuntime(1907): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 07-05 01:44:50.728: E/AndroidRuntime(1907): at dalvik.system.NativeStart.main(Native Method) 07-05 01:44:50.728: E/AndroidRuntime(1907): Caused by: java.lang.NullPointerException 07-05 01:44:50.728: E/AndroidRuntime(1907): at com.sliit.droidman.main.MainActivity.onCreate(MainActivity.java:47) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.Activity.performCreate(Activity.java:5008) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 07-05 01:44:50.728: E/AndroidRuntime(1907): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 07-05 01:44:50.728: E/AndroidRuntime(1907): ... 11 more </code></pre>
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    1. USuser2864740
    1. USImesh Chandrasiri
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    1. COPost your LogCat please.
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      1. USgsb
    2. COIt's a piece of bad code.
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      1. USpawelzieba
    3. COCan you please tell me which is the bad code!
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      1. USImesh Chandrasiri
 

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