i have face this error,i cant found the solution please
help.Application is based on listview Activity.when u click on one
listview item then it ll go to another listview.second activity start
but ther is some error please help yr...this error ......
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
07-27 15:38:48.117: WARN/dalvikvm(741): threadid=3: thread exiting
with uncaught exception (group=0x4000fe70)
07-27 15:38:48.127: ERROR/AndroidRuntime(741): Uncaught handler:
thread main exiting due to uncaught exception
07-27 15:38:48.147: ERROR/AndroidRuntime(741):
java.lang.RuntimeException: Unable to stop activity
{com.vigyaapan.Exercise/com.vigyaapan.Exercise.GymExercise}:
java.lang.NullPointerException
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread.performStopActivityInner
(ActivityThread.java:2905)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread.handleStopActivity(ActivityThread.java:
2948)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread.access$2100(ActivityThread.java:112)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1708)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.os.Handler.dispatchMessage(Handler.java:99)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.os.Looper.loop(Looper.java:123)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread.main(ActivityThread.java:3948)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
java.lang.reflect.Method.invokeNative(Native Method)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
java.lang.reflect.Method.invoke(Method.java:521)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:782)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
dalvik.system.NativeStart.main(Native Method)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): Caused by:
java.lang.NullPointerException
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.Activity.performStop(Activity.java:3575)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): at
android.app.ActivityThread.performStopActivityInner
(ActivityThread.java:2902)
07-27 15:38:48.147: ERROR/AndroidRuntime(741): ... 11 more
------------------------------------------------------------------------------------------------------------------------------------------------
here is my program
-------------------------------------------
package com.vigyaapan.Exercise;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.AndroidRuntimeException;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class GymExercise extends ListActivity
{
DBExercise dbExercise = new DBExercise(this);
Cursor cursor;
String aryListMainMenu[];
int intGetSelectedItem = 0;
protected ListView lv;
public void onCreate(Bundle savedInstanceState)
{
try
{
super.onCreate(savedInstanceState);
dbExercise.openDataBase();
dbExercise.getTricepDipImage();
aryListMainMenu = dbExercise.displayMainMenu();
startManagingCursor(cursor);
if(dbExercise != null)
dbExercise.close();
setContentView(R.layout.main);
lv = (ListView)this.findViewById(android.R.id.list);
setupListView();
}
catch(NullPointerException e)
{
e.printStackTrace();
}
}
private void setupListView()
{
try
{
ArrayAdapter listItemAdapter = new ArrayAdapter
(this,android.R.layout.simple_list_item_1,aryListMainMenu);
lv.setAdapter(listItemAdapter);
}
catch(AndroidRuntimeException e)
{
e.printStackTrace();
}
}
@Override
protected void onListItemClick(ListView l, View v, int position,
long id)
{
try
{
super.onListItemClick(l, v, position, id);
if(position == 0)
{
Intent intentShoulder = new Intent
(GymExercise.this,ShoulderViewController.class);
startActivity(intentShoulder);
lv.bringToFront();
}
if(position == 1)
{
Intent intentTriceps = new Intent
(GymExercise.this,TricepsViewController.class);
startActivity(intentTriceps);
}
if(position == 2)
{
Intent intentBiceps = new Intent
(GymExercise.this,BicepsViewController.class);
startActivity(intentBiceps);
}
if(position == 3)
{
Intent intentChest = new Intent
(GymExercise.this,ChestViewController.class);
startActivity(intentChest);
}
if(position == 4)
{
Intent intentBackView = new Intent
(GymExercise.this,BackViewController.class);
startActivity(intentBackView);
}
if(position == 5)
{
Intent intentLeg = new Intent
(GymExercise.this,LegViewController.class);
startActivity(intentLeg);
}
}
catch(AndroidRuntimeException e)
{
e.printStackTrace();
}
}
}
---------------------------------------------------------------------------------------------------------------
package com.vigyaapan.Exercise;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class TricepsViewController extends ListActivity
{
DBExercise dbExercise = new DBExercise(this);
protected ListView lv;
String[] aryTricepsList;
public void onCreate(Bundle savedInstanceState)
{
try
{
super.onCreate(savedInstanceState);
System.out.println("Inside Triceps class");
dbExercise.openDataBase();
aryTricepsList = dbExercise.getTriceps();
if(dbExercise != null)
dbExercise.close();
setContentView(R.layout.triceps);
lv = (ListView)this.findViewById(android.R.id.list);
setTricepsList();
}
catch(RuntimeException e)
{
e.printStackTrace();
}
}
/*
* This method will get the populated values from database an load
into list view of triceps list
*/
public void setTricepsList()
{
try
{
ArrayAdapter listItemAdapter = new ArrayAdapter
(this,android.R.layout.simple_list_item_1,aryTricepsList);
System.out.println("Array
count===>"+listItemAdapter.getCount());
lv.setAdapter(listItemAdapter);
}
catch(RuntimeException e)
{
e.printStackTrace();
}
}
}
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