Develop Reference

ContextMenu Fails To Remove A Row From A ListView With A Custom Adapter

The Problem is: My ContextMenu Fails to Remove a Row from a ListView with a Custom Adapter and the app crashes with a NullPointerException, see Logcat output.
I have done Google searches and searched stackoverflow. None of the information I have found solves this problem.
My Question is: What is wrong with my code?
Please provide the correct code to solve this problem.
Java Code: class TestActivity
public class TestActivity extends ListActivity {
private String itemNameArray[];
private String dateArray[];
private ListView listview;
CustomListViewAdapter customListViewAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
registerForContextMenu(getListView());
root = Environment.getExternalStorageDirectory() + File.separator + "/ListTestFiles";
getDir(root);
listview = getListView();
name=itemNameArray;
lastmod=dateArray;
CustomListViewAdapter customListViewAdapter = new CustomListViewAdapter(this, name, lastmod);
listview.setAdapter(customListViewAdapter);
} // End of onCreate code.
class CustomListViewAdapter extends ArrayAdapter<String> {
Context context;
String[] nameArray;
String[] modifiedArray;
CustomListViewAdapter(Context c, String[] name, String[] lastmod)
{
super(c, R.layout.layout_item_view, R.id.rowtext, name);
this.context = c;
this.nameArray = name;
this.modifiedArray = lastmod;
}
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.layout_item_view, parent, false);
TextView myName;
TextView myLastMod;
myName=(TextView) row.findViewById(R.id.rowtext);
myName.setText(nameArray[position]);
myLastMod=(TextView) row.findViewById(R.id.textView6);
myLastMod.setText(modifiedArray[position]);
return row;
}
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem itemMenu) {
final AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)itemMenu.getMenuInfo();
switch (itemMenu.getItemId()) {
case R.id.context_menu_rename:
Toast.makeText(this, "Rename", Toast.LENGTH_SHORT).show();
return true;
case R.id.context_menu_delete:
// NOTE TESTING the line of code below caused a runtime error: java.lang.NullPointerException
customListViewAdapter.remove(customListViewAdapter.getItem(info.position));
customListViewAdapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "position = " + info.position, Toast.LENGTH_SHORT).show();
Toast.makeText(this, "Delete", Toast.LENGTH_SHORT).show();
return true;
return super.onContextItemSelected(itemMenu);
}
}
}
Logcat output:
11-12 12:46:59.965 14265-14265/com.testing.listapp D/AndroidRuntime﹕ Shutting down VM
--------- beginning of crash
11-12 12:46:59.981 14265-14265/com.testing.listapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.testing.listapp, PID: 14265
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.testing.listapp.TestActivity$CustomListViewAdapter.remove(java.lang.Object)' on a null object reference
at com.testing.listapp.TestActivity.onContextItemSelected(TestActivity.java:5454)
at android.app.Activity.onMenuItemSelected(Activity.java:2905)
at com.android.internal.policy.impl.PhoneWindow$DialogMenuCallback.onMenuItemSelected(PhoneWindow.java:4701)
at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:761)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:904)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:894)
at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:167)
at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:1082)
at android.widget.AdapterView.performItemClick(AdapterView.java:305)
at android.widget.AbsListView.performItemClick(AbsListView.java:1146)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3053)
at android.widget.AbsListView$3.run(AbsListView.java:3860)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Logcat output #2 :
11-13 10:45:21.229 21432-21432/com.testing.listapp D/AndroidRuntime﹕ Shutting down VM
--------- beginning of crash
11-13 10:45:21.246 21432-21432/com.testing.listapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.testing.listapp, PID: 21432
java.lang.UnsupportedOperationException
at java.util.AbstractList.remove(AbstractList.java:638)
at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:75)
at java.util.AbstractCollection.remove(AbstractCollection.java:229)
at android.widget.ArrayAdapter.remove(ArrayAdapter.java:244)
at com.testing.listapp.TestActivity.onContextItemSelected(TestActivity.java:5468)
at android.app.Activity.onMenuItemSelected(Activity.java:2905)
at com.android.internal.policy.impl.PhoneWindow$DialogMenuCallback.onMenuItemSelected(PhoneWindow.java:4701)
at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:761)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:904)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:894)
at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:167)
at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:1082)
at android.widget.AdapterView.performItemClick(AdapterView.java:305)
at android.widget.AbsListView.performItemClick(AbsListView.java:1146)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3053)
at android.widget.AbsListView$3.run(AbsListView.java:3860)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Try to change the line
CustomListViewAdapter customListViewAdapter = new CustomListViewAdapter(this, name, lastmod);
to:
customListViewAdapter = new CustomListViewAdapter(this, name, lastmod);
just curious if is the local variable, anyway the instance variable CustomListViewAdapter has been initialized.
Have a look to the famous SO post that usually is given when there are NPE

I initialize a TextView before runtime because the views are not set yet

I write this counter but when I lunch the app get crashed I don't now where the error some help and thank you tell where is the Error here or how can I do code in right way
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
TextView txt = (TextView)findViewById(R.id.textView);
count i;
public void bu1(View view) {
starrtime();
}
public void bu2(View view) {
i.cancel();
}
void starrtime(){
i = new count(100,1000);
i.start();
}
public class count extends CountDownTimer {
public count(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
#Override
public void onTick(long millisUntilFinished) {
txt.setText(String.valueOf(millisUntilFinished));
}
#Override
public void onFinish() {
txt.setText("Done");
}
}
}
this my log cat
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.kira.counter, PID: 4598
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.kira.counter/com.example.kira.counter.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.support.v7.app.AppCompatDelegateImplBase.(AppCompatDelegateImplBase.java:116)
at android.support.v7.app.AppCompatDelegateImplV9.(AppCompatDelegateImplV9.java:147)
at android.support.v7.app.AppCompatDelegateImplV11.(AppCompatDelegateImplV11.java:27)
at android.support.v7.app.AppCompatDelegateImplV14.(AppCompatDelegateImplV14.java:50)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:201)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:181)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:521)
at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:190)
at com.example.kira.counter.MainActivity.(MainActivity.java:23)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2101)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
at android.app.ActivityThread.access$800(ActivityThread.java:135) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5001) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
at dalvik.system.NativeStart.main(Native Method) 

I believe you can not initialize a TextView before runtime because the views are not set yet. Classes should be capitalized. Try this.
public class MainActivity extends AppCompatActivity{
private TextView txt;
private Count i;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt = (TextView)findViewById(R.id.textView);
}
}

app crashes when creating view (android.view.InflateException)

public class ChildrensList extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.childrens_list,container,false);
//return rootView;
ImageButton pigsButton = (ImageButton) rootView.findViewById(R.id.pigsButton);
ImageButton jackButton = (ImageButton) rootView.findViewById(R.id.jacksButton);
ImageButton hansgretButton = (ImageButton) rootView.findViewById(R.id.hansgretButton);
ImageButton mermadButton = (ImageButton) rootView.findViewById(R.id.mermaidButton);
ImageButton rapButton = (ImageButton) rootView.findViewById(R.id.rapunzalButton);
ImageButton redRidButton = (ImageButton) rootView.findViewById(R.id.ridingButton);
ImageButton threeBearsButton = (ImageButton) rootView.findViewById(R.id.bearsButton);
ImageButton ugduckButton = (ImageButton) rootView.findViewById(R.id.duckButton);
final MediaPlayer mp = MediaPlayer.create(getContext(), R.raw.xlophone);
pigsButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(),pigs_story.class);
mp.start();
startActivity(i);
}
});
jackButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), jack_beanstalk.class);
mp.start();
startActivity(i);
}
});
hansgretButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), hansel_and_gretal.class);
mp.start();
startActivity(i);
}
});
mermadButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), mermaid.class);
mp.start();
startActivity(i);
}
});
rapButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), rapunzal.class);
mp.start();
startActivity(i);
}
});
redRidButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), RedRidingHood.class);
mp.start();
startActivity(i);
}
});
threeBearsButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), ThreeBears.class);
mp.start();
startActivity(i);
}
});
ugduckButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChildrensList.this.getActivity(), UglyDuckling.class);
mp.start();
startActivity(i);
}
});
return rootView; //return rootview
}
}
I am having some errors appear in the console and struggling with how to resolve them, one of them is a fatal out of memory exception but there is a long list! could someone shed some light on this and help to rid the errors
04-19 18:47:29.392 19101-19101/com.j2d.com.bedtimestories E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.j2d.com.bedtimestories, PID: 19101
android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class android.widget.ScrollView
at android.view.LayoutInflater.inflate(LayoutInflater.java:551)
at android.view.LayoutInflater.inflate(LayoutInflater.java:429)
at com.j2d.com.bedtimestories.ChildrensList.onCreateView(ChildrensList.java:25)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.widget.ScrollView
at android.view.LayoutInflater.createView(LayoutInflater.java:657)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:706)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:774)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:716)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:429) 
at com.j2d.com.bedtimestories.ChildrensList.onCreateView(ChildrensList.java:25) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:158) 
at android.app.ActivityThread.main(ActivityThread.java:7224) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:631)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:706) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:774) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:716) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:498) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:429) 
at com.j2d.com.bedtimestories.ChildrensList.onCreateView(ChildrensList.java:25) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:158) 
at android.app.ActivityThread.main(ActivityThread.java:7224) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 22075212 byte allocation with 16777216 free bytes and 17MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:856)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:675)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:2228)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:4211)
at android.content.res.Resources.loadDrawable(Resources.java:4085)
at android.content.res.Resources.loadDrawable(Resources.java:3935)
at android.content.res.TypedArray.getDrawable(TypedArray.java:886)
at android.view.View.<init>(View.java:4225)
at android.view.ViewGroup.<init>(ViewGroup.java:589)
at android.widget.FrameLayout.<init>(FrameLayout.java:97)
at android.widget.ScrollView.<init>(ScrollView.java:347)
at android.widget.ScrollView.<init>(ScrollView.java:343)
at android.widget.ScrollView.<init>(ScrollView.java:339)
at java.lang.reflect.Constructor.newInstance(Native Method) 
at android.view.LayoutInflater.createView(LayoutInflater.java:631) 
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:706) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:774) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:716) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:498) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:429) 
at com.j2d.com.bedtimestories.ChildrensList.onCreateView(ChildrensList.java:25) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:158) 
at android.app.ActivityThread.main(ActivityThread.java:7224) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 

The key part of the error you posted is this:
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 22075212 byte allocation with 16777216 free bytes and 17MB until OOM
[...]
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:856)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:675)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:2228)
[...]
at android.view.LayoutInflater.inflate(LayoutInflater.java:429) 
at com.j2d.com.bedtimestories.ChildrensList.onCreateView(ChildrensList.java:25) 
[...]
This says your app ran out of memory. It ran out of memory while trying to load an image, which it did when your ChildrensList class, in the onCreateView() method, called .inflate().
As someone else noted in a comment on your question, it is likely that you have very large image file(s) in your app. You should scale the images to an appropriate size to avoid this issue.
The Android documentation has an article discussing image sizes.

TabHost NullPointerException using ActionBarSherlock

I’m using Sherlock library and I want to create a tab in my app but I’m getting a NullPointerException; what am I doing wrong?
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.bonsitesherlock/com.example.bonsitesherlock.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2077)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104)
at android.app.ActivityThread.access$600(ActivityThread.java:134)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4624)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.widget.TabHost.addTab(TabHost.java:229)
at com.example.bonsitesherlock.MainActivity.addTab(MainActivity.java:49)
at com.example.bonsitesherlock.MainActivity.setTabs(MainActivity.java:32)
at com.example.bonsitesherlock.MainActivity.onCreate(MainActivity.java:27)
at android.app.Activity.performCreate(Activity.java:4479)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2041)
... 11 more
This is my MainActivity:
public class MainActivity extends SherlockActivity {
private TabHost mTabHost;
ProgressDialog pDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTabHost = (TabHost)findViewById(android.R.id.tabhost);
setTabs();
}
private void setTabs()
{
addTab("", R.drawable.tab_news, News.class);
addTab("", R.drawable.tab_servises, News.class);
addTab("", R.drawable.tab_profile, News.class);
}
private void addTab(String labelId, int drawableId, Class<?> c)
{
Intent intent = new Intent(getApplicationContext(), c);
TabHost.TabSpec spec = mTabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, mTabHost.getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
mTabHost.addTab(spec);
}
}

Fetch data from database SQLite with fragment

This is my fragment activity i am getting error while accessing database my code is :-
public class Test extends Fragment {
View view;
private Cursor c;
private final String DB = "Canary";
private SQLiteDatabase db2;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.test, container, false);
Button b = (Button) view.findViewById(R.id.test_button);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getActivity(),"Listning",Toast.LENGTH_LONG).show();
}
});
db2 = SQLiteDatabase.openOrCreateDatabase(DB, null);
Log.d("Lee", "working her1");
c=db2.rawQuery("SELECT * FROM business_master", null);
Log.d("Lee", "working here2");
c.moveToFirst();
String id=c.getString(c.getColumnIndex("id"));
Log.d("id", "" + id);
String email=c.getString(c.getColumnIndex("email"));
Log.d("email", email);
String password=c.getString(c.getColumnIndex("password"));
db2.close();
return view;
} }
The error i am getting :-
01-20 11:35:57.168 17081-17081/com.purplefront.canary E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.purplefront.canary, PID: 17081
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:709)
at com.purplefront.canary.Test.onCreateView(Test.java:36)
at android.app.Fragment.performCreateView(Fragment.java:1700)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
at android.app.BackStackRecord.run(BackStackRecord.java:684)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
If i remove the database access it will work fine as expected but i need database access in fragment only.
Any help would be appreciated.