[android-developers] Re: Null pointer exception when finding views by Id
Thanks for the help. I finally just trashed both the xml and class
files and rewrote then. It works now, I think it had to do with the
DatePicker. Thanks for the help.
KaiPing
On Mar 28, 8:07 pm, Peli <[EMAIL PROTECTED]> wrote:
> Which is the line that causes the null-pointer exception? The code
> lines you posted surely don't as they just assign the values. How do
> you know that the values are 'null' in onCreate()?
> What is in EditTransaction.java:47 ?
>
> Peli
>
> On Mar 28, 12:38 pm,kaiping<[EMAIL PROTECTED]> wrote:
>
> > OK, Did that and it still has the same error
>
> > On Mar 27, 11:43 pm, Peli <[EMAIL PROTECTED]> wrote:
>
> > > Sometimes R.java is corrupted. It helps to clean everything either
> > > from within Eclipse or manually (delete bin/ and R.java) and rebuild
> > > from scratch.
>
> > > Peli
>
> > > On Mar 27, 2:44 pm,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > > I am sure, Actually the R.id.account_name was a type I forgot to fix.
> > > > But, even the once that are in there return null.
>
> > > > On Mar 27, 12:16 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > > Are you sure ALL the findViewById return null? This one does for sure:
> > > > > mDescription = (EditText) findViewById(R.id.account_name); since there
> > > > > is no account_name id in your layout.
>
> > > > > On Mar 26, 6:19 am,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > > > > Thanks for the idea. I have confirmed that the file is named
> > > > > > transaction_edit.xml.
>
> > > > > > On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > > > > Well, he needs to have the filename be transaction_edit.xml. Not
> > > > > > > sure
> > > > > > > if it is.
>
> > > > > > > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > > > > > > Don't you need to name your layout "transaction_edit" in the
> > > > > > > > XML file?
>
> > > > > > > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > > > > > > Hi, For one of my Activities All the findViewById() function
> > > > > > > > > returns
> > > > > > > > > is null. I am really astonished by this behaviour because
> > > > > > > > > this same
> > > > > > > > > function works fine in other parts of my application. I have
> > > > > > > > > posted
> > > > > > > > > the code below. If anybody has any ideas that would be great
> > > > > > > > > thanks,
>
> > > > > > > > > Josh
>
> > > > > > > > > package com.jingsys.money;
>
> > > > > > > > > import java.util.ArrayList;
>
> > > > > > > > > import android.app.Activity;
> > > > > > > > > import android.database.Cursor;
> > > > > > > > > import android.os.Bundle;
> > > > > > > > > import android.widget.ArrayAdapter;
> > > > > > > > > import android.widget.DatePicker;
> > > > > > > > > import android.widget.EditText;
> > > > > > > > > import android.widget.Spinner;
>
> > > > > > > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > > > > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > > > > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > > > > > > public class EditTransaction extends Activity {
>
> > > > > > > > >private DatePicker mDate;
> > > > > > > > >private EditText mDescription;
> > > > > > > > >private EditText mNumber;
> > > > > > > > >private EditText mAmount;
> > > > > > > > >private Spinner mFromAccount;
> > > > > > > > >private Spinner mToAccount;
> > > > > > > > >private EditText mComments;
>
> > > > > > > > >private TransactionDbAdapter transData;
> > > > > > > > >private AccountsDbAdapter accountData;
>
> > > > > > > > >private Cursor mFrom;
> > > > > > > > >private Cursor mTo;
>
> > > > > > > > >@Override
> > > > > > > > >protected void onCreate(Bundle icicle) {
> > > > > > > > >super.onCreate(icicle);
> > > > > > > > >setContentView(R.layout.transaction_edit);
>
> > > > > > > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > > > > > > >mDescription = (EditText)
> > > > > > > > > findViewById(R.id.account_name);
> > > > > > > > >mNumber = (EditText)
> > > > > > > > > findViewById(R.id.trans_number);
> > > > > > > > >mAmount = (EditText)
> > > > > > > > > findViewById(R.id.trans_amount);
> > > > > > > > >mComments = (EditText)
> > > > > > > > > findViewById(R.id.trans_comments);
>
> > > > > > > > >mFromAccount = (Spinner)
> > > > > > > > > findViewById(R.id.trans_from);
> > > > > > > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > > > > > > XML file
> > > > > > > > >
> > > > > > > > > > > > > > > > > xmlns:android="http://schemas.android.com/apk/res/
> > > > > > > > > android"
> > > > > > > > >android:layout_width="fill_parent"
> > > > > > > > >android:layout_height="fill_parent"
> > > > > > > > >android:stretchColumns="1">
> > > > > > > > >
> > > > > > > > > > > > > > > > >android:layout_height="wrap_conten
[android-developers] Re: Null pointer exception when finding views by Id
Which is the line that causes the null-pointer exception? The code
lines you posted surely don't as they just assign the values. How do
you know that the values are 'null' in onCreate()?
What is in EditTransaction.java:47 ?
Peli
On Mar 28, 12:38 pm, kaiping <[EMAIL PROTECTED]> wrote:
> OK, Did that and it still has the same error
>
> On Mar 27, 11:43 pm, Peli <[EMAIL PROTECTED]> wrote:
>
> > Sometimes R.java is corrupted. It helps to clean everything either
> > from within Eclipse or manually (delete bin/ and R.java) and rebuild
> > from scratch.
>
> > Peli
>
> > On Mar 27, 2:44 pm,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > I am sure, Actually the R.id.account_name was a type I forgot to fix.
> > > But, even the once that are in there return null.
>
> > > On Mar 27, 12:16 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > Are you sure ALL the findViewById return null? This one does for sure:
> > > > mDescription = (EditText) findViewById(R.id.account_name); since there
> > > > is no account_name id in your layout.
>
> > > > On Mar 26, 6:19 am,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > > > Thanks for the idea. I have confirmed that the file is named
> > > > > transaction_edit.xml.
>
> > > > > On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > > > Well, he needs to have the filename be transaction_edit.xml. Not
> > > > > > sure
> > > > > > if it is.
>
> > > > > > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > > > > > Don't you need to name your layout "transaction_edit" in the XML
> > > > > > > file?
>
> > > > > > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > > > > > Hi, For one of my Activities All the findViewById() function
> > > > > > > > returns
> > > > > > > > is null. I am really astonished by this behaviour because this
> > > > > > > > same
> > > > > > > > function works fine in other parts of my application. I have
> > > > > > > > posted
> > > > > > > > the code below. If anybody has any ideas that would be great
> > > > > > > > thanks,
>
> > > > > > > > Josh
>
> > > > > > > > package com.jingsys.money;
>
> > > > > > > > import java.util.ArrayList;
>
> > > > > > > > import android.app.Activity;
> > > > > > > > import android.database.Cursor;
> > > > > > > > import android.os.Bundle;
> > > > > > > > import android.widget.ArrayAdapter;
> > > > > > > > import android.widget.DatePicker;
> > > > > > > > import android.widget.EditText;
> > > > > > > > import android.widget.Spinner;
>
> > > > > > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > > > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > > > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > > > > > public class EditTransaction extends Activity {
>
> > > > > > > >private DatePicker mDate;
> > > > > > > >private EditText mDescription;
> > > > > > > >private EditText mNumber;
> > > > > > > >private EditText mAmount;
> > > > > > > >private Spinner mFromAccount;
> > > > > > > >private Spinner mToAccount;
> > > > > > > >private EditText mComments;
>
> > > > > > > >private TransactionDbAdapter transData;
> > > > > > > >private AccountsDbAdapter accountData;
>
> > > > > > > >private Cursor mFrom;
> > > > > > > >private Cursor mTo;
>
> > > > > > > >@Override
> > > > > > > >protected void onCreate(Bundle icicle) {
> > > > > > > >super.onCreate(icicle);
> > > > > > > >setContentView(R.layout.transaction_edit);
>
> > > > > > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > > > > > >mDescription = (EditText)
> > > > > > > > findViewById(R.id.account_name);
> > > > > > > >mNumber = (EditText) findViewById(R.id.trans_number);
> > > > > > > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > > > > > > >mComments = (EditText)
> > > > > > > > findViewById(R.id.trans_comments);
>
> > > > > > > >mFromAccount = (Spinner)
> > > > > > > > findViewById(R.id.trans_from);
> > > > > > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > > > > > XML file
> > > > > > > >
> > > > > > > > http://schemas.android.com/apk/res/
> > > > > > > > android"
> > > > > > > >android:layout_width="fill_parent"
> > > > > > > >android:layout_height="fill_parent"
> > > > > > > >android:stretchColumns="1">
> > > > > > > >
> > > > > > > > > > > > > > >android:layout_height="wrap_content"
> > > > > > > >android:text="@string/transaction_date" />
> > > > > > > > > > > > > > > android:layout_width="wrap_content"
> > > > > > > >android:layout_height="wrap_content" />
> > > > > > > >
>
> > > > > > > >
> > > > > > > > > > > > > > >android:layout_height="wrap_content"
> > > > > > > >
> > > > > > > > android:text="@string/transaction_descri
[android-developers] Re: Null pointer exception when finding views by Id
OK, Did that and it still has the same error
On Mar 27, 11:43 pm, Peli <[EMAIL PROTECTED]> wrote:
> Sometimes R.java is corrupted. It helps to clean everything either
> from within Eclipse or manually (delete bin/ and R.java) and rebuild
> from scratch.
>
> Peli
>
> On Mar 27, 2:44 pm,kaiping<[EMAIL PROTECTED]> wrote:
>
> > I am sure, Actually the R.id.account_name was a type I forgot to fix.
> > But, even the once that are in there return null.
>
> > On Mar 27, 12:16 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > Are you sure ALL the findViewById return null? This one does for sure:
> > > mDescription = (EditText) findViewById(R.id.account_name); since there
> > > is no account_name id in your layout.
>
> > > On Mar 26, 6:19 am,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > > Thanks for the idea. I have confirmed that the file is named
> > > > transaction_edit.xml.
>
> > > > On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > > Well, he needs to have the filename be transaction_edit.xml. Not sure
> > > > > if it is.
>
> > > > > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > > > > Don't you need to name your layout "transaction_edit" in the XML
> > > > > > file?
>
> > > > > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > > > > Hi, For one of my Activities All the findViewById() function
> > > > > > > returns
> > > > > > > is null. I am really astonished by this behaviour because this
> > > > > > > same
> > > > > > > function works fine in other parts of my application. I have
> > > > > > > posted
> > > > > > > the code below. If anybody has any ideas that would be great
> > > > > > > thanks,
>
> > > > > > > Josh
>
> > > > > > > package com.jingsys.money;
>
> > > > > > > import java.util.ArrayList;
>
> > > > > > > import android.app.Activity;
> > > > > > > import android.database.Cursor;
> > > > > > > import android.os.Bundle;
> > > > > > > import android.widget.ArrayAdapter;
> > > > > > > import android.widget.DatePicker;
> > > > > > > import android.widget.EditText;
> > > > > > > import android.widget.Spinner;
>
> > > > > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > > > > public class EditTransaction extends Activity {
>
> > > > > > >private DatePicker mDate;
> > > > > > >private EditText mDescription;
> > > > > > >private EditText mNumber;
> > > > > > >private EditText mAmount;
> > > > > > >private Spinner mFromAccount;
> > > > > > >private Spinner mToAccount;
> > > > > > >private EditText mComments;
>
> > > > > > >private TransactionDbAdapter transData;
> > > > > > >private AccountsDbAdapter accountData;
>
> > > > > > >private Cursor mFrom;
> > > > > > >private Cursor mTo;
>
> > > > > > >@Override
> > > > > > >protected void onCreate(Bundle icicle) {
> > > > > > >super.onCreate(icicle);
> > > > > > >setContentView(R.layout.transaction_edit);
>
> > > > > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > > > > >mDescription = (EditText)
> > > > > > > findViewById(R.id.account_name);
> > > > > > >mNumber = (EditText) findViewById(R.id.trans_number);
> > > > > > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > > > > > >mComments = (EditText)
> > > > > > > findViewById(R.id.trans_comments);
>
> > > > > > >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> > > > > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > > > > XML file
> > > > > > >
> > > > > > > http://schemas.android.com/apk/res/
> > > > > > > android"
> > > > > > >android:layout_width="fill_parent"
> > > > > > >android:layout_height="fill_parent"
> > > > > > >android:stretchColumns="1">
> > > > > > >
> > > > > > > > > > > > >android:layout_height="wrap_content"
> > > > > > >android:text="@string/transaction_date" />
> > > > > > > > > > > > > android:layout_width="wrap_content"
> > > > > > >android:layout_height="wrap_content" />
> > > > > > >
>
> > > > > > >
> > > > > > > > > > > > >android:layout_height="wrap_content"
> > > > > > >android:text="@string/transaction_description"
> > > > > > > />
> > > > > > > > > > > > >android:layout_width="wrap_content"
> > > > > > >android:layout_height="wrap_content"/>
> > > > > > >
>
> > > > > > >
> > > > > > > > > > > > >android:layout_height="wrap_content"
> > > > > > >android:text="@string/transaction_number"/>
> > > > > > > > > > > > >android:layout_width="wrap_content"
> > > > > > >
[android-developers] Re: Null pointer exception when finding views by Id
Sometimes R.java is corrupted. It helps to clean everything either
from within Eclipse or manually (delete bin/ and R.java) and rebuild
from scratch.
Peli
On Mar 27, 2:44 pm, kaiping <[EMAIL PROTECTED]> wrote:
> I am sure, Actually the R.id.account_name was a type I forgot to fix.
> But, even the once that are in there return null.
>
> On Mar 27, 12:16 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > Are you sure ALL the findViewById return null? This one does for sure:
> > mDescription = (EditText) findViewById(R.id.account_name); since there
> > is no account_name id in your layout.
>
> > On Mar 26, 6:19 am,kaiping<[EMAIL PROTECTED]> wrote:
>
> > > Thanks for the idea. I have confirmed that the file is named
> > > transaction_edit.xml.
>
> > > On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > > Well, he needs to have the filename be transaction_edit.xml. Not sure
> > > > if it is.
>
> > > > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > > > Don't you need to name your layout "transaction_edit" in the XML file?
>
> > > > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > > > Hi, For one of my Activities All the findViewById() function returns
> > > > > > is null. I am really astonished by this behaviour because this same
> > > > > > function works fine in other parts of my application. I have posted
> > > > > > the code below. If anybody has any ideas that would be great
> > > > > > thanks,
>
> > > > > > Josh
>
> > > > > > package com.jingsys.money;
>
> > > > > > import java.util.ArrayList;
>
> > > > > > import android.app.Activity;
> > > > > > import android.database.Cursor;
> > > > > > import android.os.Bundle;
> > > > > > import android.widget.ArrayAdapter;
> > > > > > import android.widget.DatePicker;
> > > > > > import android.widget.EditText;
> > > > > > import android.widget.Spinner;
>
> > > > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > > > public class EditTransaction extends Activity {
>
> > > > > >private DatePicker mDate;
> > > > > >private EditText mDescription;
> > > > > >private EditText mNumber;
> > > > > >private EditText mAmount;
> > > > > >private Spinner mFromAccount;
> > > > > >private Spinner mToAccount;
> > > > > >private EditText mComments;
>
> > > > > >private TransactionDbAdapter transData;
> > > > > >private AccountsDbAdapter accountData;
>
> > > > > >private Cursor mFrom;
> > > > > >private Cursor mTo;
>
> > > > > >@Override
> > > > > >protected void onCreate(Bundle icicle) {
> > > > > >super.onCreate(icicle);
> > > > > >setContentView(R.layout.transaction_edit);
>
> > > > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > > > >mDescription = (EditText)
> > > > > > findViewById(R.id.account_name);
> > > > > >mNumber = (EditText) findViewById(R.id.trans_number);
> > > > > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > > > > >mComments = (EditText) findViewById(R.id.trans_comments);
>
> > > > > >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> > > > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > > > XML file
> > > > > >
> > > > > > http://schemas.android.com/apk/res/
> > > > > > android"
> > > > > >android:layout_width="fill_parent"
> > > > > >android:layout_height="fill_parent"
> > > > > >android:stretchColumns="1">
> > > > > >
> > > > > > > > > > >android:layout_height="wrap_content"
> > > > > >android:text="@string/transaction_date" />
> > > > > > > > > > > android:layout_width="wrap_content"
> > > > > >android:layout_height="wrap_content" />
> > > > > >
>
> > > > > >
> > > > > > > > > > >android:layout_height="wrap_content"
> > > > > >android:text="@string/transaction_description" />
> > > > > > > > > > >android:layout_width="wrap_content"
> > > > > >android:layout_height="wrap_content"/>
> > > > > >
>
> > > > > >
> > > > > > > > > > >android:layout_height="wrap_content"
> > > > > >android:text="@string/transaction_number"/>
> > > > > > > > > > >android:layout_width="wrap_content"
> > > > > >android:layout_height="wrap_content"/>
> > > > > >
>
> > > > > >
> > > > > > > > > > >android:layout_height="wrap_content"
> > > > > >android:text="@string/transaction_amount"/>
> > > > > > > > > > >android:layout_width="wrap_content"
> > > > > >and
[android-developers] Re: Null pointer exception when finding views by Id
I am sure, Actually the R.id.account_name was a type I forgot to fix.
But, even the once that are in there return null.
On Mar 27, 12:16 am, "Dan U." <[EMAIL PROTECTED]> wrote:
> Are you sure ALL the findViewById return null? This one does for sure:
> mDescription = (EditText) findViewById(R.id.account_name); since there
> is no account_name id in your layout.
>
> On Mar 26, 6:19 am,kaiping<[EMAIL PROTECTED]> wrote:
>
> > Thanks for the idea. I have confirmed that the file is named
> > transaction_edit.xml.
>
> > On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > > Well, he needs to have the filename be transaction_edit.xml. Not sure
> > > if it is.
>
> > > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > > Don't you need to name your layout "transaction_edit" in the XML file?
>
> > > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > > Hi, For one of my Activities All the findViewById() function returns
> > > > > is null. I am really astonished by this behaviour because this same
> > > > > function works fine in other parts of my application. I have posted
> > > > > the code below. If anybody has any ideas that would be great thanks,
>
> > > > > Josh
>
> > > > > package com.jingsys.money;
>
> > > > > import java.util.ArrayList;
>
> > > > > import android.app.Activity;
> > > > > import android.database.Cursor;
> > > > > import android.os.Bundle;
> > > > > import android.widget.ArrayAdapter;
> > > > > import android.widget.DatePicker;
> > > > > import android.widget.EditText;
> > > > > import android.widget.Spinner;
>
> > > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > > public class EditTransaction extends Activity {
>
> > > > >private DatePicker mDate;
> > > > >private EditText mDescription;
> > > > >private EditText mNumber;
> > > > >private EditText mAmount;
> > > > >private Spinner mFromAccount;
> > > > >private Spinner mToAccount;
> > > > >private EditText mComments;
>
> > > > >private TransactionDbAdapter transData;
> > > > >private AccountsDbAdapter accountData;
>
> > > > >private Cursor mFrom;
> > > > >private Cursor mTo;
>
> > > > >@Override
> > > > >protected void onCreate(Bundle icicle) {
> > > > >super.onCreate(icicle);
> > > > >setContentView(R.layout.transaction_edit);
>
> > > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > > >mDescription = (EditText) findViewById(R.id.account_name);
> > > > >mNumber = (EditText) findViewById(R.id.trans_number);
> > > > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > > > >mComments = (EditText) findViewById(R.id.trans_comments);
>
> > > > >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> > > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > > XML file
> > > > >
> > > > > http://schemas.android.com/apk/res/
> > > > > android"
> > > > >android:layout_width="fill_parent"
> > > > >android:layout_height="fill_parent"
> > > > >android:stretchColumns="1">
> > > > >
> > > > > > > > >android:layout_height="wrap_content"
> > > > >android:text="@string/transaction_date" />
> > > > > > > > > android:layout_width="wrap_content"
> > > > >android:layout_height="wrap_content" />
> > > > >
>
> > > > >
> > > > > > > > >android:layout_height="wrap_content"
> > > > >android:text="@string/transaction_description" />
> > > > > > > > >android:layout_width="wrap_content"
> > > > >android:layout_height="wrap_content"/>
> > > > >
>
> > > > >
> > > > > > > > >android:layout_height="wrap_content"
> > > > >android:text="@string/transaction_number"/>
> > > > > > > > >android:layout_width="wrap_content"
> > > > >android:layout_height="wrap_content"/>
> > > > >
>
> > > > >
> > > > > > > > >android:layout_height="wrap_content"
> > > > >android:text="@string/transaction_amount"/>
> > > > > > > > >android:layout_width="wrap_content"
> > > > >android:layout_height="wrap_content"/>
> > > > >
>
> > > > >
> > > > > > > > >android:layout_height="wrap_content"
> > > > >android:text="@string/transaction_from"/>
> > > > > > > > >android:layout_width="wrap_content"
> > > > >android:layout_height="fill_parent"/>
> > > > >
>
> > > > >
> > > > >
[android-developers] Re: Null pointer exception when finding views by Id
Are you sure ALL the findViewById return null? This one does for sure:
mDescription = (EditText) findViewById(R.id.account_name); since there
is no account_name id in your layout.
On Mar 26, 6:19 am, kaiping <[EMAIL PROTECTED]> wrote:
> Thanks for the idea. I have confirmed that the file is named
> transaction_edit.xml.
>
> On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
>
> > Well, he needs to have the filename be transaction_edit.xml. Not sure
> > if it is.
>
> > On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > > Don't you need to name your layout "transaction_edit" in the XML file?
>
> > > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > > Hi, For one of my Activities All the findViewById() function returns
> > > > is null. I am really astonished by this behaviour because this same
> > > > function works fine in other parts of my application. I have posted
> > > > the code below. If anybody has any ideas that would be great thanks,
>
> > > > Josh
>
> > > > package com.jingsys.money;
>
> > > > import java.util.ArrayList;
>
> > > > import android.app.Activity;
> > > > import android.database.Cursor;
> > > > import android.os.Bundle;
> > > > import android.widget.ArrayAdapter;
> > > > import android.widget.DatePicker;
> > > > import android.widget.EditText;
> > > > import android.widget.Spinner;
>
> > > > import com.jingsys.money.data.AccountsDbAdapter;
> > > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > > public class EditTransaction extends Activity {
>
> > > >private DatePicker mDate;
> > > >private EditText mDescription;
> > > >private EditText mNumber;
> > > >private EditText mAmount;
> > > >private Spinner mFromAccount;
> > > >private Spinner mToAccount;
> > > >private EditText mComments;
>
> > > >private TransactionDbAdapter transData;
> > > >private AccountsDbAdapter accountData;
>
> > > >private Cursor mFrom;
> > > >private Cursor mTo;
>
> > > >@Override
> > > >protected void onCreate(Bundle icicle) {
> > > >super.onCreate(icicle);
> > > >setContentView(R.layout.transaction_edit);
>
> > > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > > >mDescription = (EditText) findViewById(R.id.account_name);
> > > >mNumber = (EditText) findViewById(R.id.trans_number);
> > > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > > >mComments = (EditText) findViewById(R.id.trans_comments);
>
> > > >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> > > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > > XML file
> > > >
> > > > http://schemas.android.com/apk/res/
> > > > android"
> > > >android:layout_width="fill_parent"
> > > >android:layout_height="fill_parent"
> > > >android:stretchColumns="1">
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_date" />
> > > > > > > android:layout_width="wrap_content"
> > > >android:layout_height="wrap_content" />
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_description" />
> > > > > > >android:layout_width="wrap_content"
> > > >android:layout_height="wrap_content"/>
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_number"/>
> > > > > > >android:layout_width="wrap_content"
> > > >android:layout_height="wrap_content"/>
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_amount"/>
> > > > > > >android:layout_width="wrap_content"
> > > >android:layout_height="wrap_content"/>
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_from"/>
> > > > > > >android:layout_width="wrap_content"
> > > >android:layout_height="fill_parent"/>
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content"
> > > >android:text="@string/transaction_to"/>
> > > > > > >android:layout_width="wrap_content"
> > > >android:layout_height="fill_parent"/>
> > > >
>
> > > >
> > > > > > >android:layout_height="wrap_content
[android-developers] Re: Null pointer exception when finding views by Id
Thanks for the idea. I have confirmed that the file is named
transaction_edit.xml.
On Mar 26, 3:54 am, "Dan U." <[EMAIL PROTECTED]> wrote:
> Well, he needs to have the filename be transaction_edit.xml. Not sure
> if it is.
>
> On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
>
> > Don't you need to name your layout "transaction_edit" in the XML file?
>
> > On Mar 25, 2008, at 5:26 AM,kaipingwrote:
>
> > > Hi, For one of my Activities All the findViewById() function returns
> > > is null. I am really astonished by this behaviour because this same
> > > function works fine in other parts of my application. I have posted
> > > the code below. If anybody has any ideas that would be great thanks,
>
> > > Josh
>
> > > package com.jingsys.money;
>
> > > import java.util.ArrayList;
>
> > > import android.app.Activity;
> > > import android.database.Cursor;
> > > import android.os.Bundle;
> > > import android.widget.ArrayAdapter;
> > > import android.widget.DatePicker;
> > > import android.widget.EditText;
> > > import android.widget.Spinner;
>
> > > import com.jingsys.money.data.AccountsDbAdapter;
> > > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > > import com.jingsys.money.data.TransactionDbAdapter;
>
> > > public class EditTransaction extends Activity {
>
> > >private DatePicker mDate;
> > >private EditText mDescription;
> > >private EditText mNumber;
> > >private EditText mAmount;
> > >private Spinner mFromAccount;
> > >private Spinner mToAccount;
> > >private EditText mComments;
>
> > >private TransactionDbAdapter transData;
> > >private AccountsDbAdapter accountData;
>
> > >private Cursor mFrom;
> > >private Cursor mTo;
>
> > >@Override
> > >protected void onCreate(Bundle icicle) {
> > >super.onCreate(icicle);
> > >setContentView(R.layout.transaction_edit);
>
> > >mDate = (DatePicker) findViewById(R.id.trans_date);
> > >mDescription = (EditText) findViewById(R.id.account_name);
> > >mNumber = (EditText) findViewById(R.id.trans_number);
> > >mAmount = (EditText) findViewById(R.id.trans_amount);
> > >mComments = (EditText) findViewById(R.id.trans_comments);
>
> > >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> > >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > > XML file
> > >
> > > http://schemas.android.com/apk/res/
> > > android"
> > >android:layout_width="fill_parent"
> > >android:layout_height="fill_parent"
> > >android:stretchColumns="1">
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_date" />
> > > > > android:layout_width="wrap_content"
> > >android:layout_height="wrap_content" />
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_description" />
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="wrap_content"/>
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_number"/>
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="wrap_content"/>
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_amount"/>
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="wrap_content"/>
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_from"/>
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="fill_parent"/>
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_to"/>
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="fill_parent"/>
> > >
>
> > >
> > > > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_comments"/>
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="fill_parent"/>
> > >
>
> > >
> > > > >android:layout_width="wrap_content"
> > >android:layout_height="wrap_content"
> > >android:text="@string/transaction_add"/>
> > >
[android-developers] Re: Null pointer exception when finding views by Id
Well, he needs to have the filename be transaction_edit.xml. Not sure
if it is.
On Mar 25, 5:29 am, Rick Genter <[EMAIL PROTECTED]> wrote:
> Don't you need to name your layout "transaction_edit" in the XML file?
>
> On Mar 25, 2008, at 5:26 AM, kaiping wrote:
>
>
>
>
>
> > Hi, For one of my Activities All the findViewById() function returns
> > is null. I am really astonished by this behaviour because this same
> > function works fine in other parts of my application. I have posted
> > the code below. If anybody has any ideas that would be great thanks,
>
> > Josh
>
> > package com.jingsys.money;
>
> > import java.util.ArrayList;
>
> > import android.app.Activity;
> > import android.database.Cursor;
> > import android.os.Bundle;
> > import android.widget.ArrayAdapter;
> > import android.widget.DatePicker;
> > import android.widget.EditText;
> > import android.widget.Spinner;
>
> > import com.jingsys.money.data.AccountsDbAdapter;
> > import com.jingsys.money.data.MoneyDbAdapterFactory;
> > import com.jingsys.money.data.TransactionDbAdapter;
>
> > public class EditTransaction extends Activity {
>
> >private DatePicker mDate;
> >private EditText mDescription;
> >private EditText mNumber;
> >private EditText mAmount;
> >private Spinner mFromAccount;
> >private Spinner mToAccount;
> >private EditText mComments;
>
> >private TransactionDbAdapter transData;
> >private AccountsDbAdapter accountData;
>
> >private Cursor mFrom;
> >private Cursor mTo;
>
> >@Override
> >protected void onCreate(Bundle icicle) {
> >super.onCreate(icicle);
> >setContentView(R.layout.transaction_edit);
>
> >mDate = (DatePicker) findViewById(R.id.trans_date);
> >mDescription = (EditText) findViewById(R.id.account_name);
> >mNumber = (EditText) findViewById(R.id.trans_number);
> >mAmount = (EditText) findViewById(R.id.trans_amount);
> >mComments = (EditText) findViewById(R.id.trans_comments);
>
> >mFromAccount = (Spinner) findViewById(R.id.trans_from);
> >mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> > XML file
> >
> > http://schemas.android.com/apk/res/
> > android"
> >android:layout_width="fill_parent"
> >android:layout_height="fill_parent"
> >android:stretchColumns="1">
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_date" />
> > > android:layout_width="wrap_content"
> >android:layout_height="wrap_content" />
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_description" />
> > >android:layout_width="wrap_content"
> >android:layout_height="wrap_content"/>
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_number"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="wrap_content"/>
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_amount"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="wrap_content"/>
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_from"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="fill_parent"/>
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_to"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="fill_parent"/>
> >
>
> >
> > >android:layout_height="wrap_content"
> >android:text="@string/transaction_comments"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="fill_parent"/>
> >
>
> >
> > >android:layout_width="wrap_content"
> >android:layout_height="wrap_content"
> >android:text="@string/transaction_add"/>
> > >android:layout_width="wrap_content"
> >android:layout_height="wrap_content"
> >android:text="@string/transaction_clear"/>
> >
>
> >
>
> > Exception:
> > E/AndroidRuntime( 805): Uncaught handler: thread Main exiting due to
> > uncaught exception
> > E/AndroidRuntime( 805): java.lang.Runt
[android-developers] Re: Null pointer exception when finding views by Id
Don't you need to name your layout "transaction_edit" in the XML file?
On Mar 25, 2008, at 5:26 AM, kaiping wrote:
>
> Hi, For one of my Activities All the findViewById() function returns
> is null. I am really astonished by this behaviour because this same
> function works fine in other parts of my application. I have posted
> the code below. If anybody has any ideas that would be great thanks,
>
> Josh
>
> package com.jingsys.money;
>
> import java.util.ArrayList;
>
> import android.app.Activity;
> import android.database.Cursor;
> import android.os.Bundle;
> import android.widget.ArrayAdapter;
> import android.widget.DatePicker;
> import android.widget.EditText;
> import android.widget.Spinner;
>
> import com.jingsys.money.data.AccountsDbAdapter;
> import com.jingsys.money.data.MoneyDbAdapterFactory;
> import com.jingsys.money.data.TransactionDbAdapter;
>
> public class EditTransaction extends Activity {
>
> private DatePicker mDate;
> private EditText mDescription;
> private EditText mNumber;
> private EditText mAmount;
> private Spinner mFromAccount;
> private Spinner mToAccount;
> private EditText mComments;
>
> private TransactionDbAdapter transData;
> private AccountsDbAdapter accountData;
>
> private Cursor mFrom;
> private Cursor mTo;
>
> @Override
> protected void onCreate(Bundle icicle) {
> super.onCreate(icicle);
> setContentView(R.layout.transaction_edit);
>
> mDate = (DatePicker) findViewById(R.id.trans_date);
> mDescription = (EditText) findViewById(R.id.account_name);
> mNumber = (EditText) findViewById(R.id.trans_number);
> mAmount = (EditText) findViewById(R.id.trans_amount);
> mComments = (EditText) findViewById(R.id.trans_comments);
>
> mFromAccount = (Spinner) findViewById(R.id.trans_from);
> mToAccount = (Spinner) findViewById(R.id.trans_to);
>
> XML file
>
> http://schemas.android.com/apk/res/
> android"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:stretchColumns="1">
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_date" />
>android:layout_width="wrap_content"
> android:layout_height="wrap_content" />
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_description" />
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"/>
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_number"/>
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"/>
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_amount"/>
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"/>
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_from"/>
> android:layout_width="wrap_content"
> android:layout_height="fill_parent"/>
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_to"/>
> android:layout_width="wrap_content"
> android:layout_height="fill_parent"/>
>
>
>
> android:layout_height="wrap_content"
> android:text="@string/transaction_comments"/>
> android:layout_width="wrap_content"
> android:layout_height="fill_parent"/>
>
>
>
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="@string/transaction_add"/>
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="@string/transaction_clear"/>
>
>
>
>
>
> Exception:
> E/AndroidRuntime( 805): Uncaught handler: thread Main exiting due to
> uncaught exception
> E/AndroidRuntime( 805): java.lang.RuntimeException: Unable to start
> activity ComponentInfo{com.jingsys.money/
> com.jingsys.money.EditTransaction}: ja
