Re: [android-developers] Re: list - need suggestion

2010-01-27 Thread android beginner 
Hi,
The basic list that I want to view is working.

In my first list activity(ListDemoActivity), I choosed some element, which
triggers another list A activity. If I go back (on pressing BACK key), the
state of ListDemoActivity screen is preserved. Now If I select the same
element again, I expect the state of A activity to be preserved aswell, but
its not happening.

Below is the code snippet, Can you please suggest me what I need to do?

public class ListDemoActivity extends ListActivity {
String[] firstPage = {a, b, c, d, e};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

setListAdapter(new ArrayAdapterString(this,
android.R.layout.simple_list_item_1,
firstPage));

}

public void onListItemClick(ListView parent, View v,
int position, long id)
{
String txt = firstPage[position];
if ((txt == a) ||
(txt == b))
{
Intent startActivity = new Intent(this, Activity_A.class);
startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

startActivity(startActivity);
}
else
{
Intent startActivity = new Intent(this, Activity_B.class);
startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

startActivity(startActivity);
}

}
}

On Tue, Jan 26, 2010 at 5:28 PM, theSmith chris.smith...@gmail.com wrote:


 On Jan 25, 11:48 pm, android beginner android.beginne...@gmail.com
 wrote:
  so, each sub-lists should be created as list activity. On selecting any
  item, should call that particular list activity. Is my understanding
  correct?

 Yes

  Also, how to store parent list in the stack? so that on pressing escape
  key, I can navigate backwards.

 Android does this automatically, and I assume you mean the 'back'
 key.  Each new activity is launched ontop of the older ones allowing
 you to navigate backwards down the stack.

 -theSmith



  Thanks
 
  On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun bsaad1...@gmail.com
 wrote:
 
   your item must be a listactivity , when you add it to your parent
   list , the UI is adapted automaticly .
 
   On 25 jan, 06:24, android beginner android.beginne...@gmail.com
   wrote:
 Hi,
 
My Activity has list of items and on clicking any item, new window
 with
different set of list has to appear and this can continue upto 4 or 5
   level
depths. I need your expert advice on how to achieve this.
 
Can I have each sub-list to be of separate activity? If there are any
   online
examples matching this requirement, please let me know.
 
Thank
 
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Re: [android-developers] Re: list - need suggestion

2010-01-27 Thread Jason Proctor 
first off, use String.equals() to compare the contents of strings, 
not ==. the == operator checks for object reference equality. this 
isn't what you want, unless you use intern() throughout, which i 
wouldn't recommend.





Hi,
The basic list that I want to view is working.

In my first list activity(ListDemoActivity), I choosed some element, 
which triggers another list A activity. If I go back (on pressing 
BACK key), the state of ListDemoActivity screen is preserved. Now 
If I select the same element again, I expect the state of A activity 
to be preserved aswell, but its not happening.


Below is the code snippet, Can you please suggest me what I need to do?

public class ListDemoActivity extends ListActivity {
String[] firstPage = {a, b, c, d, e};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
  
setListAdapter(new ArrayAdapterString(this,

android.R.layout.simple_list_item_1,
firstPage));
  
}
  
public void onListItemClick(ListView parent, View v,

int position, long id)
{
String txt = firstPage[position];
if ((txt == a) ||
(txt == b))
{   
Intent startActivity = new Intent(this, Activity_A.class);

startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
   
startActivity(startActivity);   
}

else
{   
Intent startActivity = new Intent(this, Activity_B.class);

startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
   
startActivity(startActivity); 
}
   
}

}

On Tue, Jan 26, 2010 at 5:28 PM, theSmith 
mailto:chris.smith...@gmail.comchris.smith...@gmail.com wrote:



On Jan 25, 11:48 pm, android beginner 
mailto:android.beginne...@gmail.comandroid.beginne...@gmail.com

wrote:

  so, each sub-lists should be created as list activity. On selecting any

 item, should call that particular list activity. Is my understanding
 correct?


Yes



 Also, how to store parent list in the stack? so that on pressing escape
 key, I can navigate backwards.


Android does this automatically, and I assume you mean the 'back'
key.  Each new activity is launched ontop of the older ones allowing
you to navigate backwards down the stack.

-theSmith




 Thanks

 On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun 
mailto:bsaad1...@gmail.combsaad1...@gmail.comwrote:


 

  your item must be a listactivity , when you add it to your parent
  list , the UI is adapted automaticly .

  On 25 jan, 06:24, android beginner 
mailto:android.beginne...@gmail.comandroid.beginne...@gmail.com

  wrote:
Hi,

   My Activity has list of items and on clicking any item, new window with
   different set of list has to appear and this can continue upto 4 or 5
  level
   depths. I need your expert advice on how to achieve this.

   Can I have each sub-list to be of separate activity? If there are any
  online
   examples matching this requirement, please let me know.

   Thank

  --
  You received this message because you are subscribed to the Google
  Groups Android Developers group.
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To

[android-developers] Re: list - need suggestion

2010-01-27 Thread theSmith 


On Jan 27, 7:03 pm, android beginner android.beginne...@gmail.com
wrote:
 Hi,
 The basic list that I want to view is working.

 In my first list activity(ListDemoActivity), I choosed some element, which
 triggers another list A activity. If I go back (on pressing BACK key), the
 state of ListDemoActivity screen is preserved. Now If I select the same
 element again, I expect the state of A activity to be preserved aswell, but
 its not happening.

You're assuming things that are not true.  Its an activity stack, so
once you pop it off (hit the back key) that state is lost, and you
will be creating a new activity when launching that activity A again.

I'd recommend learning a little bit about the nature of android before
getting too deep into developing code.
The Androidology videos will get you started and the Google I/O videos
are some of my favorites for getting into Android as a pro.
http://developer.android.com/intl/de/videos/index.html#v=opZ69P-0Jbc


 Below is the code snippet, Can you please suggest me what I need to do?

 public class ListDemoActivity extends ListActivity {
     String[] firstPage = {a, b, c, d, e};
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         setListAdapter(new ArrayAdapterString(this,
                         android.R.layout.simple_list_item_1,
                         firstPage));

     }

     public void onListItemClick(ListView parent, View v,
                                 int position, long id)
     {
         String txt = firstPage[position];
         if ((txt == a) ||
             (txt == b))
         {
             Intent startActivity = new Intent(this, Activity_A.class);
             startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

             startActivity(startActivity);
         }
         else
         {
             Intent startActivity = new Intent(this, Activity_B.class);
             startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

             startActivity(startActivity);
         }

     }

 }
 On Tue, Jan 26, 2010 at 5:28 PM, theSmith chris.smith...@gmail.com wrote:

  On Jan 25, 11:48 pm, android beginner android.beginne...@gmail.com
  wrote:
   so, each sub-lists should be created as list activity. On selecting any
   item, should call that particular list activity. Is my understanding
   correct?

  Yes

   Also, how to store parent list in the stack? so that on pressing escape
   key, I can navigate backwards.

  Android does this automatically, and I assume you mean the 'back'
  key.  Each new activity is launched ontop of the older ones allowing
  you to navigate backwards down the stack.

  -theSmith

   Thanks

   On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun bsaad1...@gmail.com
  wrote:

your item must be a listactivity , when you add it to your parent
list , the UI is adapted automaticly .

On 25 jan, 06:24, android beginner android.beginne...@gmail.com
wrote:
  Hi,

 My Activity has list of items and on clicking any item, new window
  with
 different set of list has to appear and this can continue upto 4 or 5
level
 depths. I need your expert advice on how to achieve this.

 Can I have each sub-list to be of separate activity? If there are any
online
 examples matching this requirement, please let me know.

 Thank

--
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Groups Android Developers group.
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  android-developers@googlegroups.com
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For more options, visit this group at
   http://groups.google.com/group/android-developers?hl=en

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Re: [android-developers] Re: list - need suggestion

2010-01-27 Thread android beginner 
Yea, went through the document and got good understanding of activities 
tasks.

I observed one issue though (Not sure if its an issue, maybe I need to call
some other functions).

In my first list A, I selected one item using Keys. This leads to create
another list Activity B. I just browsed the list using Key, so that one
element will be highlighted (focussed). These activities are created with
Launch mode singleTop
Then I went to the Home Screen. Now on selecting my Activity Icon again, I
got the list Activity B screen but its not highlighted. Using onPause, I got
the position and in onResume I called setSelection(position). But still
that element in the list is not highlighted

Any Suggestions?

Thanks

On Thu, Jan 28, 2010 at 11:52 AM, theSmith chris.smith...@gmail.com wrote:



 On Jan 27, 7:03 pm, android beginner android.beginne...@gmail.com
 wrote:
  Hi,
  The basic list that I want to view is working.
 
  In my first list activity(ListDemoActivity), I choosed some element,
 which
  triggers another list A activity. If I go back (on pressing BACK key),
 the
  state of ListDemoActivity screen is preserved. Now If I select the same
  element again, I expect the state of A activity to be preserved aswell,
 but
  its not happening.

 You're assuming things that are not true.  Its an activity stack, so
 once you pop it off (hit the back key) that state is lost, and you
 will be creating a new activity when launching that activity A again.

 I'd recommend learning a little bit about the nature of android before
 getting too deep into developing code.
 The Androidology videos will get you started and the Google I/O videos
 are some of my favorites for getting into Android as a pro.
 http://developer.android.com/intl/de/videos/index.html#v=opZ69P-0Jbc


  Below is the code snippet, Can you please suggest me what I need to do?
 
  public class ListDemoActivity extends ListActivity {
  String[] firstPage = {a, b, c, d, e};
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
 
  setListAdapter(new ArrayAdapterString(this,
  android.R.layout.simple_list_item_1,
  firstPage));
 
  }
 
  public void onListItemClick(ListView parent, View v,
  int position, long id)
  {
  String txt = firstPage[position];
  if ((txt == a) ||
  (txt == b))
  {
  Intent startActivity = new Intent(this, Activity_A.class);
  startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
  startActivity(startActivity);
  }
  else
  {
  Intent startActivity = new Intent(this, Activity_B.class);
  startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
  startActivity(startActivity);
  }
 
  }
 
  }
  On Tue, Jan 26, 2010 at 5:28 PM, theSmith chris.smith...@gmail.com
 wrote:
 
   On Jan 25, 11:48 pm, android beginner android.beginne...@gmail.com
   wrote:
so, each sub-lists should be created as list activity. On selecting
 any
item, should call that particular list activity. Is my understanding
correct?
 
   Yes
 
Also, how to store parent list in the stack? so that on pressing
 escape
key, I can navigate backwards.
 
   Android does this automatically, and I assume you mean the 'back'
   key.  Each new activity is launched ontop of the older ones allowing
   you to navigate backwards down the stack.
 
   -theSmith
 
Thanks
 
On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun 
 bsaad1...@gmail.com
   wrote:
 
 your item must be a listactivity , when you add it to your parent
 list , the UI is adapted automaticly .
 
 On 25 jan, 06:24, android beginner android.beginne...@gmail.com
 wrote:
   Hi,
 
  My Activity has list of items and on clicking any item, new
 window
   with
  different set of list has to appear and this can continue upto 4
 or 5
 level
  depths. I need your expert advice on how to achieve this.
 
  Can I have each sub-list to be of separate activity? If there are
 any
 online
  examples matching this requirement, please let me know.
 
  Thank
 
 --
 You received this message because you are subscribed to the Google
 Groups Android Developers group.
 To post to this group, send email to
   android-developers@googlegroups.com
 To unsubscribe from this group, send email to
 android-developers+unsubscr...@googlegroups.comandroid-developers%2bunsubscr...@googlegroups.com
 android-developers%2bunsubscr...@googlegroups.comandroid-developers%252bunsubscr...@googlegroups.com
 
   android-developers%2bunsubscr...@googlegroups.comandroid-developers%252bunsubscr...@googlegroups.com

Re: [android-developers] Re: list - need suggestion

2010-01-27 Thread android beginner 
Yes. Because of touch mode, I didn't get the focus. Since my hardware doesnt
have the the touch screen, it should not be an issue :)

On Thu, Jan 28, 2010 at 3:23 PM, android beginner 
android.beginne...@gmail.com wrote:

 Yea, went through the document and got good understanding of activities 
 tasks.

 I observed one issue though (Not sure if its an issue, maybe I need to call
 some other functions).

 In my first list A, I selected one item using Keys. This leads to create
 another list Activity B. I just browsed the list using Key, so that one
 element will be highlighted (focussed). These activities are created with
 Launch mode singleTop
 Then I went to the Home Screen. Now on selecting my Activity Icon again, I
 got the list Activity B screen but its not highlighted. Using onPause, I got
 the position and in onResume I called setSelection(position). But still
 that element in the list is not highlighted

 Any Suggestions?

 Thanks


 On Thu, Jan 28, 2010 at 11:52 AM, theSmith chris.smith...@gmail.comwrote:



 On Jan 27, 7:03 pm, android beginner android.beginne...@gmail.com
 wrote:
  Hi,
  The basic list that I want to view is working.
 
  In my first list activity(ListDemoActivity), I choosed some element,
 which
  triggers another list A activity. If I go back (on pressing BACK key),
 the
  state of ListDemoActivity screen is preserved. Now If I select the same
  element again, I expect the state of A activity to be preserved aswell,
 but
  its not happening.

 You're assuming things that are not true.  Its an activity stack, so
 once you pop it off (hit the back key) that state is lost, and you
 will be creating a new activity when launching that activity A again.

 I'd recommend learning a little bit about the nature of android before
 getting too deep into developing code.
 The Androidology videos will get you started and the Google I/O videos
 are some of my favorites for getting into Android as a pro.
 http://developer.android.com/intl/de/videos/index.html#v=opZ69P-0Jbc


  Below is the code snippet, Can you please suggest me what I need to do?
 
  public class ListDemoActivity extends ListActivity {
  String[] firstPage = {a, b, c, d, e};
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
 
  setListAdapter(new ArrayAdapterString(this,
  android.R.layout.simple_list_item_1,
  firstPage));
 
  }
 
  public void onListItemClick(ListView parent, View v,
  int position, long id)
  {
  String txt = firstPage[position];
  if ((txt == a) ||
  (txt == b))
  {
  Intent startActivity = new Intent(this, Activity_A.class);
  startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
  startActivity(startActivity);
  }
  else
  {
  Intent startActivity = new Intent(this, Activity_B.class);
  startActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
  startActivity(startActivity);
  }
 
  }
 
  }
  On Tue, Jan 26, 2010 at 5:28 PM, theSmith chris.smith...@gmail.com
 wrote:
 
   On Jan 25, 11:48 pm, android beginner android.beginne...@gmail.com
   wrote:
so, each sub-lists should be created as list activity. On selecting
 any
item, should call that particular list activity. Is my understanding
correct?
 
   Yes
 
Also, how to store parent list in the stack? so that on pressing
 escape
key, I can navigate backwards.
 
   Android does this automatically, and I assume you mean the 'back'
   key.  Each new activity is launched ontop of the older ones allowing
   you to navigate backwards down the stack.
 
   -theSmith
 
Thanks
 
On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun 
 bsaad1...@gmail.com
   wrote:
 
 your item must be a listactivity , when you add it to your parent
 list , the UI is adapted automaticly .
 
 On 25 jan, 06:24, android beginner android.beginne...@gmail.com
 wrote:
   Hi,
 
  My Activity has list of items and on clicking any item, new
 window
   with
  different set of list has to appear and this can continue upto 4
 or 5
 level
  depths. I need your expert advice on how to achieve this.
 
  Can I have each sub-list to be of separate activity? If there
 are any
 online
  examples matching this requirement, please let me know.
 
  Thank
 
 --
 You received this message because you are subscribed to the Google
 Groups Android Developers group.
 To post to this group, send email to
   android-developers@googlegroups.com
 To unsubscribe from this group, send email to
 android-developers+unsubscr...@googlegroups.comandroid-developers%2bunsubscr...@googlegroups.com

Re: [android-developers] Re: list - need suggestion

2010-01-25 Thread android beginner 
so, each sub-lists should be created as list activity. On selecting any
item, should call that particular list activity. Is my understanding
correct?

Also, how to store parent list in the stack? so that on pressing escape
key, I can navigate backwards.

Thanks

On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun bsaad1...@gmail.comwrote:

 your item must be a listactivity , when you add it to your parent
 list , the UI is adapted automaticly .

 On 25 jan, 06:24, android beginner android.beginne...@gmail.com
 wrote:
   Hi,
 
  My Activity has list of items and on clicking any item, new window with
  different set of list has to appear and this can continue upto 4 or 5
 level
  depths. I need your expert advice on how to achieve this.
 
  Can I have each sub-list to be of separate activity? If there are any
 online
  examples matching this requirement, please let me know.
 
  Thank

 --
 You received this message because you are subscribed to the Google
 Groups Android Developers group.
 To post to this group, send email to android-developers@googlegroups.com
 To unsubscribe from this group, send email to
 android-developers+unsubscr...@googlegroups.comandroid-developers%2bunsubscr...@googlegroups.com
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[android-developers] Re: list - need suggestion

2010-01-25 Thread theSmith 

On Jan 25, 11:48 pm, android beginner android.beginne...@gmail.com
wrote:
 so, each sub-lists should be created as list activity. On selecting any
 item, should call that particular list activity. Is my understanding
 correct?

Yes

 Also, how to store parent list in the stack? so that on pressing escape
 key, I can navigate backwards.

Android does this automatically, and I assume you mean the 'back'
key.  Each new activity is launched ontop of the older ones allowing
you to navigate backwards down the stack.

-theSmith



 Thanks

 On Tue, Jan 26, 2010 at 9:11 AM, saad bouchehboun bsaad1...@gmail.comwrote:

  your item must be a listactivity , when you add it to your parent
  list , the UI is adapted automaticly .

  On 25 jan, 06:24, android beginner android.beginne...@gmail.com
  wrote:
    Hi,

   My Activity has list of items and on clicking any item, new window with
   different set of list has to appear and this can continue upto 4 or 5
  level
   depths. I need your expert advice on how to achieve this.

   Can I have each sub-list to be of separate activity? If there are any
  online
   examples matching this requirement, please let me know.

   Thank

  --
  You received this message because you are subscribed to the Google
  Groups Android Developers group.
  To post to this group, send email to android-developers@googlegroups.com
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  android-developers+unsubscr...@googlegroups.comandroid-developers%2bunsubscr...@googlegroups.com
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