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How to realise a Grid of Views..?

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       anddev.org - Android Development Community | Android Tutorials | Index -> Other Coding-Problems
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plusminus
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Joined: 14 Nov 2007
Posts: 2624
Location: College Park, MD
PostPosted: Sun Feb 03, 2008 10:42 pm    Post subject: Reply with quote
Hello sommeralex,

"linearity" can be horizontal or vertical. Horizontal is the default for Linearlayout.

Add the following line Arrow Down to the constructor to make it Vertical:
Java:
this.setOrientation(LinearLayout.VERTICAL);


Regards,
plusminus
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sommeralex
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Joined: 20 Jan 2008
Posts: 88
Location: Vienna
PostPosted: Sun Feb 03, 2008 11:03 pm    Post subject: Reply with quote
thx!!

but - oh my god - i mixed the meaning of horizontal with vertical (i mean i know whats hor/ver) Wink

but, i thought, if something is set to horizontal, a view then is like this

---------
a
---------
b
---------
c
---------

and if the elements are added, they come for each "addView"invocation in the next line. But, horizontal means

--- a--- b--- c ----

so, its an little excuse (that i really read the doc but just was confused about the result)
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sommeralex
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PostPosted: Mon Feb 04, 2008 12:01 am    Post subject: Reply with quote
hello plusminus,

how can i make exactley the menu you are showing in the screenshot? (the screenshot and example you sent are not the same..)

A Grid View for me is something like a (dynamic) table -> i want each icon i add, to be positioned the same as in your screenshot. But which funtciton is responsible for this?

each iconText needs the full screen-line-space.. i can senter them, or align them to left, but i only have for each row one view object.

hm..

i got a sollution but i am not really happy about it:

XML:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<GridView id="@+id/myGrid"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
      android:numColumns="3"
    />   
</LinearLayout>


android:numColumns="3" -> works, but i would prefer auto_fit like

XML:

android:numColumns="auto_fit"


but then, i have a division by null error (?)
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plusminus
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PostPosted: Mon Feb 04, 2008 1:50 am    Post subject: Reply with quote
Hello sommeralex,

oh sorry, i changed the onCreate() (after I zipped the code) to get a nicer screenshot:
This is what it finally looked like:
Java:
     @Override
     protected void onCreate(Bundle icicle) {
          super.onCreate(icicle);

          setContentView(R.layout.iconmenu);

          iconTextGrid = (GridView) findViewById(R.id.myGrid);
          iconTextGrid.setNumColumns(3);
          IconTextMenuAdapter itma = new IconTextMenuAdapter(this);

          itma.add(new IconTextMenuView(this, "Menu 1"));
          itma.add(new IconTextMenuView(this, "Menu 2"));
          itma.add(new IconTextMenuView(this, "Menu 3"));
          itma.add(new IconTextMenuView(this, "Menu 4"));
          itma.add(new IconTextMenuView(this, "Menu 5"));
          itma.add(new IconTextMenuView(this, "Menu 6"));
          itma.add(new IconTextMenuView(this, "Menu 7"));
          itma.add(new IconTextMenuView(this, "Menu 8"));
          itma.add(new IconTextMenuView(this, "Menu 9"));

          iconTextGrid.setAdapter(itma);
     }


GridViews like in Swing are filled primary from left to right, and secondary from top to bottom. I don't know how these rules can be broken.

The " android:numColumns="auto_fit" " would be really useful, but also doesn't work with me.
Throws an internal Exception, what is probably not our fault(Tried it with my AndNav-FlagGrid):
Java:
E/AndroidRuntime(563):     at android.widget.GridView.determineColumns(GridView.java:536)


Regards,
plusminus
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Last edited by plusminus on Mon Feb 04, 2008 12:01 pm; edited 1 time in total
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sommeralex
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PostPosted: Mon Feb 04, 2008 11:12 am    Post subject: Reply with quote
hello plusminus,

what if there is not enough space on the phone due to the use of 3 columns?
is the auto_fit bug mentioned as a bug at google? ( i couldnt find it in the list ->because if so, i will put it in the bug list)
alex
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plusminus
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PostPosted: Mon Feb 04, 2008 12:01 pm    Post subject: Reply with quote
Hello sommeralex,

thats the reason why the "auto-fit" exists, but it does not yet work correctly.

Arrow I've put the issue to the tracker.
Just approved that it also happens with xml-only layout (without Adapter-Stuff):
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<GridView
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:numColumns="auto_fit">
           <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
         <Button android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="Test" />
</GridView>
</LinearLayout>


Regards,
plusminus
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sommeralex
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PostPosted: Mon Feb 04, 2008 12:40 pm    Post subject: Reply with quote
ok! thx Wink
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sommeralex
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Posts: 88
Location: Vienna
PostPosted: Sat Feb 23, 2008 7:14 pm    Post subject: Reply with quote
hello nice forum Wink

the iconMenu was a little challenge! the next thing to do would be to implement a "real icon menu" as described now: The trouble is, that this version now only is usable with the mouse/touch. - but what about mobile phones without a touchscreen?

how can i make make view (which containts of views) being "selectable" with KEY? and if it is selected, i want some graphical action (select-status)

hope, some can help me..

i think, it has something to do with:
Set focus: The framework will handled moving focus in response to user input. To force focus to a specific view, call requestFocus().

alex
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E.Jyothsna
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Joined: 28 Feb 2008
Posts: 22
Location: chennai
PostPosted: Wed Apr 09, 2008 3:32 pm    Post subject: Reply with quote
by using grid view how can we click that icons using emulator keys?by using mouse its working.but i want to display by using emulator keys.plz reply me soon.it's very urgent.
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