Q:

How to use weights to arrange Gridview Items programmatically with TableLayout

I am working on a Suduko solver app. I want the layout to have 9x9 TextView in 9 Gridviews. I want to put below them two buttons (Solve, clear). I have made it but it does not work probably with small devices (Can`t see the buttons and the Grid view turned to scrollable that does not fit the screen)
Here is how I add Textviews to the Gridview
gridView = (GridView) findViewById(R.id.gridView1);
String[] arrayEmpty = new String[] {"", "", "", "", "", "", "", "", ""};
ArrayList<String> listEmpty = new ArrayList<String>(Arrays.asList(arrayEmpty));
gridView.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item,list));

Here is my Layout.XML
<?xml version="1.0" encoding="utf-8"?>

<TableRow android:id="@+id/tableRow1"
    android:layout_width="match_parent"
    android:background="#999999"
    android:layout_weight="1"
    android:layout_height="match_parent">

    <GridView
    android:id="@+id/gridView1"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
    </GridView>

    <GridView
    android:id="@+id/gridView2"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<GridView
    android:id="@+id/gridView3"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<TableRow android:id="@+id/tableRow2"
    android:layout_width="match_parent"
    android:background="#999999"
    android:layout_weight="1"
    android:layout_height="match_parent">

    <GridView
    android:id="@+id/gridView4"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
    </GridView>

    <GridView
    android:id="@+id/gridView5"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<GridView
    android:id="@+id/gridView6"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<TableRow android:id="@+id/tableRow3"
    android:layout_width="match_parent"
    android:background="#999999"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:layout_marginBottom="15dp">

    <GridView
    android:id="@+id/gridView7"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
    </GridView>

    <GridView
    android:id="@+id/gridView8"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<GridView
    android:id="@+id/gridView9"
    android:clickable="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:background="#5C5C5C"
    android:layout_weight="1"
    android:numColumns="3" >
</GridView>

<TableRow android:layout_weight="1" android:layout_height="match_parent">
    <Button
        android:id="@+id/solve_button"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="5dp"
        android:layout_weight="1"
        android:text="@string/solve" />
    <Button
        android:id="@+id/clear_button"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="5dp"
        android:layout_weight="1"
        android:text="@string/_clear" />
</TableRow>

And this is a screenshot of what I had 
But this is what I need my Layout to be with all Devices. Maybe I should use weights, but I don`t know how

A:

Here's a trick: For a completely uniform table or grid, you don't need TableView or GridView at all.  Just put everything inside LinearLayout with size=0 and layoutWeight=1. That size=0 seems counter-intuitive, but combined with the layoutWeight=1, it has the effect of giving all child widgets the exact same size, regardless of their contents.
So do something like this:
<!-- Outer container; a vertical layout that fills the screen -->
<LinearLayout
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
  <!-- first row -->
  <LinearLayout
      android:orientation="horizontal"
      android:layout_width="fill_parent"
      android:layout_height="0dp"
      android:layout_weight="1">
    <!-- contents of the first row -->
    <!-- first item in first row -->
    <View
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1" />
    <!-- second item in first row -->
    <View
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1" />
    <!-- third item in first row -->
    <View
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1" />
  </LinearLayout>
  <!-- second row -->
  <LinearLayout
      android:orientation="horizontal"
      android:layout_width="fill_parent"
      android:layout_height="0dp"
      android:layout_weight="1">
    <!-- contents of the second row. -->
    <!-- etc -->
  </LinearLayout>
  <!-- third row -->
  <LinearLayout
      android:orientation="horizontal"
      android:layout_width="fill_parent"
      android:layout_height="0dp"
      android:layout_weight="1">
    <!-- contents of the third row -->
    <!-- etc -->
  </LinearLayout>
  <Button android:id="@+id/solveButton"
      android:layout_width="fill_parent"
      android:layout_width="wrap_content" />
  <Button android:id="@+id/clearButton"
      android:layout_width="fill_parent"
      android:layout_width="wrap_content" />
</LinearLayout>

