Hai bisogno di aiuto con Android TableLayout allineamento

Question

Sto provando a creare un layout di calcolatrice utilizzando TableLayout, ma le ultime due righe non sono allineate con il resto del layout. C'è qualcosa di sbagliato nel mio layout XML?

Quello che sto cercando di fare sarebbe più facile da realizzare in HTML (<td> con colspan o rowspan), quindi dovrei provare la conversione di questo in una WebView?

codice è il seguente: (Screenshot)

<?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"> 
    <EditText 
     android:id="@+id/EditText01" 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent" /> 
    <TableLayout 
     android:layout_height="fill_parent" 
     android:layout_width="fill_parent" 
     android:stretchColumns="*"> 
     <TableRow 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_weight="1"> 
      <Button 
       android:id="@+id/Button08" 
       android:textSize="16pt" 
       android:text="^" 
       android:layout_weight="1" 
       android:layout_height="fill_parent" 
       android:layout_width="wrap_content" /> 
      <Button 
       android:id="@+id/Button09" 
       android:text="÷" 
       android:textSize="16pt" 
       android:layout_height="fill_parent" 
       android:layout_weight="1" 
       android:layout_width="wrap_content" /> 
      <Button 
       android:id="@+id/Button10" 
       android:text="×" 
       android:textSize="16pt" 
       android:layout_height="fill_parent" 
       android:layout_weight="1" 
       android:layout_width="wrap_content" /> 
      <Button 
       android:id="@+id/Button11" 
       android:textSize="16pt" 
       android:text="-" 
       android:layout_weight="1" 
       android:layout_height="fill_parent" 
       android:layout_width="wrap_content" /> 
     </TableRow> 
     <TableRow 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_weight="2"> 
      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="fill_parent" 
       android:orientation="vertical" 
       android:layout_weight="1"> 
       <Button 
        android:id="@+id/Button01" 
        android:text="7" 
        android:textSize="16pt" 
        android:layout_weight="1" 
        android:layout_height="wrap_content" 
        android:layout_width="fill_parent" /> 
       <Button 
        android:layout_height="wrap_content" 
        android:textSize="16pt" 
        android:text="4" 
        android:id="@+id/Button05" 
        android:layout_weight="1" 
        android:layout_width="fill_parent" /> 
      </LinearLayout> 
      <LinearLayout 
       android:layout_height="fill_parent" 
       android:orientation="vertical" 
       android:layout_weight="1" 
       android:layout_width="fill_parent"> 
       <Button 
        android:id="@+id/Button02" 
        android:layout_height="wrap_content" 
        android:text="8" 
        android:textSize="16pt" 
        android:layout_weight="1" 
        android:layout_width="fill_parent" /> 
       <Button 
        android:layout_height="wrap_content" 
        android:textSize="16pt" 
        android:text="5" 
        android:id="@+id/Button06" 
        android:layout_weight="1" 
        android:layout_width="fill_parent" /> 
      </LinearLayout> 
      <LinearLayout 
       android:layout_height="fill_parent" 
       android:orientation="vertical" 
       android:layout_weight="1" 
       android:layout_width="fill_parent"> 
       <Button 
        android:id="@+id/Button03" 
        android:text="9" 
        android:textSize="16pt" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" /> 
       <Button 
        android:textSize="16pt" 
        android:text="6" 
        android:id="@+id/Button07" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" /> 
      </LinearLayout> 
      <Button 
       android:id="@+id/Button04" 
       android:text="+" 
       android:textSize="16pt" 
       android:layout_height="fill_parent" 
       android:layout_width="fill_parent" 
       android:layout_weight="1" /> 
     </TableRow> 
     <TableRow 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_weight="2"> 
      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="fill_parent" 
       android:orientation="vertical" 
       android:layout_weight="2"> 
       <LinearLayout 
        android:layout_weight="1" 
        android:orientation="horizontal" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content"> 
        <Button 
         android:id="@+id/Button02" 
         android:textSize="16pt" 
         android:layout_weight="1" 
         android:layout_width="fill_parent" 
         android:layout_height="fill_parent" 
         android:text="1" /> 
        <Button 
         android:textSize="16pt" 
         android:id="@+id/Button06" 
         android:layout_weight="1" 
         android:layout_width="fill_parent" 
         android:layout_height="fill_parent" 
         android:text="2" /> 
       </LinearLayout> 
       <Button 
        android:id="@+id/Button01" 
        android:layout_height="wrap_content" 
        android:textSize="16pt" 
        android:layout_weight="1" 
        android:layout_width="fill_parent" 
        android:text="0" /> 
      </LinearLayout> 
      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="fill_parent" 
       android:orientation="vertical" 
       android:layout_weight="1"> 
       <Button 
        android:id="@+id/Button03" 
        android:textSize="16pt" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="3" /> 
       <Button 
        android:textSize="16pt" 
        android:id="@+id/Button07" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="." /> 
      </LinearLayout> 
      <Button 
       android:id="@+id/Button04" 
       android:textSize="16pt" 
       android:layout_height="fill_parent" 
       android:layout_width="fill_parent" 
       android:layout_weight="1" 
       android:text="=" /> 
     </TableRow> 
    </TableLayout> 
</LinearLayout> 

Answer 1

I suoi ultimi TableRow ha tre celle (cioè, i bambini immediati). Il resto ha quattro. Quindi, non si allineeranno se non si inserisce un attributo android:layout_span da qualche parte per indicare quale cella sta assorbendo la quarta.