Dialogue personnalisée trop petit

J'ai un android activité qui met en œuvre un dialogue personnalisé.L'application est en cours d'exécution ok mais le dialogue est trop petit,je veux afficher un plus grand dialogue.Comment puis-je y parvenir?
Voici ma mise en page xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:orientation="vertical" >
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="@drawable/view_more_borders">
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:layout_marginTop="4dp"
android:gravity="center_vertical">
<TextView
android:id="@+id/share_amount"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Company Name:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/nice_blue"
android:typeface="sans" />
<TextView
android:id="@+id/textViewCompanyName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.80"
android:text=" "
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginTop="4dp"
android:gravity="center_vertical">
<TextView
android:id="@+id/textView5"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Price per share:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/nice_blue" />
<TextView
android:id="@+id/textViewprice_pershare"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:layout_alignBaseline="@+id/Yesterday"
android:layout_alignBottom="@+id/Yesterday"
android:layout_marginLeft="38dp"
android:fontFamily="sans-serif"
android:layout_toRightOf="@+id/company"
android:text=" "
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginTop="4dp"
android:gravity="center_vertical">
<TextView
android:id="@+id/textView4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Total cost:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/nice_blue" />
<TextView
android:id="@+id/textview_totalcost"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:layout_alignBaseline="@+id/Yesterday"
android:layout_alignBottom="@+id/Yesterday"
android:layout_marginLeft="38dp"
android:fontFamily="sans-serif"
android:layout_toRightOf="@+id/company"
android:text=" "
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginTop="4dp"
android:gravity="center_vertical">
<TextView
android:id="@+id/textView3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Number of shares:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/nice_blue" />
<EditText
android:id="@+id/shareNumber"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="wrap_content"
android:inputType="number"
android:fontFamily="sans-serif"
android:textSize="12sp"
>
<requestFocus />
</EditText>
</LinearLayout>
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginTop="4dp"
android:gravity="center_vertical">
<TextView
android:id="@+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Payment method:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/nice_blue" />
<Spinner
android:id="@+id/spinner_paymentmode"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2" />
</LinearLayout>   
</LinearLayout>
<Button
android:id="@+id/button_buy_shares"
style="@style/ButtonText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/blue_button"
android:text="Buy" />

Et voici mon résultat.Je veux augmenter la largeur et la hauteur de la boîte de dialogue.

Et mon fichier java

public class MyDialogFragment extends DialogFragment {
public MyDialogFragment() {
}
private EditText mEditText;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.dialogfragment, container);
//mEditText = (EditText) view.findViewById(R.id.txt_your_name);
//getDialog().setTitle("Hello");
getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
return view;
}
}

OriginalL'auteur mungaih pk | 2013-10-02