Dialog box title text size in Android

Question

I am working on an Android application in which I want to set the text size of my dialog box. I have used the following code an XML for textview but it is only setting the size of my fields. I want to set the text size and color of my title as well.

final CharSequence[] items = { "Fake Request", "Abusive Language","Indecent Approach","Unacceptable Attitude","Dangerous Behavior",};

           ArrayAdapter<CharSequence> itemsAdapter = new
           ArrayAdapter<CharSequence> (this,
                    R.layout.menu_items, items);
           AlertDialog.Builder   builder = new AlertDialog.Builder(this);
           builder.setTitle("My Title");
           builder.setIcon(R.drawable.icon);
           builder.setAdapter(itemsAdapter, new DialogInterface.OnClickListener()
           {
               public void onClick(DialogInterface dialog, int item) {
                          switch(item) {
                                  case 0:
                              //Mark as Beautiful
                                  break;
                               case 1:
                              //Mark as Beautiful
                                  break;
                            case 2: 
                                //Mark as Not a Portrait
                                  break;
                            case 3:
                              //Mark as Offensive
                                  break;
                           case 4:
                              //Mark as Spam
                                  break;
                           case 5:
                              //cancel
                           break;
                           }
               }
           }

               );
           builder.show();

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@android:id/text1"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:padding="10dip"
       android:layout_margin="5dip"
       android:gravity="center_vertical"
       android:textSize="5dip"
       android:textColor="@color/red_theme"
       android:typeface="normal"
       android:lineSpacingExtra="0dip"/>

Answer 1

If you want to do it all using styles:

<style name="MyDialog" parent="Base.Theme.AppCompat.Light.Dialog">
    <item name="android:windowTitleStyle">@style/DialogTitle</item>
</style>

<style name="DialogTitle" parent="TextAppearance.AppCompat.Large">
    <item name="android:textSize">18sp</item>
</style>

And create your dialog as such

new AlertDialog.Builder(this, R.style.MyDialog);

Answer 2

//Use this code
TextView myMsg = new TextView(this);
  myMsg.setText("Succesfully send!");
  myMsg.setGravity(Gravity.CENTER_HORIZONTAL);
  myMsg.setTextSize(20); 
  myMsg.setTextColor(Color.WHITE);
  //set custom title
        builder.setCustomTitle(myMsg);