How to set text size in WebView in android

I am using WebView to justify text. I want to know-

Is it possible to set the text size in layout file? As I want different text size for different screen sizes.
And also one problem is first background appears then after 2 second text display. Is it possible to display text immediately?

Size of text is 7-8 lines.

Code-

public class Main extends Activity {

       WebView mWebView;

       @Override
       public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);        
          mWebView = (WebView) findViewById(R.id.webview);
          String text = "<html><body>"+"<p align=\"justify\">"+getString(R.string.itext)+"</p>"+"</body></html>"; 
      mWebView .loadData(text, "text/html", "utf-8");
      mWebView .setBackgroundColor(Color.TRANSPARENT);
       }
}

Xml-

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:orientation="vertical" 
       android:layout_width="fill_parent"
       android:layout_height="fill_parent" 
       android:background="@drawable/light">

<WebView
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/transparent"/>
</LinearLayout>

Solution

For setting text size from layout-

final WebSettings webSettings = web.getSettings();
Resources res = getResources();
fontSize = res.getDimension(R.dimen.txtSize);
webSettings.setDefaultFontSize((int)fontSize);

For Immediate text display-

webSettings.setRenderPriority(RenderPriority.HIGH);
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
webSettings.setAppCacheEnabled(false);
webSettings.setBlockNetworkImage(true);
webSettings.setLoadsImagesAutomatically(true);
webSettings.setGeolocationEnabled(false);
webSettings.setNeedInitialFocus(false);
webSettings.setSaveFormData(false);

In values folder-

<resources>

    <dimen name="txtSize">26sp</dimen>

</resources>

Hope it works.