Progressdialogu kapatamıyorum.

Arkadaslar webview li uygulama yaptım ancak yükleniyor yazısını bir türlü kapatamadım.

onPageFinished kodunu tanımıyor android studio kodlarım;

package com.wordpresssite.com.wordpress;

import android.app.ProgressDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {


    private WebView mWebview;
    private ProgressDialog ProgressDialog;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_fullscren);
        WebView tarayici;
        tarayici=(WebView)findViewById(R.id.mWebView);
        tarayici.getSettings().setJavaScriptEnabled(true);
        tarayici.setWebViewClient(new WebViewClient());
        tarayici.setWebChromeClient(new WebChromeClient());
        tarayici.loadUrl("http://wordpress.com");


        //webview
        mWebview=(WebView) findViewById(R.id.mWebView);
        WebSettings websetting=mWebview.getSettings();
        websetting.setJavaScriptEnabled(true);
        mWebview.loadUrl("http://wordpress.com");


        final ProgressDialog progressDialog = ProgressDialog.show(this, "Wordpress",
                "Sayfa Yükleniyor...", true);



    }





    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getAction()==KeyEvent.ACTION_DOWN){
            switch (keyCode) {
               case  KeyEvent.KEYCODE_BACK:
                if (mWebview.canGoBack()) {
                    mWebview.goBack();
                }
                else {
                    finish();
                }
                return true;
            }
        }
            return super.onKeyDown(keyCode, event);

        }
}