title: how could I refresh a webview?
body: <p>so i made a website which could be turned into mobile app simply by using webview. when the first time i install the apk, it work perfectly well but the problem is after that, the web is just static or it's not loaded anymore.</p>
  
  <p>it just open up the same content like the first time i install it even though i already change the whole website. i don't know if the problem was with the webview or with the android.</p>
  
  <p>i already try made a auto refresh/autoreload function in php but it only work in mobile browser and didn't work in my app...
  anyone know any solution? </p>
  
  <p>since i'm a newbie in android developping i'll put the whole code of my main activity</p>
  
  <pre><code>public class MainActivity extends AppCompatActivity
      implements NavigationView.OnNavigationItemSelectedListener {
  
  //initializing WebView
  private WebView mwebView;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
      setSupportActionBar(toolbar);
  
  
  
      DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
      ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
              this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
      drawer.setDrawerListener(toggle);
      toggle.syncState();
  
      NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
      navigationView.setNavigationItemSelectedListener(this);
  
      //WebView
      mwebView = (WebView) findViewById(R.id.myWebView);
      WebSettings webSettings = mwebView.getSettings();
      webSettings.setJavaScriptEnabled(true);
      //improve webView performance
      mwebView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
      mwebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
      mwebView.getSettings().setAppCacheEnabled(true);
      mwebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
      webSettings.setDomStorageEnabled(true);
      webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
      webSettings.setUseWideViewPort(true);
      webSettings.setSavePassword(true);
      webSettings.setSaveFormData(true);
      webSettings.setEnableSmoothTransition(true);
  
  
      mwebView.loadUrl("http://192.168.94.2/autorefresh/");
      //force links open in webview only
      mwebView.setWebViewClient(new MyWebviewClient());
  
  }
  
  @Override
  public void onBackPressed() {
      DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
      if (drawer.isDrawerOpen(GravityCompat.START)) {
          drawer.closeDrawer(GravityCompat.START);
      } else {
          super.onBackPressed();
      }
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      // Handle action bar item clicks here. The action bar will
      // automatically handle clicks on the Home/Up button, so long
      // as you specify a parent activity in AndroidManifest.xml.
      int id = item.getItemId();
  
  
      return super.onOptionsItemSelected(item);
  }
  
  @SuppressWarnings("StatementWithEmptyBody")
  @Override
  public boolean onNavigationItemSelected(MenuItem item) {
      // Handle navigation view item clicks here.
      int id = item.getItemId();
  
      if (id == R.id.nav_home) {
          mwebView.loadUrl("http://192.168.94.2/ee1/");
      }
      if (id == R.id.nav_kolam) {
          mwebView.loadUrl("http://192.168.94.2/ee1/listkolam.php");
      }
      if (id == R.id.nav_pantai) {
          mwebView.loadUrl("http://192.168.94.2/ee1/listpantai.php");
     }
     if (id == R.id.nav_transaksi) {
         System.exit(0);
     }
     if (id == R.id.nav_about) {
         System.exit(0);
  
     }
      if (id == R.id.nav_keluar) {
          System.exit(0);
      }
  
      DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
      drawer.closeDrawer(GravityCompat.START);
      return true;
  }
  
  
  //bikin progress dialog
  private class MyWebviewClient extends WebViewClient {
      //ProgressDialogue
      @Override
  
      public boolean shouldOverrideUrlLoading(WebView view, String url) {
          if (Uri.parse(url).getHost().equals("192.168.94.2")) {
              //open url contents in webview
              return false;
          } else {
              //here open external links in external browser or app
              Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
              startActivity(intent);
              return true;
          }
  
      }
      ProgressDialog pd = null;
  
      @Override
      public void onPageStarted(WebView view, String url, Bitmap favicon) {
          pd=new ProgressDialog(MainActivity.this);
          pd.setTitle("Mohon Tunggu Sebentar");
          pd.setMessage("Website Loading..");
          pd.show();
          super.onPageStarted(view, url, favicon);
      }
  
      @Override
      public void onPageFinished(WebView view, String url) {
          pd.dismiss();
          super.onPageFinished(view, url);
      }
  }
  
  
  //bikin tombol back halaman
  @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);
  }}
  </code></pre>
  
  <p>i'm using native php</p>