Android Open Source - JavNav Web View Frag

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
*/*from  w  w w . j a va2 s .  co  m*/
*   JavNav 
*    a simple application for general use of the Texas A&M-Kingsville Campus. 
*    
*    Copyright (C) 2014  Manuel Gonzales Jr.
*
*    This program is free software: you can redistribute it and/or modify
*    it under the terms of the GNU General Public License as published by
*    the Free Software Foundation, either version 3 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program.  If not, see [http://www.gnu.org/licenses/].
*
*/
package com.senior.fragments;


import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.ProgressBar;

import com.senior.javnav.R;

public class WebViewFrag extends Fragment 
{
  private View webFrag;
  private WebView webFragView;
  private Button reload;
  private Button forward;
  private Button back;
  
  private String url = "https://www.google.com";
  private Bundle saveState;
  private boolean restart = false;
  
  @Override
  public View onCreateView(LayoutInflater inflate, ViewGroup container, Bundle savedInstanceState)
  {
    Log.i("webFrag","webFrag started");
    
    webFrag = inflate.inflate(R.layout.web_frag, container, false);
    webFragView = (WebView)webFrag.findViewById(R.id.webFrag);
    webFragView.setWebChromeClient(new ChromeClient());
    webFragView.setWebViewClient(new Client());
    webFragView.getSettings().setBuiltInZoomControls(true);
    webFragView.getSettings().setJavaScriptEnabled(true);
    webFragView.setInitialScale(50);
    
    if(saveState == null || restart)
    {
      Log.i("WebFrag","Attempted url "+url);
      webFragView.clearHistory();
      webFragView.loadUrl(url);
      restart = false;
    }
    else
    {
      webFragView.restoreState(saveState);
    }
    
    reload = (Button)webFrag.findViewById(R.id.webRefr);
    reload.setOnClickListener(new OnClickListener()
    {
      @Override
      public void onClick(View arg0) 
      {
        webFragView.reload();
      }
      
    });
    
    back = (Button)webFrag.findViewById(R.id.webBack);
    back.setOnClickListener(new OnClickListener()
    {
      @Override
      public void onClick(View arg0)
      {
        if(webFragView.canGoBack())
        {
          webFragView.goBack();
        }
      }
    });
    
    forward = (Button)webFrag.findViewById(R.id.webForw);
    forward.setOnClickListener(new OnClickListener()
    {
      @Override
      public void onClick(View arg0)
      {
        if(webFragView.canGoForward())
        {
          webFragView.goForward();
        }
      }
    });
    
    return webFrag;
  }
  
  @Override
  public void onActivityCreated(Bundle savedInstanceState)
  {
    super.onActivityCreated(savedInstanceState);
    if(savedInstanceState != null)
      Log.i("WebFrag","Activity Created");
  }
  
  public void changeUrl(String url)
  {
    this.url = url;
    if(webFragView != null)
    {
      webFragView.loadUrl(this.url);
      webFragView.clearHistory();
      restart = false;
    }
  }
  
  public void loadUrl(String url, boolean restart)
  {
    this.url = url;
    this.restart = restart;
    Log.i("WebViewFrag", this.url);
  }
  
  @Override
  public void onStop()
  {
    saveState = new Bundle();
    
    if(webFragView.saveState(saveState) != null)
      Log.i("WebFrag","State Saved");
    
    super.onStop();
  }
  
  //WebChromeClient
  public class ChromeClient extends WebChromeClient 
  {
    
    public void onProgressChanged(WebView view, int progres)
    {
      ProgressBar progress;
      
      Log.i("Client","Current "+progres);
      
      progress  = (ProgressBar)webFrag.findViewById(R.id.webProgress);
      
      if(progres<100 && progress!=null)
      {
        progress.setProgress(progres);
      }
      
      if(progres==100 && progress!=null)
      {
        progress.setVisibility(View.GONE);
      }
    }

  }
  
  //WebViewClient
  public class Client extends WebViewClient
  {
  
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon)
    {
      Log.i("Client","Page started "+url);
      ProgressBar progress = (ProgressBar)webFrag.findViewById(R.id.webProgress);
      progress.setVisibility(View.VISIBLE);
      super.onPageStarted(view, url, favicon);
    }
    
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url)
    {
      view.loadUrl(url);
      return true;
    }
    
    @Override
    public void onReceivedError(WebView view, int errorVode, String description, String failingUrl)
    {
      ProgressBar progress = (ProgressBar)webFrag.findViewById(R.id.webProgress);
      progress.setVisibility(View.INVISIBLE);
    }
    
  }
  
}

Java Source Code List

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