Android Open Source - scanvine-android Story Detail Fragment

From Project

License

The source code is released under:
Copyright (c) 2013 Jonathan Evans (http://www.rezendi.com) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Softw...
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Java Source Code

package com.scanvine.android.ui;
/*from  w w w  .jav  a  2 s  .co m*/
import java.io.File;

import org.json.JSONObject;

import android.annotation.SuppressLint;
import android.app.Activity;
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.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

import com.scanvine.android.R;
import com.scanvine.android.model.Story;
import com.scanvine.android.util.SVDownloadManager;
import com.scanvine.android.util.Util;

/**
 * A fragment representing a single Story detail screen. This fragment is either
 * contained in a {@link StoryListActivity} in two-pane mode (on tablets) or a
 * {@link StoryDetailActivity} on handsets.
 */
public class StoryDetailFragment extends Fragment {
  public static final String STORY_JSON = "json";
  public static String ABOUT  = "about";

  private boolean isAbout;
  private Story story;
  private Callbacks mCallbacks = sDummyCallbacks;
  private SVDownloadManager downloadManager = new SVDownloadManager();

  /**
   * A callback interface that all activities containing this fragment must
   * implement. This mechanism allows activities to be notified of page loading.
   */
  public interface Callbacks {
      public void showProgress(Boolean progress);
  }

  // A dummy implementation for use when not attached to an activity.
  private static Callbacks sDummyCallbacks = new Callbacks() {
    @Override
      public void showProgress(Boolean progress) {}
  };

  // Mandatory empty constructor
  public StoryDetailFragment() { }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    isAbout = getArguments().containsKey(ABOUT) && getArguments().getBoolean(ABOUT);
    if (isAbout)
      getActivity().setTitle(R.string.about);
    else if (getArguments().containsKey(STORY_JSON)) {
      story = Story.GetStoryFor(getArguments().getString(STORY_JSON));
      getActivity().setTitle(story.getSourceName()+" - "+story.getTitle());
    }
  }

  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_story_detail, container, false);
    load(story, rootView);
    return rootView;
  }
  
  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);

    // Activities containing this fragment must implement its callbacks.
    if (!(activity instanceof Callbacks)) {
      throw new IllegalStateException("Activity must implement fragment's callbacks.");
    }

    mCallbacks = (Callbacks) activity;
  }

  @SuppressLint("SetJavaScriptEnabled")
  private void load(Story story, View rootView) {
    WebView webView = (WebView) rootView.findViewById(R.id.story_detail);

      if (isAbout)
      webView.loadUrl("file:///android_asset/about.html");
      else if (story != null) {
      webView.setWebViewClient(getWebViewClient());
      WebSettings webSettings = webView.getSettings();
      webSettings.setJavaScriptEnabled(true);
        webSettings.setLoadWithOverviewMode(true);
        webSettings.setUseWideViewPort(true);
        webSettings.setBuiltInZoomControls(true);
        webSettings.setDisplayZoomControls(false);
        webSettings.setSupportZoom(true);
      mCallbacks.showProgress(true);
        if (downloadManager.downloadExistsFor(getActivity(), story)) {
        File file = new File(getActivity().getFilesDir(), story.getFilename());
        try {
          String contents = Util.ConvertFileToString(file);
          JSONObject json = new JSONObject(contents);
          String html = json.getString("file");
          html = html==null ? "" : html;
          html = html.replace("<iframe", "<!--").replace("</iframe>","-->");
          Log.i(""+this, "Got downloaded story of length "+html.length());
          webView.loadDataWithBaseURL(story.getHost(), html, "text/html", "utf-8", null);;
        }
        catch(Exception ex) {
          Log.e(""+this, "Couldn't get story from "+file);
          webView.loadUrl(story.getURL());
        }
      }
      else
        webView.loadUrl(story.getURL());
    }

  }

  private WebViewClient getWebViewClient() {
    return new WebViewClient() {
          @Override
          public boolean shouldOverrideUrlLoading(WebView view, String url) {
              view.loadUrl(url);
              return true;
          }
          
          @Override
          public void onPageFinished(WebView view, String url) {
              mCallbacks.showProgress(false);
          }
          
          @Override
          public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
              Toast toast = Toast.makeText(getActivity(), description, Toast.LENGTH_SHORT);
              toast.show();
          }
    };
  }
}
Java Source Code List
