Android Open Source - opensudoku Changelog

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Back to project page opensudoku.

License

The source code is released under:

GNU General Public License

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Java Source Code

package org.moire.opensudoku.gui;
/*from  w w w  .  ja  va  2 s  .  c o m*/
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import android.app.AlertDialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.webkit.WebView;
import org.moire.opensudoku.R;
import org.moire.opensudoku.utils.AndroidUtils;

public class Changelog {

  private static final String TAG = "Changelog";

  private static final String PREF_FILE_CHANGELOG = "changelog";

  private Context mContext;
  private SharedPreferences mPrefs;

  public Changelog(Context context) {
    mContext = context;
    mPrefs = mContext.getSharedPreferences(PREF_FILE_CHANGELOG, Context.MODE_PRIVATE);
  }

  public void showOnFirstRun() {
    String versionKey = "changelog_" + AndroidUtils.getAppVersionCode(mContext);

    if (!mPrefs.getBoolean(versionKey, false)) {
      showChangelogDialog();

      Editor editor = mPrefs.edit();
      editor.putBoolean(versionKey, true);
      editor.commit();
    }
  }

  private void showChangelogDialog() {

    String changelog = getChangelogFromResources();

    WebView webView = new WebView(mContext);
    webView.loadData(changelog, "text/html", "utf-8");

    AlertDialog changelogDialog = new AlertDialog.Builder(mContext)
        .setIcon(android.R.drawable.ic_menu_info_details)
        .setTitle(R.string.what_is_new)
        .setView(webView)
        .setPositiveButton(R.string.close, null).create();


    changelogDialog.show();
  }

  private String getChangelogFromResources() {
    InputStream is = null;
    try {
      is = mContext.getResources().openRawResource(R.raw.changelog);

      final char[] buffer = new char[0x10000];
      StringBuilder out = new StringBuilder();
      Reader in = new InputStreamReader(is, "UTF-8");
      int read;
      do {
        read = in.read(buffer, 0, buffer.length);
        if (read > 0) {
          out.append(buffer, 0, read);
        }
      } while (read >= 0);

      return out.toString();
    } catch (IOException e) {
      e.printStackTrace();
      Log.e(TAG, "Error when reading changelog from raw resources.", e);
    } finally {
      if (is != null) {
        try {
          is.close();
        } catch (IOException e) {
          e.printStackTrace();
          Log.e(TAG, "Error when reading changelog from raw resources.", e);
        }
      }
    }

    return "";
  }


}

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