Android Open Source - final_app Help Activity

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License

The source code is released under:

CC0 1.0 Universal Statement of Purpose The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent...

Java Source Code

/*
 * Copyright 2008 ZXing authors/*from w w w . ja  v a  2s  .co m*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;

/**
 * An HTML-based help screen.
 * 
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class HelpActivity extends Activity {

  private static final String BASE_URL = "file:///android_asset/html-" + LocaleManager.getTranslatedAssetLanguage() + '/';

  private WebView webView;

  @Override
  protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.help);

    webView = (WebView) findViewById(R.id.help_contents);

    if (icicle == null) {
      webView.loadUrl(BASE_URL + "index.html");
    } else {
      webView.restoreState(icicle);
    }
  }

  @Override
  protected void onSaveInstanceState(Bundle state) {
    String url = webView.getUrl();
    if (url != null && !url.isEmpty()) {
      webView.saveState(state);
    }
  }

  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {
      webView.goBack();
      return true;
    }
    return super.onKeyDown(keyCode, event);
  }

}

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