Android Open Source - android_rss_reader Add Feed Fragment

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License

The source code is released under:
Apache License
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Java Source Code

/***********************************************************************************************************************
 * ==========================================
 *//w  w w  . ja  v a2 s .  c o  m
 * Copyright (C) 2013 by Paul Oremland
 * http://www.linkedin.com/in/pauloremland
 * https://github.com/poremland
 *
 ***********************************************************************************************************************
 *
 * 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 net.oremland.rss.reader.fragments;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.*;
import android.view.View.OnClickListener;
import android.widget.*;

import net.oremland.rss.reader.R;
import net.oremland.rss.reader.helpers.FeedHelper;
import net.oremland.rss.reader.models.Feed;

public class AddFeedFragment
  extends
    Fragment
{
  private OnFeedListChangedListener listener = null;

  public interface OnFeedListChangedListener
  {
    void onFeedListChanged();
  }

  @Override
  public void onActivityCreated(Bundle savedInstanceState)
  {
    super.onActivityCreated(savedInstanceState);
    if(getActivity() instanceof OnFeedListChangedListener)
    {
      listener = (OnFeedListChangedListener)getActivity();
    }
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
  {
    View view = inflater.inflate(R.layout.add_feed_fragment, container, false);
    this.setSubmitOnClickListener(view);
    return view;
  }

  private void setSubmitOnClickListener(View view)
  {
    Button button = (Button)view.findViewById(R.id.submit);
    if(button != null)
    {
      button.setOnClickListener(this.getSubmitOnClickListener());
    }

  }

  protected View.OnClickListener getSubmitOnClickListener()
  {
    return new OnClickListener()
    {
      public void onClick(View view)
      {
        submit(view);
      }
    };
  }

  private void submit(View view)
  {
    if(getView() != null)
    {
      String name = this.getEditTextValue(getView(), R.id.feed_name);
      String url = this.getEditTextValue(getView(), R.id.feed_url);
      if(TextUtils.isEmpty(name) || TextUtils.isEmpty(url))
      {
        this.displayValidationError();
        return;
      }

      this.saveFeed(name, url);
    }
  }

  private String getEditTextValue(View view, int id)
  {
    if(view != null)
    {
      EditText widget = (EditText)view.findViewById(id);
      if(widget != null)
      {
        return widget.getText().toString();
      }
    }
    return null;
  }

  protected void displayValidationError()
  {
    Toast.makeText(getContext(), "Name and Url cannot be blank", Toast.LENGTH_LONG).show();
  }

  private void saveFeed(String name, String url)
  {
    Feed feed = new Feed(name, url);
    FeedHelper helper = this.getFeedHelper();
    helper.addFeed(feed);
    Toast.makeText(getContext(), name + " has been added", Toast.LENGTH_SHORT).show();
    this.notifyListenerOfFeedListChanged();
  }

  protected FeedHelper getFeedHelper()
  {
    return new FeedHelper();
  }

  protected Context getContext()
  {
    return getActivity();
  }

  protected void notifyListenerOfFeedListChanged()
  {
    if(this.listener != null)
    {
      this.listener.onFeedListChanged();
    }
  }
}
Java Source Code List
