Android Open Source - RecipeBook Recipe Detail Summary Fragment

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License

The source code is released under:

Copyright (c) 2013, Ian Lake All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Red...

Java Source Code

package com.ianhanniballake.recipebook.ui;
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import android.app.Fragment;
import android.app.LoaderManager;
import android.content.ContentValues;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.TextView;

import com.ianhanniballake.recipebook.R;
import com.ianhanniballake.recipebook.provider.RecipeContract;

/**
 * A fragment representing a single Recipe detail screen. This fragment is either contained in a
 * {@link RecipeListActivity} in two-pane mode (on tablets) or a {@link RecipeDetailActivity} on handsets.
 */
public class RecipeDetailSummaryFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor>
{
  /**
   * Adapter to display the detailed data
   */
  private CursorAdapter adapter;
  /**
   * Current description for the recipe
   */
  String description;
  /**
   * Current title for the recipe
   */
  String title;

  /**
   * Mandatory empty constructor for the fragment manager to instantiate the fragment (e.g. upon screen orientation
   * changes).
   */
  public RecipeDetailSummaryFragment()
  {
  }

  private void clear()
  {
    title = "";
    description = "";
  }

  /**
   * Gets the current values shown in this fragment
   * 
   * @return The current values
   */
  public ContentValues getContentValues()
  {
    final ContentValues contentValues = new ContentValues();
    title = ((TextView) getView().findViewById(R.id.title)).getText().toString();
    contentValues.put(RecipeContract.Recipes.COLUMN_NAME_TITLE, title);
    description = ((TextView) getView().findViewById(R.id.description)).getText().toString();
    contentValues.put(RecipeContract.Recipes.COLUMN_NAME_DESCRIPTION, description);
    return contentValues;
  }

  @Override
  public void onActivityCreated(final Bundle savedInstanceState)
  {
    super.onActivityCreated(savedInstanceState);
    adapter = new CursorAdapter(getActivity(), null, 0)
    {
      @Override
      public void bindView(final View view, final Context context, final Cursor cursor)
      {
        final int titleColumnIndex = cursor.getColumnIndex(RecipeContract.Recipes.COLUMN_NAME_TITLE);
        title = cursor.getString(titleColumnIndex);
        final int descriptionColumnIndex = cursor
            .getColumnIndex(RecipeContract.Recipes.COLUMN_NAME_DESCRIPTION);
        description = cursor.getString(descriptionColumnIndex);
      }

      @Override
      public View newView(final Context context, final Cursor cursor, final ViewGroup parent)
      {
        // View is already inflated in onCreateView
        return null;
      }
    };
    if (savedInstanceState != null)
    {
      title = savedInstanceState.getString(RecipeContract.Recipes.COLUMN_NAME_TITLE);
      description = savedInstanceState.getString(RecipeContract.Recipes.COLUMN_NAME_DESCRIPTION);
      // No longer need the loader as we have valid local copies (which may have changes) from now on
      getLoaderManager().destroyLoader(0);
      updateViews();
    }
    else if (!Intent.ACTION_INSERT.equals(getActivity().getIntent().getAction()))
      getLoaderManager().initLoader(0, null, this);
    else
    {
      clear();
      updateViews();
    }
  }

  @Override
  public Loader<Cursor> onCreateLoader(final int id, final Bundle args)
  {
    return new CursorLoader(getActivity(), getActivity().getIntent().getData(), null, null, null, null);
  }

  @Override
  public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState)
  {
    final String action = getActivity().getIntent().getAction();
    final boolean isEdit = Intent.ACTION_INSERT.equals(action) || Intent.ACTION_EDIT.equals(action);
    final int layoutId = isEdit ? R.layout.fragment_summary_edit : R.layout.fragment_summary_detail;
    return inflater.inflate(layoutId, container, false);
  }

  @Override
  public void onLoaderReset(final Loader<Cursor> data)
  {
    adapter.swapCursor(null);
  }

  @Override
  public void onLoadFinished(final Loader<Cursor> loader, final Cursor data)
  {
    adapter.swapCursor(data);
    if (data.moveToFirst())
      adapter.bindView(getView(), getActivity(), data);
    else
      clear();
    updateViews();
  }

  @Override
  public void onSaveInstanceState(final Bundle outState)
  {
    super.onSaveInstanceState(outState);
    title = ((TextView) getView().findViewById(R.id.title)).getText().toString();
    outState.putString(RecipeContract.Recipes.COLUMN_NAME_TITLE, title);
    description = ((TextView) getView().findViewById(R.id.description)).getText().toString();
    outState.putString(RecipeContract.Recipes.COLUMN_NAME_DESCRIPTION, description);
  }

  private void updateViews()
  {
    final View view = getView();
    final TextView titleView = (TextView) view.findViewById(R.id.title);
    titleView.setText(title);
    final TextView descriptionView = (TextView) view.findViewById(R.id.description);
    descriptionView.setText(description);
  }
}

Java Source Code List

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