Android Open Source - GridListViewAdapters Base Cursor Grid Activity

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License

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

/**
 * Copyright 2014-present Biraj Patel/*w ww  .  j  a v a 2 s .c o  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.birin.cursorgridadapter.base;

import android.app.Activity;
import android.app.FragmentManager;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ListView;

import com.birin.cursorgridadapter.datasetup.CursorRetainingFragment;
import com.birin.cursorgridadapter.datasetup.TestContentProvider;
import com.birin.gridlistviewadapters.utils.PositionCalculator;
import com.birin.gridlistviewadaptersdemo.R;
import com.birin.gridlistviewadaptersdemo.common.Constants;

public abstract class BaseCursorGridActivity extends Activity implements
    LoaderCallbacks<Cursor> {

  protected ListView listView;
  protected BaseEmployeeCursorGridAdapter listviewAdapter;
  protected CursorRetainingFragment dataRetainingFragment;
  protected LayoutInflater inflater;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    inflater = LayoutInflater.from(getApplicationContext());
    loadRetainedFragment();
    listView = (ListView) findViewById(R.id.list_view);
    listviewAdapter = getListViewAdapter();
    bindAdapterToList();
    getLoaderManager().initLoader(0, null, this);
  }

  protected void bindAdapterToList() {
    listView.setAdapter(listviewAdapter);
  }

  private void loadRetainedFragment() {
    FragmentManager fm = getFragmentManager();
    dataRetainingFragment = (CursorRetainingFragment) fm
        .findFragmentByTag(Constants.TAG_RETAINED_FRAGMENT);

    // If the Fragment is non-null, then it is currently being
    // retained across a configuration
    // changgenerateSomeDummyDataAndAddToList();e.
    if (dataRetainingFragment == null) {
      dataRetainingFragment = getCursorRetainingFragment();
      if (dataRetainingFragment != null) {
        fm.beginTransaction()
            .add(dataRetainingFragment,
                Constants.TAG_RETAINED_FRAGMENT).commit();
      }
    }
  }

  protected int getMaxCardsInRow() {
    return PositionCalculator.getMaxCardsFor(getCurrentOrientation(),
        Constants.MAX_CARDS_INFO);
  }

  protected int getCurrentOrientation() {
    return getResources().getConfiguration().orientation;
  }

  @Override
  public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
    return new CursorLoader(getApplicationContext(),
        TestContentProvider.CONTENT_URI_EMPLOYEE, null, null, null,
        null);
  }

  @Override
  public void onLoadFinished(Loader<Cursor> arg0, Cursor data) {
    if (null != data && data.getCount() > 0) {
      findViewById(R.id.place_holder_text).setVisibility(View.GONE);
      listView.setVisibility(View.VISIBLE);
      listviewAdapter.swapCursor(data);
    }
  }

  @Override
  public void onLoaderReset(Loader<Cursor> arg0) {
    listviewAdapter.swapCursor(null);
  }

  protected BaseEmployeeCursorGridAdapter getListViewAdapter() {
    return new BaseEmployeeCursorGridAdapter(getApplicationContext(),
        getMaxCardsInRow(), null);
  }

  protected CursorRetainingFragment getCursorRetainingFragment() {
    return new CursorRetainingFragment();
  }

}
Java Source Code List
