Android Open Source - GridListViewAdapters List Grid Adapter

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2014-present Biraj Patel//from w w w  .ja v  a2 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.gridlistviewadapters;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;

public abstract class ListGridAdapter<T, CVH> extends BaseGridAdapter<T, CVH> {

  private List<T> dataList = new ArrayList<T>();

  public ListGridAdapter(Context context, int totalCardsInRow) {
    super(context, totalCardsInRow);
  }

  @Override
  public T getCardData(int absoluteCardPosition) {
    validatePositionOrThrow(absoluteCardPosition);
    return dataList.get(absoluteCardPosition);
  }

  @Override
  public void validatePositionOrThrow(int position) {
    if (position < 0 || position >= getAbsoluteCardsCount()) {
      throw new IndexOutOfBoundsException("Position requested "
          + position + " Available list size "
          + getAbsoluteCardsCount());
    }
  }

  @Override
  public int getAbsoluteCardsCount() {
    if (null != dataList) {
      return dataList.size();
    }
    return 0;
  }

  /**
   * Adds the new item into existing list.
   * 
   * @param dataList
   *            The new data list to be appended at end of current list
   * 
   * @see ListGridAdapter#swapDataList(List)
   * 
   */
  public void addItemsInGrid(List<T> newDataList) {
    int newDataSize = 0;
    if (newDataList != null && newDataList.isEmpty() == false) {
      this.dataList.addAll(newDataList);
      newDataSize = getAbsoluteCardsCount();
    }
    updateGridWithNewSize(newDataSize);
  }

  /**
   * if you want to change the complete data list then consider using this
   * function, this will clear current data & replace with new data list
   * passing null instead of valid data will simply clear whole data.
   * 
   * @param dataList
   *            the new data list.
   */
  public void swapDataList(List<T> newDataList) {
    this.dataList.clear();
    invalidateStructure();
    addItemsInGrid(newDataList);
  }

  /**
   * Deletes item from list for given position
   * 
   * @param position
   *            the position at which item needs to be removed.
   */
  public void deleteItemFromList(int position) {
    validatePositionOrThrow(position);
    dataList.remove(position);
    invalidateStructure();
    updateGridWithNewSize(getAbsoluteCardsCount());
  }

  /**
   * Deletes given object from list.
   * 
   * @param data
   *            the object to be deleted.
   * @return true, if successful
   */
  public boolean deleteItemFromList(T data) {
    boolean isRemoved = dataList.remove(data);
    if (isRemoved == true) {
      invalidateStructure();
      updateGridWithNewSize(getAbsoluteCardsCount());
    }
    return isRemoved;
  }

  /**
   * Clears the complete data list & updates UI.
   */
  public void clearList() {
    swapDataList(null);
  }
}

Java Source Code List

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