Android Open Source - Vispin Base All Adapters

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. ...

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Java Source Code

package com.jpardogo.vispin.adapters;
//www.ja  v  a 2 s.  c  o  m
import android.content.Context;
import android.support.v4.util.LongSparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.jpardogo.vispin.adapters.delegates.DelegateAdapter;
import com.jpardogo.vispin.models.ListItem;
import com.jpardogo.vispin.utils.Utils;

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

import butterknife.ButterKnife;

public abstract class BaseAllAdapters<T> extends BaseAdapter {

    protected Context mContext;
    protected LongSparseArray<DelegateAdapter> mDelegateAdapterSparseArray;
    private int mViewLayoutId = 0;
    private List<ListItem<T>> mItems;

    /*Constructor if we dont use mutiple view types in the list*/
    public BaseAllAdapters(Context context, int viewLayoutId) {
        mContext = context;
        mViewLayoutId = viewLayoutId;
    }

    /*Constructor if we use the delegateAdapter to create multiple view types in the list*/
    public BaseAllAdapters(Context context) {
        mContext = context;
        mDelegateAdapterSparseArray = new LongSparseArray<DelegateAdapter>();
        initDelegates();
        if(mDelegateAdapterSparseArray.size()==0){
             throw new IllegalArgumentException("mDelegateAdapterSparseArray cannot be empty using a multiple view type adapter, If you dont want to specify muliple views, please use the \"BaseAllAdapters(Context context, int viewLayoutId)\" constructor.");
        }
    }


    protected abstract void initDelegates();

    public void clear() {
        mItems.clear();
        notifyDataSetChanged();
    }

    public List<T> getItems() {
        List<T> listItems = new ArrayList<T>();
        for (ListItem<T> listItem : mItems) {
            listItems.add(listItem.getItem());
        }
        return listItems;
    }

    public void setItems(List<T> items) {
        List<ListItem<T>> listItems = Utils.createListItemList(items);
        if (!Objects.equal(items, mItems)) {
            mItems = listItems;
            notifyDataSetChanged();
        }
    }

    @Override
    public int getCount() {
        return mItems != null ? mItems.size() : 0;
    }

    @Override
    public ListItem<T> getItem(int position) {
        return mItems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ListItem<T> item = getItem(position);
        ViewHolder holder;
        if (convertView == null) {
            if (isMultipleViewAdapter()) {
                DelegateAdapter adapter = mDelegateAdapterSparseArray.get(getItemViewType(position));
                convertView = adapter.getView(mContext, position, convertView, parent, LayoutInflater.from(mContext), getItem(position));
            } else {
                convertView = LayoutInflater.from(mContext).inflate(mViewLayoutId, parent, false);
            }
            holder = getHolderInstance(convertView);
            if (holder == null) holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        bindView(position, convertView, item, holder);
        return convertView;
    }

    private boolean isMultipleViewAdapter() {
        return getViewTypeCount() > 1;
    }

    protected abstract void bindView(int position, View convertView, ListItem<T> item, ViewHolder parentHolder);

    protected abstract ViewHolder getHolderInstance(View view);

    public static class ViewHolder {
        public ViewHolder(View view) {
            ButterKnife.inject(this, view);
        }
    }
}

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