Android Open Source - dialogplus Simple List View

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License

The source code is released under:

Apache License

Java Source Code

package com.orhanobut.dialogplus;
/*  ww w  . j  a  v  a 2 s .c  o  m*/
import android.content.Context;
import android.database.DataSetObserver;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

/**
 * @author Orhan Obut
 */
public class SimpleListView extends LinearLayout {


    /**
     * Invalid flag for the resources
     */
    private static final int INVALID = -1;
    /**
     * Adapter that stores all row items
     */
    private BaseAdapter adapter;
    /**
     * Observer for the data changes
     */
    private DataSetObserver dataSetObserver;
    /**
     * Layout inflater to create views
     */
    private final LayoutInflater layoutInflater;
    /**
     * It is used to separate items if it is set
     */
    private int dividerViewResourceId = INVALID;
    /**
     * Determines if the header and footer view should be added
     */
    private View headerView;
    private View footerView;
    /**
     * Special item click listener in order to allow to user to take an action
     */
    private OnItemClickListener itemClickListener;
    public SimpleListView(Context context) {
        this(context, null);
    }
    public SimpleListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        layoutInflater = LayoutInflater.from(getContext());
        setOrientation(VERTICAL);
    }
    public void setDividerView(int resourceId) {
        dividerViewResourceId = resourceId;
    }
    public void setOnItemClickListener(OnItemClickListener listener) {
        this.itemClickListener = listener;
    }
    public void setHeaderView(View view) {
        headerView = view;
    }
    public void setHeaderView(int resourceId) {
        headerView = layoutInflater.inflate(resourceId, this, false);
    }
    public void setFooterView(View view) {
        footerView = view;
    }
    public void setFooterView(int resourceId) {
        footerView = layoutInflater.inflate(resourceId, this, false);
    }
    public void setAdapter(BaseAdapter adapter) {
        if (adapter == null) {
            throw new NullPointerException("Adapter may not be null");
        }
        if (this.adapter != null && this.dataSetObserver != null) {
            adapter.unregisterDataSetObserver(dataSetObserver);
        }
        this.adapter = adapter;
        this.dataSetObserver = new AdapterDataSetObserver();
        this.adapter.registerDataSetObserver(dataSetObserver);
        resetList();
        refreshList();
    }
    /**
     * It is called when the notifyDataSetChanged or first initialize
     */
    private void refreshList() {
        if (headerView != null) {
            addView(headerView);
        }
        int count = adapter.getCount();
        for (int i = 0; i < count; i++) {
            final View view = adapter.getView(i, null, this);
            final int position = i;
            if (itemClickListener != null) {
                view.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        itemClickListener.onItemClick(adapter.getItem(position), view, position);
                    }
                });
            }
            addView(view);
            if (dividerViewResourceId != INVALID && i != count - 1) {
                addView(layoutInflater.inflate(dividerViewResourceId, this, false));
            }
        }
        if (footerView != null) {
            addView(footerView);
        }
    }
    /**
     * Clears everything
     */
    private void resetList() {
        this.removeAllViews();
        invalidate();
    }
    /**
     * observe data set changes, when the adapter notifyDataSetChanged method called, onChanged
     * method will be called and view will be refreshed.
     */
    class AdapterDataSetObserver extends DataSetObserver {
        @Override
        public void onChanged() {
            super.onChanged();
            resetList();
            refreshList();
        }
    }
    public interface OnItemClickListener {
        public void onItemClick(Object item, View view, int position);
    }
}

Java Source Code List

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