Android Open Source - Android-IndexListview Section List View

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License

The source code is released under:

Apache License

Java Source Code

package com.cw.indexlistview.widget;
/* www  . j a  v a  2  s .  co m*/
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewParent;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.FrameLayout;
import android.widget.ListAdapter;
import android.widget.ListView;

/**
 * View displaying the list with sectioned header.
 */
public class SectionListView extends ListView implements OnScrollListener {

    private View transparentView;
    private Context mContext;

    public SectionListView(final Context context, final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        commonInitialisation();
    }

    public SectionListView(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        commonInitialisation();
    }

    public SectionListView(final Context context) {
        super(context);
        mContext = context;
        commonInitialisation();
    }

    protected final void commonInitialisation()
    {
        setOnScrollListener(this);
        setVerticalFadingEdgeEnabled(false);
        setFadingEdgeLength(0);
    }

    @Override
    public void setAdapter(final ListAdapter adapter)
    {
        if (!(adapter instanceof SectionListAdapter)) { throw new IllegalArgumentException("The adapter needds to be of type "
                + SectionListAdapter.class + " and is " + adapter.getClass()); }
        super.setAdapter(adapter);
        final ViewParent parent = getParent();
        if (!(parent instanceof FrameLayout)) { throw new IllegalStateException("Section List should have FrameLayout as parent!"); }
        if (transparentView != null) {
            ((FrameLayout)parent).removeView(transparentView);
        }
        transparentView = ((SectionListAdapter)adapter).getTransparentSectionView();
        @SuppressWarnings("deprecation")
        final FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
        ((FrameLayout)parent).addView(transparentView, lp);
        if (adapter.isEmpty()) {
            transparentView.setVisibility(View.INVISIBLE);
        }
    }

    @Override
    public void onScroll(final AbsListView view, final int firstVisibleItem, final int visibleItemCount, final int totalItemCount)
    {
        final SectionListAdapter adapter = (SectionListAdapter)getAdapter();
        if (adapter != null) {
            adapter.makeSectionInvisibleIfFirstInList(firstVisibleItem);
        }
    }

    @Override
    public void onScrollStateChanged(final AbsListView view, final int scrollState)
    {
        // do nothing
    }

}

Java Source Code List

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