android StickyHeaderListView 分组listview，标题停靠

package se.emilsjolander.stickylistheaders; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.content.Context; import android.content.res.TypedArray; import android.database.DataSetObserver; import android.graphics.Canvas; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Parcelable; import android.util.AttributeSet; import android.util.Log; import android.util.SparseBooleanArray; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AbsListView.MultiChoiceModeListener; import android.widget.AbsListView.OnScrollListener; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.FrameLayout; import android.widget.ListView; import android.widget.SectionIndexer; import se.emilsjolander.stickylistheaders.WrapperViewList.LifeCycleListener; import se.emilsjolander.stickylistheaders.sample.R; /** * Even though this is a FrameLayout subclass we it is called a ListView. This * is because of 2 reasons. 1. It acts like as ListView 2. It used to be a * ListView subclass and i did not was to change to name causing compatibility * errors. * * @author Emil Sjölander */ public class StickyListHeadersListView extends FrameLayout { public interface OnHeaderClickListener { void onHeaderClick(StickyListHeadersListView l, View header, int itemPosition, long headerId, boolean currentlySticky); } /** * Notifies the listener when the sticky headers top offset has changed. */ public interface OnStickyHeaderOffsetChangedListener { /** * @param l The view parent * @param header The currently sticky header being offset. * This header is not guaranteed to have it's measurements set. * It is however guaranteed that this view has been measured, * therefor you should user getMeasured* methods instead of * get* methods for determining the view's size. * @param offset The amount the sticky header is offset by towards to top of the screen. */ void onStickyHeaderOffsetChanged(StickyListHeadersListView l, View header, int offset); } /** * Notifies the listener when the sticky header has been updated */ public interface OnStickyHeaderChangedListener { /** * @param l The view parent * @param header The new sticky header view. * @param itemPosition The position of the item within the adapter's data set of * the item whose header is now sticky. * @param headerId The id of the new sticky header. */ void onStickyHeaderChanged(StickyListHeadersListView l, View header, int itemPosition, long headerId); } /* --- Children --- */ private WrapperViewList mList; private View mHeader; /* --- Header state --- */ private Long mHeaderId; // used to not have to call getHeaderId() all the time private Integer mHeaderPosition; private Integer mHeaderOffset; /* --- Delegates --- */ private OnScrollListener mOnScrollListenerDelegate; private AdapterWrapper mAdapter; /* --- Settings --- */ private boolean mAreHeadersSticky = true; private boolean mClippingToPadding = true; private boolean mIsDrawingListUnderStickyHeader = true; private int mPaddingLeft = 0; private int mPaddingTop = 0; private int mPaddingRight = 0; private int mPaddingBottom = 0; /* --- Other --- */ private OnHeaderClickListener mOnHeaderClickListener; private OnStickyHeaderOffsetChangedListener mOnStickyHeaderOffsetChangedListener; private OnStickyHeaderChangedListener mOnStickyHeaderChangedListener; private AdapterWrapperDataSetObserver mDataSetObserver; private Drawable mDivider; private int mDividerHeight; public StickyListHeadersListView(Context context) { this(context, null); } public StickyListHeadersListView(Context context, AttributeSet attrs) { this(context, attrs, 0); } @TargetApi(Build.VERSION_CODES.HONEYCOMB) public StickyListHeadersListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // Initialize the wrapped list mList = new WrapperViewList(context); // null out divider, dividers are handled by adapter so they look good with headers mDivider = mList.getDivider(); mDividerHeight = mList.getDividerHeight(); mList.setDivider(null); mList.setDividerHeight(0); if (attrs != null) { TypedArray a = context.getTheme().obtainStyledAttributes(attrs,R.styleable.StickyListHeadersListView, 0, 0); try { // -- View attributes -- int padding = a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_padding, 0); mPaddingLeft = a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_paddingLeft, padding); mPaddingTop = a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_paddingTop, padding); mPaddingRight = a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_paddingRight, padding); mPaddingBottom = a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_paddingBottom, padding); setPadding(mPaddingLeft, mPaddingTop, mPaddingRight, mPaddingBottom); // Set clip to padding on the list and reset value to default on // wrapper mClippingToPadding = a.getBoolean(R.styleable.StickyListHeadersListView_android_clipToPadding, true); super.setClipToPadding(true); mList.setClipToPadding(mClippingToPadding); // scrollbars final int scrollBars = a.getInt(R.styleable.StickyListHeadersListView_android_scrollbars, 0x00000200); mList.setVerticalScrollBarEnabled((scrollBars & 0x00000200) != 0); mList.setHorizontalScrollBarEnabled((scrollBars & 0x00000100) != 0); // overscroll if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) { mList.setOverScrollMode(a.getInt(R.styleable.StickyListHeadersListView_android_overScrollMode, 0)); } // -- ListView attributes -- mList.setFadingEdgeLength(a.getDimensionPixelSize(R.styleable.StickyListHeadersListView_android_fadingEdgeLength, mList.getVerticalFadingEdgeLength())); final int fadingEdge = a.getInt(R.styleable.StickyListHeadersListView_android_requiresFadingEdge, 0); if (fadingEdge == 0x00001000) { mList.setVerticalFadingEdgeEnabled(false); mList.setHorizontalFadingEdgeEnabled(true); } else if (fadingEdge == 0x00002000) { mList.setVerticalFadingEdgeEnabled(true); mList.setHorizontalFadingEdgeEnabled(false); } else { mList.setVerticalFadingEdgeEnabled(false); mList.setHorizontalFadingEdgeEnabled(false); } mList.setCacheColorHint(a .getColor(R.styleable.StickyListHeadersListView_android_cacheColorHint, mList.getCacheColorHint())); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { mList.setChoiceMode(a.getInt(R.styleable.StickyListHeadersListView_android_choiceMode, mList.getChoiceMode()));