转载请注明出处http://blog.csdn.net/crazy__chen/article/details/45980399
源文件下载地址http://download.csdn.net/detail/kangaroo835127729/8736887
本文主要是贴出xlistview的源代码和一个使用实例，没有过多讲解
使用实例，MainActivity
public class MainActivity extends Activity { private LinkedList<String> listItems = null; private XListView listView = null; private ArrayAdapter<String> adapter; private String[] mStrings = { "Aaaaaa", "Bbbbbb", "Cccccc", "Dddddd", "Eeeeee", "Ffffff", "Gggggg", "Hhhhhh", "Iiiiii", "Jjjjjj", "Kkkkkk", "Llllll", "Mmmmmm", "Nnnnnn", }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listView = (XListView)findViewById(R.id.mlist); listView.setXListViewListener(new IXListViewListener() { @Override public void onRefresh() { new GetDataTask(true).execute(); } @Override public void onLoadMore() { new GetDataTask(false).execute(); } }); listItems = new LinkedList<String>(); listItems.addAll(Arrays.asList(mStrings)); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listItems); listView.setAdapter(adapter); listView.setPullLoadEnable(true); } private class GetDataTask extends AsyncTask<Void, Void, String[]> { private boolean isDropDown; public GetDataTask(boolean isDropDown){ this.isDropDown = isDropDown; } @Override protected String[] doInBackground(Void... params) { try { Thread.sleep(1000); } catch (InterruptedException e) { ; } return mStrings; } @Override protected void onPostExecute(String[] result) { if (isDropDown) { listItems.addFirst("Added after drop down"); adapter.notifyDataSetChanged(); listView.stopRefresh(); } else { listItems.add("Added after on bottom"); adapter.notifyDataSetChanged(); listView.stopLoadMore(); } super.onPostExecute(result); } }}XListView
public class XListView extends ListView implements OnScrollListener { private float mLastY = -1; // save event y /** * 用于下拉后，滑动返回 */ private Scroller mScroller; // used for scroll back private OnScrollListener mScrollListener; // user's scroll listener // the interface to trigger refresh and load more. private IXListViewListener mListViewListener; /** * 下拉头部 */ private XListViewHeader mHeaderView; /** * 下拉头主体，用于计算头部的高度 * 当不能刷新时，被隐藏 */ private RelativeLayout mHeaderViewContent; /** * 下拉箭头 */ private TextView mHeaderTimeView; /** * 下拉头部的高度 */ private int mHeaderViewHeight; /** * 能否下拉刷新 */ private boolean mEnablePullRefresh = true; /** * 是否正在刷新,false表示正在刷新 */ private boolean mPullRefreshing = false; // is refreashing. // -- footer view private XListViewFooter mFooterView; private boolean mEnablePullLoad; private boolean mPullLoading; private boolean mIsFooterReady = false; // total list items, used to detect is at the bottom of listview. private int mTotalItemCount; // for mScroller, scroll back from header or footer. private int mScrollBack; /** * 头部滑动返回 */ private final static int SCROLLBACK_HEADER = 0; /** * footer滑动返回 */ private final static int SCROLLBACK_FOOTER = 1; private final static int SCROLL_DURATION = 400; // scroll back duration private final static int PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px // at bottom, trigger // load more. private final static float OFFSET_RADIO = 1.8f; // support iOS like pull // feature. /** * @param context */ public XListView(Context context) { super(context); initWithContext(context); } public XListView(Context context, AttributeSet attrs) { super(context, attrs); initWithContext(context); } public XListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initWithContext(context); } private void initWithContext(Context context) { mScroller = new Scroller(context, new DecelerateInterpolator()); // XListView need the scroll event, and it will dispatch the event to // user's listener (as a proxy). super.setOnScrollListener(this); //初始化下拉头 mHeaderView = new XListViewHeader(context); mHeaderViewContent = (RelativeLayout) mHeaderView .findViewById(R.id.xlistview_header_content); mHeaderTimeView = (TextView) mHeaderView .findViewById(R.id.xlistview_header_time); addHeaderView(mHeaderView); //初始化底部 mFooterView = new XListViewFooter(context); //初始化下拉头高度 mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener( new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { mHeaderViewHeight = mHeaderViewContent.getHeight();//获得下拉头的高度 getViewTreeObserver() .removeGlobalOnLayoutListener(this); } }); } @Override public void setAdapter(ListAdapter adapter) { /* * 将上拉加载更多footer加入listview的底部 * 并且保证只加入一次 */ if (mIsFooterReady == false) { mIsFooterReady = true; addFooterView(mFooterView);//listview原生方法 } super.setAdapter(adapter); } /** * 设置下拉刷新功能是否开启 * @param enable */ public void setPullRefreshEnable(boolean enable) { mEnablePullRefresh = enable; if (!mEnablePullRefresh) {//不开启，隐藏头部 mHeaderViewContent.setVisibility(View.INVISIBLE); } else { mHeaderViewContent.setVisibility(View.VISIBLE); } } /** * 设置上拉加载更多功能是否开启 * 如果要开启，必须主动调用这个函数 * @param enable */ public void setPullLoadEnable(boolean enable) { mEnablePullLoad = enable; if (!mEnablePullLoad) {//如果不开启 mFooterView.hide();//隐藏footer mFooterView.setOnClickListener(null);//取消监听 //make sure "pull up" don't show a line in bottom when listview with one page //保证listview的item之间的分割线消失(最后一条) setFooterDividersEnabled(false);//listview原生方法 } else { mPullLoading = false; mFooterView.show(); mFooterView.setState(XListViewFooter.STATE_NORMAL); //make sure "pull up" don't show a line in bottom when listview with one page setFooterDividersEnabled(true); // both "pull up" and "click" will invoke load more. mFooterView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { startLoadMore(); } }); } } /** * stop refresh, reset header view. * 停止刷新，重置头部 */ public void stopRefresh() { if (mPullRefreshing == true) { mPullRefreshing = false; resetHeaderHeight(); } } /** * stop load more, reset footer view. * 停止加载更多，重置footer */ public void stopLoadMore() { if (mPullLoading == true) { mPullLoading = false; mFooterView.setState(XListViewFooter.STATE_NORMAL); } } /** * set last refresh time * 设置最后一次下来刷新时间 * @param time */ public void setRefreshTime(String time) { mHeaderTimeView.setText(time); } private void invokeOnScrolling() { if (mScrollListener instanceof OnXScrollListener) { OnXScrollListener l = (OnXScrollListener) mScrollListener; l.onXScrolling(this); } } /** * 更新头部高度 * 这个函数用于下拉时，记录下拉了多少 * @param delta */ private void updateHeaderHeight(float delta) { mHeaderView.setVisiableHeight((int) delta + mHeaderView.getVisiableHeight()); if (mEnablePullRefresh && !mPullRefreshing) {//未处于刷新状态，更新箭头 if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) { mHeaderView.setState(XListViewHeader.STATE_READY); } else { mHeaderView.setState(XListViewHeader.STATE_NORMAL); } } //滑动到头部 setSelection(0); // scroll to top each time } /** * reset header view's height. * 重置头部高度 */ private void resetHeaderHeight() { int height = mHeaderView.getVisiableHeight(); if (height == 0) // not visible. return; // refreshing and header isn't shown fully. do nothing. //正在刷新，或者头部没有完全显示，返回 if (mPullRefreshing && height <= mHeaderViewHeight) { return; } int finalHeight = 0; // 默认最终高度，也就是说要让头部消失 // is refreshing, just scroll back to show all the header. //正在刷新，并且下拉头部完全显示 if (mPullRefreshing && height > mHeaderViewHeight) { finalHeight = mHeaderViewHeight; } mScrollBack = SCROLLBACK_HEADER; //从当前位置，返回到头部被隐藏 mScroller.startScroll(0, height, 0, finalHeight - height, SCROLL_DURATION); // trigger computeScroll invalidate(); } /** * 更新footer离底部的距离 * @param delta */ private void updateFooterHeight(float delta) { int height = mFooterView.getBottomMargin() + (int) delta; if (mEnablePullLoad && !mPullLoading) { if (height > PULL_LOAD_MORE_DELTA) { // height enough to invoke load上拉足够高才去加载 // more. mFooterView.setState(XListViewFooter.STATE_READY); } else { mFooterView.setState(XListViewFooter.STATE_NORMAL); } } mFooterView.setBottomMargin(height);// setSelection(mTotalItemCount - 1); // scroll to bottom } /** * 重置footer位置 */ private void resetFooterHeight() { int bottomMargin = mFooterView.getBottomMargin(); if (bottomMargin > 0) { mScrollBack = SCROLLBACK_FOOTER; mScroller.startScroll(0, bottomMargin, 0, -bottomMargin, SCROLL_DURATION); invalidate(); } } private void startLoadMore() { mPullLoading = true; mFooterView.setState(XListViewFooter.STATE_LOADING); if (mListViewListener != null) { mListViewListener.onLoadMore(); } } @Override public boolean onTouchEvent(MotionEvent ev) { if (mLastY == -1) {//获得触摸时的y坐标 mLastY = ev.getRawY(); } switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: mLastY = ev.getRawY(); break; case MotionEvent.ACTION_MOVE: final float deltaY = ev.getRawY() - mLastY;//下拉或者上拉了多少offset mLastY = ev.getRawY(); if (getFirstVisiblePosition() == 0 && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {//第一个item可见并且头部部分显示或者下拉操作,则表示处于下拉刷新状态 // the first item is showing, header has shown or pull down. updateHeaderHeight(deltaY / OFFSET_RADIO); invokeOnScrolling(); } else if (getLastVisiblePosition() == mTotalItemCount - 1 && (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {//最后一个item可见并且footer被上拉显示或者上拉操作,则表示处于上拉刷新状态 // last item, already pulled up or want to pull up. updateFooterHeight(-deltaY / OFFSET_RADIO); } break; default://action_up mLastY = -1; // reset if (getFirstVisiblePosition() == 0) { // invoke refresh if (mEnablePullRefresh && mHeaderView.getVisiableHeight() > mHeaderViewHeight) { mPullRefreshing = true; mHeaderView.setState(XListViewHeader.STATE_REFRESHING); if (mListViewListener != null) { mListViewListener.onRefresh(); } } resetHeaderHeight(); } else if (getLastVisiblePosition() == mTotalItemCount - 1) { // invoke load more. if (mEnablePullLoad && mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA && !mPullLoading) { startLoadMore(); } resetFooterHeight(); } break; } return super.onTouchEvent(ev); } @Override public void computeScroll() { if (mScroller.computeScrollOffset()) { if (mScrollBack == SCROLLBACK_HEADER) { mHeaderView.setVisiableHeight(mScroller.getCurrY()); } else { mFooterView.setBottomMargin(mScroller.getCurrY()); } postInvalidate(); invokeOnScrolling(); } super.computeScroll(); } @Override public void setOnScrollListener(OnScrollListener l) { mScrollListener = l; } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { if (mScrollListener != null) { mScrollListener.onScrollStateChanged(view, scrollState); } } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { // send to user's listener mTotalItemCount = totalItemCount; if (mScrollListener != null) { mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount); } } public void setXListViewListener(IXListViewListener l) { mListViewListener = l; } /** * you can listen ListView.OnScrollListener or this one. it will invoke * onXScrolling when header/footer scroll back. */ public interface OnXScrollListener extends OnScrollListener { public void onXScrolling(View view); } /** * implements this interface to get refresh/load more event. * 下拉和上拉监听器 */ public interface IXListViewListener { public void onRefresh(); public void onLoadMore(); }}XListViewHeader
public class XListViewHeader extends LinearLayout { /** * 下拉布局主体 */ private LinearLayout mContainer; /** * 下拉箭头 */ private ImageView mArrowImageView; /** * 环形进度条 */ private ProgressBar mProgressBar; /** * 提示文本 */ private TextView mHintTextView; private int mState = STATE_NORMAL; private Animation mRotateUpAnim; private Animation mRotateDownAnim; /** * 动画时间 */ private final int ROTATE_ANIM_DURATION = 180; public final static int STATE_NORMAL = 0;//普通状态 public final static int STATE_READY = 1;//下拉准备刷新 public final static int STATE_REFRESHING = 2;//正在加载 public XListViewHeader(Context context) { super(context); initView(context); } /** * @param context * @param attrs */ public XListViewHeader(Context context, AttributeSet attrs) { super(context, attrs); initView(context); } private void initView(Context context) { // 初始情况，设置下拉刷新view高度为0 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LayoutParams.FILL_PARENT, 0); mContainer = (LinearLayout) LayoutInflater.from(context).inflate( R.layout.xlistview_header, null); addView(mContainer, lp); setGravity(Gravity.BOTTOM); mArrowImageView = (ImageView)findViewById(R.id.xlistview_header_arrow); mHintTextView = (TextView)findViewById(R.id.xlistview_header_hint_textview); mProgressBar = (ProgressBar)findViewById(R.id.xlistview_header_progressbar); //旋转动画 mRotateUpAnim = new RotateAnimation(0.0f, -180.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); //设置动画时间 mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION); //动画终止时停留在最后一帧,也就是保留动画以后的状态 mRotateUpAnim.setFillAfter(true); //旋转动画 mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION); mRotateDownAnim.setFillAfter(true); } public void setState(int state) { if (state == mState) return ; if (state == STATE_REFRESHING) {// 显示进度 mArrowImageView.clearAnimation(); mArrowImageView.setVisibility(View.INVISIBLE); mProgressBar.setVisibility(View.VISIBLE); } else {// 显示箭头图片 mArrowImageView.setVisibility(View.VISIBLE); mProgressBar.setVisibility(View.INVISIBLE); } switch(state){ case STATE_NORMAL: if (mState == STATE_READY) { mArrowImageView.startAnimation(mRotateDownAnim); } if (mState == STATE_REFRESHING) { mArrowImageView.clearAnimation(); } mHintTextView.setText(R.string.xlistview_header_hint_normal); break; case STATE_READY: if (mState != STATE_READY) { mArrowImageView.clearAnimation(); mArrowImageView.startAnimation(mRotateUpAnim); mHintTextView.setText(R.string.xlistview_header_hint_ready); } break; case STATE_REFRESHING: mHintTextView.setText(R.string.xlistview_header_hint_loading); break; default: } mState = state; } /** * 设置下拉头有效高度 * @param height */ public void setVisiableHeight(int height) { if (height < 0) height = 0; LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContainer .getLayoutParams(); lp.height = height; mContainer.setLayoutParams(lp); } /** * 获得下拉头有效高度 * @return */ public int getVisiableHeight() { return mContainer.getLayoutParams().height; }}XListViewFooter
public class XListViewFooter extends LinearLayout { public final static int STATE_NORMAL = 0;//普通状态 public final static int STATE_READY = 1;//上拉准备刷新 public final static int STATE_LOADING = 2;//正在加载 private Context mContext; private View mContentView; private View mProgressBar; private TextView mHintView; public XListViewFooter(Context context) { super(context); initView(context); } public XListViewFooter(Context context, AttributeSet attrs) { super(context, attrs); initView(context); } /** * 设置状态 * @param state */ public void setState(int state) { mHintView.setVisibility(View.INVISIBLE); mProgressBar.setVisibility(View.INVISIBLE); mHintView.setVisibility(View.INVISIBLE); if (state == STATE_READY) { mHintView.setVisibility(View.VISIBLE); mHintView.setText(R.string.xlistview_footer_hint_ready); } else if (state == STATE_LOADING) { mProgressBar.setVisibility(View.VISIBLE); } else { mHintView.setVisibility(View.VISIBLE); mHintView.setText(R.string.xlistview_footer_hint_normal); } } /** * 设置footer里底部的高度 * @param height */ public void setBottomMargin(int height) { if (height < 0) return ; LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams(); lp.bottomMargin = height; mContentView.setLayoutParams(lp); } /** * 获得footer里底部的高度 * @return */ public int getBottomMargin() { LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams(); return lp.bottomMargin; } /** * normal status */ public void normal() { mHintView.setVisibility(View.VISIBLE); mProgressBar.setVisibility(View.GONE); } /** * loading status */ public void loading() { mHintView.setVisibility(View.GONE); mProgressBar.setVisibility(View.VISIBLE); } /** * hide footer when disable pull load more */ public void hide() { LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams(); lp.height = 0; mContentView.setLayoutParams(lp); } /** * show footer */ public void show() { LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams(); lp.height = LayoutParams.WRAP_CONTENT; mContentView.setLayoutParams(lp); } /** * 初始化布局 * @param context */ private void initView(Context context) { mContext = context; LinearLayout moreView = (LinearLayout)LayoutInflater.from(mContext).inflate(R.layout.xlistview_footer, null); addView(moreView); moreView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); mContentView = moreView.findViewById(R.id.xlistview_footer_content); mProgressBar = moreView.findViewById(R.id.xlistview_footer_progressbar); mHintView = (TextView)moreView.findViewById(R.id.xlistview_footer_hint_textview); } }