Android学习之listview的下拉刷新、上拉载入
内容导读
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内容图文
本例是在上例的基础上完成的。本例实现的listview上拉载入、下拉刷新功能，是在开源网站上别人写好的listview，主要是对listview的控件进行重写，添加了footer和header。
1.listview_footer
listview_footer是listview的底部。
1
<?
xml version="1.0" encoding="utf-8"
?>
2
<
LinearLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
3
android:layout_width
="fill_parent"
4
android:layout_height
="wrap_content"
>
5
6
<
RelativeLayout
7
android:id
="@+id/xlistview_footer_content"
8
android:layout_width
="fill_parent"
9
android:layout_height
="wrap_content"
10
android:padding
="10dp"
>
11
12
<
ProgressBar
13
android:id
="@+id/xlistview_footer_progressbar"
14
android:layout_width
="wrap_content"
15
android:layout_height
="wrap_content"
16
android:layout_centerInParent
="true"
17
android:visibility
="invisible"
/>
18
19
<
TextView
20
android:id
="@+id/xlistview_footer_hint_textview"
21
android:layout_width
="wrap_content"
22
android:layout_height
="wrap_content"
23
android:layout_centerInParent
="true"
24
android:text
="@string/xlistview_footer_hint_normal"
/>
25
</
RelativeLayout
>
26
27
</
LinearLayout
>
listview_footer由ProgressBar和textview组成。用户点击textview或者上拉的时候，会触发监听事件，实现更多数据的载入。
1
public
final
static
int STATE_NORMAL = 0;
2publicfinalstaticint STATE_READY = 1;
3publicfinalstaticint STATE_LOADING = 2;
4 5private Context mContext;
6 7private View mContentView;
8private View mProgressBar;
9private TextView mHintView;
1011public XListViewFooter(Context context) {
12super(context);
13 initView(context);
14 }
1516public XListViewFooter(Context context, AttributeSet attrs) {
17super(context, attrs);
18 initView(context);
19 }
202122publicvoid setState(int state) {
23 mHintView.setVisibility(View.INVISIBLE);
24 mProgressBar.setVisibility(View.INVISIBLE);
25 mHintView.setVisibility(View.INVISIBLE);
26if (state == STATE_READY) {
27 mHintView.setVisibility(View.VISIBLE);
28 mHintView.setText(R.string.xlistview_footer_hint_ready);
29 } elseif (state == STATE_LOADING) {
30 mProgressBar.setVisibility(View.VISIBLE);
31 } else {
32 mHintView.setVisibility(View.VISIBLE);
33 mHintView.setText(R.string.xlistview_footer_hint_normal);
34 }
35 }
3637publicvoid setBottomMargin(int height) {
38if (height < 0) return ;
39 LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
40 lp.bottomMargin = height;
41 mContentView.setLayoutParams(lp);
42 }
4344publicint getBottomMargin() {
45 LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
46return lp.bottomMargin;
47 }
4849/**50 * normal status
51*/52publicvoid normal() {
53 mHintView.setVisibility(View.VISIBLE);
54 mProgressBar.setVisibility(View.GONE);
55 }
565758/**59 * loading status
60*/61publicvoid loading() {
62 mHintView.setVisibility(View.GONE);
63 mProgressBar.setVisibility(View.VISIBLE);
64 }
6566/**67 * hide footer when disable pull load more
68*/69publicvoid hide() {
70 LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
71 lp.height = 0;
72 mContentView.setLayoutParams(lp);
73 }
7475/**76 * show footer
77*/78publicvoid show() {
79 LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
80 lp.height = LayoutParams.WRAP_CONTENT;
81 mContentView.setLayoutParams(lp);
82 }
8384privatevoid initView(Context context) {
85 mContext = context;
86 LinearLayout moreView = (LinearLayout)LayoutInflater.from(mContext).inflate(R.layout.xlistview_footer, null);
87 addView(moreView);
88 moreView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
8990 mContentView = moreView.findViewById(R.id.xlistview_footer_content);
91 mProgressBar = moreView.findViewById(R.id.xlistview_footer_progressbar);
92 mHintView = (TextView)moreView.findViewById(R.id.xlistview_footer_hint_textview);
93 }
后台代码定义了listview_footer的状态变化，包括加载、停止加载等，实现了对事件的监听。
2.listview_header
listview_header是listview显示的时候头部文件。用户下拉的时候，实现数据的重新载入。
1
<?
xml version="1.0" encoding="utf-8"
?>
2
<
LinearLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
3
android:layout_width
="fill_parent"
4
android:layout_height
="wrap_content"
5
android:gravity
="bottom"
>
6
7
<
RelativeLayout
8
android:id
="@+id/xlistview_header_content"
9
android:layout_width
="fill_parent"
10
android:layout_height
="60dp"
>
11
12
<
LinearLayout
13
android:layout_width
="wrap_content"
14
android:layout_height
="wrap_content"
15
android:layout_centerInParent
="true"
16
android:gravity
="center"
17
android:orientation
="vertical"
android:id
="@+id/xlistview_header_text"
>
18
19
<
TextView
20
android:id
="@+id/xlistview_header_hint_textview"
21
android:layout_width
="wrap_content"
22
android:layout_height
="wrap_content"
23
android:text
="@string/xlistview_header_hint_normal"
/>
24
25
<
LinearLayout
26
android:layout_width
="wrap_content"
27
android:layout_height
="wrap_content"
28
android:layout_marginTop
="3dp"
>
29
30
<
TextView
31
android:layout_width
="wrap_content"
32
android:layout_height
="wrap_content"
33
android:text
="@string/xlistview_header_last_time"
34
android:textSize
="12sp"
/>
35
36
<
TextView
37
android:id
="@+id/xlistview_header_time"
38
android:layout_width
="wrap_content"
39
android:layout_height
="wrap_content"
40
android:textSize
="12sp"
/>
41
</
LinearLayout
>
42
</
LinearLayout
>
43
44
<
ImageView
45
android:id
="@+id/xlistview_header_arrow"
46
android:layout_width
="wrap_content"
47
android:layout_height
="wrap_content"
48
android:layout_alignLeft
="@id/xlistview_header_text"
49
android:layout_centerVertical
="true"
50
android:layout_marginLeft
="-35dp"
51
android:src
="@drawable/xlistview_arrow"
/>
52
53
<
ProgressBar
54
android:id
="@+id/xlistview_header_progressbar"
55
android:layout_width
="30dp"
56
android:layout_height
="30dp"
57
android:layout_alignLeft
="@id/xlistview_header_text"
58
android:layout_centerVertical
="true"
59
android:layout_marginLeft
="-40dp"
60
android:visibility
="invisible"
/>
61
</
RelativeLayout
>
62
63
</
LinearLayout
>
xml部分由textview和imageview组成。
1
private
LinearLayout mContainer;
2
private
ImageView mArrowImageView;
3
private
ProgressBar mProgressBar;
4
private
TextView mHintTextView;
5
private
int mState = STATE_NORMAL;
6 7private Animation mRotateUpAnim;
8private Animation mRotateDownAnim;
9 10privatefinalint ROTATE_ANIM_DURATION = 180;
11 12publicfinalstaticint STATE_NORMAL = 0;
13publicfinalstaticint STATE_READY = 1;
14publicfinalstaticint STATE_REFRESHING = 2;
15 16public XListViewHeader(Context context) {
17super(context);
18 initView(context);
19 }
20 21/** 22 * @param context
23 * @param attrs
24*/ 25public XListViewHeader(Context context, AttributeSet attrs) {
26super(context, attrs);
27 initView(context);
28 }
29 30privatevoid initView(Context context) {
31// 鍒濆鎯呭喌锛岃缃笅鎷夊埛鏂皏iew楂樺害涓? 32 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
33 LayoutParams.FILL_PARENT, 0);
34 mContainer = (LinearLayout) LayoutInflater.from(context).inflate(
35 R.layout.xlistview_header, null);
36 addView(mContainer, lp);
37 setGravity(Gravity.BOTTOM);
38 39 mArrowImageView = (ImageView)findViewById(R.id.xlistview_header_arrow);
40 mHintTextView = (TextView)findViewById(R.id.xlistview_header_hint_textview);
41 mProgressBar = (ProgressBar)findViewById(R.id.xlistview_header_progressbar);
42 43 mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,
44 Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
45 0.5f);
46 mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
47 mRotateUpAnim.setFillAfter(true);
48 mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f,
49 Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
50 0.5f);
51 mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);
52 mRotateDownAnim.setFillAfter(true);
53 }
54 55publicvoid setState(int state) {
56if (state == mState) return ;
57 58if (state == STATE_REFRESHING) { // 鏄剧ず杩涘害 59 mArrowImageView.clearAnimation();
60 mArrowImageView.setVisibility(View.INVISIBLE);
61 mProgressBar.setVisibility(View.VISIBLE);
62 } else { // 鏄剧ず绠ご鍥剧墖 63 mArrowImageView.setVisibility(View.VISIBLE);
64 mProgressBar.setVisibility(View.INVISIBLE);
65 }
66 67switch(state){
68case STATE_NORMAL:
69if (mState == STATE_READY) {
70 mArrowImageView.startAnimation(mRotateDownAnim);
71 }
72if (mState == STATE_REFRESHING) {
73 mArrowImageView.clearAnimation();
74 }
75 mHintTextView.setText(R.string.xlistview_header_hint_normal);
76break;
77case STATE_READY:
78if (mState != STATE_READY) {
79 mArrowImageView.clearAnimation();
80 mArrowImageView.startAnimation(mRotateUpAnim);
81 mHintTextView.setText(R.string.xlistview_header_hint_ready);
82 }
83break;
84case STATE_REFRESHING:
85 mHintTextView.setText(R.string.xlistview_header_hint_loading);
86break;
87default:
88 }
89 90 mState = state;
91 }
92 93publicvoid setVisiableHeight(int height) {
94if (height < 0)
95 height = 0;
96 LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContainer
97 .getLayoutParams();
98 lp.height = height;
99 mContainer.setLayoutParams(lp);
100 }
101102publicint getVisiableHeight() {
103return mContainer.getHeight();
104 }
后台通过状态的改变，控制header的高度。
3.xlistview
xlistview是对listview控件的重写
1
public
class XListView extends ListView implements OnScrollListener {
2 3privatefloat mLastY = -1; // save event y 4private Scroller mScroller; // used for scroll back 5private OnScrollListener mScrollListener; // user‘s scroll listener
6 7// the interface to trigger refresh and load more. 8private IXListViewListener mListViewListener;
9 10// -- header view 11private XListViewHeader mHeaderView;
12// header view content, use it to calculate the Header‘s height. And hide it
13// when disable pull refresh. 14private RelativeLayout mHeaderViewContent;
15private TextView mHeaderTimeView;
16privateint mHeaderViewHeight; // header view‘s height 17privateboolean mEnablePullRefresh = true;
18privateboolean mPullRefreshing = false; // is refreashing.
19 20// -- footer view 21private XListViewFooter mFooterView;
22privateboolean mEnablePullLoad;
23privateboolean mPullLoading;
24privateboolean mIsFooterReady = false;
25 26// total list items, used to detect is at the bottom of listview. 27privateint mTotalItemCount;
28 29// for mScroller, scroll back from header or footer. 30privateint mScrollBack;
31privatefinalstaticint SCROLLBACK_HEADER = 0;
32privatefinalstaticint SCROLLBACK_FOOTER = 1;
33 34privatefinalstaticint SCROLL_DURATION = 400; // scroll back duration 35privatefinalstaticint PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px
36// at bottom, trigger
37// load more. 38privatefinalstaticfloat OFFSET_RADIO = 1.8f; // support iOS like pull
39// feature. 40 41/** 42 * @param context
43*/ 44public XListView(Context context) {
45super(context);
46 initWithContext(context);
47 }
48 49public XListView(Context context, AttributeSet attrs) {
50super(context, attrs);
51 initWithContext(context);
52 }
53 54public XListView(Context context, AttributeSet attrs, int defStyle) {
55super(context, attrs, defStyle);
56 initWithContext(context);
57 }
58 59privatevoid initWithContext(Context context) {
60 mScroller = new Scroller(context, new DecelerateInterpolator());
61// XListView need the scroll event, and it will dispatch the event to
62// user‘s listener (as a proxy). 63super.setOnScrollListener(this);
64 65// init header view 66 mHeaderView = new XListViewHeader(context);
67 mHeaderViewContent = (RelativeLayout) mHeaderView
68 .findViewById(R.id.xlistview_header_content);
69 mHeaderTimeView = (TextView) mHeaderView
70 .findViewById(R.id.xlistview_header_time);
71 addHeaderView(mHeaderView);
72 73// init footer view 74 mFooterView = new XListViewFooter(context);
75 76// init header height 77 mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
78new OnGlobalLayoutListener() {
79 @SuppressWarnings("deprecation")
80 @Override
81publicvoid onGlobalLayout() {
82 mHeaderViewHeight = mHeaderViewContent.getHeight();
83 getViewTreeObserver()
84 .removeGlobalOnLayoutListener(this);
85 }
86 });
87 }
88 89 @Override
90publicvoid setAdapter(ListAdapter adapter) {
91// make sure XListViewFooter is the last footer view, and only add once. 92if (mIsFooterReady == false) {
93 mIsFooterReady = true;
94 addFooterView(mFooterView);
95 }
96super.setAdapter(adapter);
97 }
98 99/**100 * enable or disable pull down refresh feature.
101 *
102 * @param enable
103*/104publicvoid setPullRefreshEnable(boolean enable) {
105 mEnablePullRefresh = enable;
106if (!mEnablePullRefresh) { // disable, hide the content107 mHeaderViewContent.setVisibility(View.INVISIBLE);
108 } else {
109 mHeaderViewContent.setVisibility(View.VISIBLE);
110 }
111 }
112113/**114 * enable or disable pull up load more feature.
115 *
116 * @param enable
117*/118publicvoid setPullLoadEnable(boolean enable) {
119 mEnablePullLoad = enable;
120if (!mEnablePullLoad) {
121 mFooterView.hide();
122 mFooterView.setOnClickListener(null);
123 } else {
124 mPullLoading = false;
125 mFooterView.show();
126 mFooterView.setState(XListViewFooter.STATE_NORMAL);
127// both "pull up" and "click" will invoke load more.128 mFooterView.setOnClickListener(new OnClickListener() {
129 @Override
130publicvoid onClick(View v) {
131 startLoadMore();
132 }
133 });
134 }
135 }
136137/**138 * stop refresh, reset header view.
139*/140publicvoid stopRefresh() {
141if (mPullRefreshing == true) {
142 mPullRefreshing = false;
143 resetHeaderHeight();
144 }
145 }
146147/**148 * stop load more, reset footer view.
149*/150publicvoid stopLoadMore() {
151if (mPullLoading == true) {
152 mPullLoading = false;
153 mFooterView.setState(XListViewFooter.STATE_NORMAL);
154 }
155 }
156157/**158 * set last refresh time
159 *
160 * @param time
161*/162publicvoid setRefreshTime(String time) {
163 mHeaderTimeView.setText(time);
164 }
165166privatevoid invokeOnScrolling() {
167if (mScrollListener instanceof OnXScrollListener) {
168 OnXScrollListener l = (OnXScrollListener) mScrollListener;
169 l.onXScrolling(this);
170 }
171 }
172173privatevoid updateHeaderHeight(float delta) {
174 mHeaderView.setVisiableHeight((int) delta
175 + mHeaderView.getVisiableHeight());
176if (mEnablePullRefresh && !mPullRefreshing) { // 鏈浜庡埛鏂扮姸鎬侊紝鏇存柊绠ご177if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
178 mHeaderView.setState(XListViewHeader.STATE_READY);
179 } else {
180 mHeaderView.setState(XListViewHeader.STATE_NORMAL);
181 }
182 }
183 setSelection(0); // scroll to top each time184 }
185186/**187 * reset header view‘s height.
188*/189privatevoid resetHeaderHeight() {
190int height = mHeaderView.getVisiableHeight();
191if (height == 0) // not visible.192return;
193// refreshing and header isn‘t shown fully. do nothing.194if (mPullRefreshing && height <= mHeaderViewHeight) {
195return;
196 }
197int finalHeight = 0; // default: scroll back to dismiss header.
198// is refreshing, just scroll back to show all the header.199if (mPullRefreshing && height > mHeaderViewHeight) {
200 finalHeight = mHeaderViewHeight;
201 }
202 mScrollBack = SCROLLBACK_HEADER;
203 mScroller.startScroll(0, height, 0, finalHeight - height,
204 SCROLL_DURATION);
205// trigger computeScroll206 invalidate();
207 }
208209privatevoid updateFooterHeight(float delta) {
210int height = mFooterView.getBottomMargin() + (int) delta;
211if (mEnablePullLoad && !mPullLoading) {
212if (height > PULL_LOAD_MORE_DELTA) { // height enough to invoke load
213// more.214 mFooterView.setState(XListViewFooter.STATE_READY);
215 } else {
216 mFooterView.setState(XListViewFooter.STATE_NORMAL);
217 }
218 }
219 mFooterView.setBottomMargin(height);
220221// setSelection(mTotalItemCount - 1); // scroll to bottom222 }
223224privatevoid resetFooterHeight() {
225int bottomMargin = mFooterView.getBottomMargin();
226if (bottomMargin > 0) {
227 mScrollBack = SCROLLBACK_FOOTER;
228 mScroller.startScroll(0, bottomMargin, 0, -bottomMargin,
229 SCROLL_DURATION);
230 invalidate();
231 }
232 }
233234privatevoid startLoadMore() {
235 mPullLoading = true;
236 mFooterView.setState(XListViewFooter.STATE_LOADING);
237if (mListViewListener != null) {
238 mListViewListener.onLoadMore();
239 }
240 }
241242 @Override
243publicboolean onTouchEvent(MotionEvent ev) {
244if (mLastY == -1) {
245 mLastY = ev.getRawY();
246 }
247248switch (ev.getAction()) {
249case MotionEvent.ACTION_DOWN:
250 mLastY = ev.getRawY();
251break;
252case MotionEvent.ACTION_MOVE:
253finalfloat deltaY = ev.getRawY() - mLastY;
254 mLastY = ev.getRawY();
255 System.out.println(getFirstVisiblePosition() + "---->"
256 + getLastVisiblePosition());
257if (getFirstVisiblePosition() == 0
258 && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
259// the first item is showing, header has shown or pull down.260 updateHeaderHeight(deltaY / OFFSET_RADIO);
261 invokeOnScrolling();
262 } elseif (getLastVisiblePosition() == mTotalItemCount - 1
263 && (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {
264// last item, already pulled up or want to pull up.265 updateFooterHeight(-deltaY / OFFSET_RADIO);
266 }
267break;
268default:
269 mLastY = -1; // reset270if (getFirstVisiblePosition() == 0) {
271// invoke refresh272if (mEnablePullRefresh
273 && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
274 mPullRefreshing = true;
275 mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
276if (mListViewListener != null) {
277 mListViewListener.onRefresh();
278 }
279 }
280 resetHeaderHeight();
281 }
282if (getLastVisiblePosition() == mTotalItemCount - 1) {
283// invoke load more.284if (mEnablePullLoad
285 && mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA) {
286 startLoadMore();
287 }
288 resetFooterHeight();
289 }
290break;
291 }
292returnsuper.onTouchEvent(ev);
293 }
294295 @Override
296publicvoid computeScroll() {
297if (mScroller.computeScrollOffset()) {
298if (mScrollBack == SCROLLBACK_HEADER) {
299 mHeaderView.setVisiableHeight(mScroller.getCurrY());
300 } else {
301 mFooterView.setBottomMargin(mScroller.getCurrY());
302 }
303 postInvalidate();
304 invokeOnScrolling();
305 }
306super.computeScroll();
307 }
308309 @Override
310publicvoid setOnScrollListener(OnScrollListener l) {
311 mScrollListener = l;
312 }
313314 @Override
315publicvoid onScrollStateChanged(AbsListView view, int scrollState) {
316if (mScrollListener != null) {
317 mScrollListener.onScrollStateChanged(view, scrollState);
318 }
319 }
320321 @Override
322publicvoid onScroll(AbsListView view, int firstVisibleItem,
323int visibleItemCount, int totalItemCount) {
324// send to user‘s listener325 mTotalItemCount = totalItemCount;
326if (mScrollListener != null) {
327 mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount,
328 totalItemCount);
329 }
330 }
331332publicvoid setXListViewListener(IXListViewListener l) {
333 mListViewListener = l;
334 }
335336/**337 * you can listen ListView.OnScrollListener or this one. it will invoke
338 * onXScrolling when header/footer scroll back.
339*/340publicinterface OnXScrollListener extends OnScrollListener {
341publicvoid onXScrolling(View view);
342 }
343344/**345 * implements this interface to get refresh/load more event.
346*/347publicinterface IXListViewListener {
348publicvoid onRefresh();
349350publicvoid onLoadMore();
351 }
352 }
在xlistview中定义了一个事件接口，来监听加载和刷新。
4.mainactivity
1
protected
void
onCreate(Bundle savedInstanceState) {
2
super
.onCreate(savedInstanceState);
3
setContentView(R.layout.activity_main);
4 handler=new Handler();
5 sqlhelper=new SQLiteHelper(MainActivity.this, "test", null, 1);
6 list=new ArrayList<PersonInfo>();
7 getData();
8 listview=(XListView)findViewById(R.id.listView1);
9 registerForContextMenu(listview);
10 listview.setPullLoadEnable(true);
11// View moreview=getLayoutInflater().inflate(R.layout.moredata, null);
12//listview.addFooterView(moreview);13 adapter=new MyAdapter(this);
14 listview.setAdapter(adapter);
15 listview.setXListViewListener(this);
16 listview.setOnItemLongClickListener(new OnItemLongClickListener() {
17 @Override
18publicboolean onItemLongClick(AdapterView<?> arg0, View arg1,
19int arg2, long arg3) {
20// TODO Auto-generated method stub21 PersonInfo person=list.get(arg2);
22 delname=person.getName();
23returnfalse;
24 }
25 });
2627/* btnpro=(Button)moreview.findViewById(R.id.bt_load);
28 pg=(ProgressBar)moreview.findViewById(R.id.pg);
29 btnpro.setOnClickListener(new View.OnClickListener() {
3031 @Override
32 public void onClick(View v) {
33 // TODO Auto-generated method stub
34 pg.setVisibility(View.VISIBLE);// 将进度条可见
35 btnpro.setVisibility(View.GONE);// 按钮不可见
36 Handler hanldre=new Handler();
37 hanldre.postDelayed(new Runnable(){
3839 @Override
40 public void run() {
41 // TODO Auto-generated method stub
4243 adapter.count+=5;
4445 btnpro.setVisibility(View.VISIBLE);
46 pg.setVisibility(View.GONE);
47 if(adapter.count>list.size())
4849 {
50 adapter. count=list.size();
51 btnpro.setVisibility(View.INVISIBLE);
52 }
53 adapter.notifyDataSetChanged();
54 }}, 2000);
55 }
56 });*/5758 }
59privatevoid getData()
60 {
61 Cursor cur=sqlhelper.getReadableDatabase().query("person", null, null, null, null, null, null);
62if(cur.moveToFirst())
63 {
64while(cur.moveToNext())
65 {
66 PersonInfo person=new PersonInfo();
67 person.name=cur.getString(cur.getColumnIndex("name"));
68 person.age=cur.getInt(cur.getColumnIndex("age"));
69 list.add(person);
70 }
71 }
72 }
73privatevoid onLoad() {
74 listview.stopRefresh();
75 listview.stopLoadMore();
76 SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm:ss");
77 String strTime = timeFormat.format(new java.util.Date());
78 listview.setRefreshTime(strTime);
79 }
1
@Override
2
public
void
onRefresh() {
3
//
TODO Auto-generated method stub
4 handler.postDelayed(new Runnable(){
5 6 @Override
7publicvoid run() {
8// TODO Auto-generated method stub 9if(list!=null &&list.size()>0)
10 {
11 list.clear();
12 getData();
13 adapter.notifyDataSetChanged();
14 onLoad();
15 }
16 }}, 2000);
17 }
18 @Override
19publicvoid onLoadMore() {
20// TODO Auto-generated method stub2122 handler.postDelayed(new Runnable(){
2324 @Override
25publicvoid run() {
26// TODO Auto-generated method stub27 adapter.count+=5;
2829if(adapter.count>list.size())
3031 {
32 adapter. count=list.size();
33 }
34 adapter.notifyDataSetChanged();
35 onLoad();
36 }}, 2000);
37 }
刷新和加载都是新建了一个handler。在handler中执行。
5.demo
原文：http://www.cnblogs.com/ggz19/p/3897478.html
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