将上拉加载更多下拉刷新PullToRefreshView用到项目中去

1、PullToRefreshView要用的几个方法如下：

     a、PullToRefreshView.setOnFooterRefreshListener //监听上拉加载更多

     b、PullToRefreshView.setOnHeaderRefreshListener//监听下拉刷新

     c、PullToRefreshView.setLastUpdated//上次更新时间

     d、PullToRefreshView.onFooterRefreshComplete //加载更多完成

     e、PullToRefreshView.onHeaderRefreshComplete//下拉刷新完成

2、PullToRefreshView是重写LinearLayout的 要加载list数据  所以再PullToRefreshView里放入listview或gridview

如下

<********.util.PullToRefreshView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/pullToRefreshView"    >    <ListView        android:id="@+id/listView"        android:layout_width="match_parent"        android:layout_height="match_parent"></ListView></********.util.PullToRefreshView>

3、应用到项目中去

  

/** * Created by CarrayDraw on 2015/8/24. */public class MyMesageActivity extends Activity  {    private Context context;    private Button btn_left,btn_right;    private ArrayList<MyMessage> list=new ArrayList<MyMessage>();;    private PullToRefreshView pullToRefreshView;    private ListView listView;    private int page=1;    private int pageall=1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.message);        findView();        cleanData();        loadData();    }    private void cleanData() {        list.clear();        page=1;    }    private void loadData() {        ReqeustParams params=new ReqeustParams();        params.put("user", DemoApplication.preferences.getString("user",""));        params.put("page", String.valueOf(page));        GetPost getPost=new GetPost();        getPost.onPost(Globals.URL_PATH + Globals.MYMESSAGE, params, new GetPost.CallBack() {            @Override            public void onSuccess(String string) {                try {                    onCompelete();                    JSONObject object=new JSONObject(string);                    if("1".equals(object.getString("flag"))){                        JSONArray array=object.getJSONArray("guanzhulist");                        pageall=Integer.valueOf(object.getString("page").trim());                        for(int i=0;i<array.length();i++){                            MyMessage message=new MyMessage();                            message.setTitle(array.getJSONObject(i).getString("title"));                            message.setContent(array.getJSONObject(i).getString("content"));                            message.setTime(array.getJSONObject(i).getString("time"));                            list.add(message);                            MyMessageAdapter adapter=new MyMessageAdapter(list,context);                            listView.setAdapter(adapter);                        }                    }                } catch (JSONException e) {                    e.printStackTrace();                }            }            @Override            public void onFail(String string) {            }        });    }    private void findView() {        context=this;        btn_left= (Button) findViewById(R.id.btn_left);        btn_right= (Button) findViewById(R.id.btn_right);        pullToRefreshView= (PullToRefreshView) findViewById(R.id.pullToRefreshView);        listView= (ListView) findViewById(R.id.listView);        btn_left.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                btn_left.setBackgroundResource(R.drawable.left_press);                btn_left.setTextColor(0xffffffff);                btn_right.setBackgroundResource(R.drawable.right_normal);                btn_right.setTextColor(0xff449944);            }        });        btn_right.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                btn_left.setBackgroundResource(R.drawable.left_normal);                btn_right.setBackgroundResource(R.drawable.right_press);                btn_left.setTextColor(0xff449944);                btn_right.setTextColor(0xffffffff);            }        });        pullToRefreshView.setOnFooterRefreshListener(new PullToRefreshView.OnFooterRefreshListener() {            @Override            public void onFooterRefresh(PullToRefreshView view) {                if (page <= pageall) {                    page = page + 1;                    loadData();                }else{                    onCompelete();                    Toast.makeText(context,"已经没有最新的数据了",Toast.LENGTH_SHORT).show();                }            }        });        pullToRefreshView.setOnHeaderRefreshListener(new PullToRefreshView.OnHeaderRefreshListener() {            @Override            public void onHeaderRefresh(PullToRefreshView view) {                Date date=new Date();                SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");                String time=format.format(System.currentTimeMillis());                pullToRefreshView.setLastUpdated("上次更新时间  "+time);                cleanData();                loadData();            }        });    }    public void onCompelete(){        pullToRefreshView.onFooterRefreshComplete();        pullToRefreshView.onHeaderRefreshComplete();    }}

5、PullToRefreshView

public class PullToRefreshView extends LinearLayout {//private static final String TAG = "PullToRefreshView";// refresh statesprivate static final int PULL_TO_REFRESH = 2;private static final int RELEASE_TO_REFRESH = 3;private static final int REFRESHING = 4;// pull stateprivate static final int PULL_UP_STATE = 0;private static final int PULL_DOWN_STATE = 1;/** * last y */private int mLastMotionY;/** * lock *///private boolean mLock;/** * header view */private View mHeaderView;/** * footer view */private View mFooterView;/** * list or grid */private AdapterView<?> mAdapterView;/** * scrollview */private ScrollView mScrollView;/** * header view height */private int mHeaderViewHeight;/** * footer view height */private int mFooterViewHeight;/** * header view image */private ImageView mHeaderImageView;/** * footer view image */private ImageView mFooterImageView;/** * header tip text */private TextView mHeaderTextView;/** * footer tip text */private TextView mFooterTextView;/** * header refresh time */private TextView mHeaderUpdateTextView;/** * footer refresh time */// private TextView mFooterUpdateTextView;/** * header progress bar */private ProgressBar mHeaderProgressBar;/** * footer progress bar */private ProgressBar mFooterProgressBar;/** * layout inflater */private LayoutInflater mInflater;/** * header view current state */private int mHeaderState;/** * footer view current state */private int mFooterState;/** * pull state,pull up or pull down;PULL_UP_STATE or PULL_DOWN_STATE */private int mPullState;/** * 变为向下的箭头,改变箭头方向 */private RotateAnimation mFlipAnimation;/** * 变为逆向的箭头,旋转 */private RotateAnimation mReverseFlipAnimation;/** * footer refresh listener */private OnFooterRefreshListener mOnFooterRefreshListener;/** * footer refresh listener */private OnHeaderRefreshListener mOnHeaderRefreshListener;/** * last update time *///private String mLastUpdateTime;public PullToRefreshView(Context context, AttributeSet attrs) {super(context, attrs);init();}public PullToRefreshView(Context context) {super(context);init();}/** * init *  * @param */private void init() {//需要设置成verticalsetOrientation(LinearLayout.VERTICAL);// Load all of the animations we need in code rather than through XMLmFlipAnimation = new RotateAnimation(0, -180,RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);mFlipAnimation.setInterpolator(new LinearInterpolator());mFlipAnimation.setDuration(250);mFlipAnimation.setFillAfter(true);mReverseFlipAnimation = new RotateAnimation(-180, 0,RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);mReverseFlipAnimation.setInterpolator(new LinearInterpolator());mReverseFlipAnimation.setDuration(250);mReverseFlipAnimation.setFillAfter(true);mInflater = LayoutInflater.from(getContext());// header view 在此添加,保证是第一个添加到linearlayout的最上端addHeaderView();}private void addHeaderView() {// header viewmHeaderView = mInflater.inflate(R.layout.refresh_header, this, false);mHeaderImageView = (ImageView) mHeaderView.findViewById(R.id.pull_to_refresh_image);mHeaderTextView = (TextView) mHeaderView.findViewById(R.id.pull_to_refresh_text);mHeaderUpdateTextView = (TextView) mHeaderView.findViewById(R.id.pull_to_refresh_updated_at);mHeaderProgressBar = (ProgressBar) mHeaderView.findViewById(R.id.pull_to_refresh_progress);// header layoutmeasureView(mHeaderView);mHeaderViewHeight = mHeaderView.getMeasuredHeight();LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,mHeaderViewHeight);// 设置topMargin的值为负的header View高度,即将其隐藏在最上方params.topMargin = -(mHeaderViewHeight);// mHeaderView.setLayoutParams(params1);addView(mHeaderView, params);}private void addFooterView() {// footer viewmFooterView = mInflater.inflate(R.layout.refresh_footer, this, false);mFooterImageView = (ImageView) mFooterView.findViewById(R.id.pull_to_load_image);mFooterTextView = (TextView) mFooterView.findViewById(R.id.pull_to_load_text);mFooterProgressBar = (ProgressBar) mFooterView.findViewById(R.id.pull_to_load_progress);// footer layoutmeasureView(mFooterView);mFooterViewHeight = mFooterView.getMeasuredHeight();LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,mFooterViewHeight);// int top = getHeight();// params.topMargin// =getHeight();//在这里getHeight()==0,但在onInterceptTouchEvent()方法里getHeight()已经有值了,不再是0;// getHeight()什么时候会赋值,稍候再研究一下// 由于是线性布局可以直接添加,只要AdapterView的高度是MATCH_PARENT,那么footer view就会被添加到最后,并隐藏addView(mFooterView, params);}@Overrideprotected void onFinishInflate() {super.onFinishInflate();// footer view 在此添加保证添加到linearlayout中的最后addFooterView();initContentAdapterView();}/** * init AdapterView like ListView,GridView and so on;or init ScrollView *  */private void initContentAdapterView() {int count = getChildCount();if (count < 3) {throw new IllegalArgumentException("This layout must contain 3 child views,and AdapterView or ScrollView must in the second position!");}View view = null;for (int i = 0; i < count - 1; ++i) {view = getChildAt(i);if (view instanceof AdapterView<?>) {mAdapterView = (AdapterView<?>) view;}if (view instanceof ScrollView) {// finish latermScrollView = (ScrollView) view;}}if (mAdapterView == null && mScrollView == null) {throw new IllegalArgumentException("must contain a AdapterView or ScrollView in this layout!");}}private void measureView(View child) {ViewGroup.LayoutParams p = child.getLayoutParams();if (p == null) {p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);}int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);int lpHeight = p.height;int childHeightSpec;if (lpHeight > 0) {childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,MeasureSpec.EXACTLY);} else {childHeightSpec = MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED);}child.measure(childWidthSpec, childHeightSpec);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent e) {int y = (int) e.getRawY();switch (e.getAction()) {case MotionEvent.ACTION_DOWN:// 首先拦截down事件,记录y坐标mLastMotionY = y;break;case MotionEvent.ACTION_MOVE:// deltaY > 0 是向下运动,< 0是向上运动int deltaY = y - mLastMotionY;if (isRefreshViewScroll(deltaY)) {return true;}break;case MotionEvent.ACTION_UP:case MotionEvent.ACTION_CANCEL:break;}return false;}/* * 如果在onInterceptTouchEvent()方法中没有拦截(即onInterceptTouchEvent()方法中 return * false)则由PullToRefreshView 的子View来处理;否则由下面的方法来处理(即由PullToRefreshView自己来处理) */@Overridepublic boolean onTouchEvent(MotionEvent event) {//if (mLock) {//return true;//}int y = (int) event.getRawY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:// onInterceptTouchEvent已经记录// mLastMotionY = y;break;case MotionEvent.ACTION_MOVE:int deltaY = y - mLastMotionY;if (mPullState == PULL_DOWN_STATE) {//执行下拉headerPrepareToRefresh(deltaY);// setHeaderPadding(-mHeaderViewHeight);} else if (mPullState == PULL_UP_STATE) {//执行上拉footerPrepareToRefresh(deltaY);}mLastMotionY = y;break;case MotionEvent.ACTION_UP:case MotionEvent.ACTION_CANCEL:int topMargin = getHeaderTopMargin();if (mPullState == PULL_DOWN_STATE) {if (topMargin >= 0) {// 开始刷新headerRefreshing();} else {// 还没有执行刷新，重新隐藏setHeaderTopMargin(-mHeaderViewHeight);}} else if (mPullState == PULL_UP_STATE) {if (Math.abs(topMargin) >= mHeaderViewHeight+ mFooterViewHeight) {// 开始执行footer 刷新footerRefreshing();} else {// 还没有执行刷新，重新隐藏setHeaderTopMargin(-mHeaderViewHeight);}}break;}return super.onTouchEvent(event);}/** * 是否应该到了父View,即PullToRefreshView滑动 *  * @param deltaY *            , deltaY > 0 是向下运动,< 0是向上运动 * @return */private boolean isRefreshViewScroll(int deltaY) {if (mHeaderState == REFRESHING || mFooterState == REFRESHING) {return false;}//对于ListView和GridViewif (mAdapterView != null) {// 子view(ListView or GridView)滑动到最顶端if (deltaY > 0) {View child = mAdapterView.getChildAt(0);if (child == null) {// 如果mAdapterView中没有数据,不拦截return false;}if (mAdapterView.getFirstVisiblePosition() == 0&& child.getTop() == 0) {mPullState = PULL_DOWN_STATE;return true;}int top = child.getTop();int padding = mAdapterView.getPaddingTop();if (mAdapterView.getFirstVisiblePosition() == 0&& Math.abs(top - padding) <= 8) {//这里之前用3可以判断,但现在不行,还没找到原因mPullState = PULL_DOWN_STATE;return true;}} else if (deltaY < 0) {View lastChild = mAdapterView.getChildAt(mAdapterView.getChildCount() - 1);if (lastChild == null) {// 如果mAdapterView中没有数据,不拦截return false;}// 最后一个子view的Bottom小于父View的高度说明mAdapterView的数据没有填满父view,// 等于父View的高度说明mAdapterView已经滑动到最后if (lastChild.getBottom() <= getHeight()&& mAdapterView.getLastVisiblePosition() == mAdapterView.getCount() - 1) {mPullState = PULL_UP_STATE;return true;}}}// 对于ScrollViewif (mScrollView != null) {// 子scroll view滑动到最顶端View child = mScrollView.getChildAt(0);if (deltaY > 0 && mScrollView.getScrollY() == 0) {mPullState = PULL_DOWN_STATE;return true;} else if (deltaY < 0&& child.getMeasuredHeight() <= getHeight()+ mScrollView.getScrollY()) {mPullState = PULL_UP_STATE;return true;}}return false;}/** * header 准备刷新,手指移动过程,还没有释放 *  * @param deltaY *            ,手指滑动的距离 */private void headerPrepareToRefresh(int deltaY) {int newTopMargin = changingHeaderViewTopMargin(deltaY);// 当header view的topMargin>=0时，说明已经完全显示出来了,修改header view 的提示状态if (newTopMargin >= 0 && mHeaderState != RELEASE_TO_REFRESH) {mHeaderTextView.setText(R.string.pull_to_refresh_release_label);mHeaderUpdateTextView.setVisibility(View.VISIBLE);mHeaderImageView.clearAnimation();mHeaderImageView.startAnimation(mFlipAnimation);mHeaderState = RELEASE_TO_REFRESH;} else if (newTopMargin < 0 && newTopMargin > -mHeaderViewHeight) {// 拖动时没有释放mHeaderImageView.clearAnimation();mHeaderImageView.startAnimation(mFlipAnimation);// mHeaderImageView.mHeaderTextView.setText(R.string.pull_to_refresh_pull_label);mHeaderState = PULL_TO_REFRESH;}}/** * footer 准备刷新,手指移动过程,还没有释放 移动footer view高度同样和移动header view * 高度是一样，都是通过修改header view的topmargin的值来达到 *  * @param deltaY *            ,手指滑动的距离 */private void footerPrepareToRefresh(int deltaY) {int newTopMargin = changingHeaderViewTopMargin(deltaY);// 如果header view topMargin 的绝对值大于或等于header + footer 的高度// 说明footer view 完全显示出来了，修改footer view 的提示状态if (Math.abs(newTopMargin) >= (mHeaderViewHeight + mFooterViewHeight)&& mFooterState != RELEASE_TO_REFRESH) {mFooterTextView.setText(R.string.pull_to_refresh_footer_release_label);mFooterImageView.clearAnimation();mFooterImageView.startAnimation(mFlipAnimation);mFooterState = RELEASE_TO_REFRESH;} else if (Math.abs(newTopMargin) < (mHeaderViewHeight + mFooterViewHeight)) {mFooterImageView.clearAnimation();mFooterImageView.startAnimation(mFlipAnimation);mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);mFooterState = PULL_TO_REFRESH;}}/** * 修改Header view top margin的值 *  * @param deltaY */private int changingHeaderViewTopMargin(int deltaY) {LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();float newTopMargin = params.topMargin + deltaY * 0.3f;//这里对上拉做一下限制,因为当前上拉后然后不释放手指直接下拉,会把下拉刷新给触发了,感谢网友yufengzungzhe的指出//表示如果是在上拉后一段距离,然后直接下拉if(deltaY>0&&mPullState == PULL_UP_STATE&&Math.abs(params.topMargin) <= mHeaderViewHeight){return params.topMargin;}//同样地,对下拉做一下限制,避免出现跟上拉操作时一样的bugif(deltaY<0&&mPullState == PULL_DOWN_STATE&&Math.abs(params.topMargin)>=mHeaderViewHeight){return params.topMargin;}params.topMargin = (int) newTopMargin;mHeaderView.setLayoutParams(params);invalidate();return params.topMargin;}/** * header refreshing *  */private void headerRefreshing() {mHeaderState = REFRESHING;setHeaderTopMargin(0);mHeaderImageView.setVisibility(View.GONE);mHeaderImageView.clearAnimation();mHeaderImageView.setImageDrawable(null);mHeaderProgressBar.setVisibility(View.VISIBLE);mHeaderTextView.setText(R.string.pull_to_refresh_refreshing_label);if (mOnHeaderRefreshListener != null) {mOnHeaderRefreshListener.onHeaderRefresh(this);}}/** * footer refreshing *  */private void footerRefreshing() {mFooterState = REFRESHING;int top = mHeaderViewHeight + mFooterViewHeight;setHeaderTopMargin(-top);mFooterImageView.setVisibility(View.GONE);mFooterImageView.clearAnimation();mFooterImageView.setImageDrawable(null);mFooterProgressBar.setVisibility(View.VISIBLE);mFooterTextView.setText(R.string.pull_to_refresh_footer_refreshing_label);if (mOnFooterRefreshListener != null) {mOnFooterRefreshListener.onFooterRefresh(this);}}/** * 设置header view 的topMargin的值 *  * @param topMargin *            ，为0时，说明header view 刚好完全显示出来； 为-mHeaderViewHeight时，说明完全隐藏了 */private void setHeaderTopMargin(int topMargin) {LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();params.topMargin = topMargin;mHeaderView.setLayoutParams(params);invalidate();}/** * header view 完成更新后恢复初始状态 *  */public void onHeaderRefreshComplete() {setHeaderTopMargin(-mHeaderViewHeight);mHeaderImageView.setVisibility(View.VISIBLE);mHeaderImageView.setImageResource(R.drawable.ic_pulltorefresh_arrow);mHeaderTextView.setText(R.string.pull_to_refresh_pull_label);mHeaderProgressBar.setVisibility(View.GONE);// mHeaderUpdateTextView.setText("");mHeaderState = PULL_TO_REFRESH;}/** * Resets the list to a normal state after a refresh. *  * @param lastUpdated *            Last updated at. */public void onHeaderRefreshComplete(CharSequence lastUpdated) {setLastUpdated(lastUpdated);onHeaderRefreshComplete();}/** * footer view 完成更新后恢复初始状态 */public void onFooterRefreshComplete() {setHeaderTopMargin(-mHeaderViewHeight);mFooterImageView.setVisibility(View.VISIBLE);mFooterImageView.setImageResource(R.drawable.ic_pulltorefresh_arrow_up);mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);mFooterProgressBar.setVisibility(View.GONE);// mHeaderUpdateTextView.setText("");mFooterState = PULL_TO_REFRESH;}/** * Set a text to represent when the list was last updated. *  * @param lastUpdated *            Last updated at. */public void setLastUpdated(CharSequence lastUpdated) {if (lastUpdated != null) {mHeaderUpdateTextView.setVisibility(View.VISIBLE);mHeaderUpdateTextView.setText(lastUpdated);} else {mHeaderUpdateTextView.setVisibility(View.GONE);}}/** * 获取当前header view 的topMargin *  */private int getHeaderTopMargin() {LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();return params.topMargin;}///**// * lock// * // *///private void lock() {//mLock = true;//}/////**// * unlock// * // *///private void unlock() {//mLock = false;//}/** * set headerRefreshListener *  * @param headerRefreshListener */public void setOnHeaderRefreshListener(OnHeaderRefreshListener headerRefreshListener) {mOnHeaderRefreshListener = headerRefreshListener;}public void setOnFooterRefreshListener(OnFooterRefreshListener footerRefreshListener) {mOnFooterRefreshListener = footerRefreshListener;}/** * Interface definition for a callback to be invoked when list/grid footer * view should be refreshed. */public interface OnFooterRefreshListener {public void onFooterRefresh(PullToRefreshView view);}/** * Interface definition for a callback to be invoked when list/grid header * view should be refreshed. */public interface OnHeaderRefreshListener {public void onHeaderRefresh(PullToRefreshView view);}}

6.PullToRefreshView的头布局与尾布局

   尾部局   refresh_footer.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/pull_to_refresh_header"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:background="@android:color/white"    android:gravity="center"    android:paddingBottom="10dip"    android:paddingTop="10dip" >    <ProgressBar        android:id="@+id/pull_to_load_progress"        style="?android:attr/progressBarStyleSmall"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="30dip"        android:layout_marginRight="20dip"        android:layout_marginTop="10dip"        android:indeterminate="true"        android:visibility="gone" />    <ImageView        android:id="@+id/pull_to_load_image"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:layout_marginLeft="30dip"        android:layout_marginRight="20dip"        android:gravity="center"        android:src="@drawable/ic_pulltorefresh_arrow_up"        android:visibility="visible" />    <TextView        android:id="@+id/pull_to_load_text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:gravity="center"        android:textColor="#000000"        android:text="@string/pull_to_refresh_footer_pull_label"        android:textAppearance="?android:attr/textAppearanceMedium"        android:textStyle="bold" /></RelativeLayout>

    头布局   refresh_header.xml

<?xml version="1.0" encoding="utf-8"?><!--     Copyright (C) 2011 Johan Nilsson <http://markupartist.com>     Licensed under the Apache License, Version 2.0 (the "License");     you may not use this file except in compliance with the License.     You may obtain a copy of the License at          http://www.apache.org/licenses/LICENSE-2.0     Unless required by applicable law or agreed to in writing, software     distributed under the License is distributed on an "AS IS" BASIS,     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.     See the License for the specific language governing permissions and     limitations under the License.--><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/pull_to_refresh_header"    android:background="@android:color/white"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center"    android:paddingBottom="15dip"    android:paddingTop="10dip" >    <ProgressBar        android:id="@+id/pull_to_refresh_progress"        style="?android:attr/progressBarStyleSmall"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="30dip"        android:layout_marginRight="20dip"        android:layout_marginTop="10dip"        android:indeterminate="true"        android:visibility="gone" />    <ImageView        android:id="@+id/pull_to_refresh_image"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:layout_marginLeft="30dip"        android:layout_marginRight="20dip"        android:gravity="center"        android:src="@drawable/ic_pulltorefresh_arrow"        android:visibility="visible" />    <TextView        android:id="@+id/pull_to_refresh_text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:gravity="center"        android:textColor="#000000"        android:text="@string/pull_to_refresh_pull_label"        android:textAppearance="?android:attr/textAppearanceMedium"        android:textStyle="bold" />    <TextView        android:id="@+id/pull_to_refresh_updated_at"        android:layout_width="fill_parent"        android:layout_height="30dip"        android:layout_below="@+id/pull_to_refresh_text"        android:text=""        android:layout_gravity="center"        android:gravity="center"        android:textAppearance="?android:attr/textAppearanceSmall"        android:visibility="gone" /></RelativeLayout>