Android开发ListView中下拉刷新上拉加载及带列的横向滚动实现方法

package com.example.testlistview.widget;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;import com.example.testlistview.R;import android.content.Context;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.animation.LinearInterpolator;import android.view.animation.RotateAnimation;import android.widget.AbsListView;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.AbsListView.OnScrollListener;import android.widget.ListView;/*** @author * @create* @version 1.0* @desc 自定义Listview�?下拉刷新,上拉加载更多*/public class AutoListView extends ListView implements OnScrollListener {// 区分当前操作是刷新还是加�?public static final int REFRESH = 0;public static final int LOAD = 1;// 区分PULL和RELEASE的距离的大小private static final int SPACE = 20;// 定义header的四种状态和当前状�??private static final int NONE = 0;private static final int PULL = 1;private static final int RELEASE = 2;private static final int REFRESHING = 3;private int state;private LayoutInflater inflater;private View header;private View footer;private TextView tip;private TextView lastUpdate;private ImageView arrow;private ProgressBar refreshing;private TextView noData;private TextView loadFull;private TextView more;private ProgressBar loading;private RotateAnimation animation;private RotateAnimation reverseAnimation;private int startY;private int firstVisibleItem;private int scrollState;private int headerContentInitialHeight;private int headerContentHeight;// 只有在listview第一个item显示的时候（listview滑到了顶部）才进行下拉刷新， 否则此时的下拉只是滑动listviewprivate boolean isRecorded;private boolean isLoading;// 判断是否正在加载private boolean loadEnable = true;// �?启或者关闭加载更多功�?private boolean isLoadFull;private int pageSize = 10;private OnRefreshListener onRefreshListener;private OnLoadListener onLoadListener;public AutoListView(Context context) {super(context);initView(context);}public AutoListView(Context context, AttributeSet attrs) {super(context, attrs);initView(context);}public AutoListView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);initView(context);}// 下拉刷新监听public void setOnRefreshListener(OnRefreshListener onRefreshListener) {this.onRefreshListener = onRefreshListener;}// 加载更多监听public void setOnLoadListener(OnLoadListener onLoadListener) {this.loadEnable = true;this.onLoadListener = onLoadListener;}public boolean isLoadEnable() {return loadEnable;}// 这里的开启或者关闭加载更多，并不支持动�?�调�?public void setLoadEnable(boolean loadEnable) {this.loadEnable = loadEnable;this.removeFooterView(footer);}public int getPageSize() {return pageSize;}public void setPageSize(int pageSize) {this.pageSize = pageSize;}// 初始化组�?private void initView(Context context) {// 设置箭头特效animation = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);animation.setInterpolator(new LinearInterpolator());animation.setDuration(1000);animation.setFillAfter(true);reverseAnimation = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);reverseAnimation.setInterpolator(new LinearInterpolator());reverseAnimation.setDuration(1000);reverseAnimation.setFillAfter(true);inflater = LayoutInflater.from(context);footer = inflater.inflate(R.layout.listview_footer, null);loadFull = (TextView) footer.findViewById(R.id.loadFull);noData = (TextView) footer.findViewById(R.id.noData);more = (TextView) footer.findViewById(R.id.more);loading = (ProgressBar) footer.findViewById(R.id.loading);header = inflater.inflate(R.layout.pull_to_refresh_header, null);arrow = (ImageView) header.findViewById(R.id.arrow);tip = (TextView) header.findViewById(R.id.tip);lastUpdate = (TextView) header.findViewById(R.id.lastUpdate);refreshing = (ProgressBar) header.findViewById(R.id.refreshing);// 为listview添加头部和尾部，并进行初始化headerContentInitialHeight = header.getPaddingTop();measureView(header);headerContentHeight = header.getMeasuredHeight();topPadding(-headerContentHeight);this.addHeaderView(header);this.addFooterView(footer);this.setOnScrollListener(this);}public void onRefresh() {if (onRefreshListener != null) {onRefreshListener.onRefresh();}}public void onLoad() {if (onLoadListener != null) {onLoadListener.onLoad();}}public void onRefreshComplete(String updateTime) {lastUpdate.setText(this.getContext().getString(R.string.lastUpdateTime, getCurrentTime()));state = NONE;refreshHeaderViewByState();}// 用于下拉刷新结束后的回调public void onRefreshComplete() {String currentTime = getCurrentTime();onRefreshComplete(currentTime);}// 用于加载更多结束后的回调public void onLoadComplete() {isLoading = false;}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {this.firstVisibleItem = firstVisibleItem;}@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {this.scrollState = scrollState;ifNeedLoad(view, scrollState);}// 根据listview滑动的状态判断是否需要加载更�?private void ifNeedLoad(AbsListView view, int scrollState) {if (!loadEnable) {return;}try {if (scrollState == OnScrollListener.SCROLL_STATE_IDLE && !isLoading&& view.getLastVisiblePosition() == view.getPositionForView(footer) && !isLoadFull) {onLoad();isLoading = true;}} catch (Exception e) {}}/*** 监听触摸事件，解读手�?*/@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {// case MotionEvent.ACTION_DOWN:// if (firstVisibleItem == 0) {// isRecorded = true;// startY = (int) ev.getY();// }// break;case MotionEvent.ACTION_CANCEL:case MotionEvent.ACTION_UP:if (state == PULL) {state = NONE;refreshHeaderViewByState();} else if (state == RELEASE) {state = REFRESHING;refreshHeaderViewByState();onRefresh();}isRecorded = false;break;case MotionEvent.ACTION_MOVE:whenMove(ev);break;}return super.onTouchEvent(ev);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent ev) {if (ev.getAction() == MotionEvent.ACTION_DOWN) {if (firstVisibleItem == 0) {isRecorded = true;startY = (int) ev.getY();}}return super.onInterceptTouchEvent(ev);}// 解读手势，刷新header状�??private void whenMove(MotionEvent ev) {if (!isRecorded) {return;}int tmpY = (int) ev.getY();int space = tmpY - startY;int topPadding = space - headerContentHeight;switch (state) {case NONE:if (space > 0) {state = PULL;refreshHeaderViewByState();}break;case PULL:topPadding(topPadding);if (scrollState == SCROLL_STATE_TOUCH_SCROLL && space > headerContentHeight + SPACE) {state = RELEASE;refreshHeaderViewByState();}break;case RELEASE:topPadding(topPadding);if (space > 0 && space < headerContentHeight + SPACE) {state = PULL;refreshHeaderViewByState();} else if (space <= 0) {state = NONE;refreshHeaderViewByState();}break;}}// 调整header的大小�?�其实调整的只是距离顶部的高度�??private void topPadding(int topPadding) {header.setPadding(header.getPaddingLeft(), topPadding, header.getPaddingRight(), header.getPaddingBottom());header.invalidate();}/*** 这个方法是根据结果的大小来决定footer显示的�??* <p>* 这里假定每次请求的条数为10。如果请求到�?10条�?�则认为还有数据。如过结果不�?10条，则认为数据已经全部加载，* 这时footer显示已经全部加载* </p>* * @param resultSize*/public void setResultSize(int resultSize) {if (resultSize == 0) {isLoadFull = true;loadFull.setVisibility(View.GONE);loading.setVisibility(View.GONE);more.setVisibility(View.GONE);noData.setVisibility(View.VISIBLE);} else if (resultSize > 0 && resultSize < pageSize) {isLoadFull = true;loadFull.setVisibility(View.VISIBLE);loading.setVisibility(View.GONE);more.setVisibility(View.GONE);noData.setVisibility(View.GONE);} else if (resultSize == pageSize) {isLoadFull = false;loadFull.setVisibility(View.GONE);loading.setVisibility(View.VISIBLE);more.setVisibility(View.VISIBLE);noData.setVisibility(View.GONE);}}// 根据当前状�?�，调整headerprivate void refreshHeaderViewByState() {switch (state) {case NONE:topPadding(-headerContentHeight);tip.setText(R.string.pull_to_refresh);refreshing.setVisibility(View.GONE);arrow.clearAnimation();arrow.setImageResource(R.drawable.pull_to_refresh_arrow);break;case PULL:arrow.setVisibility(View.VISIBLE);tip.setVisibility(View.VISIBLE);lastUpdate.setVisibility(View.VISIBLE);refreshing.setVisibility(View.GONE);tip.setText(R.string.pull_to_refresh);arrow.clearAnimation();arrow.setAnimation(reverseAnimation);break;case RELEASE:arrow.setVisibility(View.VISIBLE);tip.setVisibility(View.VISIBLE);lastUpdate.setVisibility(View.VISIBLE);refreshing.setVisibility(View.GONE);tip.setText(R.string.pull_to_refresh);tip.setText(R.string.release_to_refresh);arrow.clearAnimation();arrow.setAnimation(animation);break;case REFRESHING:topPadding(headerContentInitialHeight);refreshing.setVisibility(View.VISIBLE);arrow.clearAnimation();arrow.setVisibility(View.GONE);tip.setVisibility(View.GONE);lastUpdate.setVisibility(View.GONE);break;}}// 用来计算header大小的�?�比较隐晦�?�因为header的初始高度就�?0,貌似可以不用�?private void measureView(View child) {ViewGroup.LayoutParams p = child.getLayoutParams();if (p == null) {p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_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);}/** 定义下拉刷新接口*/public interface OnRefreshListener {public void onRefresh();}/** 定义加载更多接口*/public interface OnLoadListener {public void onLoad();}public String getCurrentTime(String format) {Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.getDefault());String currentTime = sdf.format(date);return currentTime;}public String getCurrentTime() {return getCurrentTime("yyyy-MM-dd HH:mm:ss");}}

package com.example.testlistview.widget;import java.util.ArrayList;import java.util.List;import com.example.testlistview.widget.CHScrollView.CHScrollViewHelper;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.widget.HorizontalScrollView;import android.widget.Toast;public class CHScrollView extends HorizontalScrollView {private Context context;float startx = 0;float offset;public CHScrollView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);this.context = context;}public CHScrollView(Context context, AttributeSet attrs) {super(context, attrs);this.context = context;}public CHScrollView(Context context) {super(context);this.context = context;}@Overridepublic boolean onTouchEvent(MotionEvent ev) {// 进行触摸赋值CHScrollViewHelper.mTouchView = this;return super.onTouchEvent(ev);}@Overrideprotected void onScrollChanged(int l, int t, int oldl, int oldt) {// 当当前的CHSCrollView被触摸时，滑动其它if (CHScrollViewHelper.mTouchView == this) {onScrollChanged(l, t, oldl, oldt, 0);} else {super.onScrollChanged(l, t, oldl, oldt);}}public void onScrollChanged(int l, int t, int oldl, int oldt, int none) {for (CHScrollView scrollView : CHScrollViewHelper.mHScrollViews) {// 防止重复滑动if (CHScrollViewHelper.mTouchView != scrollView)scrollView.smoothScrollTo(l, t);}}public static class CHScrollViewHelper {public static HorizontalScrollView mTouchView;public static List<CHScrollView> mHScrollViews = new ArrayList<CHScrollView>();public static void addHViews(final CHScrollView hScrollView, AutoListView autoListView) {if (!CHScrollViewHelper.mHScrollViews.isEmpty()) {int size = CHScrollViewHelper.mHScrollViews.size();CHScrollView scrollView = CHScrollViewHelper.mHScrollViews.get(size - 1);final int scrollX = scrollView.getScrollX();// 第一次满屏后，向下滑动，有一条数据在开始时未加入if (scrollX != 0) {autoListView.post(new Runnable() {@Overridepublic void run() {// 当listView刷新完成之后，把该条移动到最终位置hScrollView.scrollTo(scrollX, 0);}});}}CHScrollViewHelper.mHScrollViews.add(hScrollView);}}}

package com.example.testlistview.adapter;import java.util.List;import java.util.Map;import com.example.testlistview.R;import com.example.testlistview.widget.AutoListView;import com.example.testlistview.widget.CHScrollView;import com.example.testlistview.widget.CHScrollView.CHScrollViewHelper;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.SimpleAdapter;import android.widget.TextView;public class ListViewScrollAdapter extends SimpleAdapter {private List<? extends Map<String, ?>> datas;private int res;private String[] from;private int[] to;private Context context;private int resScroll;private AutoListView lstv;public ListViewScrollAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from,int[] to, int resourceItem,AutoListView autoListView) {super(context, data, resource, from, to);this.context = context;this.datas = data;this.res = resource;this.from = from;this.to = to;this.resScroll = resourceItem;this.lstv = autoListView;}@Overridepublic int getCount() {return this.datas.size();}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {View v = convertView;if (v == null) {v = LayoutInflater.from(context).inflate(res, null);// 第一次初始化的时候装进来CHScrollViewHelper.addHViews((CHScrollView) v.findViewById(resScroll), lstv);View[] views = new View[to.length];for (int i = 0; i < to.length; i++) {View tv = v.findViewById(to[i]);views[i] = tv;}v.setTag(views);}v.setBackgroundResource(R.drawable.selector_bg_white_gray);View[] holders = (View[]) v.getTag();int len = holders.length;for (int i = 0; i < len; i++) {((TextView) holders[i]).setText(this.datas.get(position).get(from[i]).toString());}return v;}public Context getContext() {return context;}}

package com.example.testlistview;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.example.testlistview.widget.AutoListView.OnLoadListener;import com.example.testlistview.widget.AutoListView.OnRefreshListener;import com.example.testlistview.R;import com.example.testlistview.adapter.ListViewScrollAdapter;import com.example.testlistview.widget.AutoListView;import com.example.testlistview.widget.CHScrollView;import com.example.testlistview.widget.CHScrollView.CHScrollViewHelper;import android.annotation.SuppressLint;import android.app.Activity;public class MainActivity extends Activity implements OnRefreshListener, OnLoadListener, OnItemClickListener {private AutoListView lstv;private CHScrollView headerScroll;List<Map<String, String>> list = new ArrayList<Map<String, String>>();private ListViewScrollAdapter adapter;@SuppressLint("HandlerLeak")private Handler handler = new Handler() {@SuppressWarnings("unchecked")public void handleMessage(Message msg) {List<Map<String, String>> result = (List<Map<String, String>>) msg.obj;switch (msg.what) {case AutoListView.REFRESH:lstv.onRefreshComplete();list.clear();list.addAll(result);break;case AutoListView.LOAD:lstv.onLoadComplete();list.addAll(result);break;}lstv.setResultSize(result.size());adapter.notifyDataSetChanged();};};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();initData();}private void initView() {headerScroll = (CHScrollView) findViewById(R.id.item_scroll_title);CHScrollViewHelper.mHScrollViews.clear();// 添加头滑动事件CHScrollViewHelper.mHScrollViews.add(headerScroll);lstv = (AutoListView) findViewById(R.id.scroll_list);adapter = new ListViewScrollAdapter(this, list, R.layout.auto_listview_item,new String[] { "title", "data_1", "data_2", "data_3", "data_4", "data_5", "data_6", },new int[] { R.id.item_title, R.id.item_data1, R.id.item_data2, R.id.item_data3, R.id.item_data4,R.id.item_data5, R.id.item_data6 },R.id.item_scroll, lstv);lstv.setAdapter(adapter);lstv.setOnRefreshListener(this);lstv.setOnLoadListener(this);lstv.setOnItemClickListener(this);}private void initData() {loadData(AutoListView.REFRESH);}private void loadData(final int what) {// 这里模拟从服务器获取数据new Thread(new Runnable() {@Overridepublic void run() {try {Thread.sleep(700);} catch (InterruptedException e) {e.printStackTrace();}Message msg = handler.obtainMessage();msg.what = what;msg.obj = getData();handler.sendMessage(msg);}}).start();}@Overridepublic void onRefresh() {loadData(AutoListView.REFRESH);}@Overridepublic void onLoad() {loadData(AutoListView.LOAD);}@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {try {TextView textView = (TextView) arg1.findViewById(R.id.item_data2);Toast.makeText(this, "你点击了：" + textView.getText(), Toast.LENGTH_SHORT).show();} catch (Exception ex) {}}// 测试数据public List<Map<String, String>> getData() {List<Map<String, String>> result = new ArrayList<Map<String, String>>();Map<String, String> data = null;for (int i = 0; i < 10; i++) {data = new HashMap<String, String>();data.put("title", "Title_" + i);data.put("data_" + 1, "Date_" + 1 + "_" + i);data.put("data_" + 2, "Date_" + 2 + "_" + i);data.put("data_" + 3, "Date_" + 3 + "_" + i);data.put("data_" + 4, "Date_" + 4 + "_" + i);data.put("data_" + 5, "Date_" + 5 + "_" + i);data.put("data_" + 6, "Date_" + 6 + "_" + i);result.add(data);}return result;}}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:background="#ccc"android:minHeight="40dip"android:orientation="horizontal" ><TextViewandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="2"android:gravity="center"android:text="表头测试"android:textColor="#850" /><com.example.testlistview.widget.CHScrollViewandroid:id="@+id/item_scroll_title"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:scrollbars="none" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="horizontal" ><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date1"android:textColor="#850" /><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date2"android:textColor="#850" /><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date3"android:textColor="#850" /><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date4"android:textColor="#850" /><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date5"android:textColor="#850" /><TextViewandroid:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:text="Date6"android:textColor="#850" /></LinearLayout></com.example.testlistview.widget.CHScrollView></LinearLayout><com.example.testlistview.widget.AutoListViewandroid:id="@+id/scroll_list"android:layout_width="match_parent"android:layout_height="fill_parent"android:cacheColorHint="@android:color/transparent" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:descendantFocusability="blocksDescendants"android:minHeight="50dip"android:orientation="horizontal" ><TextViewandroid:id="@+id/item_title"android:layout_width="fill_parent"android:layout_height="match_parent"android:layout_weight="2"android:gravity="center"android:text="表头测试" /><com.example.testlistview.widget.CHScrollViewandroid:id="@+id/item_scroll"android:layout_width="fill_parent"android:layout_height="match_parent"android:layout_weight="1"android:focusable="false"android:scrollbars="none" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="horizontal" ><TextViewandroid:id="@+id/item_data1"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#011" /><TextViewandroid:id="@+id/item_data2"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#191" /><TextViewandroid:id="@+id/item_data3"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#101" /><TextViewandroid:id="@+id/item_data4"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#111" /><TextViewandroid:id="@+id/item_data5"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#071" /><TextViewandroid:id="@+id/item_data6"android:layout_width="100dip"android:layout_height="fill_parent"android:gravity="center"android:textColor="#910" /></LinearLayout></com.example.testlistview.widget.CHScrollView></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center"android:orientation="horizontal" ><TextViewandroid:id="@+id/loadFull"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:padding="5dp"android:text="@string/load_full"android:visibility="gone" /><TextViewandroid:id="@+id/noData"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:padding="5dp"android:text="@string/no_data"android:visibility="gone" /><TextViewandroid:id="@+id/more"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:padding="5dp"android:text="@string/more" /><ProgressBarandroid:id="@+id/loading"style="@style/customProgressBar" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center"android:orientation="vertical" ><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:paddingBottom="5dp" ><LinearLayoutandroid:id="@+id/layout"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerHorizontal="true"android:layout_centerVertical="true"android:orientation="vertical" ><ProgressBarandroid:id="@+id/refreshing"style="@style/customProgressBar" /><TextViewandroid:id="@+id/tip"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center" /><TextViewandroid:id="@+id/lastUpdate"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:textSize="12sp" /></LinearLayout><ImageViewandroid:id="@+id/arrow"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_marginRight="20dp"android:layout_toLeftOf="@id/layout"android:contentDescription="@string/d"android:src="@drawable/pull_to_refresh_arrow" /></RelativeLayout><ImageViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:background="@drawable/h_line"android:contentDescription="@string/d" /></LinearLayout><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="15" />