android_108_PullToRefresh

效果:

布局:

旋转动画

<?xml version="1.0" encoding="utf-8"?><rotate xmlns:android="http://schemas.android.com/apk/res/android"     android:fromDegrees="0"    android:pivotX="50%"    android:pivotY="50%"    android:drawable="@drawable/indicate_rotate"    android:toDegrees="360"></rotate>

主界面:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.sg31.sgpullrefresh.MainActivity" >    <com.sg31.sgpullrefresh.SGRefreshListView        android:id="@+id/refreshListView"        android:layout_width="match_parent"        android:layout_height="match_parent" >    </com.sg31.sgpullrefresh.SGRefreshListView></RelativeLayout>

headerView

<?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_horizontal"    android:orientation="horizontal" >        <RelativeLayout android:layout_width="wrap_content"        android:layout_marginTop="10dp"        android:layout_marginBottom="10dp"        android:layout_height="wrap_content">                <ImageView android:layout_width="wrap_content"            android:layout_centerInParent="true"            android:id="@+id/iv_arrow"            android:background="@drawable/indicator_arrow"            android:layout_height="wrap_content"/>                <ProgressBar android:layout_width="30dp"            android:layout_centerInParent="true"            android:layout_height="30dp"            android:visibility="invisible"            android:id="@+id/pb_rotate"            android:indeterminateDuration="1000"           android:indeterminateDrawable="@drawable/indeterminate_drawable"            />            </RelativeLayout>        <LinearLayout android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="10dp"        android:layout_marginBottom="10dp"        android:gravity="center"        android:layout_marginLeft="15dp"        android:orientation="vertical">        <TextView android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="20sp"            android:id="@+id/tv_state"            android:textColor="#aa000000"            android:text="下拉刷新"/>        <TextView android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="14sp"            android:id="@+id/tv_time"            android:textColor="@android:color/darker_gray"            android:text="最后刷新："/>            </LinearLayout></LinearLayout>

footerView

<?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" >    <ProgressBar        android:layout_width="30dp"        android:layout_height="30dp"        android:layout_marginBottom="10dp"        android:layout_marginTop="10dp"        android:indeterminate="true"        android:indeterminateDrawable="@drawable/indeterminate_drawable"        android:indeterminateDuration="1000" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginBottom="10dp"        android:layout_marginLeft="15dp"        android:layout_marginTop="10dp"        android:text="加载更多..."        android:textColor="#aa000000"        android:textSize="20sp" /></LinearLayout>

自定义ListView:

package com.sg31.sgpullrefresh;import java.text.SimpleDateFormat;import java.util.Date;import android.content.Context;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.animation.RotateAnimation;import android.widget.AbsListView;import android.widget.ImageView;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;// 必须手动导入import android.widget.AbsListView.OnScrollListener;;public class SGRefreshListView extends ListView implements OnScrollListener {private View headerView;// headerViewprivate ImageView iv_arrow;private ProgressBar pb_rotate;private TextView tv_state, tv_time;private View footerView;private int footerViewHeight;private int headerViewHeight;// headerView高private int downY;// 按下时y坐标private final int PULL_REFRESH = 0;// 下拉刷新的状态private final int RELEASE_REFRESH = 1;// 松开刷新的状态private final int REFRESHING = 2;// 正在刷新的状态private int currentState = PULL_REFRESH;private RotateAnimation upAnimation, downAnimation;private boolean isLoadingMore = false;// 当前是否正在处于加载更多public SGRefreshListView(Context context) {super(context);init();}public SGRefreshListView(Context context, AttributeSet attrs) {super(context, attrs);init();}private void init() {setOnScrollListener(this);initHeaderView();initRotateAnimation();initFooterView();}/** * 初始化headerView */private void initHeaderView() {headerView = View.inflate(getContext(), R.layout.refresh_header, null);iv_arrow = (ImageView) headerView.findViewById(R.id.iv_arrow);pb_rotate = (ProgressBar) headerView.findViewById(R.id.pb_rotate);tv_state = (TextView) headerView.findViewById(R.id.tv_state);tv_time = (TextView) headerView.findViewById(R.id.tv_time);headerView.measure(0, 0);// 主动通知系统去测量该view;headerViewHeight = headerView.getMeasuredHeight();headerView.setPadding(0, -headerViewHeight, 0, 0);addHeaderView(headerView);}/** * 初始化旋转动画 */private void initRotateAnimation() {upAnimation = new RotateAnimation(0, -180,RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);upAnimation.setDuration(300);upAnimation.setFillAfter(true);downAnimation = new RotateAnimation(-180, -360,RotateAnimation.RELATIVE_TO_SELF, 0.5f,RotateAnimation.RELATIVE_TO_SELF, 0.5f);downAnimation.setDuration(300);downAnimation.setFillAfter(true);}private void initFooterView() {footerView = View.inflate(getContext(), R.layout.refresh_footer, null);footerView.measure(0, 0);// 主动通知系统去测量该view;footerViewHeight = footerView.getMeasuredHeight();// 隐藏footerView.setPadding(0, -footerViewHeight, 0, 0);addFooterView(footerView);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:downY = (int) ev.getY();break;case MotionEvent.ACTION_MOVE:if (currentState == REFRESHING) {break;}int deltaY = (int) (ev.getY() - downY);int paddingTop = -headerViewHeight + deltaY;if (paddingTop > -headerViewHeight&& getFirstVisiblePosition() == 0) {headerView.setPadding(0, paddingTop, 0, 0);// Log.e("RefreshListView", "paddingTop: "+paddingTop);if (paddingTop >= 0 && currentState == PULL_REFRESH) {// 从下拉刷新进入松开刷新状态currentState = RELEASE_REFRESH;refreshHeaderView();} else if (paddingTop < 0 && currentState == RELEASE_REFRESH) {// 进入下拉刷新状态currentState = PULL_REFRESH;refreshHeaderView();}return true;// 拦截TouchMove，不让listview处理该次move事件,会造成listview无法滑动}break;case MotionEvent.ACTION_UP:if (currentState == PULL_REFRESH) {// 隐藏headerViewheaderView.setPadding(0, -headerViewHeight, 0, 0);} else if (currentState == RELEASE_REFRESH) {headerView.setPadding(0, 0, 0, 0);currentState = REFRESHING;refreshHeaderView();if (listener != null) {listener.onPullRefresh();}}break;}return super.onTouchEvent(ev);}/** * 根据currentState来更新headerView */private void refreshHeaderView() {switch (currentState) {case PULL_REFRESH:tv_state.setText("下拉刷新");iv_arrow.startAnimation(downAnimation);break;case RELEASE_REFRESH:tv_state.setText("松开刷新");iv_arrow.startAnimation(upAnimation);break;case REFRESHING:iv_arrow.clearAnimation();// 因为向上的旋转动画有可能没有执行完iv_arrow.setVisibility(View.INVISIBLE);pb_rotate.setVisibility(View.VISIBLE);tv_state.setText("正在刷新...");break;}}/** * 完成刷新操作，重置状态,在你获取完数据并更新完adater之后，去在UI线程中调用该方法 */public void completeRefresh() {if (isLoadingMore) {// 重置footerView状态footerView.setPadding(0, -footerViewHeight, 0, 0);isLoadingMore = false;} else {// 重置headerView状态headerView.setPadding(0, -headerViewHeight, 0, 0);currentState = PULL_REFRESH;pb_rotate.setVisibility(View.INVISIBLE);iv_arrow.setVisibility(View.VISIBLE);tv_state.setText("下拉刷新");tv_time.setText("最后刷新：" + getCurrentTime());}}/** * 获取当前系统时间，并格式化 *  * @return */private String getCurrentTime() {SimpleDateFormat format = new SimpleDateFormat("yy-MM-dd HH:mm:ss");return format.format(new Date());}private OnRefreshListener listener;public void setOnRefreshListener(OnRefreshListener listener) {this.listener = listener;}public interface OnRefreshListener {void onPullRefresh();void onLoadingMore();}/** * SCROLL_STATE_IDLE:闲置状态，就是手指松开 SCROLL_STATE_TOUCH_SCROLL：手指触摸滑动，就是按着来滑动 * SCROLL_STATE_FLING：快速滑动后松开 */public void onScrollStateChanged(AbsListView view, int scrollState) {if (scrollState == OnScrollListener.SCROLL_STATE_IDLE&& getLastVisiblePosition() == (getCount() - 1)&& !isLoadingMore) {isLoadingMore = true;footerView.setPadding(0, 0, 0, 0);// 显示出footerViewsetSelection(getCount());// 让listview最后一条显示出来if (listener != null) {listener.onLoadingMore();}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {}}

主控制器:

package com.sg31.sgpullrefresh;import java.util.ArrayList;import com.sg31.sgpullrefresh.SGRefreshListView.OnRefreshListener;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.os.Handler;import android.os.SystemClock;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.widget.BaseAdapter;import android.widget.TextView;public class MainActivity extends ActionBarActivity {private SGRefreshListView refreshListView;private ArrayList<String> list = new ArrayList<String>();private MyAdapter adapter;private Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {// 更新UIadapter.notifyDataSetChanged();refreshListView.completeRefresh();};};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);initView();initData();}private void initView() {requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.activity_main);refreshListView = (SGRefreshListView) findViewById(R.id.refreshListView);}private void initData() {for (int i = 0; i < 15; i++) {list.add("listview原来的数据 - " + i);}// final View headerView = View.inflate(this, R.layout.layout_header,// null);// 第一种方法// headerView.getViewTreeObserver().addOnGlobalLayoutListener(new// OnGlobalLayoutListener() {// @Override// public void onGlobalLayout() {// headerView.getViewTreeObserver().removeGlobalOnLayoutListener(this);// int headerViewHeight = headerView.getHeight();////// Log.e("MainActivity", "headerViewHeight: "+headerViewHeight);// headerView.setPadding(0, -headerViewHeight, 0, 0);// refreshListView.addHeaderView(headerView);//// }// });// 第二种方法// headerView.measure(0, 0);//主动通知系统去测量// int headerViewHeight = headerView.getMeasuredHeight();// Log.e("MainActivity", "headerViewHeight: "+headerViewHeight);// headerView.setPadding(0, -headerViewHeight, 0, 0);// refreshListView.addHeaderView(headerView);//adapter = new MyAdapter();refreshListView.setAdapter(adapter);refreshListView.setOnRefreshListener(new OnRefreshListener() {@Overridepublic void onPullRefresh() {// 需要联网请求服务器的数据，然后更新UIrequestDataFromServer(false);}@Overridepublic void onLoadingMore() {requestDataFromServer(true);}});}/** * 模拟向服务器请求数据 */private void requestDataFromServer(final boolean isLoadingMore) {new Thread() {public void run() {SystemClock.sleep(3000);// 模拟请求服务器的一个时间长度if (isLoadingMore) {list.add("加载更多的数据-1");list.add("加载更多的数据-2");list.add("加载更多的数据-3");} else {list.add(0, "下拉刷新的数据");}// 在UI线程更新UIhandler.sendEmptyMessage(0);};}.start();}class MyAdapter extends BaseAdapter {public int getCount() {return list.size();}public Object getItem(int position) {return null;}public long getItemId(int position) {return 0;}public View getView(int position, View convertView, ViewGroup parent) {TextView textView = new TextView(MainActivity.this);textView.setPadding(20, 20, 20, 20);textView.setTextSize(18);textView.setText(list.get(position));return textView;}}}