XL..

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main

package animtest.com.example.e531.xlistview_demo1;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import com.google.gson.Gson;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import animtest.com.example.e531.xlistview_demo1.Bean.DataDataBean;
import animtest.com.example.e531.xlistview_demo1.Utils.MyTask;
import animtest.com.example.e531.xlistview_demo1.adapter.MyAdapter;
import animtest.com.example.e531.xlistview_demo1.view.XListView;

public class MainActivity extends AppCompatActivity {

private MyAdapter myAdapter;
private XListView xListView;
//当前页数
private int pageIndex=1;

//定义一个大集合
private List<DataDataBean.DataBean> lists=new ArrayList<DataDataBean.DataBean>();

private Handler myHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
if(msg.what==1){
xListView.stopLoadMore();//关闭底部视图
}else{

Date date=new Date(System.currentTimeMillis());
//yyyy-MM-dd HH:mm:ss
SimpleDateFormat simpleDateFormat=new SimpleDateFormat("HH:mm");
String updateTime=simpleDateFormat.format(date);
//设置刷新时间
xListView.setRefreshTime(updateTime);

xListView.stopRefresh();//关闭头部视图
}

}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

xListView= (XListView) findViewById(R.id.xlv);

//支持下拉刷新
xListView.setPullRefreshEnable(true);
//支持上拉加载更多
xListView.setPullLoadEnable(true);

//设置监听事件
xListView.setXListViewListener(new XListView.IXListViewListener() {
@Override
public void onRefresh() {//刷新回调的接口
//请求第一页的数据
MyTask myTask=new MyTask(new MyTask.Icallbacks() {
@Override
public void updateUiByjson(String jsonstr) {
Gson gson=new Gson();
DataDataBean bean=gson.fromJson(jsonstr, DataDataBean.class);
//添加到大集合对象中
lists.addAll(0,bean.getData());
//设置适配器
setAdapter();

//延迟关闭头部视图
myHandler.sendEmptyMessageDelayed(2,500);

}
});
myTask.execute("http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=1");

}

@Override
public void onLoadMore() {//加载更多回调的接口方法
pageIndex++;
Log.d("zzz","*************");
MyTask myTask=new MyTask(new MyTask.Icallbacks() {
@Override
public void updateUiByjson(String jsonstr) {
Log.d("zzz",jsonstr);

Gson gson=new Gson();
DataDataBean bean=gson.fromJson(jsonstr, DataDataBean.class);

//将最新请求的数据添加到大集合对象中，
lists.addAll(bean.getData());
//设置适配器
setAdapter();

//关闭底部视图
myHandler.sendEmptyMessageDelayed(1,500);

}
});
myTask.execute("http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page="+pageIndex);

}
});

//初使化
requestNetData();

}

private void requestNetData() {
MyTask myTask=new MyTask(new MyTask.Icallbacks() {
@Override
public void updateUiByjson(String jsonstr) {
Gson gson=new Gson();
DataDataBean bean=gson.fromJson(jsonstr, DataDataBean.class);
//添加到大集合对象中
lists.addAll(bean.getData());
//设置适配器
setAdapter();

}
});
myTask.execute("http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=1");

}

public void setAdapter(){
if(myAdapter==null){
myAdapter=new MyAdapter(this,lists);
xListView.setAdapter(myAdapter);
}else{
myAdapter.notifyDataSetChanged();
}
}

}

view--XListView

/**
* @file XListView.java
* @package me.maxwin.view
* @create Mar 18, 2012 6:28:41 PM
* @author Maxwin
* @description An ListView support (a) Pull down to refresh, (b) Pull up to load more.
* Implement IXListViewListener, and see stopRefresh() / stopLoadMore().
*/
package animtest.com.example.e531.xlistview_demo1.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

import animtest.com.example.e531.xlistview_demo1.R;

public class XListView extends ListView implements OnScrollListener {

private float mLastY = -1; // save event y
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;

// -- header view
private XListViewHeader mHeaderView;
// header view content, use it to calculate the Header's height. And hide it
// when disable pull refresh.
private RelativeLayout mHeaderViewContent;
private TextView mHeaderTimeView;
private int mHeaderViewHeight; // header view's height
private boolean mEnablePullRefresh = true;
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;
private final static int SCROLLBACK_HEADER = 0;
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);

// init header view
mHeaderView = new XListViewHeader(context);
mHeaderViewContent = (RelativeLayout) mHeaderView
.findViewById(R.id.xlistview_header_content);
mHeaderTimeView = (TextView) mHeaderView
.findViewById(R.id.xlistview_header_time);
addHeaderView(mHeaderView);

// init footer view
mFooterView = new XListViewFooter(context);

// init header height
mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
mHeaderViewHeight = mHeaderViewContent.getHeight();
getViewTreeObserver()
.removeGlobalOnLayoutListener(this);
}
});
}

@Override
public void setAdapter(ListAdapter adapter) {
// make sure XListViewFooter is the last footer view, and only add once.
if (mIsFooterReady == false) {
mIsFooterReady = true;
addFooterView(mFooterView);
}
super.setAdapter(adapter);
}

/**
* enable or disable pull down refresh feature.
*
* @param enable
*/
public void setPullRefreshEnable(boolean enable) {
mEnablePullRefresh = enable;
if (!mEnablePullRefresh) { // disable, hide the content
mHeaderViewContent.setVisibility(View.INVISIBLE);
} else {
mHeaderViewContent.setVisibility(View.VISIBLE);
}
}

/**
* enable or disable pull up load more feature.
*
* @param enable
*/
public void setPullLoadEnable(boolean enable) {
mEnablePullLoad = enable;
if (!mEnablePullLoad) {
mFooterView.hide();
mFooterView.setOnClickListener(null);
//make sure "pull up" don't show a line in bottom when listview with one page
setFooterDividersEnabled(false);
} 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.
*/
public void stopRefresh() {
if (mPullRefreshing == true) {
mPullRefreshing = false;
resetHeaderHeight();
}
}

/**
* stop load more, reset footer view.
*/
public void stopLoadMore() {
if (mPullLoading == true) {
mPullLoading = false;
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}

/**
* set last refresh time
*
* @param time
*/
public void setRefreshTime(String time) {
mHeaderTimeView.setText(time);
}

private void invokeOnScrolling() {
if (mScrollListener instanceof OnXScrollListener) {
OnXScrollListener l = (OnXScrollListener) mScrollListener;
l.onXScrolling(this);
}
}

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);
}
}
setSelection(0); // scroll to top each time
}

/**
* reset header view's height.
*/
private void resetHeaderHeight() {
int height = mHeaderView.getVisiableHeight();
if (height == 0) // not visible.
return;
// refreshing and header isn't shown fully. do nothing.
if (mPullRefreshing && height <= mHeaderViewHeight) {
return;
}
int finalHeight = 0; // default: scroll back to dismiss header.
// is refreshing, just scroll back to show all the header.
if (mPullRefreshing && height > mHeaderViewHeight) {
finalHeight = mHeaderViewHeight;
}
mScrollBack = SCROLLBACK_HEADER;
mScroller.startScroll(0, height, 0, finalHeight - height,
SCROLL_DURATION);
// trigger computeScroll
invalidate();
}

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
// more.
mFooterView.setState(XListViewFooter.STATE_READY);
} else {
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}
mFooterView.setBottomMargin(height);

// setSelection(mTotalItemCount - 1); // scroll to bottom
}

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) {
mLastY = ev.getRawY();
}

switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastY = ev.getRawY();
break;
case MotionEvent.ACTION_MOVE:
final float deltaY = ev.getRawY() - mLastY;
mLastY = ev.getRawY();
if (getFirstVisiblePosition() == 0
&& (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
// 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)) {
// last item, already pulled up or want to pull up.
updateFooterHeight(-deltaY / OFFSET_RADIO);
}
break;
default:
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.
*/
public interface IXListViewListener {
public void onRefresh();

public void onLoadMore();
}
}

XListViewFooter

XListViewHeader

/**
* @file XListViewHeader.java
* @create Apr 18, 2012 5:22:27 PM
* @author Maxwin
* @description XListView's header
*/
package animtest.com.example.e531.xlistview_demo1.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

import animtest.com.example.e531.xlistview_demo1.R;

public class XListViewHeader extends LinearLayout {
private LinearLayout mContainer;
private ImageView mArrowImageView;
private ProgressBar mProgressBar;
private TextView mHintTextView;
private int mState = STATE_NORMAL;

private Animation mRotateUpAnim;
private Animation mRotateDownAnim;

private final int ROTATE_ANIM_DURATION = 180;

public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_REFRESHING = 2;

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
LayoutParams lp = new 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);

mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
mRotateUpAnim.setFillAfter(true);
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;
}

public void setVisiableHeight(int height) {
if (height < 0)
height = 0;
LayoutParams lp = (LayoutParams) mContainer
.getLayoutParams();
lp.height = height;
mContainer.setLayoutParams(lp);
}

public int getVisiableHeight() {
return mContainer.getLayoutParams().height;
}

}

Utils--MyTask

package animtest.com.example.e531.xlistview_demo1.Utils;

import android.os.AsyncTask;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
* 使用AsyncTask+HttpURLConnection请求数据
* Created by e531 on 2017/10/12.
*/
public class MyTask extends AsyncTask<String,Void,String> {

//申请一个接口类对象
private Icallbacks icallbacks;

//将无参构造设置成私有的，使之在外部不能够调用
private MyTask(){}

//定义有参构造方法
public MyTask(Icallbacks icallbacks) {
this.icallbacks = icallbacks;
}

@Override
protected String doInBackground(String... params) {
String str="";

try {
//使用HttpUrlConnection
URL url=new URL(params[0]);
HttpURLConnection connection=(HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);

if(connection.getResponseCode()==200){
InputStream inputStream=connection.getInputStream();
//调用工具类中的静态方法
str=StreamToString.streamToStr(inputStream,"utf-8");
}

} catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}

return str;
}

@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
//解析，封装到bean,更新ui组件
icallbacks.updateUiByjson(s);

}
//定义一个接口
public interface Icallbacks{
/**
* 根据回传的json字符串，解析并更新页面组件
* @param jsonstr
*/
void updateUiByjson(String jsonstr);
}
}

StreamToString

package animtest.com.example.e531.xlistview_demo1.Utils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
* Created by e531 on 2017/10/12.
*/
public class StreamToString {

public static String streamToStr(InputStream inputStream,String chartSet){

StringBuilder builder=new StringBuilder();
try {
BufferedReader br=new BufferedReader(new InputStreamReader(inputStream,chartSet));
String con;
while ((con=br.readLine())!=null){
builder.append(con);
}

br.close();
return builder.toString();

} catch (Exception e) {
e.printStackTrace();
}

return "";
}
}

adapter--MyAdapter

package animtest.com.example.e531.xlistview_demo1.adapter;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

import animtest.com.example.e531.xlistview_demo1.Bean.DataDataBean;
import animtest.com.example.e531.xlistview_demo1.R;

/**
* @author Zhanghj
* @date 2017/10/11
* @description:
*/
public class MyAdapter extends BaseAdapter{
Context context;
List<DataDataBean.DataBean> list;

public MyAdapter(Context context, List<DataDataBean.DataBean> list) {
this.context = context;
this.list = list;
}

@Override
public int getCount() {
return list.size();
}

/**
* 获取当前条目展示的内容
* @param i
* @return
*/
@Override
public Object getItem(int i) {
return list.get(i);
}

/**
* 获取当前条目的id,,,,只要唯一就可以
* @param i
* @return
*/
@Override
public long getItemId(int i) {
return i;
}

@Override
public View getView(int i, View view, ViewGroup viewGroup) {
ViewHolder holder;
if (view == null){
view = View.inflate(context, R.layout.item_layout,null);
holder = new ViewHolder();

holder.textView = (TextView)view.findViewById(R.id.text_title);

view.setTag(holder);
}else {
holder = (ViewHolder) view.getTag();
}

holder.textView.setText(list.get(i).getTitle());

return view;
}

private class ViewHolder{
ImageView imageView;
TextView textView;
}
}

Bean--DataDataBean

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