主要用到了这个几个文件。MainActivity是界面的Activity,MyAdapter是ListView的自己定义适配,MyListView是自己定义带头部LIistView，假设仅仅须要上拉载入就不须要；activity_main.xml是住界面。item.xml是ListView的子布局里面仅仅有一个TextView,listview_footer.xml是listview的载入很多其它的底部布局，listview_header.xml是listview的头部布局。
MainActivity.java
package com.example.listview; import java.util.ArrayList;
import java.util.List; import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.Toast; import com.example.listview.MyListView.OnRefreshListener; public class MainActivity extends Activity implements OnScrollListener{
/** ListView*/
private MyListView listView;
/** 自己定义的Adapter*/
private MyAdapter adapter;
/** 一共的数据*/
private List<String> list=new ArrayList<String>();
/** ListView的底部布局*/
private View footer; private Handler handler; private int count=0; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/** 配置好ListView*/
listView=(MyListView) findViewById(R.id.listView); /** 加入底部布局,要在setAdapter前,否则没有效果*/
footer=LayoutInflater.from(this).inflate(R.layout.listview_footer, null);
listView.addFooterView(footer); /** 适配listView*/
adapter=new MyAdapter(this, list);
listView.setAdapter(adapter); /** 加入一个线程设置时间有等待的效果*/
handler=new Handler(); listView.setOnScrollListener(this); listView.setonRefreshListener(new OnRefreshListener() { @Override
public void onRefresh() {
new AsyncTask<Void, Void, Void>() {
protected Void doInBackground(Void... params) {
try {
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
// list.add("刷新后加入的内容");
return null;
} @Override
protected void onPostExecute(Void result) {
adapter.notifyDataSetChanged();
listView.onRefreshComplete();
}
}.execute(null, null, null); }
}); setData(); } /**
* 底部滚动的监听
*/
@Override
public void onScrollStateChanged(final AbsListView view, int scrollState) {
/** 当滚动停止同一时候在底部的时候*/
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE && (view.getLastVisiblePosition() == view.getCount() - 1)) {
/** 为了有数据载入等待的时间。假设是网络数据请求，则此处不须要直接请求接口就ok*/
handler.postDelayed(new Runnable() { @Override
public void run() {
setData();
/** 让刷新出来的数据从屏幕開始显示,假设不设定位置，listView数据更新后会跑到第一条数据開始显示*/
listView.setSelection(view.getCount()-1);
} }, 2000); } }
@Override
public void onScroll(AbsListView arg0, int arg1, int arg2, int arg3) { }
/** 放数据,假设你的数据能够分页获取就不须要这样,此处是为了有分页的数据*/
@SuppressLint("ShowToast")
private void setData(){ //当数据到达总量的时候移除底部布局
if(count>50){ listView.removeFooterView(footer); Toast.makeText(this,"没有很多其它数据", 500).show(); return;
} for(int i=count;i<count+10;i++){ list.add("数据"+i); } count=count+10;
/** 通知adapter数据改变*/
adapter.notifyDataSetChanged();
}
}
MyListView.java
package com.example.listview; import java.util.Date; 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.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
/**
* ListView加入刷新头部自己定义的ListView
*
* @author 刘梓未
*
*
*/
public class MyListView extends ListView implements OnScrollListener { private final static int RELEASE_To_REFRESH = 0;// 下拉过程的状态值
private final static int PULL_To_REFRESH = 1; // 从下拉返回到不刷新的状态值
private final static int REFRESHING = 2;// 正在刷新的状态值
private final static int DONE = 3;
private final static int LOADING = 4; // 实际的padding的距离与界面上偏移距离的比例
private final static int RATIO = 3;
private LayoutInflater inflater; // ListView头部下拉刷新的布局
private LinearLayout headerView;
private TextView lvHeaderTipsTv;
private TextView lvHeaderLastUpdatedTv;
private ImageView lvHeaderArrowIv;
private ProgressBar lvHeaderProgressBar; // 定义头部下拉刷新的布局的高度
private int headerContentHeight; private RotateAnimation animation;
private RotateAnimation reverseAnimation; private int startY;
private int state;
private boolean isBack; // 用于保证startY的值在一个完整的touch事件中仅仅被记录一次
private boolean isRecored; private OnRefreshListener refreshListener; private boolean isRefreshable; public MyListView(Context context) {
super(context);
init(context);
} public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
} private void init(Context context) {
setCacheColorHint(context.getResources().getColor(android.R.color.transparent));
inflater = LayoutInflater.from(context);
headerView = (LinearLayout) inflater.inflate(R.layout.listview_header, null);
lvHeaderTipsTv = (TextView) headerView
.findViewById(R.id.lvHeaderTipsTv);
lvHeaderLastUpdatedTv = (TextView) headerView
.findViewById(R.id.lvHeaderLastUpdatedTv); lvHeaderArrowIv = (ImageView) headerView
.findViewById(R.id.lvHeaderArrowIv);
// 设置下拉刷新图标的最小高度和宽度
lvHeaderArrowIv.setMinimumWidth(70);
lvHeaderArrowIv.setMinimumHeight(50); lvHeaderProgressBar = (ProgressBar) headerView
.findViewById(R.id.lvHeaderProgressBar);
measureView(headerView);
headerContentHeight = headerView.getMeasuredHeight();
// 设置内边距，正好距离顶部为一个负的整个布局的高度，正好把头部隐藏
headerView.setPadding(0, -1 * headerContentHeight, 0, 0);
// 重绘一下
headerView.invalidate();
// 将下拉刷新的布局加入ListView的顶部
addHeaderView(headerView, null, false);
// 设置滚动监听事件
setOnScrollListener(this); // 设置旋转动画事件
animation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
animation.setInterpolator(new LinearInterpolator());
animation.setDuration(250);
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(200);
reverseAnimation.setFillAfter(true); // 一開始的状态就是下拉刷新完的状态。所以为DONE
state = DONE;
// 是否正在刷新
isRefreshable = false;
} @Override
public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
} @Override
public boolean onTouchEvent(MotionEvent ev) {
if (isRefreshable) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
if (!isRecored) {
isRecored = true;
startY = (int) ev.getY();// 手指按下时记录当前位置
}
break;
case MotionEvent.ACTION_UP:
if (state != REFRESHING && state != LOADING) {
if (state == PULL_To_REFRESH) {
state = DONE;
changeHeaderViewByState();
}
if (state == RELEASE_To_REFRESH) {
state = REFRESHING;
changeHeaderViewByState();
onLvRefresh();
}
}
isRecored = false;
isBack = false; break; case MotionEvent.ACTION_MOVE:
int tempY = (int) ev.getY();
if (!isRecored) {
isRecored = true;
startY = tempY;
}
if (state != REFRESHING && isRecored && state != LOADING) {
// 保证在设置padding的过程中，当前的位置一直是在head。否则假设当列表超出屏幕的话，当在上推的时候。列表会同一时候进行滚动
// 能够松手去刷新了
if (state == RELEASE_To_REFRESH) {
setSelection(0);
// 往上推了。推到了屏幕足够掩盖head的程度，可是还没有推到所有掩盖的地步
if (((tempY - startY) / RATIO < headerContentHeight)// 由松开刷新状态转变到下拉刷新状态
&& (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
// 一下子推到顶了
else if (tempY - startY <= 0) {// 由松开刷新状态转变到done状态
state = DONE;
changeHeaderViewByState();
}
}
// 还没有到达显示松开刷新的时候,DONE或者是PULL_To_REFRESH状态
if (state == PULL_To_REFRESH) {
setSelection(0);
// 下拉到能够进入RELEASE_TO_REFRESH的状态
if ((tempY - startY) / RATIO >= headerContentHeight) {// 由done或者下拉刷新状态转变到松开刷新
state = RELEASE_To_REFRESH;
isBack = true;
changeHeaderViewByState();
}
// 上推到顶了
else if (tempY - startY <= 0) {// 由DOne或者下拉刷新状态转变到done状态
state = DONE;
changeHeaderViewByState();
}
}
// done状态下
if (state == DONE) {
if (tempY - startY > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
}
// 更新headView的size
if (state == PULL_To_REFRESH) {
headerView.setPadding(0, -1 * headerContentHeight
+ (tempY - startY) / RATIO, 0, 0); }
// 更新headView的paddingTop
if (state == RELEASE_To_REFRESH) {
headerView.setPadding(0, (tempY - startY) / RATIO
- headerContentHeight, 0, 0);
} }
break; default:
break;
}
}
return super.onTouchEvent(ev);
} // 当状态改变时候。调用该方法。以更新界面
private void changeHeaderViewByState() {
switch (state) {
case RELEASE_To_REFRESH:
lvHeaderArrowIv.setVisibility(View.VISIBLE);
lvHeaderProgressBar.setVisibility(View.GONE);
lvHeaderTipsTv.setVisibility(View.VISIBLE);
lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE); lvHeaderArrowIv.clearAnimation();// 清除动画
lvHeaderArrowIv.startAnimation(animation);// 開始动画效果 lvHeaderTipsTv.setText("松开刷新");
break;
case PULL_To_REFRESH:
lvHeaderProgressBar.setVisibility(View.GONE);
lvHeaderTipsTv.setVisibility(View.VISIBLE);
lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
lvHeaderArrowIv.clearAnimation();
lvHeaderArrowIv.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH状态转变来的
if (isBack) {
isBack = false;
lvHeaderArrowIv.clearAnimation();
lvHeaderArrowIv.startAnimation(reverseAnimation); lvHeaderTipsTv.setText("下拉刷新");
} else {
lvHeaderTipsTv.setText("下拉刷新");
}
break; case REFRESHING: headerView.setPadding(0, 0, 0, 0); lvHeaderProgressBar.setVisibility(View.VISIBLE);
lvHeaderArrowIv.clearAnimation();
lvHeaderArrowIv.setVisibility(View.GONE);
lvHeaderTipsTv.setText("正在刷新...");
lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
break;
case DONE:
headerView.setPadding(0, -1 * headerContentHeight, 0, 0); lvHeaderProgressBar.setVisibility(View.GONE);
lvHeaderArrowIv.clearAnimation();
lvHeaderArrowIv.setImageResource(R.drawable.head_arrow);
lvHeaderTipsTv.setText("下拉刷新");
lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
break;
}
} // 此方法直接照搬自网络上的一个下拉刷新的demo，此处是“预计”headView的width以及height
private void measureView(View child) {
ViewGroup.LayoutParams params = child.getLayoutParams();
if (params == null) {
params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0,
params.width);
int lpHeight = params.height;
int childHeightSpec;
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
} public void setonRefreshListener(OnRefreshListener refreshListener) {
this.refreshListener = refreshListener;
isRefreshable = true;
} public interface OnRefreshListener {
public void onRefresh();
} @SuppressWarnings("deprecation")
public void onRefreshComplete() {
state = DONE;
lvHeaderLastUpdatedTv.setText("近期更新:" + new Date().toLocaleString());
changeHeaderViewByState();
} private void onLvRefresh() {
if (refreshListener != null) {
refreshListener.onRefresh();
}
} }
listview_footer.xml
<? 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="wrap_content"
android:gravity="center"
android:layout_marginTop="10dp"
android:orientation="horizontal" > <ProgressBar
android:id="@+id/footer_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/> </LinearLayout>
listview_header.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- ListView的头部 -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
> <!-- 内容 --> <RelativeLayout
android:id="@+id/head_contentLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/list_header_bg"
android:paddingLeft="30dp"> <!-- 箭头图像、进度条 --> <FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true" > <!-- 箭头 --> <ImageView
android:id="@+id/lvHeaderArrowIv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/head_arrow" /> <!-- 进度条 --> <ProgressBar
android:id="@+id/lvHeaderProgressBar"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone" />
</FrameLayout> <!-- 提示、近期更新 --> <LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal"
android:orientation="vertical" > <!-- 提示 --> <TextView
android:id="@+id/lvHeaderTipsTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="下拉刷新"
android:textSize="13sp" /> <!-- 近期更新 --> <TextView
android:id="@+id/lvHeaderLastUpdatedTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="最新更新"
android:textSize="10sp" />
</LinearLayout>
</RelativeLayout> </LinearLayout>
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