package com.example.listviewf5;
import java.text.SimpleDateFormat;
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;
import android.widget.AbsListView.OnScrollListener;
public class MyListView extends ListView implements OnScrollListener{
private View v;
private int headHeight;// 头部的高度
private int downY;// 按下时候Y坐标
private final int PULL_REF = 0;// 下拉
private final int REL_REF = 1;// 松开刷新
private final int REFING = 2;// 刷新中
private int currentState = PULL_REF;
private TextView tv;
private TextView tvtiem;
private ImageView img;
private ProgressBar pb;
private int footHeight;
private View foot;
private boolean footstate=false;//当前是否正在处于加载更多
// 旋转动画
private RotateAnimation upAnimation, downAnimation;
public MyListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
initView(context);
}
public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
initView(context);
}
public MyListView(Context context) {
super(context);
// TODO Auto-generated constructor stub
initView(context);
}
/**
* 加载顶部布局文件
*
* @param context
*/
private void initView(Context context) {
setOnScrollListener(this);
// LayoutInflater in =LayoutInflater.from(context);
// v = in.inflate(R.layout.head,null);
v = View.inflate(context, R.layout.head, null);
this.addHeaderView(v);
v.measure(0, 0);// 通知系统测量宽高
headHeight = v.getMeasuredHeight();// 得到测量后的高度
v.setPadding(0, -headHeight, 0, 0);// 进行隐藏head,就是把paddingtop设置成负高度
tv = (TextView) v.findViewById(R.id.head_tv);
tvtiem = (TextView) v.findViewById(R.id.head_tvtime);
img = (ImageView) v.findViewById(R.id.head_img);
pb = (ProgressBar) v.findViewById(R.id.pb);
initFoot();
initHeadRotateAnimation();
}
//加载底部布局
private void initFoot() {
foot = View.inflate(getContext(), R.layout.foot, null);
addFooterView(foot);
foot.measure(0, 0);
footHeight = foot.getMeasuredHeight();
foot.setPadding(0, 0, 0,-footHeight);
}
private void initHeadRotateAnimation() {
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);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downY = (int) ev.getY();
break;
case MotionEvent.ACTION_MOVE:
// 如果是正在刷新状态滑动没有
if (currentState == REFING) {
break;
}
int deltaY = (int) (ev.getY() - downY);// 得到移动的距离
int currentHeight = -headHeight + deltaY;
// 判断当前的距离是不是大于headHeight 并且显示的是第一个位置
if (currentHeight > -headHeight && getFirstVisiblePosition() == 0) {
v.setPadding(0, currentHeight, 0, 0);// 展现头部
if (currentHeight >= 0 && currentState == PULL_REF) {
currentState = REL_REF;
refHeadView();
} else if (currentHeight < 0 && currentState == REL_REF) {
currentState = PULL_REF;
refHeadView();
}
return true;// 拦截事件不让listview处理
}
break;
case MotionEvent.ACTION_UP:
// 判断当前是不是要刷新状态
if (currentState == PULL_REF) {
v.setPadding(0, -headHeight, 0, 0);
} else if (currentState == REL_REF) {
currentState = REFING;
v.setPadding(0, 0, 0, 0);
refHeadView();
if (listener != null) {
listener.setPullRfe();
}
}
break;
}
return super.onTouchEvent(ev);
}
private void refHeadView() {
switch (currentState) {
case PULL_REF:
tv.setText("下拉刷新");
img.startAnimation(downAnimation);
break;
case REL_REF:
tv.setText("松开刷新");
img.startAnimation(upAnimation);
break;
case REFING:
tv.setText("正在刷新……");
img.setVisibility(View.GONE);
img.clearAnimation();
pb.setVisibility(View.VISIBLE);
break;
default:
break;
}
}
// 刷新完成要把控件和状态重置
public void completeRef() {
v.setPadding(0, -headHeight, 0, 0);// 展现头部
currentState = PULL_REF;
tv.setText("下拉刷新");
img.setVisibility(View.VISIBLE);
pb.setVisibility(View.GONE);
SimpleDateFormat sDateFormat = new SimpleDateFormat(
"yyyy-MM-dd hh:mm:ss");
String date = sDateFormat.format(new java.util.Date());
tvtiem.setText("最后刷新:" + date);
}
private OnRefLisner listener;
public void setOnRefLisner(OnRefLisner listener) {
this.listener = listener;
}
// 回调接口
public interface OnRefLisner {
void setPullRfe();
void setDownRfe();
}
@Override
public void onScroll(AbsListView arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void onScrollStateChanged(AbsListView arg0, int state) {
if(state==OnScrollListener.SCROLL_STATE_IDLE
&& getLastVisiblePosition()==(getCount()-1)&&footstate==false){
foot.setPadding(0, 0, 0, 0);
setSelection(getCount());
footstate = true;
if(listener!=null){
listener.setDownRfe();
}
}
}
public void completeDown(){
footstate=false;
foot.setPadding(0, 0, 0,-footHeight);
}
}
package com.example.listviewf5;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.example.listviewf5.MyListView.OnRefLisner;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.view.Menu;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
private MyListView lv;
private List<Map<String, Object>> list;
private SimpleAdapter sa;
private Handler handler = new Handler(){
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 0:
sa.notifyDataSetChanged();
lv.completeRef();
break;
case 1:
lv.completeDown();
break;
default:
break;
}
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (MyListView) findViewById(R.id.lv);
list = new ArrayList<Map<String,Object>>();
for (int i = 0; i <20; i++) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("key1","神马都是浮云");
map.put("key2","heheda");
list.add(map);
}
sa = new SimpleAdapter(this, list,R.layout.item_lv, new String[]{"key1","key2"},new int[]{R.id.tv,R.id.tv2});
lv.setAdapter(sa);
lv.setOnRefLisner(new OnRefLisner() {
@Override
public void setPullRfe() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("key1","下拉更新的数据");
map.put("key2","hehedaheheda");
list.add(0, map);
handler.sendEmptyMessageDelayed(0,3000);
}
@Override
public void setDownRfe() {
for (int i = 0; i < 2; i++) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("key1","下拉更新的数据"+i);
map.put("key2","hehedaheheda");
list.add(list.size(), map);
}
handler.sendEmptyMessageDelayed(1,3000);
}
});
}
}
<?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:orientation="horizontal"
android:gravity="center">
<ProgressBar
android:id="@+id/foot_pb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="20dp" />
<TextView
android:id="@+id/foot_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="加载更多..."
android:textSize="20sp"
android:textStyle="bold"/>
</LinearLayout>
