效果也差不多.
设置一个自定义的ListView(类名ReFlashListView)然后往里添加headler(头)布局和Footer累加到后面试图
package com.example.xialashuxin;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Date;
import static android.content.ContentValues.TAG;
public class ReFlashListView extends ListView implements OnScrollListener {
View header;// 顶部布局文件；
int headerHeight;// 顶部布局文件的高度；
int firstVisibleItem;// 当前第一个可见的item的位置；
int scrollState;// listview 当前滚动状态；
boolean isRemark;// 标记，当前是在listview最顶端摁下的；
int startY;// 摁下时的Y值；
int state;// 当前的状态；
final int NONE = 0;// 正常状态；
final int PULL = 1;// 提示下拉状态；
final int RELESE = 2;// 提示释放状态；
final int REFLASHING = 3;// 刷新状态；
IReflashListner iReflashListener;//刷新数据的接口
public ReFlashListView(Context context) {
super(context);
initView(context);
}
public ReFlashListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public ReFlashListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView(context);
}
/**
* 初始化界面，添加顶部布局文件到 listview
*
* @param context
*/
private void initView(Context context) {
LayoutInflater inflater = LayoutInflater.from(context);
header = inflater.inflate(R.layout.header_layout, null);//下拉刷新试图
measureView(header);
headerHeight = header.getMeasuredHeight();
topPadding(-headerHeight);//设置内边高度为负数是就会隐藏
this.addHeaderView(header);
View inflate = View.inflate(context, R.layout.load_layout, null);//上拉加载
this.addFooterView(inflate);
this.setOnScrollListener(this);
}
/**
* 通知父布局，占用的宽，高；
*
* @param view
*/
private void measureView(View view) {
ViewGroup.LayoutParams p = view.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int width = ViewGroup.getChildMeasureSpec(0, 0, p.width);
int height;
int tempHeight = p.height;
if (tempHeight > 0) {
height = MeasureSpec.makeMeasureSpec(tempHeight,
MeasureSpec.EXACTLY);
} else {
height = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
}
view.measure(width, height);
}
/**
* 设置header 布局 上边距；
*
* @param topPadding
*/
private void topPadding(int topPadding) {
header.setPadding(header.getPaddingLeft(), topPadding,
header.getPaddingRight(), header.getPaddingBottom());
header.invalidate();
}
int firstVisibleItemjiehe;
int totalItemCount;
@Override
public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {
this.firstVisibleItem = firstVisibleItem;
firstVisibleItemjiehe=firstVisibleItem+visibleItemCount;
this.totalItemCount=totalItemCount;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
this.scrollState = scrollState;
if(firstVisibleItemjiehe==totalItemCount){
iReflashListener.onEndflash();
Log.e(TAG, "onScrollStateChanged: 我走了" );
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
if (firstVisibleItem == 0) {
isRemark = true;
startY = (int) ev.getY();//按下时的值5
}
break;
case MotionEvent.ACTION_MOVE://移动时
onMove(ev);
break;
case MotionEvent.ACTION_UP://抬起时
if (state == RELESE) {
state = REFLASHING;
// 加载最新数据；
reflashViewByState();
iReflashListener.onReflash();
} else if (state == PULL) {
state = NONE;
isRemark = false;
reflashViewByState();
}
break;
}
return super.onTouchEvent(ev);
}
/**
* 判断移动过程操作；
*
* @param ev
*/
private void onMove(MotionEvent ev) {
if (!isRemark) {
return;
}
int tempY = (int) ev.getY();
int space = tempY - startY;
int topPadding = space - headerHeight;
switch (state) {
case NONE:
if (space > 0) {
state = PULL;
reflashViewByState();
}
break;
case PULL:
topPadding(topPadding);
if (space > headerHeight + 30
&& scrollState == SCROLL_STATE_TOUCH_SCROLL) {
state = RELESE;
reflashViewByState();
}
break;
case RELESE:
topPadding(topPadding);//负数越来越少变成正数
if (space < headerHeight + 30) {
state = PULL;
reflashViewByState();
} else if (space <= 0) {
state = NONE;
isRemark = false;
reflashViewByState();
}
break;
}
}
/**
* 根据当前状态，改变界面显示；
*/
private void reflashViewByState() {
TextView tip = (TextView) header.findViewById(R.id.tip);
ImageView arrow = (ImageView) header.findViewById(R.id.arrow);
ProgressBar progress = (ProgressBar) header.findViewById(R.id.progress);
RotateAnimation anim = new RotateAnimation(0, 180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(500);
anim.setFillAfter(true);
RotateAnimation anim1 = new RotateAnimation(180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
anim1.setDuration(500);
anim1.setFillAfter(true);
switch (state) {
case NONE:
arrow.clearAnimation();
topPadding(-headerHeight);
break;
case PULL:
arrow.setVisibility(View.VISIBLE);
progress.setVisibility(View.GONE);
tip.setText("下拉可以刷新！");
arrow.clearAnimation();
arrow.setAnimation(anim1);
break;
case RELESE:
arrow.setVisibility(View.VISIBLE);
progress.setVisibility(View.GONE);
tip.setText("松开可以刷新！");
arrow.clearAnimation();
arrow.setAnimation(anim);
break;
case REFLASHING:
topPadding(50);
arrow.setVisibility(View.GONE);
progress.setVisibility(View.VISIBLE);
tip.setText("正在刷新...");
arrow.clearAnimation();
break;
}
}
/**
* 获取完数据；
*/
public void reflashComplete() {
state = NONE;
isRemark = false;
reflashViewByState();
TextView lastupdatetime = (TextView) header
.findViewById(R.id.tip_time);
SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 hh:mm:ss");
Date date = new Date(System.currentTimeMillis());
String time = format.format(date);
lastupdatetime.setText(time);
}
//在主activity你调用
public void setInterface(IReflashListner iReflashListener){
this.iReflashListener = iReflashListener;
}
/**
* 刷新数据接口
* @author Administrator
*/
public interface IReflashListner{
void onReflash();
void onEndflash();
}
}
头布局header_layout
load_layout加载的布局底部
使用ListView时要使用自定义的呀(activity_mian.xml)
主代码中要注意设置setInterface不然会报接口方法空哦,空指针...
package com.example.xialashuxin;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements ReFlashListView.IReflashListner {
private ReFlashListView listviewText;
private MyAdapter mMyAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listviewText = (ReFlashListView) findViewById(R.id.listview_text);
mMyAdapter = new MyAdapter();
listviewText.setInterface(this);
listviewText.setAdapter(mMyAdapter);
}
@Override
public void onReflash() {
Log.e("tag", "onReflash: 我刷新了哦" );
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//获取最新数据
// setReflashData();
//通知界面显示
// showList(apk_list);
//通知listview 刷新数据完毕；
listviewText.reflashComplete();
}
}, 2000);
}
int a=20;
@Override
public void onEndflash() {
a=a+100;
mMyAdapter.notifyDataSetChanged();
}
class MyAdapter extends BaseAdapter{
@Override
public int getCount() {
return a;
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
view=View.inflate(MainActivity.this,R.layout.item,null);
TextView viewById = view.findViewById(R.id.textview);
viewById.setText("我去");
return view;
}
}
}
item
效果图
image.png