package com.example.headpull;
import java.text.SimpleDateFormat;
import java.util.Date;
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.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
public class PullToRefreshGridView extends GridView implements OnScrollListener {
private static final String TAG = "listview";
private final static int RELEASE_To_REFRESH = 0; // 释放
private final static int PULL_To_REFRESH = 1;// 下拉刷新
private final static int REFRESHING = 2; // 正在刷新
private final static int DONE = 3; // 按下
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;
private LinearLayout headView;
private TextView tipsTextview;
private TextView lastUpdatedTextView;
private ImageView arrowImageView;
private ProgressBar progressBar;
private RotateAnimation animation;
private RotateAnimation reverseAnimation;
// 用于保证startY的值在一个完整的touch事件中只被记录一次
private boolean isRecored;
private int headContentWidth;
private int headContentHeight;
private int startY;
private int firstItemIndex;
private int state;
private boolean isBack;
private OnRefreshListener refreshListener;
private boolean isRefreshable;
public PullToRefreshGridViewActivity context;
public PullToRefreshGridView(Context context) {
super(context);
this.context=(PullToRefreshGridViewActivity) context;
init(context);
}
public PullToRefreshGridView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context=(PullToRefreshGridViewActivity) context;
init(context);
}
public View getView(){
return headView;
}
private void init(Context context) {
// setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
// head 布局文件
headView = (LinearLayout) inflater.inflate(R.layout.pulldown_header, null);
// 下拉箭头
arrowImageView = (ImageView) headView.findViewById(R.id.pulldown_header_arrow);
arrowImageView.setMinimumWidth(70);
arrowImageView.setMinimumHeight(50);
// 进度条
progressBar = (ProgressBar) headView.findViewById(R.id.pulldown_header_loading);
// 下拉提示 刷新
tipsTextview = (TextView) headView.findViewById(R.id.pulldown_header_text);
//最新一次刷新时间
lastUpdatedTextView = (TextView) headView.findViewById(R.id.pulldown_header_date);
//计算head的高宽
measureView(headView);
headContentHeight = headView.getMeasuredHeight();
headContentWidth = headView.getMeasuredWidth();
//初始状态是 隐藏掉head 布局
headView.setPadding(0, -1 * headContentHeight, 0, 0);
headView.invalidate();
Log.v("size", "width:" + headContentWidth + " height:" + headContentHeight);
setOnScrollListener(this);
//下拉以及恢复动画
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);
state = DONE;
isRefreshable = false;
}
public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int arg3) {
firstItemIndex = firstVisiableItem;
}
public void onScrollStateChanged(AbsListView arg0, int arg1) {
}
public boolean onTouchEvent(MotionEvent event) {
if (isRefreshable) {
switch (event.getAction()) {
// 在down时候记录当前Y的位置
case MotionEvent.ACTION_DOWN:
if (firstItemIndex == 0 && !isRecored) {
isRecored = true;
startY = (int) event.getY();
Log.v(TAG, "在down时候记录当前位置‘");
}
break;
case MotionEvent.ACTION_UP:
if (state != REFRESHING && state != LOADING) {
if (state == DONE) {
// 什么都不做
}
//由下拉刷新状态，到done状态
if (state == PULL_To_REFRESH) {
state = DONE;
changeHeaderViewByState();
Log.v(TAG, "由下拉刷新状态，到done状态");
}
if (state == RELEASE_To_REFRESH) {
state = REFRESHING;
changeHeaderViewByState();
onRefresh();
Log.v(TAG, "由松开刷新状态，到done状态");
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_MOVE:
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0) {
Log.v(TAG, "在move时候记录下位置");
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，否则如果当列表超出屏幕的话，当在上推的时候，列表会同时进行滚动
// 可以松手去刷新了
if (state == RELEASE_To_REFRESH) {
setSelection(0);
// 往上推了，推到了屏幕足够掩盖head的程度，但是还没有推到全部掩盖的地步
if (((tempY - startY) / RATIO < headContentHeight)
&& (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
Log.v(TAG, "由松开刷新状态转变到下拉刷新状态");
}
// 一下子推到顶了
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
Log.v(TAG, "由松开刷新状态转变到done状态");
}
// 往下拉了，或者还没有上推到屏幕顶部掩盖head的地步
else {
// 不用进行特别的操作，只用更新paddingTop的值就行了
}
}
// 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);
// 下拉到可以进入RELEASE_TO_REFRESH的状态
if ((tempY - startY) / RATIO >= headContentHeight) {
state = RELEASE_To_REFRESH;
isBack = true;
changeHeaderViewByState();
Log.v(TAG, "由done或者下拉刷新状态转变到松开刷新");
}
// 上推到顶了
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
Log.v(TAG, "由DOne或者下拉刷新状态转变到done状态");
}
}
// 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) {
headView.setPadding(0, -1 * headContentHeight
+ (tempY - startY) / RATIO, 0, 0);
}
// 更新headView的paddingTop
if (state == RELEASE_To_REFRESH) {
headView.setPadding(0, (tempY - startY) / RATIO
- headContentHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
private void changeHeaderViewByState() {
switch (state) {
//松开刷新状态
case RELEASE_To_REFRESH:
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
tipsTextview.setText("松开刷新");
Log.v(TAG, "当前状态，松开刷新");
break;
//下拉刷新
case PULL_To_REFRESH:
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH状态转变来的
//箭头反转向上
if (isBack) {
isBack = false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
tipsTextview.setText("下拉刷新");
} else {
tipsTextview.setText("下拉刷新");
}
Log.v(TAG, "当前状态，下拉刷新");
break;
//刷新中 状态
case REFRESHING:
headView.setPadding(0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
tipsTextview.setText("正在刷新...");
lastUpdatedTextView.setVisibility(View.VISIBLE);
Log.v(TAG, "当前状态,正在刷新...");
break;
//刷新完毕
case DONE:
headView.setPadding(0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.z_arrow_up);
tipsTextview.setText("下拉刷新");
lastUpdatedTextView.setVisibility(View.VISIBLE);
Log.v(TAG, "当前状态，done");
break;
}
}
public void setonRefreshListener(OnRefreshListener refreshListener) {
this.refreshListener = refreshListener;
isRefreshable = true;
}
public interface OnRefreshListener {
public void onRefresh();
}
public void onRefreshComplete() {
state = DONE;
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
String date=format.format(new Date());
lastUpdatedTextView.setText("最近更新:" + date);
changeHeaderViewByState();
}
private void onRefresh() {
if (refreshListener != null) {
refreshListener.onRefresh();
}
}
// 此方法直接照搬自网络上的一个下拉刷新的demo，此处是“估计”headView的width以及height
private void measureView(View child) {
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int lpHeight = p.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 setAdapter(BaseAdapter adapter) {
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
String date=format.format(new Date());
lastUpdatedTextView.setText("最近更新:" + date);
super.setAdapter(adapter);
}
}
package com.example.headpull;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.FrameLayout.LayoutParams;
import android.widget.LinearLayout;
import android.widget.SimpleAdapter;
import com.example.headpull.PullToRefreshGridView.OnRefreshListener;
public class PullToRefreshGridViewActivity extends Activity {
private SimpleAdapter citySimpleAdapter;
public static LinearLayout head;
String[] areaName = new String[] { "南京", "苏州", "无锡", "南通", "徐州", "常州",
"扬州", "泰州", "盐城", "镇江", "淮安", "连云港", "宿迁" };
// 存放13个城市
private List<HashMap<String, String>> cityList = new ArrayList<HashMap<String, String>>();
BadgeUtil badge;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.head);
BadgeUtil.setBadgeSamsung(this, 2);
//数据模拟 城市初始化
for (int i = 0; i < areaName.length * 6; i++) {
HashMap<String, String> hashMap = new HashMap<String, String>();
hashMap.put("id", String.valueOf(i));
hashMap.put("name", areaName[i % 13].toString());
cityList.add(hashMap);
}
final PullToRefreshGridView gridView = (PullToRefreshGridView) findViewById(R.id.order_form_grid);
head = (LinearLayout) findViewById(R.id.head);
LayoutParams p = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT, Gravity.CENTER);
//获取PullToRefreshGridView里面的head布局
head.addView(gridView.getView(), p);
citySimpleAdapter = new SimpleAdapter(this, cityList,
R.layout.weather_textview, new String[] { "name" },
new int[] { R.id.txtRepDlgCity });
gridView.setAdapter(citySimpleAdapter);
gridView.setonRefreshListener(new OnRefreshListener() {
public void onRefresh() {
new AsyncTask<Void, Void, Void>() {
protected Void doInBackground(Void... params) {
try {
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
HashMap<String, String> hashMap = new HashMap<String, String>();
hashMap.put("id",String.valueOf(cityList.size()));
hashMap.put("name","刷新新增城市");
cityList.add(0,hashMap);
return null;
}
@Override
protected void onPostExecute(Void result) {
citySimpleAdapter.notifyDataSetChanged();
gridView.onRefreshComplete();
}
}.execute();
}
});
}
}
相关推荐
android GridView下拉刷新
android GridView下拉刷新完整代码 测试通过
ListViewGridView下拉刷新，上拉加载更多。很好用·
ScrollView ListView和GridView下拉刷新上拉加载更多
下拉刷新 上拉加载 GridView 源码
gridView下拉刷新、上拉加载
listview和girdview下拉刷新，上拉加载更多,GridviewTest这个类是gridview的刷新加载效果，MainActivity这个类是listview的效果
实现 listview GridView webView 下拉刷新
各种上拉加载下拉刷新的实现，有的资源别的地方下载分很高，这个多个demo压缩成了一个，每个一分不多吧 分享一下 应该满足你们的各种需求
Android PullToRefresh （ListView GridView 下拉刷新） 使用详解
android 仿google play效果，ListView/GridView下拉刷新，上拉加载更多,自动加载异步请求数据以及分页数据 package net.xinhua.activity; import net.xinhuamm.widget.TouchViewPager; import android.os.Bundle; ...
Android 下拉刷新 上拉加载更过 GridView ListView ScorllView
还不错的一个gridview和listview下拉刷新和懒加载的例子，大家可以自己再扩展其他的view
问代码实现了Gridview上拉加载和下拉刷新。本代码主要依托第三的框架，上拉加载和下拉刷新，依托于pulltofresh，对于图片的展示和缓存，则依托于universualImageload.例子已经写好了，代码测试能运行。
代码为博客示例代码：http://blog.csdn.net/lmj623565791/article/details/38238749 有问题，博客中留言
ListView下拉刷新、gridView下拉刷新、scollView下拉刷新、WebView下拉刷新 .
分析了不少网上的代码，纠正了半天，大体思路是重新写layout，使之具有下拉功能，然后gridview作为子view添加进去！
android 自定义GridView 实现下拉刷新 底部加载更多