一、效果图
二、主要布局文件
activity_list.xml
<?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="match_parent"
android:orientation="vertical" >
<com.johnny.testheadrefresh.PullToRefreshView
android:id="@+id/pullToRefreshView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="8dp" >
</ListView>
</com.johnny.testheadrefresh.PullToRefreshView>
</LinearLayout>
list_item.xml
<?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="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="@+id/list_image"
android:layout_width="72dp"
android:layout_height="72dp" />
<TextView
android:id="@+id/list_textview"
android:layout_width="match_parent"
android:layout_height="72dp" />
</LinearLayout>
refresh_footer.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pull_to_refresh_header"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingBottom="10dip"
android:paddingTop="10dip" >
<ProgressBar
android:id="@+id/pull_to_load_progress"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:layout_marginTop="10dip"
android:indeterminate="true"
android:visibility="gone" />
<ImageView
android:id="@+id/pull_to_load_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:gravity="center"
android:src="@drawable/ic_pulltorefresh_arrow_up"
android:visibility="visible" />
<TextView
android:id="@+id/pull_to_load_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:textColor="#999999"
android:text="@string/pull_to_refresh_footer_pull_label"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold" />
</RelativeLayout>
refresh_header.xml
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (C) 2011 Johan Nilsson <http://markupartist.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pull_to_refresh_header"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingBottom="15dip"
android:paddingTop="10dip" >
<ProgressBar
android:id="@+id/pull_to_refresh_progress"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:layout_marginTop="10dip"
android:indeterminate="true"
android:visibility="gone" />
<ImageView
android:id="@+id/pull_to_refresh_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:gravity="center"
android:src="@drawable/ic_pulltorefresh_arrow"
android:visibility="visible" />
<TextView
android:id="@+id/pull_to_refresh_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:textColor="#999999"
android:text="@string/pull_to_refresh_pull_label"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold" />
<TextView
android:id="@+id/pull_to_refresh_updated_at"
android:layout_width="fill_parent"
android:layout_height="35dp"
android:textColor="#999999"
android:layout_below="@+id/pull_to_refresh_text"
android:layout_gravity="center"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:visibility="visible" />
</RelativeLayout>
java文件
PullToRefreshView.java
package com.johnny.testheadrefresh;
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.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.ScrollView;
import android.widget.TextView;
public class PullToRefreshView extends LinearLayout {
private static final String TAG = "PullToRefreshView";
// refresh states
private static final int PULL_TO_REFRESH = 2;
private static final int RELEASE_TO_REFRESH = 3;
private static final int REFRESHING = 4;
// pull state
private static final int PULL_UP_STATE = 0;
private static final int PULL_DOWN_STATE = 1;
/**
* last y
*/
private int mLastMotionY;
/**
* lock
*/
private boolean mLock;
/**
* header view
*/
private View mHeaderView;
/**
* footer view
*/
private View mFooterView;
/**
* list or grid
*/
private AdapterView<?> mAdapterView;
/**
* scrollview
*/
private ScrollView mScrollView;
/**
* header view height
*/
private int mHeaderViewHeight;
/**
* footer view height
*/
private int mFooterViewHeight;
/**
* header view image
*/
private ImageView mHeaderImageView;
/**
* footer view image
*/
private ImageView mFooterImageView;
/**
* header tip text
*/
private TextView mHeaderTextView;
/**
* footer tip text
*/
private TextView mFooterTextView;
/**
* header refresh time
*/
private TextView mHeaderUpdateTextView;
/**
* footer refresh time
*/
// private TextView mFooterUpdateTextView;
/**
* header progress bar
*/
private ProgressBar mHeaderProgressBar;
/**
* footer progress bar
*/
private ProgressBar mFooterProgressBar;
/**
* layout inflater
*/
private LayoutInflater mInflater;
/**
* header view current state
*/
private int mHeaderState;
/**
* footer view current state
*/
private int mFooterState;
/**
* pull state,pull up or pull down;PULL_UP_STATE or PULL_DOWN_STATE
*/
private int mPullState;
/**
* 变为向下的箭头,改变箭头方向
*/
private RotateAnimation mFlipAnimation;
/**
* 变为逆向的箭头,旋转
*/
private RotateAnimation mReverseFlipAnimation;
/**
* footer refresh listener
*/
private OnFooterRefreshListener mOnFooterRefreshListener;
/**
* footer refresh listener
*/
private OnHeaderRefreshListener mOnHeaderRefreshListener;
/**
* last update time
*/
private String mLastUpdateTime;
public PullToRefreshView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PullToRefreshView(Context context) {
super(context);
init();
}
/**
* init
*
* @description
* @param context
* hylin 2012-7-26上午10:08:33
*/
private void init() {
// Load all of the animations we need in code rather than through XML
mFlipAnimation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
mFlipAnimation.setInterpolator(new LinearInterpolator());
mFlipAnimation.setDuration(250);
mFlipAnimation.setFillAfter(true);
mReverseFlipAnimation = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
mReverseFlipAnimation.setInterpolator(new LinearInterpolator());
mReverseFlipAnimation.setDuration(250);
mReverseFlipAnimation.setFillAfter(true);
mInflater = LayoutInflater.from(getContext());
// header view 在此添加,保证是第一个添加到linearlayout的最上端
addHeaderView();
}
private void addHeaderView() {
// header view
mHeaderView = mInflater.inflate(R.layout.refresh_header, this, false);
mHeaderImageView = (ImageView) mHeaderView
.findViewById(R.id.pull_to_refresh_image);
mHeaderTextView = (TextView) mHeaderView
.findViewById(R.id.pull_to_refresh_text);
mHeaderUpdateTextView = (TextView) mHeaderView
.findViewById(R.id.pull_to_refresh_updated_at);
mHeaderProgressBar = (ProgressBar) mHeaderView
.findViewById(R.id.pull_to_refresh_progress);
// header layout
measureView(mHeaderView);
mHeaderViewHeight = mHeaderView.getMeasuredHeight();
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,
mHeaderViewHeight);
// 设置topMargin的值为负的header View高度,即将其隐藏在最上方
params.topMargin = -(mHeaderViewHeight);
// mHeaderView.setLayoutParams(params1);
addView(mHeaderView, params);
}
private void addFooterView() {
// footer view
mFooterView = mInflater.inflate(R.layout.refresh_footer, this, false);
mFooterImageView = (ImageView) mFooterView
.findViewById(R.id.pull_to_load_image);
mFooterTextView = (TextView) mFooterView
.findViewById(R.id.pull_to_load_text);
mFooterProgressBar = (ProgressBar) mFooterView
.findViewById(R.id.pull_to_load_progress);
// footer layout
measureView(mFooterView);
mFooterViewHeight = mFooterView.getMeasuredHeight();
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,
mFooterViewHeight);
// int top = getHeight();
// params.topMargin
// =getHeight();//在这里getHeight()==0,但在onInterceptTouchEvent()方法里getHeight()已经有值了,不再是0;
// getHeight()什么时候会赋值,稍候再研究一下
// 由于是线性布局可以直接添加,只要AdapterView的高度是MATCH_PARENT,那么footer view就会被添加到最后,并隐藏
addView(mFooterView, params);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
// footer view 在此添加保证添加到linearlayout中的最后
addFooterView();
initContentAdapterView();
}
/**
* init AdapterView like ListView,GridView and so on;or init ScrollView
*
* @description hylin 2012-7-30下午8:48:12
*/
private void initContentAdapterView() {
int count = getChildCount();
if (count < 3) {
throw new IllegalArgumentException(
"this layout must contain 3 child views,and AdapterView or ScrollView must in the second position!");
}
View view = null;
for (int i = 0; i < count - 1; ++i) {
view = getChildAt(i);
if (view instanceof AdapterView<?>) {
mAdapterView = (AdapterView<?>) view;
}
if (view instanceof ScrollView) {
// finish later
mScrollView = (ScrollView) view;
}
}
if (mAdapterView == null && mScrollView == null) {
throw new IllegalArgumentException(
"must contain a AdapterView or ScrollView in this layout!");
}
}
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);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
int y = (int) e.getRawY();
switch (e.getAction()) {
case MotionEvent.ACTION_DOWN:
// 首先拦截down事件,记录y坐标
mLastMotionY = y;
break;
case MotionEvent.ACTION_MOVE:
// deltaY > 0 是向下运动,< 0是向上运动
int deltaY = y - mLastMotionY;
if (isRefreshViewScroll(deltaY)) {
return true;
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
break;
}
return false;
}
/*
* 如果在onInterceptTouchEvent()方法中没有拦截(即onInterceptTouchEvent()方法中 return
* false)则由PullToRefreshView 的子View来处理;否则由下面的方法来处理(即由PullToRefreshView自己来处理)
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mLock) {
return true;
}
int y = (int) event.getRawY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// onInterceptTouchEvent已经记录
// mLastMotionY = y;
break;
case MotionEvent.ACTION_MOVE:
int deltaY = y - mLastMotionY;
if (mPullState == PULL_DOWN_STATE) {
// PullToRefreshView执行下拉
Log.i(TAG, " pull down!parent view move!");
headerPrepareToRefresh(deltaY);
// setHeaderPadding(-mHeaderViewHeight);
} else if (mPullState == PULL_UP_STATE) {
// PullToRefreshView执行上拉
Log.i(TAG, "pull up!parent view move!");
footerPrepareToRefresh(deltaY);
}
mLastMotionY = y;
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
int topMargin = getHeaderTopMargin();
if (mPullState == PULL_DOWN_STATE) {
if (topMargin >= 0) {
// 开始刷新
headerRefreshing();
} else {
// 还没有执行刷新，重新隐藏
setHeaderTopMargin(-mHeaderViewHeight);
}
} else if (mPullState == PULL_UP_STATE) {
if (Math.abs(topMargin) >= mHeaderViewHeight
+ mFooterViewHeight) {
// 开始执行footer 刷新
footerRefreshing();
} else {
// 还没有执行刷新，重新隐藏
setHeaderTopMargin(-mHeaderViewHeight);
}
}
break;
}
return super.onTouchEvent(event);
}
/**
* 是否应该到了父View,即PullToRefreshView滑动
*
* @param deltaY
* , deltaY > 0 是向下运动,< 0是向上运动
* @return
*/
private boolean isRefreshViewScroll(int deltaY) {
if (mHeaderState == REFRESHING || mFooterState == REFRESHING) {
return false;
}
//对于ListView和GridView
if (mAdapterView != null) {
// 子view(ListView or GridView)滑动到最顶端
if (deltaY > 0) {
View child = mAdapterView.getChildAt(0);
if (child == null) {
// 如果mAdapterView中没有数据,不拦截
return false;
}
if (mAdapterView.getFirstVisiblePosition() == 0
&& child.getTop() == 0) {
mPullState = PULL_DOWN_STATE;
return true;
}
int top = child.getTop();
int padding = mAdapterView.getPaddingTop();
if (mAdapterView.getFirstVisiblePosition() == 0
&& Math.abs(top - padding) <= 8) {//这里之前用3可以判断,但现在不行,还没找到原因
mPullState = PULL_DOWN_STATE;
return true;
}
} else if (deltaY < 0) {
View lastChild = mAdapterView.getChildAt(mAdapterView
.getChildCount() - 1);
if (lastChild == null) {
// 如果mAdapterView中没有数据,不拦截
return false;
}
// 最后一个子view的Bottom小于父View的高度说明mAdapterView的数据没有填满父view,
// 等于父View的高度说明mAdapterView已经滑动到最后
if (lastChild.getBottom() <= getHeight()
&& mAdapterView.getLastVisiblePosition() == mAdapterView
.getCount() - 1) {
mPullState = PULL_UP_STATE;
return true;
}
}
}
// 对于ScrollView
if (mScrollView != null) {
// 子scroll view滑动到最顶端
View child = mScrollView.getChildAt(0);
if (deltaY > 0 && mScrollView.getScrollY() == 0) {
mPullState = PULL_DOWN_STATE;
return true;
} else if (deltaY < 0
&& child.getMeasuredHeight() <= getHeight()
+ mScrollView.getScrollY()) {
mPullState = PULL_UP_STATE;
return true;
}
}
return false;
}
/**
* header 准备刷新,手指移动过程,还没有释放
*
* @param deltaY
* ,手指滑动的距离
*/
private void headerPrepareToRefresh(int deltaY) {
int newTopMargin = changingHeaderViewTopMargin(deltaY);
// 当header view的topMargin>=0时，说明已经完全显示出来了,修改header view 的提示状态
if (newTopMargin >= 0 && mHeaderState != RELEASE_TO_REFRESH) {
mHeaderTextView.setText(R.string.pull_to_refresh_release_label);
mHeaderUpdateTextView.setVisibility(View.VISIBLE);
mHeaderImageView.clearAnimation();
mHeaderImageView.startAnimation(mFlipAnimation);
mHeaderState = RELEASE_TO_REFRESH;
} else if (newTopMargin < 0 && newTopMargin > -mHeaderViewHeight) {// 拖动时没有释放
mHeaderImageView.clearAnimation();
mHeaderImageView.startAnimation(mFlipAnimation);
// mHeaderImageView.
mHeaderTextView.setText(R.string.pull_to_refresh_pull_label);
mHeaderState = PULL_TO_REFRESH;
}
}
/**
* footer 准备刷新,手指移动过程,还没有释放 移动footer view高度同样和移动header view
* 高度是一样，都是通过修改header view的topmargin的值来达到
*
* @param deltaY
* ,手指滑动的距离
*/
private void footerPrepareToRefresh(int deltaY) {
int newTopMargin = changingHeaderViewTopMargin(deltaY);
// 如果header view topMargin 的绝对值大于或等于header + footer 的高度
// 说明footer view 完全显示出来了，修改footer view 的提示状态
if (Math.abs(newTopMargin) >= (mHeaderViewHeight + mFooterViewHeight)
&& mFooterState != RELEASE_TO_REFRESH) {
mFooterTextView
.setText(R.string.pull_to_refresh_footer_release_label);
mFooterImageView.clearAnimation();
mFooterImageView.startAnimation(mFlipAnimation);
mFooterState = RELEASE_TO_REFRESH;
} else if (Math.abs(newTopMargin) < (mHeaderViewHeight + mFooterViewHeight)) {
mFooterImageView.clearAnimation();
mFooterImageView.startAnimation(mFlipAnimation);
mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);
mFooterState = PULL_TO_REFRESH;
}
}
/**
* 修改Header view top margin的值
*
* @description
* @param deltaY
* @return hylin 2012-7-31下午1:14:31
*/
private int changingHeaderViewTopMargin(int deltaY) {
LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();
float newTopMargin = params.topMargin + deltaY * 0.3f;
//这里对上拉做一下限制,因为当前上拉后然后不释放手指直接下拉,会把下拉刷新给触发了,感谢网友yufengzungzhe的指出
//表示如果是在上拉后一段距离,然后直接下拉
if(deltaY>0&&mPullState == PULL_UP_STATE&&Math.abs(params.topMargin) <= mHeaderViewHeight){
return params.topMargin;
}
//同样地,对下拉做一下限制,避免出现跟上拉操作时一样的bug
if(deltaY<0&&mPullState == PULL_DOWN_STATE&&Math.abs(params.topMargin)>=mHeaderViewHeight){
return params.topMargin;
}
params.topMargin = (int) newTopMargin;
mHeaderView.setLayoutParams(params);
invalidate();
return params.topMargin;
}
/**
* header refreshing
*
* @description hylin 2012-7-31上午9:10:12
*/
private void headerRefreshing() {
mHeaderState = REFRESHING;
setHeaderTopMargin(0);
mHeaderImageView.setVisibility(View.GONE);
mHeaderImageView.clearAnimation();
mHeaderImageView.setImageDrawable(null);
mHeaderProgressBar.setVisibility(View.VISIBLE);
mHeaderTextView.setText(R.string.pull_to_refresh_refreshing_label);
if (mOnHeaderRefreshListener != null) {
mOnHeaderRefreshListener.onHeaderRefresh(this);
}
}
/**
* footer refreshing
*
* @description hylin 2012-7-31上午9:09:59
*/
private void footerRefreshing() {
mFooterState = REFRESHING;
int top = mHeaderViewHeight + mFooterViewHeight;
setHeaderTopMargin(-top);
mFooterImageView.setVisibility(View.GONE);
mFooterImageView.clearAnimation();
mFooterImageView.setImageDrawable(null);
mFooterProgressBar.setVisibility(View.VISIBLE);
mFooterTextView
.setText(R.string.pull_to_refresh_footer_refreshing_label);
if (mOnFooterRefreshListener != null) {
mOnFooterRefreshListener.onFooterRefresh(this);
}
}
/**
* 设置header view 的topMargin的值
*
* @description
* @param topMargin
* ，为0时，说明header view 刚好完全显示出来； 为-mHeaderViewHeight时，说明完全隐藏了
* hylin 2012-7-31上午11:24:06
*/
private void setHeaderTopMargin(int topMargin) {
LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();
params.topMargin = topMargin;
mHeaderView.setLayoutParams(params);
invalidate();
}
/**
* header view 完成更新后恢复初始状态
*
* @description hylin 2012-7-31上午11:54:23
*/
public void onHeaderRefreshComplete() {
setHeaderTopMargin(-mHeaderViewHeight);
mHeaderImageView.setVisibility(View.VISIBLE);
mHeaderImageView.setImageResource(R.drawable.ic_pulltorefresh_arrow);
mHeaderTextView.setText(R.string.pull_to_refresh_pull_label);
mHeaderProgressBar.setVisibility(View.GONE);
// mHeaderUpdateTextView.setText("");
mHeaderState = PULL_TO_REFRESH;
}
/**
* Resets the list to a normal state after a refresh.
*
* @param lastUpdated
* Last updated at.
*/
public void onHeaderRefreshComplete(CharSequence lastUpdated) {
setLastUpdated(lastUpdated);
onHeaderRefreshComplete();
}
/**
* footer view 完成更新后恢复初始状态
*/
public void onFooterRefreshComplete() {
setHeaderTopMargin(-mHeaderViewHeight);
mFooterImageView.setVisibility(View.VISIBLE);
mFooterImageView.setImageResource(R.drawable.ic_pulltorefresh_arrow_up);
mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);
mFooterProgressBar.setVisibility(View.GONE);
// mHeaderUpdateTextView.setText("");
mFooterState = PULL_TO_REFRESH;
}
/**
* Set a text to represent when the list was last updated.
*
* @param lastUpdated
* Last updated at.
*/
public void setLastUpdated(CharSequence lastUpdated) {
if (lastUpdated != null) {
mHeaderUpdateTextView.setVisibility(View.VISIBLE);
mHeaderUpdateTextView.setText(lastUpdated);
} else {
mHeaderUpdateTextView.setVisibility(View.GONE);
}
}
/**
* 获取当前header view 的topMargin
*
* @description
* @return hylin 2012-7-31上午11:22:50
*/
private int getHeaderTopMargin() {
LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();
return params.topMargin;
}
/**
* lock
*
* @description hylin 2012-7-27下午6:52:25
*/
private void lock() {
mLock = true;
}
/**
* unlock
*
* @description hylin 2012-7-27下午6:53:18
*/
private void unlock() {
mLock = false;
}
/**
* set headerRefreshListener
*
* @description
* @param headerRefreshListener
* hylin 2012-7-31上午11:43:58
*/
public void setOnHeaderRefreshListener(
OnHeaderRefreshListener headerRefreshListener) {
mOnHeaderRefreshListener = headerRefreshListener;
}
public void setOnFooterRefreshListener(
OnFooterRefreshListener footerRefreshListener) {
mOnFooterRefreshListener = footerRefreshListener;
}
/**
* Interface definition for a callback to be invoked when list/grid footer
* view should be refreshed.
*/
public interface OnFooterRefreshListener {
public void onFooterRefresh(PullToRefreshView view);
}
/**
* Interface definition for a callback to be invoked when list/grid header
* view should be refreshed.
*/
public interface OnHeaderRefreshListener {
public void onHeaderRefresh(PullToRefreshView view);
}
}
MainActivity.java
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package com.johnny.testheadrefresh;
import java.util.ArrayList;
import java.util.List;
import com.johnny.testheadrefresh.PullToRefreshView.OnFooterRefreshListener;
import com.johnny.testheadrefresh.PullToRefreshView.OnHeaderRefreshListener;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private PullToRefreshView mPullToRefreshView;
private ListView listview;
private Context mContext;
private BaseAdapter adapter;
private List<ListBean> listBean;
private int currentCount = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.activity_list);
dataInit();
mPullToRefreshView = (PullToRefreshView) findViewById(R.id.pullToRefreshView);
listview = (ListView) findViewById(R.id.list);
adapter = new MainAdapter();
listview.setAdapter(adapter);
mPullToRefreshView.setOnHeaderRefreshListener(new OnHeaderRefreshListener() {
@Override
public void onHeaderRefresh(PullToRefreshView view) {
// TODO Auto-generated method stub
loadData(true);
}
});
mPullToRefreshView.setOnFooterRefreshListener(new OnFooterRefreshListener() {
@Override
public void onFooterRefresh(PullToRefreshView view) {
// TODO Auto-generated method stub
loadData(false);
}
});
}
private void dataInit(){
listBean = new ArrayList<ListBean>();
for(int i=0;i<10;i++){
ListBean bean = new ListBean();
bean.setName("测试标题"+ (i+1));
listBean.add(bean);
}
currentCount = 10;
}
private class MainAdapter extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return listBean.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return listBean.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, null);
ImageView imageView = (ImageView)convertView.findViewById(R.id.list_image);
TextView textView = (TextView) convertView.findViewById(R.id.list_textview);
ListBean bean = listBean.get(position);
imageView.setImageResource(R.drawable.ic_launcher);
textView.setText(bean.getName());
return convertView;
}
}
private void loadData(boolean isRefresh){
//刷新
if(isRefresh){
listBean.clear();
for(int i=0;i<10;i++){
ListBean bean = new ListBean();
bean.setName("测试标题"+ (i+1));
listBean.add(bean);
}
adapter.notifyDataSetChanged();
mPullToRefreshView.onHeaderRefreshComplete("最后更新：" +TimeUtil.currentTime());
currentCount = 10;
}
// 加载
else{
List<ListBean> beanmore = new ArrayList<ListBean>();
for(int i=0;i<10;i++){
ListBean bean = new ListBean();
bean.setName("测试标题"+ (i+1+currentCount));
beanmore.add(bean);
}
listBean.addAll(beanmore);
adapter.notifyDataSetChanged();
mPullToRefreshView.onFooterRefreshComplete();
currentCount += 10;
}
}
}