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import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.ExpandableListView;
import android.widget.ListAdapter;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;
/**
* Created by Administrator on 2016/5/9.
*/
public class Refresh extends ExpandableListView implements AbsListView.OnScrollListener {
private float mLastY = -1; // save event y
private Scroller mScroller; // used for scroll back
private AbsListView.OnScrollListener mScrollListener; // user's scroll listener
// the interface to trigger refresh and load more.
private IXListViewListener mListViewListener;
// -- header view
private XListViewHeader mHeaderView;
// header view content, use it to calculate the Header's height. And hide it
// when disable pull refresh.
private RelativeLayout mHeaderViewContent;
private TextView mHeaderTimeView;
private TextView mHeaderLastTimeTextView;
private int mHeaderViewHeight; // header view's height
private boolean mEnablePullRefresh = true;
private boolean mPullRefreshing = false; // is refreashing.
// -- footer view
private XListViewFooter mFooterView;
private boolean mEnablePullLoad;
private boolean mPullLoading;
private boolean mIsFooterReady = false;
// total list items, used to detect is at the bottom of listview.
private int mTotalItemCount;
// for mScroller, scroll back from header or footer.
private int mScrollBack;
private final static int SCROLLBACK_HEADER = 0;
private final static int SCROLLBACK_FOOTER = 1;
private final static int SCROLL_DURATION = 400; // scroll back duration
private final static int PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px
// at bottom, trigger //
// load more.
private final static float OFFSET_RADIO = 1.8f; // support iOS like pull
public Refresh(Context context) {
super(context);
initWithContext(context);
}
public Refresh(Context context, AttributeSet attrs) {
super(context, attrs);
initWithContext(context);
}
public Refresh(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initWithContext(context);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mScrollListener != null)
{
mScrollListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
// send to user's listener
mTotalItemCount = totalItemCount;
if (mScrollListener != null)
{
mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount,
totalItemCount);
}
}
@Override
public void setOnScrollListener(OnScrollListener l) {
mScrollListener = l;
}
public void setXListViewListener(IXListViewListener l)
{
mListViewListener = l;
}
// feature.
public interface OnXScrollListener extends AbsListView.OnScrollListener {
public void onXScrolling(View view);
}
/**
* implements this interface to get refresh/load more event.
*/
private void initWithContext(Context context)
{
mScroller = new Scroller(context, new DecelerateInterpolator());
// XListView need the scroll event, and it will dispatch the event to
// user's listener (as a proxy).
super.setOnScrollListener(this);
// init header view
mHeaderView = new XListViewHeader(context);
mHeaderViewContent = (RelativeLayout) mHeaderView
.findViewById(R.id.xlistview_header_content);
mHeaderTimeView = (TextView) mHeaderView
.findViewById(R.id.xlistview_header_time);
mHeaderLastTimeTextView = (TextView) mHeaderView
.findViewById(R.id.xlistview_header_last_time);
if (mHeaderTimeView.getText().equals("")
|| mHeaderTimeView.getText().equals(null))
{
mHeaderLastTimeTextView.setVisibility(View.GONE);
mHeaderTimeView.setVisibility(View.GONE);
}
addHeaderView(mHeaderView);
// init footer view
mFooterView = new XListViewFooter(context);
// init header height
mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener()
{
@SuppressWarnings("deprecation")
@Override
public void onGlobalLayout()
{
mHeaderViewHeight = mHeaderViewContent.getHeight();
getViewTreeObserver()
.removeGlobalOnLayoutListener(this);
}
});
}
@Override
public void setAdapter(ListAdapter adapter) {
if (mIsFooterReady == false)
{
mIsFooterReady = true;
addFooterView(mFooterView);
}
super.setAdapter(adapter);
}
public View getFooterView()
{
return mFooterView;
}
public void setPullRefreshEnable(boolean enable)
{
mEnablePullRefresh = enable;
if (!mEnablePullRefresh)
{ // disable, hide the content
mHeaderViewContent.setVisibility(View.INVISIBLE);
}
else
{
mHeaderViewContent.setVisibility(View.VISIBLE);
}
}
public void setPullLoadEnable(boolean enable)
{
mEnablePullLoad = enable;
if (!mEnablePullLoad)
{
mFooterView.hide();
mFooterView.setOnClickListener(null);
}
else
{
mPullLoading = false;
mFooterView.show();
mFooterView.setState(XListViewFooter.STATE_NORMAL);
// both "pull up" and "click" will invoke load more.
mFooterView.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
startLoadMore();
}
});
}
}
public void stopRefresh()
{
if (mPullRefreshing == true)
{
mPullRefreshing = false;
resetHeaderHeight();
}
}
public void stopLoadMore()
{
if (mPullLoading == true)
{
mPullLoading = false;
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}
public void setRefreshTime(String time)
{
mHeaderTimeView.setText(time);
mHeaderLastTimeTextView.setVisibility(View.VISIBLE);
mHeaderTimeView.setVisibility(View.VISIBLE);
}
private void updateHeaderHeight(float delta)
{
mHeaderView.setVisiableHeight((int) delta
+ mHeaderView.getVisiableHeight());
if (mEnablePullRefresh && !mPullRefreshing)
{
if (mHeaderView.getVisiableHeight() > mHeaderViewHeight)
{
mHeaderView.setState(XListViewHeader.STATE_READY);
}
else
{
mHeaderView.setState(XListViewHeader.STATE_NORMAL);
}
}
setSelection(0); // scroll to top each time
}
private void resetHeaderHeight()
{
int height = mHeaderView.getVisiableHeight();
if (height == 0) // not visible.
return;
// refreshing and header isn't shown fully. do nothing.
if (mPullRefreshing && height <= mHeaderViewHeight)
{
return;
}
int finalHeight = 0; // default: scroll back to dismiss header.
// is refreshing, just scroll back to show all the header.
if (mPullRefreshing && height > mHeaderViewHeight)
{
finalHeight = mHeaderViewHeight;
}
mScrollBack = SCROLLBACK_HEADER;
mScroller.startScroll(0, height, 0, finalHeight - height,
SCROLL_DURATION);
// trigger computeScroll
invalidate();
}
private void updateFooterHeight(float delta)
{
int height = mFooterView.getBottomMargin() + (int) delta;
if (mEnablePullLoad && !mPullLoading)
{
if (height > PULL_LOAD_MORE_DELTA)
{ // height enough to invoke load
// more.
mFooterView.setState(XListViewFooter.STATE_READY);
}
else
{
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}
mFooterView.setBottomMargin(height);
// setSelection(mTotalItemCount - 1); // scroll to bottom
}
private void resetFooterHeight()
{
int bottomMargin = mFooterView.getBottomMargin();
if (bottomMargin > 0)
{
mScrollBack = SCROLLBACK_FOOTER;
mScroller.startScroll(0, bottomMargin, 0, -bottomMargin,
SCROLL_DURATION);
invalidate();
}
}
private void startLoadMore()
{
mPullLoading = true;
mFooterView.setState(XListViewFooter.STATE_LOADING);
if (mListViewListener != null)
{
mListViewListener.onLoadMore();
}
}
@Override
public boolean onTouchEvent(MotionEvent ev)
{
if (mLastY == -1)
{
mLastY = ev.getRawY();
}
switch (ev.getAction())
{
case MotionEvent.ACTION_DOWN:
mLastY = ev.getRawY();
break;
case MotionEvent.ACTION_MOVE:
final float deltaY = ev.getRawY() - mLastY;
mLastY = ev.getRawY();
if (getFirstVisiblePosition() == 0
&& (mHeaderView.getVisiableHeight() > 0 || deltaY > 0))
{
// the first item is showing, header has shown or pull down.
updateHeaderHeight(deltaY / OFFSET_RADIO);
invokeOnScrolling();
}
else if (getLastVisiblePosition() == mTotalItemCount - 1
&& (mFooterView.getBottomMargin() > 0 || deltaY < 0))
{
// last item, already pulled up or want to pull up.
updateFooterHeight(-deltaY / OFFSET_RADIO);
}
break;
default:
mLastY = -1; // reset
if (getFirstVisiblePosition() == 0)
{
// invoke refresh
if (mEnablePullRefresh
&& mHeaderView.getVisiableHeight() > mHeaderViewHeight)
{
mPullRefreshing = true;
mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
if (mListViewListener != null)
{
mListViewListener.onRefresh();
}
}
resetHeaderHeight();
}
else if (getLastVisiblePosition() == mTotalItemCount - 1)
{
// invoke load more.
if (mEnablePullLoad
&& mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA)
{
startLoadMore();
}
resetFooterHeight();
}
break;
}
return super.onTouchEvent(ev);
}
@Override
public void computeScroll()
{
if (mScroller.computeScrollOffset())
{
if (mScrollBack == SCROLLBACK_HEADER)
{
mHeaderView.setVisiableHeight(mScroller.getCurrY());
}
else
{
mFooterView.setBottomMargin(mScroller.getCurrY());
}
postInvalidate();
invokeOnScrolling();
}
super.computeScroll();
}
private void invokeOnScrolling()
{
if (mScrollListener instanceof OnXScrollListener)
{
OnXScrollListener l = (OnXScrollListener) mScrollListener;
l.onXScrolling(this);
}
}
public interface IXListViewListener
{
public void onRefresh();
public void onLoadMore();
}
}
里面提供了 onRefresh 和onLoadMore 两个方法
refresh.setAdapter(adapter);refresh.setVisibility(View.VISIBLE);refresh.setRefreshTime(xxxxxxx);refresh.stopRefresh();refresh.stopLoadMore();refresh.setVisbility(View.INVISIBLE);
上面是一些设置 在需要的时候调用就好
刷新成功后调用stopRefresh()和stopLoadMore()就行
刷新失败 比如没有网络的时候调用setVisibility(View.INVISIBLE)
里面的Footer的Java类
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class XListViewFooter extends LinearLayout
{
public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_LOADING = 2;
private Context mContext;
private RelativeLayout mContentView;
private LinearLayout mLoadLayout;
private TextView mHintView;
public XListViewFooter(Context context)
{
super(context);
initView(context);
}
public XListViewFooter(Context context, AttributeSet attrs)
{
super(context, attrs);
initView(context);
}
public void setState(int state)
{
mHintView.setVisibility(View.INVISIBLE);
mLoadLayout.setVisibility(View.INVISIBLE);
if (state == STATE_READY)
{
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_ready);
}
else if (state == STATE_LOADING)
{
mLoadLayout.setVisibility(View.VISIBLE);
}
else
{
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_normal);
}
}
public void setBottomMargin(int height)
{
if (height < 0)
return;
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContentView
.getLayoutParams();
lp.bottomMargin = height;
mContentView.setLayoutParams(lp);
}
public int getBottomMargin()
{
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContentView
.getLayoutParams();
return lp.bottomMargin;
}
public void normal()
{
mHintView.setVisibility(View.VISIBLE);
mLoadLayout.setVisibility(View.GONE);
}
public void loading()
{
mHintView.setVisibility(View.GONE);
mLoadLayout.setVisibility(View.VISIBLE);
}
public void hide()
{
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContentView
.getLayoutParams();
lp.height = 0;
mContentView.setLayoutParams(lp);
}
public void show()
{
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContentView
.getLayoutParams();
lp.height = LayoutParams.WRAP_CONTENT;
mContentView.setLayoutParams(lp);
}
private void initView(Context context)
{
mContext = context;
LinearLayout moreView = (LinearLayout) LayoutInflater.from(mContext)
.inflate(R.layout.fff_xlistview_footer, null);
addView(moreView);
moreView.setLayoutParams(new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
mContentView = (RelativeLayout) moreView
.findViewById(R.id.xlistview_footer_content);
mLoadLayout = (LinearLayout) moreView
.findViewById(R.id.xlistview_footer_load);
mHintView = (TextView) moreView
.findViewById(R.id.xlistview_footer_hint_textview);
}
}
footer的layout布局
<?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"
>
<RelativeLayout
android:id="@+id/xlistview_footer_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center">
<LinearLayout android:id="@+id/xlistview_footer_load"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="horizontal"
android:layout_centerInParent="true"
android:visibility="invisible">
<ProgressBar
android:id="@+id/xlistview_footer_progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/xlistview_footer_load_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/xlistview_footer_hint_loading" />
</LinearLayout>
<TextView
android:id="@+id/xlistview_footer_hint_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/xlistview_footer_hint_normal"
android:visibility="invisible" />
</RelativeLayout>
</LinearLayout>import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
public class XListViewHeader extends LinearLayout
{
public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_REFRESHING = 2;
private LinearLayout mContainer;
private ImageView mArrowImageView;
private ProgressBar mProgressBar;
private TextView mHintTextView;
private int mState = STATE_NORMAL;
private Animation mRotateUpAnim;
private Animation mRotateDownAnim;
private final int ROTATE_ANIM_DURATION = 180;
public XListViewHeader(Context context)
{
super(context);
initView(context);
}
public XListViewHeader(Context context, AttributeSet attrs)
{
super(context, attrs);
initView(context);
}
private void initView(Context context)
{
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, 0);
mContainer = (LinearLayout) LayoutInflater.from(context).inflate(
R.layout.fff_xlistview_header, null);
addView(mContainer, lp);
setGravity(Gravity.BOTTOM);
mArrowImageView = (ImageView) findViewById(R.id.xlistview_header_arrow);
mHintTextView = (TextView) findViewById(R.id.xlistview_header_hint_textview);
mProgressBar = (ProgressBar) findViewById(R.id.xlistview_header_progressbar);
mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
mRotateUpAnim.setFillAfter(true);
mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);
mRotateDownAnim.setFillAfter(true);
}
public void setState(int state)
{
if (state == mState)
return;
if (state == STATE_REFRESHING)
{
mArrowImageView.clearAnimation();
mArrowImageView.setVisibility(View.INVISIBLE);
mProgressBar.setVisibility(View.VISIBLE);
}
else
{
mArrowImageView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.INVISIBLE);
}
switch (state)
{
case STATE_NORMAL:
if (mState == STATE_READY)
{
mArrowImageView.startAnimation(mRotateDownAnim);
}
if (mState == STATE_REFRESHING)
{
mArrowImageView.clearAnimation();
}
mHintTextView.setText(R.string.xlistview_header_hint_normal);
break;
case STATE_READY:
if (mState != STATE_READY)
{
mArrowImageView.clearAnimation();
mArrowImageView.startAnimation(mRotateUpAnim);
mHintTextView.setText(R.string.xlistview_header_hint_ready);
}
break;
case STATE_REFRESHING:
mHintTextView.setText(R.string.xlistview_header_hint_loading);
break;
default:
}
mState = state;
}
public void setVisiableHeight(int height)
{
if (height < 0)
height = 0;
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContainer
.getLayoutParams();
lp.height = height;
mContainer.setLayoutParams(lp);
}
public int getVisiableHeight()
{
return mContainer.getHeight();
}
}
<?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" >
<RelativeLayout
android:id="@+id/xlistview_header_content"
android:layout_width="fill_parent"
android:layout_height="60dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:orientation="vertical" android:id="@+id/xlistview_header_text">
<TextView
android:id="@+id/xlistview_header_hint_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/xlistview_header_hint_normal" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="3dp" >
<TextView
android:id="@+id/xlistview_header_last_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/xlistview_header_last_time"
android:textSize="12sp" />
<TextView
android:id="@+id/xlistview_header_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
<ImageView
android:id="@+id/xlistview_header_arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@id/xlistview_header_text"
android:layout_centerVertical="true"
android:layout_marginLeft="-35dp"
android:src="@mipmap/xlistview_arrow" />
<ProgressBar
android:id="@+id/xlistview_header_progressbar"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignLeft="@id/xlistview_header_text"
android:layout_centerVertical="true"
android:layout_marginLeft="-40dp"
android:visibility="invisible" />
</RelativeLayout>
</LinearLayout>带有下拉刷新和上拉加载的的ExpandableListView
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原文地址：http://blog.csdn.net/dongyue8008/article/details/51361343
