Android studio XListView 插件应用

XListView中间信息

package com.bwie.xlistviewdemo1;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.annotation.SuppressLint;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;
public class XListView extends ListView implements OnScrollListener {
private float mLastY = -1; // save event y
private Scroller mScroller; // 用于回滚
private OnScrollListener mScrollListener; // 回滚监听
// 触发刷新和加载更多接口.
private IXListViewListener mListViewListener;
// -- 头部的View
private XListViewHeader mHeaderView;
// 查看头部的内容，用它计算头部高度，和隐藏它
// 当禁用的时候刷新
private RelativeLayout mHeaderViewContent;
private TextView mHeaderTimeView;
private int mHeaderViewHeight; // 头部View的高
private boolean mEnablePullRefresh = true;
private boolean mPullRefreshing = false; // 是否刷新.
// -- 底部的View
private XListViewFooter mFooterView;
private boolean mEnablePullLoad;
private boolean mPullLoading;
private boolean mIsFooterReady = false;
// 总列表项，用于检测列表视图的底部
private int mTotalItemCount;


// for mScroller, 滚动页眉或者页脚
private int mScrollBack;
private final static int SCROLLBACK_HEADER = 0;// 顶部
private final static int SCROLLBACK_FOOTER = 1;// 下部


private final static int SCROLL_DURATION = 400; // 滚动回时间
private final static int PULL_LOAD_MORE_DELTA = 50; // 当大于50PX的时候，加载更多


private final static float OFFSET_RADIO = 1.8f; // support iOS like pull
// feature.


/**
* @param context
*/
public XListView(Context context) {
super(context);
initWithContext(context);
}


public XListView(Context context, AttributeSet attrs) {
super(context, attrs);
initWithContext(context);
}


public XListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initWithContext(context);
}


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);


// 初始化头部View
mHeaderView = new XListViewHeader(context);
mHeaderViewContent = (RelativeLayout) mHeaderView
.findViewById(R.id.xlistview_header_content);
mHeaderTimeView = (TextView) mHeaderView
.findViewById(R.id.xlistview_header_time);
addHeaderView(mHeaderView);// 把头部这个视图添加进去


// 初始化底部的View
mFooterView = new XListViewFooter(context);


// 初始化头部高度
mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
mHeaderViewHeight = mHeaderViewContent.getHeight();
getViewTreeObserver()
.removeGlobalOnLayoutListener(this);
}
});
}


@Override
public void setAdapter(ListAdapter adapter) {
// 确定XListViewFooter是最后底部的View, 并且只有一次
if (mIsFooterReady == false) {
mIsFooterReady = true;
addFooterView(mFooterView);
}
super.setAdapter(adapter);
}


/**
* 启用或禁用下拉刷新功能.
* 
* @param enable
*/
public void setPullRefreshEnable(boolean enable) {
mEnablePullRefresh = enable;
if (!mEnablePullRefresh) { // 禁用,隐藏内容
mHeaderViewContent.setVisibility(View.INVISIBLE);// 如果为false则隐藏下拉刷新功能
} else {
mHeaderViewContent.setVisibility(View.VISIBLE);// 否则就显示下拉刷新功能
}
}


/**
* 启用或禁用加载更多的功能.
* 
* @param enable
*/
public void setPullLoadEnable(boolean enable) {
mEnablePullLoad = enable;
if (!mEnablePullLoad) {
mFooterView.hide();// 隐藏
mFooterView.setOnClickListener(null);
} else {
mPullLoading = false;
mFooterView.show();// 显示
mFooterView.setState(XListViewFooter.STATE_NORMAL);
// both "上拉" 和 "点击" 将调用加载更多.
mFooterView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startLoadMore();
}
});
}
}


/**
* 停止刷新, 重置头视图.
*/
public void stopRefresh() {
if (mPullRefreshing == true) {
mPullRefreshing = false;
resetHeaderHeight();
}
}


/**
* stop load more, reset footer view.
*/
public void stopLoadMore() {
if (mPullLoading == true) {
mPullLoading = false;
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}


/**
* 設置最後一次刷新時間
* 
* @param time
*/
@SuppressLint("SimpleDateFormat")
public void setRefreshTime(String time) {
SimpleDateFormat   formatter   =   new   SimpleDateFormat   ("yyyy年MM月dd日   HH:mm:ss     ");    
Date   curDate   =   new   Date(System.currentTimeMillis());
//获取当前时间   
String   str   =   formatter.format(curDate);  
mHeaderTimeView.setText(str);
}


private void invokeOnScrolling() {
if (mScrollListener instanceof OnXScrollListener) {
OnXScrollListener l = (OnXScrollListener) mScrollListener;
l.onXScrolling(this);
}
}


private void updateHeaderHeight(float delta) {
mHeaderView.setVisiableHeight((int) delta
+ mHeaderView.getVisiableHeight());
if (mEnablePullRefresh && !mPullRefreshing) { // 未处于刷新状态，更新箭头
if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
mHeaderView.setState(XListViewHeader.STATE_READY);
} else {
mHeaderView.setState(XListViewHeader.STATE_NORMAL);
}
}
setSelection(0); // scroll to top each time
}


/**
* 重置头视图的高度
*/
private void resetHeaderHeight() {
int height = mHeaderView.getVisiableHeight();
if (height == 0) // 不显示.
return;
// 不显示刷新和标题的时候，什么都不显示
if (mPullRefreshing && height <= mHeaderViewHeight) {
return;
}
int finalHeight = 0; // 默认：滚动回头.
// 当滚动回显示所有头标题时候，刷新
if (mPullRefreshing && height > mHeaderViewHeight) {
finalHeight = mHeaderViewHeight;
}
mScrollBack = SCROLLBACK_HEADER;
mScroller.startScroll(0, height, 0, finalHeight - height,
SCROLL_DURATION);
// 触发刷新
invalidate();
}


// 改变底部视图高度
private void updateFooterHeight(float delta) {
int height = mFooterView.getBottomMargin() + (int) delta;
if (mEnablePullLoad && !mPullLoading) {
if (height > PULL_LOAD_MORE_DELTA) { // 高度足以调用加载更多
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();
}
}


// 开始加载更多
private void startLoadMore() {
mPullLoading = true;
mFooterView.setState(XListViewFooter.STATE_LOADING);
if (mListViewListener != null) {
mListViewListener.onLoadMore();
}
}


// 触发事件
@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();
System.out.println("数据监测：" + getFirstVisiblePosition() + "---->"
+ getLastVisiblePosition());
if (getFirstVisiblePosition() == 0
&& (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
// 第一项显示,标题显示或拉下来.
updateHeaderHeight(deltaY / OFFSET_RADIO);
invokeOnScrolling();
} else if (getLastVisiblePosition() == mTotalItemCount - 1
&& (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {
// 最后一页，已停止或者想拉起
updateFooterHeight(-deltaY / OFFSET_RADIO);
}
break;
default:
mLastY = -1; // 重置
if (getFirstVisiblePosition() == 0) {
// 调用刷新,如果头部视图高度大于设定高度。
if (mEnablePullRefresh
&& mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
mPullRefreshing = true;// 那么刷新
mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
if (mListViewListener != null) {
mListViewListener.onRefresh();
}
}
resetHeaderHeight();// 刷新完毕，重置头部高度，也就是返回上不
}
if (getLastVisiblePosition() == mTotalItemCount - 1) {
// 调用加载更多.
if (mEnablePullLoad
&& mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA) {
startLoadMore();// 如果底部视图高度大于可以加载高度，那么就开始加载
}
resetFooterHeight();// 重置加载更多视图高度
}
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();
}


@Override
public void setOnScrollListener(OnScrollListener l) {
mScrollListener = l;
}


@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) {
// 发送到用户的监听器
mTotalItemCount = totalItemCount;
if (mScrollListener != null) {
mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount,
totalItemCount);
}
}


public void setXListViewListener(IXListViewListener l) {
mListViewListener = l;
}


/**
* 你可以监听到列表视图，OnScrollListener 或者这个. 他将会被调用 , 当头部或底部触发的时候
*/
public interface OnXScrollListener extends OnScrollListener {
public void onXScrolling(View view);
}


/**
* 实现这个接口来刷新/负载更多的事件
*/
public interface IXListViewListener {
public void onRefresh();


public void onLoadMore();
}
}

XListViewFooter上拉加载

package com.bwie.xlistviewdemo1;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
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 View mContentView;
private View mProgressBar;
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);// 开始底部控件都隐藏
mProgressBar.setVisibility(View.INVISIBLE);
mHintView.setVisibility(View.INVISIBLE);
if (state == STATE_READY) {// 如果是第一页状态，那么“查看更多”显示
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_ready);// 松开显示更多
} else if (state == STATE_LOADING) {// 当加载的时候
mProgressBar.setVisibility(View.VISIBLE);// 加载进度条显示
} else {
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_normal);// 查看更多
}
}


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;
}


/**
* normal status
*/
public void normal() {
mHintView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.GONE);
}


/**
* loading status
*/
public void loading() {
mHintView.setVisibility(View.GONE);
mProgressBar.setVisibility(View.VISIBLE);
}


/**
* 当禁用拉加载更多隐藏底部视图
*/
public void hide() {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContentView
.getLayoutParams();
lp.height = 0;
mContentView.setLayoutParams(lp);
}


/**
* 显示底部视图
*/
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.xlistview_footer, null);
addView(moreView);
moreView.setLayoutParams(new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));


mContentView = moreView.findViewById(R.id.xlistview_footer_content);
mProgressBar = moreView.findViewById(R.id.xlistview_footer_progressbar);
mHintView = (TextView) moreView
.findViewById(R.id.xlistview_footer_hint_textview);
}


}

XListViewHeader下拉刷新

package com.bwie.xlistviewdemo1;
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 {
private LinearLayout mContainer;
private ImageView mArrowImageView;
private ProgressBar mProgressBar;
private TextView mHintTextView;
private int mState = STATE_NORMAL;// 初始状态


private Animation mRotateUpAnim;
private Animation mRotateDownAnim;


private final int ROTATE_ANIM_DURATION = 180;


public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_REFRESHING = 2;


public XListViewHeader(Context context) {
super(context);
initView(context);
}


/**
* @param context
* @param attrs
*/
public XListViewHeader(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}


private void initView(Context context) {
// 初始情况，设置下拉刷新view高度为0
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, 0);
// 时间TextView
mContainer = (LinearLayout) LayoutInflater.from(context).inflate(
R.layout.xlistview_header, null);
addView(mContainer, lp);
setGravity(Gravity.BOTTOM);
// 找到头部页面里的控件
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);
}


// 设置状态
public void setState(int state) {
if (state == mState)
return;


if (state == STATE_REFRESHING) { // 显示进度
mArrowImageView.clearAnimation();
mArrowImageView.setVisibility(View.INVISIBLE);// 不显示图片
mProgressBar.setVisibility(View.VISIBLE);// 显示进度条
} else { // 显示箭头图片
mArrowImageView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.INVISIBLE);
}


switch (state) {
case STATE_NORMAL:
if (mState == STATE_READY) {// 当状态时准备的时候，显示动画
mArrowImageView.startAnimation(mRotateDownAnim);
}
if (mState == STATE_REFRESHING) {// 当状态显示进度条的时候，清除动画
mArrowImageView.clearAnimation();
}
mHintTextView.setText(R.string.xlistview_header_hint_normal);// 文字提示：下拉刷新
break;
case STATE_READY:
if (mState != STATE_READY) {
mArrowImageView.clearAnimation();
mArrowImageView.startAnimation(mRotateUpAnim);
mHintTextView.setText(R.string.xlistview_header_hint_ready);// 松开刷新数据
}
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();
}


}