Android使用PullToRefresh完成ListView下拉刷新和左滑删除功能

* Created by caobo on 2016/11/1 0001.
* ListView下拉刷新、上拉加载更多
*/
public class ListViewActivity extends Activity implements PullToRefreshBase.OnRefreshListener<ListView> {
private PullToRefreshListView refreshlistview;
private ListView mListView;
//添加数据List集合
//TODO：这里使用了LinkedList方便Demo中添加数据使用，实际项目中使用ArrayList即可。
private LinkedList<String> pullData;
private ListAdapter adapter;
//标记下拉index
private int pullDownIndex = 0;
//标记上拉index
private int pullUpIndex = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listview);
pullData = new LinkedList<>();
refreshlistview = (PullToRefreshListView) findViewById(R.id.refreshlistview);
refreshlistview.setPullLoadEnabled(false);
refreshlistview.setScrollLoadEnabled(true);
refreshlistview.setOnRefreshListener(this);
mListView = refreshlistview.getRefreshableView();
adapter = new ListAdapter(getData());
mListView.setAdapter(adapter);
refreshlistview.onRefreshComplete();
}
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
onPullDown();
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
onPullUp();
}
/**
* 预加载初始化数据List
* @return
*/
public List<String> getData() {
for (int i = 1; i <= 20; i++) {
pullData.add("默认ListView数据" + i);
}
return pullData;
}
/**
* 下拉刷新添加数据到List集合
*/
public void onPullDown() {
pullData.addFirst("下拉刷新数据" + pullDownIndex);
pullDownIndex++;
refreshlistview.onRefreshComplete();
adapter.notifyDataSetChanged();
}
/**
* 上拉加载添加数据到List集合
*/
public void onPullUp() {
pullData.addLast("上拉加载数据" + pullUpIndex);
pullUpIndex++;
refreshlistview.onRefreshComplete();
adapter.notifyDataSetChanged();
}
public void onBackClick(View view){
finish();
}
}

<?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.jaynm.pulltorefreshscrollviewdemo.refresh.PullToRefreshListView
android:background="#000"
android:id="@+id/refreshlistview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="@android:color/transparent"
android:divider="@color/consumer_bg"
android:dividerHeight="1px"
android:fadingEdge="none"
android:orientation="vertical"
android:overScrollMode="never"
android:requiresFadingEdge="none">
</com.jaynm.pulltorefreshscrollviewdemo.refresh.PullToRefreshListView>
</LinearLayout>

@Override
public boolean onTouchEvent(MotionEvent ev) {
if (ev.getAction() != MotionEvent.ACTION_DOWN && mTouchView == null)
return super.onTouchEvent(ev);
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
int oldPos = mTouchPosition;
mDownX = ev.getX();
mDownY = ev.getY();
mTouchState = TOUCH_STATE_NONE;
mTouchPosition = pointToPosition((int) ev.getX(), (int) ev.getY());
if (mTouchPosition == oldPos && mTouchView != null
&& mTouchView.isOpen()) {
mTouchState = TOUCH_STATE_X;
mTouchView.onSwipe(ev);
return true;
}
View view = getChildAt(mTouchPosition - getFirstVisiblePosition());
if (mTouchView != null && mTouchView.isOpen()) {
mTouchView.smoothCloseMenu();
mTouchView = null;
// return super.onTouchEvent(ev);
// try to cancel the touch event
MotionEvent cancelEvent = MotionEvent.obtain(ev);
cancelEvent.setAction(MotionEvent.ACTION_CANCEL);
onTouchEvent(cancelEvent);
if (mOnMenuStateChangeListener != null) {
mOnMenuStateChangeListener.onMenuClose(oldPos);
}
return true;
}
if (view instanceof SwipeMenuLayout) {
mTouchView = (SwipeMenuLayout) view;
mTouchView.setSwipeDirection(mDirection);
}
if (mTouchView != null) {
mTouchView.onSwipe(ev);
}
break;
case MotionEvent.ACTION_MOVE:
//有些可能有header,要减去header再判断
mTouchPosition = pointToPosition((int) ev.getX(), (int) ev.getY()) - getHeaderViewsCount();
//如果滑动了一下没完全展现，就收回去，这时候mTouchView已经赋值，再滑动另外一个不可以swip的view
//会导致mTouchView swip 。 所以要用位置判断是否滑动的是一个view
if (!mTouchView.getSwipEnable() || mTouchPosition != mTouchView.getPosition()) {
break;
}
float dy = Math.abs((ev.getY() - mDownY));
float dx = Math.abs((ev.getX() - mDownX));
if (mTouchState == TOUCH_STATE_X) {
if (mTouchView != null) {
mTouchView.onSwipe(ev);
}
getSelector().setState(new int[]{0});
ev.setAction(MotionEvent.ACTION_CANCEL);
super.onTouchEvent(ev);
return true;
} else if (mTouchState == TOUCH_STATE_NONE) {
if (Math.abs(dy) > MAX_Y) {
mTouchState = TOUCH_STATE_Y;
} else if (dx > MAX_X) {
mTouchState = TOUCH_STATE_X;
if (mOnSwipeListener != null) {
mOnSwipeListener.onSwipeStart(mTouchPosition);
}
}
}
break;
case MotionEvent.ACTION_UP:
if (mTouchState == TOUCH_STATE_X) {
if (mTouchView != null) {
boolean isBeforeOpen = mTouchView.isOpen();
mTouchView.onSwipe(ev);
boolean isAfterOpen = mTouchView.isOpen();
if (isBeforeOpen != isAfterOpen && mOnMenuStateChangeListener != null) {
if (isAfterOpen) {
mOnMenuStateChangeListener.onMenuOpen(mTouchPosition);
} else {
mOnMenuStateChangeListener.onMenuClose(mTouchPosition);
}
}
if (!isAfterOpen) {
mTouchPosition = -1;
mTouchView = null;
}
}
if (mOnSwipeListener != null) {
mOnSwipeListener.onSwipeEnd(mTouchPosition);
}
ev.setAction(MotionEvent.ACTION_CANCEL);
super.onTouchEvent(ev);
return true;
}
break;
}
return super.onTouchEvent(ev);
}

// 操作ListView左滑时的手势操作，这里用于处理上下左右滑动冲突：开始滑动时则禁止下拉刷新和上拉加载手势操作，结束滑动后恢复上下拉操作
swipeMenuListView.setOnSwipeListener(new SwipeMenuListView.OnSwipeListener() {
@Override
public void onSwipeStart(int position) {
refreshlistview.setPullRefreshEnabled(false);
}
@Override
public void onSwipeEnd(int position) {
refreshlistview.setPullRefreshEnabled(true);
}
});

@ public boolean onInterceptTouchEvent(MotionEvent ev) {
//在拦截处处理，在滑动设置了点击事件的地方也能swip，点击时又不能影响原来的点击事件
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
mDownX = ev.getX();
mDownY = ev.getY();
boolean handled = super.onInterceptTouchEvent(ev);
mTouchState = TOUCH_STATE_NONE;
mTouchPosition = pointToPosition((int) ev.getX(), (int) ev.getY());
View view = getChildAt(mTouchPosition - getFirstVisiblePosition());
//只在空的时候赋值 以免每次触摸都赋值，会有多个open状态
if (view instanceof SwipeMenuLayout) {
//如果有打开了 就拦截.
if (mTouchView != null && mTouchView.isOpen() && !inRangeOfView(mTouchView.getMenuView(), ev)) {
return true;
}
mTouchView = (SwipeMenuLayout) view;
mTouchView.setSwipeDirection(mDirection);
}
//如果摸在另外个view
if (mTouchView != null && mTouchView.isOpen() && view != mTouchView) {
handled = true;
}
if (mTouchView != null) {
mTouchView.onSwipe(ev);
}
return handled;
case MotionEvent.ACTION_MOVE:
float dy = Math.abs((ev.getY() - mDownY));
float dx = Math.abs((ev.getX() - mDownX));
if (Math.abs(dy) > MAX_Y || Math.abs(dx) > MAX_X) {
//每次拦截的down都把触摸状态设置成了TOUCH_STATE_NONE 只有返回true才会走onTouchEvent 所以写在这里就够了
if (mTouchState == TOUCH_STATE_NONE) {
if (Math.abs(dy) > MAX_Y) {
mTouchState = TOUCH_STATE_Y;
} else if (dx > MAX_X) {
mTouchState = TOUCH_STATE_X;
if (mOnSwipeListener != null) {
mOnSwipeListener.onSwipeStart(mTouchPosition);
}
}
}
return true;
}
}
return super.onInterceptTouchEvent(ev);
}

// 创建左滑弹出的item
SwipeMenuCreator creator = new SwipeMenuCreator() {
@Override
public void create(SwipeMenu menu) {
// 创建Item
SwipeMenuItem openItem = new SwipeMenuItem(getApplicationContext());
// 设置item的背景颜色
openItem.setBackground(new ColorDrawable(Color.RED));
// 设置item的宽度
openItem.setWidth(Utils.dip2px(SwipeListViewActivity.this,90));
// 设置item标题
openItem.setTitle("删除");
// 设置item字号
openItem.setTitleSize(18);
// 设置item字体颜色
openItem.setTitleColor(Color.WHITE);
// 添加到ListView的Item布局当中
menu.addMenuItem(openItem);
}
};
// set creator
swipeMenuListView.setMenuCreator(creator);
// 操作删除按钮的点击事件
swipeMenuListView.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(final int position, SwipeMenu menu, int index) {
Toast.makeText(SwipeListViewActivity.this,"删除"+pullData.get(position),Toast.LENGTH_LONG).show();
return false;
}
});
// 操作ListView左滑时的手势操作，这里用于处理上下左右滑动冲突：开始滑动时则禁止下拉刷新和上拉加载手势操作，结束滑动后恢复上下拉操作
swipeMenuListView.setOnSwipeListener(new SwipeMenuListView.OnSwipeListener() {
@Override
public void onSwipeStart(int position) {
refreshlistview.setPullRefreshEnabled(false);
}
@Override
public void onSwipeEnd(int position) {
refreshlistview.setPullRefreshEnabled(true);
}
});
}