https://github.com/etsy/AndroidStaggeredGrid 用的github上面提供瀑布流，继承于abslistview，回收机制不错，并且提供了OnScrollListener来监听滑动时间。
Java代码：
package com.xxx.waterfall; import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.View; import com.handmark.pulltorefresh.library.OverscrollHelper;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.R; public class PullToRefreshStaggeredGridView extends PullToRefreshBase<StaggeredGridView> { private static final OnRefreshListener<StaggeredGridView> defaultOnRefreshListener = new OnRefreshListener<StaggeredGridView>() { @Override
public void onRefresh(PullToRefreshBase<StaggeredGridView> refreshView) { } }; public PullToRefreshStaggeredGridView(Context context) {
super(context); /**
* Added so that by default, Pull-to-Refresh refreshes the page
*/
setOnRefreshListener(defaultOnRefreshListener);
} public PullToRefreshStaggeredGridView(Context context, AttributeSet attrs) {
super(context, attrs); /**
* Added so that by default, Pull-to-Refresh refreshes the page
*/
setOnRefreshListener(defaultOnRefreshListener);
} public PullToRefreshStaggeredGridView(Context context, Mode mode) {
super(context, mode); /**
* Added so that by default, Pull-to-Refresh refreshes the page
*/
setOnRefreshListener(defaultOnRefreshListener);
} public PullToRefreshStaggeredGridView(Context context, Mode mode, AnimationStyle style) {
super(context, mode, style); /**
* Added so that by default, Pull-to-Refresh refreshes the page
*/
setOnRefreshListener(defaultOnRefreshListener);
} @Override
public final Orientation getPullToRefreshScrollDirection() {
return Orientation.VERTICAL;
} @Override
protected StaggeredGridView createRefreshableView(Context context, AttributeSet attrs) {
StaggeredGridView gridView; if (VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD) {
gridView = new InternalStaggeredGridViewSDK9(context, attrs);
} else {
gridView = new StaggeredGridView(context, attrs);
} gridView.setId(R.id.gridview);
return gridView;
} @Override
protected boolean isReadyForPullStart() {
boolean result = false;
View v = getRefreshableView().getChildAt(0);
if (getRefreshableView().getFirstVisiblePosition() == 0) {
if (v != null) {
// getTop() and getBottom() are relative to the ListView,
// so if getTop() is negative, it is not fully visible
boolean isTopFullyVisible = v.getTop() >= 0; result = isTopFullyVisible;
}
}
return result;
} @Override
protected boolean isReadyForPullEnd() {
boolean result = false;
int last = getRefreshableView().getChildCount() - 1;
View v = getRefreshableView().getChildAt(last); int firstVisiblePosition = getRefreshableView().getFirstVisiblePosition();
int visibleItemCount = getRefreshableView().getChildCount();
int itemCount = getRefreshableView().getAdapter().getCount();
if (firstVisiblePosition + visibleItemCount >= itemCount) {
if (v != null) {
boolean isLastFullyVisible = v.getBottom() <= getRefreshableView().getHeight(); result = isLastFullyVisible;
}
}
return result;
} @Override
protected void onPtrRestoreInstanceState(Bundle savedInstanceState) {
super.onPtrRestoreInstanceState(savedInstanceState);
} @Override
protected void onPtrSaveInstanceState(Bundle saveState) {
super.onPtrSaveInstanceState(saveState);
} @TargetApi(9)
final class InternalStaggeredGridViewSDK9 extends StaggeredGridView {
// WebView doesn't always scroll back to it's edge so we add some
// fuzziness
static final int OVERSCROLL_FUZZY_THRESHOLD = 2; // WebView seems quite reluctant to overscroll so we use the scale
// factor to scale it's value
static final float OVERSCROLL_SCALE_FACTOR = 1.5f; public InternalStaggeredGridViewSDK9(Context context, AttributeSet attrs) {
super(context, attrs);
} @Override
protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) { final boolean returnValue = super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);
// Does all of the hard work...
OverscrollHelper.overScrollBy(PullToRefreshStaggeredGridView.this, deltaX, scrollX, deltaY, getScrollRange(), isTouchEvent); return returnValue;
} /**
* Taken from the AOSP ScrollView source
*/
private int getScrollRange() {
int scrollRange = 0;
if (getChildCount() > 0) {
View child = getChildAt(0);
scrollRange = Math.max(0, child.getHeight() - (getHeight() - getPaddingBottom() - getPaddingTop()));
}
return scrollRange;
} }
}
XML代码：
<com.xxx.waterfall.PullToRefreshStaggeredGridView
android:id="@+id/HomePullToRefreshStaggerdGridView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@null"
android:cacheColorHint="#00000000"
android:fadingEdge="none"
android:overScrollMode="never"
android:scrollbars="none"
app:column_count="2"
app:item_margin="2dp"
ptr:ptrMode="both" >
</com.xxx.waterfall.PullToRefreshStaggeredGridView>
Java Activity:
package com.xxx.activity; import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2; public class HomeFragment extends DFFragment implements OnRefreshListener<StaggeredGridView>, AbsListView.OnScrollListener { /**下来刷新**/
private PullToRefreshStaggeredGridView mPullToRefreshStaggerdGridView;
private StaggeredGridView gv private void initView() {
mPullToRefreshStaggerdGridView = (PullToRefreshStaggeredGridView) parentView.findViewById(R.id.HomePullToRefreshStaggerdGridView); mPullToRefreshStaggerdGridView.setMode(Mode.PULL_FROM_END);
mPullToRefreshStaggerdGridView.setOnRefreshListener(new OnRefreshListener<StaggeredGridView>() { @Override
public void onRefresh(PullToRefreshBase<StaggeredGridView> refreshView) {
//刷新
}
});mPullToRefreshStaggerdGridView.setMode(Mode.BOTH);
mPullToRefreshStaggerdGridView.setOnRefreshListener(listener);
gv=mPullToRefreshStaggerdGridView.getRefreshableView();
Gv.setAdapter(waterfallAdapter);
Gv.setOnScrollListener(this);
} @Override
public void onScrollStateChanged(final AbsListView view, final int scrollState) {
} @Override
public void onScroll(final AbsListView view, final int firstVisibleItem, final int visibleItemCount, final int totalItemCount) {
if (!mHasRequestedMore) {
int lastInScreen = firstVisibleItem + visibleItemCount;
if (lastInScreen >= totalItemCount) {
//加载事件
onLoadMoreItems();
}
}
} private boolean mHasRequestedMore; private void onLoadMoreItems() {
//加载事件。。。
mHasRequestedMore = false;
} }
然后就可以用了，是不是很爽~~