Android:在向下/向上滚动listview时使用动画隐藏RelativeLayout
我尝试实现一个用于隐藏listview上方的relativeLayout的动画。我希望有这样的行为:Android:在向下/向上滚动listview时使用动画隐藏RelativeLayout,android,android-layout,android-listview,android-animation,Android,Android Layout,Android Listview,Android Animation,我尝试实现一个用于隐藏listview上方的relativeLayout的动画。我希望有这样的行为: 向下滚动时:隐藏RelativeLayout 向上滚动:仅当我在顶部时显示RelativeLayout 我创建的以下代码有效,但存在两个问题: 当我向下滚动或向上滚动时,如果我在listview的顶部,则relativelayout会闪烁。我必须执行快速滚动以隐藏此爬升。=>我的代码中有一个问题,可能是listIsAtTop()函数的问题 第二个问题,我没有动画。我使用setVisivil
- 向下滚动时:隐藏RelativeLayout
- 向上滚动:仅当我在顶部时显示RelativeLayout
list = (com.app.frisbeee.account_view.CustomListView)findViewById(R.id.accountview_listview);
adapter = new Account_view_custom_adapter(Account_view_act.this, annoncesList);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
registerForContextMenu(list);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
list.showContextMenuForChild(view);
}
});
list.setOnDetectScrollListener(new OnDetectScrollListener() {
@Override
public void onUpScrolling() {
/* do something */
Log.d("INFO", "UPPPPPPPPPPP");
if (listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.VISIBLE);
}
}
@Override
public void onDownScrolling() {
/* do something */
Log.d("INFO", "DOWNNNNNNNN");
if (!listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.GONE);
}
}
});
}
private boolean listIsAtTop() {
if (list.getChildCount() == 0) {
return true;
}
return list.getFirstVisiblePosition() == 0 && (list.getChildCount() == 0 || list.getChildAt(0).getTop() == 0);
}
private boolean listIsAtTop() {
if(listView.getChildCount() == 0) return true;
return listView.getChildAt(0).getTop() == 0;
}
CustomListView用于检测上下滚动:
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AbsListView;
public class CustomListView extends android.widget.ListView {
private OnScrollListener onScrollListener;
private OnDetectScrollListener onDetectScrollListener;
public CustomListView(Context context) {
super(context);
onCreate(context, null, null);
}
public CustomListView(Context context, AttributeSet attrs) {
super(context, attrs);
onCreate(context, attrs, null);
}
public CustomListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
onCreate(context, attrs, defStyle);
}
private void onCreate(Context context, AttributeSet attrs, Integer defStyle) {
setListeners();
}
private void setListeners() {
super.setOnScrollListener(new OnScrollListener() {
private int oldTop;
private int oldFirstVisibleItem;
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (onScrollListener != null) {
onScrollListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (onScrollListener != null) {
onScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
if (onDetectScrollListener != null) {
onDetectedListScroll(view, firstVisibleItem);
}
}
private void onDetectedListScroll(AbsListView absListView, int firstVisibleItem) {
View view = absListView.getChildAt(0);
int top = (view == null) ? 0 : view.getTop();
if (firstVisibleItem == oldFirstVisibleItem) {
if (top > oldTop) {
onDetectScrollListener.onUpScrolling();
} else if (top < oldTop) {
onDetectScrollListener.onDownScrolling();
}
} else {
if (firstVisibleItem < oldFirstVisibleItem) {
onDetectScrollListener.onUpScrolling();
} else {
onDetectScrollListener.onDownScrolling();
}
}
oldTop = top;
oldFirstVisibleItem = firstVisibleItem;
}
});
}
@Override
public void setOnScrollListener(OnScrollListener onScrollListener) {
this.onScrollListener = onScrollListener;
}
public void setOnDetectScrollListener(OnDetectScrollListener onDetectScrollListener) {
this.onDetectScrollListener = onDetectScrollListener;
}
}
导入android.content.Context;
导入android.util.AttributeSet;
导入android.view.view;
导入android.widget.AbsListView;
公共类CustomListView扩展了android.widget.ListView{
私有OnScrollListener OnScrollListener;
私有OnDetectScrollListener OnDetectScrollListener;
公共CustomListView(上下文){
超级(上下文);
onCreate(上下文,null,null);
}
公共CustomListView(上下文、属性集属性){
超级(上下文,attrs);
onCreate(上下文、属性、空);
}
公共CustomListView(上下文、属性集属性、int-defStyle){
超级(上下文、属性、定义样式);
onCreate(上下文、属性、定义样式);
}
private void onCreate(上下文上下文、属性集属性、整数定义样式){
setListeners();
}
私有void setListeners(){
super.setOnScrollListener(新的OnScrollListener(){
私家车;
私有int oldFirstVisibleItem;
@凌驾
公共无效onScrollStateChanged(AbsListView视图,int scrollState){
if(onScrollListener!=null){
onScrollListener.onScrollStateChanged(视图,滚动状态);
}
}
@凌驾
public void onScroll(AbsListView视图、int firstVisibleItem、int visibleItemCount、int totalItemCount){
if(onScrollListener!=null){
onScrollListener.onScroll(视图、firstVisibleItem、visibleItemCount、totalItemCount);
}
如果(onDetectScrollListener!=null){
onDetectedListScroll(视图,firstVisibleItem);
}
}
私有void onDetectedListScroll(AblistView AblistView,int firstVisibleItem){
视图=absListView.getChildAt(0);
int top=(view==null)?0:view.getTop();
如果(firstVisibleItem==oldFirstVisibleItem){
如果(顶部>顶部){
onDetectScrollListener.onUpScrolling();
}否则如果(顶部<旧顶部){
onDetectScrollListener.onDownScrolling();
}
}否则{
if(firstVisibleItem
为listIsAtTop()函数尝试以下操作:
list = (com.app.frisbeee.account_view.CustomListView)findViewById(R.id.accountview_listview);
adapter = new Account_view_custom_adapter(Account_view_act.this, annoncesList);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
registerForContextMenu(list);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
list.showContextMenuForChild(view);
}
});
list.setOnDetectScrollListener(new OnDetectScrollListener() {
@Override
public void onUpScrolling() {
/* do something */
Log.d("INFO", "UPPPPPPPPPPP");
if (listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.VISIBLE);
}
}
@Override
public void onDownScrolling() {
/* do something */
Log.d("INFO", "DOWNNNNNNNN");
if (!listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.GONE);
}
}
});
}
private boolean listIsAtTop() {
if (list.getChildCount() == 0) {
return true;
}
return list.getFirstVisiblePosition() == 0 && (list.getChildCount() == 0 || list.getChildAt(0).getTop() == 0);
}
private boolean listIsAtTop() {
if(listView.getChildCount() == 0) return true;
return listView.getChildAt(0).getTop() == 0;
}
至于滑动动画:
list = (com.app.frisbeee.account_view.CustomListView)findViewById(R.id.accountview_listview);
adapter = new Account_view_custom_adapter(Account_view_act.this, annoncesList);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
registerForContextMenu(list);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
list.showContextMenuForChild(view);
}
});
list.setOnDetectScrollListener(new OnDetectScrollListener() {
@Override
public void onUpScrolling() {
/* do something */
Log.d("INFO", "UPPPPPPPPPPP");
if (listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.VISIBLE);
}
}
@Override
public void onDownScrolling() {
/* do something */
Log.d("INFO", "DOWNNNNNNNN");
if (!listIsAtTop()) {
RelativeLayout relative1 = (RelativeLayout) findViewById(R.id.relative1);
relative1.setVisibility(View.GONE);
}
}
});
}
private boolean listIsAtTop() {
if (list.getChildCount() == 0) {
return true;
}
return list.getFirstVisiblePosition() == 0 && (list.getChildCount() == 0 || list.getChildAt(0).getTop() == 0);
}
private boolean listIsAtTop() {
if(listView.getChildCount() == 0) return true;
return listView.getChildAt(0).getTop() == 0;
}
slide_down.xml的代码:
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromXDelta="0" android:fromYDelta="-1000" android:duration="1500"/>
</set>
然后只需将其连接到您的亲属邮箱:
relative1.startAnimation(slideUp);
希望这能有所帮助:)一旦你做到这一点,请告诉我。我也需要同样的。在过去,我通过更改
布局权重
实现了同样的效果,但非常粗糙。谢谢。它不太好用。我必须放这行:relative1.startAnimation(slideUp)代码>我试着把它放在setVisibility之前。。你试过你的代码了吗?你把那一行放在任何你想让你的动画执行的地方。是的,我试过这个代码,我一直在使用动画:P动画不工作吗?当你运行它时发生了什么?我用你的代码更新了我的代码,并制作了一段关于这个问题的视频。我希望你能更清楚地理解我为什么会有眨眼的问题。。。这是链接:我明白了。是否仅将动画应用于淡粉色部分?或者你也将其应用于深平和灰色条上?只有相对浅粉色条。其目的是在滚动期间继续以深粉色显示relativeLayout