Java 如何在RecyclerView中使用一些ListView方法?
我用于显示和排序级别。因为ListView的速度很慢,所以我没有使用ListView和RecyclerViewJava 如何在RecyclerView中使用一些ListView方法?,java,android,android-listview,Java,Android,Android Listview,我用于显示和排序级别。因为ListView的速度很慢,所以我没有使用ListView和RecyclerView 因此,我需要一些ListView方法,这些方法有setCrollPosition和SetOnItemSelect 我的RecyclerView适配器代码: public class levels_card_adapter extends RecyclerView.Adapter<levels_card_adapter.ViewHolder> { private st
因此,我需要一些
ListView
方法,这些方法有setCrollPosition
和SetOnItemSelect
我的RecyclerView适配器代码:
public class levels_card_adapter extends
RecyclerView.Adapter<levels_card_adapter.ViewHolder> {
private static String[] adapter_levels_number;
public levels_card_adapter(String[] adapter_levels_num_data) {
adapter_levels_number = adapter_levels_num_data;
}
@Override
public levels_card_adapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
R.layout.levels_recycler_layout, null);
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
viewHolder.adapter_levels_text.setText(adapter_levels_number[position].toString());
viewHolder.adapter_levels_version = adapter_levels_number[position];
}
@Override
public int getItemCount() {
return adapter_levels_number.length;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView adapter_levels_text;
public String adapter_levels_version;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
adapter_levels_text = (TextView) itemLayoutView
.findViewById(R.id.level_thumnail_text);
itemLayoutView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent question_page_intent = new Intent(v.getContext(), com.tellfa.braingame.activities.question_Page.class);
v.getContext().startActivity(question_page_intent);
}
});
}
}
我如何制作此方法?这对我来说非常重要和呢 公共void setScrollX(int值) 设置视图的水平滚动位置 RecyclerView.OnItemTouchListener OnItemTouchListener允许应用程序拦截触摸 RecyclerView的视图层次结构级别上正在进行的事件 在这些触摸事件被考虑用于RecyclerView之前 滚动行为
我已经实现了类似的东西,使用RecyclerView滚动的唯一方法是手动计算位置并使用您正在使用的LayoutManager滚动 我在适配器中使用了以下两种方法来实现这一点,如果您发现这有助于您更好地使用它:
public void scrollToPosition(int positionToScrollTo) {
LinearLayoutManager layoutManager = null;
try {
layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
} catch (ClassCastException e) {
log.d("You should pass a recyclerview with a layoutmanayer" +
"that inherits from LinearLayoutManager");
return;
}
int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
View firstVisibleItemView = layoutManager.findViewByPosition(firstVisibleItemPosition);
int firstViewHeight = firstVisibleItemView.getHeight();
int scrollOffsetVertical = firstViewHeight * positionToScrollTo;
mRecyclerView.scrollBy(0, scrollOffsetVertical);
}
public void smoothScrollToPosition(int positionToSCroll) {
for (int i = 0;i < positionToSCroll; i++) {
scrollToPosition(i);
}
}
public void scrollToPosition(intpositiontoScrollTo){
LinearLayoutManager布局管理器=空;
试一试{
layoutManager=(LinearLayoutManager)mRecyclerView.getLayoutManager();
}catch(ClassCastException e){
log.d(“您应该通过带有layoutmanayer的recyclerview”+
“从LinearLayoutManager继承的”);
返回;
}
int firstVisibleItemPosition=layoutManager.findFirstVisibleItemPosition();
View firstVisibleItemView=layoutManager.findViewByPosition(firstVisibleItemPosition);
int firstViewHeight=firstVisibleItemView.getHeight();
int scrollOffsetVertical=第一视图高度*位置到滚动;
mRecyclerView.scrollBy(0,scrollOffsetVertical);
}
公共位置(内部位置到滚动){
对于(int i=0;i
应该有更好的方法,但这对我很有效,希望能有所帮助,祝你好运…谢谢你,亲爱的朋友。你能把上面的语句与我的代码协调起来并给我吗?它们应该可以工作,只要在你的RecyclerAdapter中创建一个名为mRecyclerView的RecyclerView实例,并将这些方法放在你的RecyclerAdapter中,然后测试这些方法。。。
public void scrollToPosition(int positionToScrollTo) {
LinearLayoutManager layoutManager = null;
try {
layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
} catch (ClassCastException e) {
log.d("You should pass a recyclerview with a layoutmanayer" +
"that inherits from LinearLayoutManager");
return;
}
int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
View firstVisibleItemView = layoutManager.findViewByPosition(firstVisibleItemPosition);
int firstViewHeight = firstVisibleItemView.getHeight();
int scrollOffsetVertical = firstViewHeight * positionToScrollTo;
mRecyclerView.scrollBy(0, scrollOffsetVertical);
}
public void smoothScrollToPosition(int positionToSCroll) {
for (int i = 0;i < positionToSCroll; i++) {
scrollToPosition(i);
}
}