我正在使用recyclerView，我成功地膨胀了两个视图，但每个视图内容都来自不同的json数据类型。我尝试在适配器中传递两种数据类型，但它们没有正确绑定
源代码
public class SimpleStringRecyclerViewAdapter：RecyclerView.Adapter {
private Article[] mValues;
private List<YouTubeItem> mValues2;
Context context;
public SimpleStringRecyclerViewAdapter(Context context, Article[] items, List<YouTubeItem> item )
{
this.context = context;
mValues = items;
mValues2 = item;
}
public override int ItemCount
{
get
{
return mValues.Count() + mValues2.Count();
}
}
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
if (holder is SimpleViewHolder)
try
{
Article item = mValues[position];
var simpleHolder = holder as SimpleViewHolder;
simpleHolder.mTxtView.Text = Android.Text.Html.FromHtml(item.Title).ToString();
simpleHolder.mTxtView2.Text = item.Description;
using (var imageView = simpleHolder.mImageView)
{
string url = Android.Text.Html.FromHtml(item.UrlToImage).ToString();
//Download and display image
UrlImageViewHelper.SetUrlDrawable(imageView,
url, Resource.Drawable.cheese_1
);
}
// simpleHolder.mprogressbar.Visibility = ViewStates.Gone;
}
catch (Exception e)
{
//Toast.MakeText(this.context, e.ToString(), ToastLength.Long).Show();
}
else
{
try
{
YouTubeItem item = mValues2[position];
var simpleHolder = holder as SimpleViewHolder2;
simpleHolder.mTxtView.Text = Android.Text.Html.FromHtml(item.Title).ToString();
// simpleHolder.mTxtView2.Text = item.DescriptionShort;
using (var imageView = simpleHolder.mImageView)
{
string url = Android.Text.Html.FromHtml(item.MaxResThumbnailUrl).ToString();
//Download and display image
UrlImageViewHelper.SetUrlDrawable(imageView,
url, Resource.Drawable.cheese_1
);
}
}
catch (Exception e)
{
//Toast.MakeText(this.context, e.ToString(), ToastLength.Long).Show();
}
}
}
public override int GetItemViewType(int position)
{
if ((position % 2) == 0)
{
//Even number
return Resource.Layout.List_Item;
}
else
{
//Odd number
return Resource.Layout.VideoList;
}
}
public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
{
if (viewType == Resource.Layout.List_Item)
{
View view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.List_Item, parent, false);
view.SetBackgroundColor(Color.White);
SimpleViewHolder holder = new SimpleViewHolder(view);
// holder.mprogressbar = view.FindViewById<ProgressBar>(Resource.Id.progressBar);
// holder.mprogressbar.Visibility = ViewStates.Visible;
//Showing loading progressbar
return holder;
}
else
{
View view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.VideoList, parent, false);
view.SetBackgroundColor(Color.White);
SimpleViewHolder2 holder = new SimpleViewHolder2(view);
return holder;
}
}
}
公共类SimpleViewHolder：RecyclerView.ViewHolder { public string mBoundString; public readonly查看mView; public readonly ImageView mImageView; public readonly TextView mTxtView; public readonly TextView mTxtView2; // public ProgressBar mprogressbar;
public SimpleViewHolder(View view) : base(view)
{
mView = view;
mImageView = view.FindViewById<ImageView>(Resource.Id.avatar);
mTxtView = view.FindViewById<TextView>(Resource.Id.Text1);
mTxtView2 = view.FindViewById<TextView>(Resource.Id.Text2);
// mprogressbar = view.FindViewById<ProgressBar>(Resource.Id.progressBar);
}
public override string ToString()
{
return base.ToString() + " '" + mTxtView.Text;
}
} 公共类SimpleViewHolder2：RecyclerView.ViewHolder { public string mBoundString; public readonly查看mView; public readonly ImageView mImageView; public readonly TextView mTxtView; public readonly TextView mTxtView2;
public SimpleViewHolder2(View view) : base(view)
{
mView = view;
mImageView = view.FindViewById<ImageView>(Resource.Id.videoavatar);
mTxtView = view.FindViewById<TextView>(Resource.Id.videoText1);
// mprogressbar = view.FindViewById<ProgressBar>(Resource.Id.progressBar);
}
答案 0 :(得分：6)
您应该仅将数据合并到一个数据源。你可以这样试试：
创建数据源类
csvfilenames <- list.files("/Users/carlos/Desktop/TestCSVFilesToMerge/",
pattern="*.csv", all.files=FALSE, full.names=FALSE) #creates a list with the file names
csvfilenames
for(i in 1:length(csvfilenames))
{
a=csvfilenames[i]
temp1<-read.csv(file=paste("/Users/carlos/Desktop/TestCSVFilesToMerge/",a,sep=""), sep=";", header=T)
temp2<-cbind("FileName"=a,temp1[,1:ncol(temp1)]) #add a column called FileName in position 1
temp[a]=temp2
}
output=rbind(temp[[a]])
output
现在将两个数据源合并为一个
public class Data {
int type; // 1 is article and 2 is youtubeitem
public Article article;
public YouTubeItem youTubeItem;
}
更改适配器的构造函数
public List<Data> merge(Articel[] articles, List<YouTubeItem> items) {
List<Data> datas = new ArrayList<>();
for(Article article : articles) {
Data data = new Data();
data.article = article;
data.youTubeItem = null;
data.type = 1;
datas.add(data);
}
for(YouTubeItem item : items) {
Data data = new Data();
data.article = null;
data.youTubeItem = item;
data.type = 2;
datas.add(data);
}
return datas;
}
更改获取项目计数
private List<Data> datas;
public SimpleStringRecyclerViewAdapter(Context context, List<Data> datas )
{
this.datas = datas;
}
更改getViewType
public override int ItemCount
{
get
{
return datas.Count();
}
}
已编辑：适用于合并随机方法
public override int GetItemViewType(int position)
{
if (datas.get(position).type == 1)
{
return Resource.Layout.List_Item;
}
else
{
return Resource.Layout.VideoList;
}
}
用于合并奇数和偶数方法
public List<Data> mergeRandom(Articel[] articles, List<YouTubeItem> items) {
List<Data> datas = new ArrayList<>();
List<Integer> random = new ArrayList<>();
int maxLength = articles.length + items.size();
for(int i = 0; i< maxLength; i++) {
random.add(i);
}
while (random.size() > 0) {
// get random item
int index = new Random().nextInt(random.size());
int position = random.get(index);
if(position <= article.length - 1) {
Data data = new Data();
data.article = articles[position];
data.youTubeItem = null;
data.type = 1;
datas.add(data);
} else {
Data data = new Data();
data.article = null;
data.youTubeItem = items.get(position - article.length);
data.type = 2;
datas.add(data);
}
random.remove(index);
}
return datas;
}
希望有所帮助
答案 1 :(得分：0)
让一个interface实现您的数据pojo类，如下所示..
public interface Parent{
}
然后pojo类喜欢
public class User implements Parent{
private String name,addres;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddres() {
return addres;
}
public void setAddres(String addres) {
this.addres = addres;
}
}
然后将所有数据添加到父列表中并绑定到适配器中。 适配器根据pojo类绑定数据，如下所示..
public class SearchListAdapter extends ArrayAdapter<Parent> {
Context context;
Parent parent[] = null;
public SearchListAdapter(Context context, int layoutResourceId, Parent[] parent) {
super(context, layoutResourceId, parent);
this.context = context;
this.parent = parent;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final LayoutInflater inflater = ((Activity) context).getLayoutInflater();
final View outerContainer = inflater.inflate(R.layout.food_list_item, parent, false);
if (this.parent != null) {
Parent temp = this.parent[position];
if (temp instanceof FoodItem) {
final FoodItem item = (FoodItem) temp;
}
}
}
}
答案 2 :(得分：0)
使用此函数合并数据并在适配器中使用它：
SELECT * FROM Sites WHERE SiteId = 59;