我要做的是拥有一个带有按钮的回收者视图。当初始化具有回收器的布局时，它将仅具有按钮，并且一旦被点击，将添加项目（第一项）和按钮（或图像视图，无论其上具有+）被推到右侧。我有recyclerView它正在工作（通过工作我的意思是我有一些照片以正确的顺序显示），但我无法显示按钮。我发现各种链接类似于此，例如How to add fixed Button in RecyclerView Adapter?，但我无法弄清楚。
这是适配器：
public class SelectPhotoAdapter extends
RecyclerView.Adapter<SelectPhotoHolder> {// Recyclerview will extend to
// recyclerview adapter
private ArrayList<Data_Model> arrayList;
private Context context;
private boolean hasLoadButton = true;
private final int IMAGES = 0;
private final int LOAD_MORE = 1;
public SelectPhotoAdapter (Context context,
ArrayList<Data_Model> arrayList) {
this.context = context;
this.arrayList = arrayList;
}
public boolean isHasLoadButton() {
return hasLoadButton;
}
public void setHasLoadButton(boolean hasLoadButton) {
this.hasLoadButton = hasLoadButton;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
if (hasLoadButton) {
return arrayList.size() + 1;
} else {
return arrayList.size();
}
}
@Override
public int getItemViewType(int position) {
if (position < getItemCount()) {
return IMAGES;
} else {
return LOAD_MORE;
}
}
// @Override
// public int getItemCount() {
// return (null != arrayList ? arrayList.size() : 0);
//
// }
@Override
public void onBindViewHolder(SelectPhotoHolder holder, int position) {
SelectPhotoHolder mainHolder = holder;// holder
if(position >= getItemCount()) {
mainHolder.addPhoto.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
//dostuff
}
});
} else {
final Data_Model model = arrayList.get(position);
Bitmap image = BitmapFactory.decodeResource(context.getResources(),
model.getImagePath());// This will convert drawbale image into
mainHolder.imageview.setImageBitmap(image);
}
}
@Override
public SelectPhotoHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == IMAGES) {
return new SelectPhotoHolder((LayoutInflater.from(parent.getContext()).inflate(R.layout.selectphotolist, parent, false)),IMAGES);
} else if (viewType == LOAD_MORE) {
return new SelectPhotoHolder((LayoutInflater.from(parent.getContext()).inflate(R.layout.addphoto, parent, false)),LOAD_MORE);
} else {
return null;
}
}
}
如果我使用评论的getItemCount()我会收到照片，但没有按钮，如果我使用从提供的链接中取消的未注释的getItemCount()，它就会崩溃。我还没弄清楚在哪里使用isHasLoadButton()或setHasLoadButton方法。有人能指出我正确的方向吗？
如果您需要我发布任何文件，请告诉我。谢谢。
使用recyclerView的文件：
public class SelectPhotoDialogFragment extends DialogFragment {
private RecyclerView mRecyclerView;
private SelectPhotoAdapter adapter;
// this method create view for your Dialog
public static final Integer[] IMAGES= {R.drawable.first,R.drawable.second,R.drawable.third,R.drawable.picc};
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Dialog dialog = super.onCreateDialog(savedInstanceState);
// request a window without the title
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
return dialog;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//inflate layout with recycler view
View v = inflater.inflate(R.layout.select_photo, container, false);
mRecyclerView = (RecyclerView) v.findViewById(R.id.recycler_view);
int recyclerHeight = mRecyclerView.getHeight();
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false));
ArrayList<Data_Model> arrayList = new ArrayList<>();
for (int i = 0; i < IMAGES.length; i++) {
arrayList.add(new Data_Model(IMAGES[i]));
}
adapter = new SelectPhotoAdapter(getActivity(), arrayList);
mRecyclerView.setAdapter(adapter);// set adapter on recyclerview
adapter.notifyDataSetChanged();// Notify the adapter
return v;
}
}
再次解释：我唯一看到的是图像（第一，第二，第三，picc）和之后没有按钮，但它们显示正确。我想要发生的只是将按钮作为一个项目，当我点击它之前插入一个图片并向右移动（你可以看到我有一个水平方向）。这是我一直试图用2个ViewTypes做的，但我还没弄明白。
持有人：
public class SelectPhotoHolder extends RecyclerView.ViewHolder {
// View holder for gridview recycler view as we used in listview
private final int IMAGES = 0;
private final int LOAD_MORE = 1;
public ImageView imageview;
public Button addPhoto;
public SelectPhotoHolder(View view,int ViewType) {
super(view);
// Find all views ids
if(ViewType == IMAGES) {
this.imageview = (ImageView) view
.findViewById(R.id.selectPhoto);
}
else
this.addPhoto = (Button) view.findViewById(R.id.load_more);
}
}
新的持有人输出：
01-31 14:12:47.131 24072-24072/name.company.newapp E/test-exist: IMAGESfalse
01-31 14:12:47.141 24072-24072/name.company.newapp E/test-exist: IMAGESfalse
01-31 14:12:47.141 24072-24072/name.company.newapp E/test-exist: IMAGESfalse
01-31 14:12:47.151 24072-24072/name.company.newapp E/test-exist: IMAGESfalse
01-31 14:12:47.231 24072-24072/name.company.newapp E/test-exist: IMAGESfalse
答案 0 :(得分：0)
@Override
public int getItemViewType(int position) {
if (position < getItemCount()-1) {
return IMAGES;
} else {
return LOAD_MORE;
}
}
public SelectPhotoHolder(View view,int ViewType) {
super(view);
// Find all views ids
if(ViewType == IMAGES) {
this.imageview = (ImageView) view
.findViewById(R.id.selectPhoto);
Log.e("test-exist", "IMAGES" + (imageview == null));
}else{
this.addPhoto = (Button) view.findViewById(R.id.load_more);
Log.e("test-exist", "LOAD_MORE" + (addPhoto == null));
}
}
@Override
public int getItemCount() {
if (hasLoadButton) {
return arrayList==null? 1 :arrayList.size() + 1;
} else {
return arrayList==null? 0 :arrayList.size();
}
}
if(position >= (arrayList==null? 0 :arrayList.size())) {
try{
mainHolder.addPhoto.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
//dostuff
}
});
}catch(Throwable e){
Log.e("test-erorr","current position:"+position);
}
} else {
final Data_Model model = arrayList.get(position);
Bitmap image = BitmapFactory.decodeResource(context.getResources(),
model.getImagePath());// This will convert drawbale image into
mainHolder.imageview.setImageBitmap(image);
}
答案 1 :(得分：0)
这是一个样本，这就是为什么我在＆＃34;示例 - 示例＆＃34;，根据您自己的要求进行修改，此＆＃34;示例＆＃34;显示带有图像的Recyclerview项目，在recyclerview下面有一个按钮，当按下它时会添加一个新图像，你可以修改地点 - 动画，这里是Item.java：
public class Item {
private int Pic;
public Item(String Title, int Pic, int Color) {
setPic(Pic);
}
public int getPic() {
return Pic;
}
public void setPic(int photo) {
this.Pic= photo;
}
}
适配器：
public class Adapter extends RecyclerView.Adapter<RecyclerViewHolders>{
private List<Item> itemList;
public Context context;
public Adapter(Context context, List<Item> itemList) {
this.itemList = itemList;
this.context = context;
}
@Override
public RecyclerViewHolders onCreateViewHolder(ViewGroup parent, int viewType) {
View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.your_item, null);
return new RecyclerViewHolders(layoutView);
}
@Override
public void onBindViewHolder(RecyclerViewHolders holder, int position) {
holder.Pic.setImageResource(itemList.get(position).getPic());
}
@Override
public int getItemCount() {
return this.itemList.size();
}
}
现在，在MainActivity或适配器初始化
的情况下，这一切都正常Adapter rcAdapter;
public static List<Item> Items;
public static Button button;
在你的onCreate：
initListViews();
现在是initListViews方法：
public void initListViews()
{
List<Item> rowListItem = getAllItemList();
LinearLayoutManager yourlayout= new LinearLayoutManager(this);
RecyclerView RcView = (RecyclerView)findViewById(R.id.recycler_view);
button = (Button)findViewById(R.id.button);
RcView.setHasFixedSize(true);
RcView.setLayoutManager(yourlayout);
rcAdapter = new RecyclerViewAdapter(this, rowListItem);
RcView.setAdapter(rcAdapter);
}
private List<Item> getAllItemList(){
Items.add(new Item(YourImageResources));
Items.add(new Item(YourImageResources));
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AllItems.add(new Item(YourImageResources));
}
});
}
如果您想要添加特定数量的项目：
int PressedTimes = 0;
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(PressedTimes < 7)
{
AllItems.add(new Item(YourImageResources));
PressedTimes=+1;
}
if(PressedTimes == 7)
{
button.setVisibility(View.GONE);
}
}
});