无法解析构造函数';GridLayoutManager(android.support.v4.app.FragmentActivity)
当我将LinearLayoutManagar更改为GridLayoutManager时,我遇到了这个问题。 我希望列表位于网格视图而不是列表视图中。 错误出现在getActivity()中 错误:无法解析构造函数';GridLayoutManager(android.support.v4.app.FragmentActivity),android,xml,android-fragments,grid-layout,Android,Xml,Android Fragments,Grid Layout,当我将LinearLayoutManagar更改为GridLayoutManager时,我遇到了这个问题。 我希望列表位于网格视图而不是列表视图中。 错误出现在getActivity()中 错误: no suitable constructor found for GridLayoutManager(FragmentActivity) constructor GridLayoutManager.GridLayoutManager(Context,AttributeSet,int,int)
no suitable constructor found for GridLayoutManager(FragmentActivity)
constructor GridLayoutManager.GridLayoutManager(Context,AttributeSet,int,int) is not applicable
(actual and formal argument lists differ in length)
constructor GridLayoutManager.GridLayoutManager(Context,int) is not applicable
(actual and formal argument lists differ in length)
constructor GridLayoutManager.GridLayoutManager(Context,int,int,boolean) is not applicable
(actual and formal argument lists differ in length)
这是我的密码
public class FragmentBookmark extends Fragment {
View paramView;
MyAdapter adapter;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
paramView = inflater.inflate(R.layout.bookmark, container, false);
RecyclerView recyclerView = (RecyclerView) paramView.findViewById(R.id.listRecyclerView);
MyAdapter adapter = new MyAdapter();
recyclerView.setAdapter(adapter);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
return paramView;
}
}
我的适配器
public class MyAdapter extends RecyclerView.Adapter {
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.grid_item, viewGroup, false);
return new ListViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
((ListViewHolder) viewHolder).bindView(i);
}
@Override
public int getItemCount() {
return OurData.title.length;
}
private class ListViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView mItemText;
private ImageView mItemImage;
public ListViewHolder(View itemView) {
super(itemView);
mItemText = (TextView) itemView.findViewById(R.id.tv_name);
mItemImage = (ImageView) itemView.findViewById(R.id.imageview);
itemView.setOnClickListener(this);
}
public void bindView(int position) {
mItemText.setText(OurData.title[position]);
mItemImage.setImageResource(OurData.picture[position]);
}
@Override
public void onClick(View v) {
}
}
}
书签xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/listRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
网格项xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardElevation="4dp"
android:id="@+id/recyclerView">
<ImageView
android:id="@+id/imageview"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:contentDescription="@null" />
<TextView
android:id="@+id/tv_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:maxLines="1"
android:text="newText"
android:singleLine="true" />
</LinearLayout>
需要多个参数,请尝试其构造函数之一:
int num_columns = 2;
new GridLayoutManager(getActivity(), num_columns);
需要多个参数,请尝试其构造函数之一:
int num_columns = 2;
new GridLayoutManager(getActivity(), num_columns);
像这样试试
// Initializing recyclerview
RecyclerView recyclerViewItems = findViewById(R.id.rv_feeds);
//setting no of cols. orientation using GridLayoutManager
GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 2, LinearLayout.VERTICAL, false);
recyclerViewItems.setLayoutManager(gridLayoutManager);
//passing data to adapter
FeedsRecycleViewAdapter adapter = new FeedsRecycleViewAdapter(this, myImageList, myBrands, myPrice, myActPrice);
像这样试试
// Initializing recyclerview
RecyclerView recyclerViewItems = findViewById(R.id.rv_feeds);
//setting no of cols. orientation using GridLayoutManager
GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 2, LinearLayout.VERTICAL, false);
recyclerViewItems.setLayoutManager(gridLayoutManager);
//passing data to adapter
FeedsRecycleViewAdapter adapter = new FeedsRecycleViewAdapter(this, myImageList, myBrands, myPrice, myActPrice);
更改代码的这一行:
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
到
更改代码的这一行:
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
到
用下面的代码替换您的代码。您的代码失败,因为构造函数需要两个参数,
Context
->Activity Context和int
-列数
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), numberOfColumns));
用下面的代码替换您的代码。您的代码失败,因为构造函数需要两个参数,
Context
->Activity Context和int
-列数
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), numberOfColumns));
在bookmark.xml文件中添加布局管理器
xmlns:app=“http://
schemas.android.com/apk/res-auto”
app:layoutManager=“android.support.v7.widget.GridLayoutManager”
应用程序:spanCount=“2”`
从“活动”中删除setLlayoutManager在bookmark.xml文件中添加布局管理器
xmlns:app=“http://
schemas.android.com/apk/res-auto”
app:layoutManager=“android.support.v7.widget.GridLayoutManager”
应用程序:spanCount=“2”`
从“活动”中删除setLlayoutManager错误消息会告诉您问题所在。没有只接受
上下文的构造函数。您可能还检查了可用的构造函数。错误消息会告诉您问题所在。没有只接受上下文的构造函数。您可能还检查了可用的构造函数。您没有正确初始化GridLayout chk上面的引用以方便您。您没有正确初始化GridLayout chk上面的引用以方便您。您知道这么多,它工作了,但我已经接受了KaranMer的答案,因为我首先看到了他的代码。希望你能理解,非常感谢,这很有效,但我已经接受了KaranMer的答案,因为我第一次看到他的代码。希望你能理解