我有一个RecyclerView,当点击RecyclerView项目时,想要打开一个包含另一个RecyclerView的弹出窗口.它几乎完成了,但在弹出窗口中,没有出现cardviews.我无法弄清楚为什么,任何人都能帮忙吗？
1-我的主RecyclerView适配器
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private ArrayList<Mission> mDataset;
private Context mContext;
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<Mission> myDataset, Context context) {
mDataset = myDataset;
this.mContext = context;
}
// Create new views (invoked by the layout manager)
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view
View v = LayoutInflater.from(mContext)
.inflate(R.layout.mission_card_item, parent, false);
// set the view's size, margins, paddings and layout parameters
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.mTextView.setText(mDataset.get(position).getName());
holder.mPuanView.setText(mDataset.get(position).getPoint());
holder.mRankView.setText(mDataset.get(position).getRank());
holder.btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext,"Buton Clicked", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return mDataset.size();
}
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public class MyViewHolder extends RecyclerView.ViewHolder {
public CardView mCardView;
public TextView mTextView;
public TextView mPuanView;
public TextView mRankView;
public Button btnAdd;
public MyViewHolder(final View itemView) {
super(itemView);
mCardView = (CardView) itemView.findViewById(R.id.card_view);
mTextView = (TextView) itemView.findViewById(R.id.tv_text);
mRankView = (TextView) itemView.findViewById(R.id.tv_rank);
mPuanView = (TextView) itemView.findViewById(R.id.tv_puan);
btnAdd = (Button) itemView.findViewById(R.id.button_add);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopup();
Toast.makeText(itemView.getContext(),"Element " + getAdapterPosition() + " clicked", Toast.LENGTH_SHORT).show();
Log.d("hello", "Element " + getAdapterPosition() + " clicked.");
}
});
}
}
public void showPopup(){
final View popupView = LayoutInflater.from(mContext).inflate(R.layout.recycler_popup_window, null);
final PopupWindow popupWindow = new PopupWindow(popupView, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT);
Button btn = (Button) popupView.findViewById(R.id.button);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
popupWindow.dismiss();
}
});
RecyclerView recyclerView = (RecyclerView) popupView.findViewById(R.id.rv_recycler_view);
ArrayList<String> data = new ArrayList<>();
data.add("my data");
data.add("my test data");
PopupRecyclerViewAdapter adapter = new PopupRecyclerViewAdapter(mContext,data);
recyclerView.setAdapter(adapter);
popupWindow.showAtLocation(popupView,Gravity.CENTER, 0, 0);
}
}
2-我的第二个RecyclerView适配器,用于弹出窗口
public class PopupRecyclerViewAdapter extends RecyclerView.Adapter<PopupRecyclerViewAdapter.MyViewHolder>{
private Context mContext;
private ArrayList<String> data;
public PopupRecyclerViewAdapter(Context mContext, ArrayList<String> data) {
this.mContext = mContext;
this.data = data;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(mContext).inflate(R.layout.recycler_popup_card_item, parent,false);
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.mTextView.setText(data.get(position));
}
@Override
public int getItemCount() {
return data.size();
}
//View Holder
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
public MyViewHolder(View itemView) {
super(itemView);
mTextView = (TextView) itemView.findViewById(R.id.tv_text2);
}
}
}
3- Recycler弹出窗口的布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_recycler_view2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/button"
android:background="#ff4545">
</android.support.v7.widget.RecyclerView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Close"
android:id="@+id/button"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
4-用于弹出RecyclerView的CardView布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_margin="10dp"
android:layout_height="wrap_content"
card_view:cardCornerRadius="4dp"
card_view:elevation="14dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<ImageView
android:layout_width="match_parent"
android:layout_height="175dp"
android:id="@+id/imageView2"
android:src="@mipmap/testimage"
android:layout_marginBottom="10dp"
android:scaleType="centerCrop"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tv_text2"
android:text="Blah blah blah..."
android:gravity="center"
android:layout_marginBottom="10dp"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
解决方法:
在recyclerview弹出窗口中添加以下行：
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyler_view.setLayoutManager(mLayoutManager);