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私は初めてRecyclerViewで作業していますが、問題があります。 View iをDrawerFragmentにしようとしています。引き出しメニューは正常に動作していますが、そこにはRecyclerViewが表示されません。誰でも助けてくれますか?空になるRecyclerView
これは私のフラグメントのレイアウトです:
ここ<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#DADADA"
tools:context="com.example.entwicklung1.designtestapp.NavigationDrawerFragment"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/linid"
android:layout_width="match_parent"
android:layout_height="120dp"
android:background="#0064a7"
android:paddingLeft="20dp">
<ImageView
android:layout_width="240dp"
android:layout_height="120dp"
android:elevation="20dp"
android:gravity="center_vertical"
android:src="@drawable/zanderlogo" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/drawerList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
></android.support.v7.widget.RecyclerView>
</LinearLayout>
コード:
public class NavigationDrawerFragment extends Fragment {
private RecyclerView recyclerView;
public static final String PREF_FILE_NAME = "testpref";
public static final String KEY_USER_LEARNED_DRAWNER = "user_learned_drawer";
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private MyAdapter adapter;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
private View containerView;
public NavigationDrawerFragment() {
// Required empty public constructor
}
public List<Information> getData(){
List<Information> data = new ArrayList<>();
int[] icons={R.drawable.ic_number1,R.drawable.ic_number2,R.drawable.ic_number3,R.drawable.ic_number4,R.drawable.ic_number5};
String[] titles ={"News", "Produkte","Homepage","Kontakt","Anfahrt"};
for(int i=0;i<titles.length; i++){
Information current=new Information();
current.iconId=icons[i];
current.title=titles[i];
data.add(current);
}
return data;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer = Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWNER, "false"));
mFromSavedInstanceState = savedInstanceState != null ? true : false;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View layout=inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView=(RecyclerView)layout.findViewById(R.id.drawerList);
adapter = new MyAdapter(getActivity(),getData());
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(adapter);
return layout;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView=getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(),
drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if(!mUserLearnedDrawer){
mUserLearnedDrawer=true;
saveToPreferences(getActivity(),KEY_USER_LEARNED_DRAWNER,mUserLearnedDrawer+"");
}
getActivity().supportInvalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().supportInvalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
if(!mUserLearnedDrawer && !mFromSavedInstanceState){
mDrawerLayout.openDrawer(containerView);
}
}
});
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName, preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
}
そして、ここでRecyclerViewアダプタ:
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{
private LayoutInflater inflater;
List<Information> data = Collections.emptyList();
public MyAdapter(Context context,List<Information> data) {
inflater=LayoutInflater.from(context);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row,parent,false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Information current = data.get(position);
holder.title.setText(current.title);
holder.icon.setImageResource(current.iconId);
}
@Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.listText);
icon = (ImageView)itemView.findViewById(R.id.listIcon);
}
}
}
私は間違って何をしているのですか?
ありがとうございました。しかし、それは問題を解決しません。まだ空白の断片。 – Koss
recyclviewのlayout_heightをmatch_parentに設定しようとします。テストのためだけに。 –
何も変更されていません。 – Koss