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Ich versuche, Navigation Schublade Recycler zu machen, aber das Hauptproblem ist, dass, wenn ich dies ausführen, zeigt es nur die erste Zeile mit seinem Symbol und die wie zu Hause hat Titel und nicht jeder andere. Ich habe versucht, mit Kamera-Symbol, aber es zeigt nichts anderes als die erste Zeile.Recycler Ansicht in Navigation Schublade zeigt nicht mehr als ein Element
Screenshot von Ausgabe:
Hier sind alle Java-Dateien
MainActivity.java
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=(Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(true);
Nav_drawer nav_drawer=(Nav_drawer)getSupportFragmentManager().findFragmentById(R.id.f1);
nav_drawer.setUp(R.id.f1,(DrawerLayout)findViewById(R.id.activity_main),toolbar);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
Sadapter.java
public class Sadapter extends RecyclerView.Adapter<Sadapter.MyViewHolder> {
private LayoutInflater inflater;
List<Information> data= Collections.emptyList();
public Sadapter(Context context,List<Information> data)
{
inflater=LayoutInflater.from(context);
this.data=data;
}
@Override
public int getItemCount() {
return data.size();
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Information current=data.get(position);
holder.title.setText(current.title);
holder.image.setImageResource(current.iconid);
}
@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;
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView title;
ImageView image;
public MyViewHolder(View itemView){
super(itemView);
title=(TextView) itemView.findViewById(R.id.tv);
image=(ImageView) itemView.findViewById(R.id.im);
}
}
}
NavigationDrawer.java
public class Nav_drawer extends Fragment {
private RecyclerView recyclerView;
public static final String PREF_NAME="test_pref";
public static final String KEY_USER_LERNED_DRAWER="user_learned_drawer";
private ActionBarDrawerToggle mactionBarDrawerToggle;
private DrawerLayout mdrawerLayout;
private Sadapter sadapter;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstantState;
public View view;
public Nav_drawer() {
// Required empty public constructor
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer=Boolean.valueOf(readFromPreferences(getActivity(),KEY_USER_LERNED_DRAWER,"false"));
if (savedInstanceState!=null)
{
mFromSavedInstantState=true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View layout=inflater.inflate(R.layout.fragment_nav_drawer, container, false);
recyclerView=(RecyclerView) layout.findViewById(R.id.drawer_list);
sadapter=new Sadapter(getActivity(),getData());
recyclerView.setAdapter(sadapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return layout;
}
public static List<Information> getData(){
List<Information> data=new ArrayList<>();
int[] icons={R.drawable.ic_home_black_18dp,R.drawable.ic_camera_alt_black_18dp};
String[] titles={"Home","Camera"};
for (int i=0;i<titles.length && i<icons.length; i++)
{
Information current= new Information();
current.iconid=icons[i];
current.title=titles[i];
data.add(current);
}
return data;
}
public void setUp(int fragId, DrawerLayout drawerLayout, Toolbar toolbar)
{
view=getActivity().findViewById(fragId);
mdrawerLayout=drawerLayout;
mactionBarDrawerToggle=new ActionBarDrawerToggle(getActivity(),mdrawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){
@Override
public void onDrawerOpened(View drawerView) {
if (!mUserLearnedDrawer)
{
mUserLearnedDrawer=true;
saveToPreferences(getActivity(),KEY_USER_LERNED_DRAWER,mUserLearnedDrawer+"");
}
getActivity().invalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView) {
getActivity().invalidateOptionsMenu();
}
};
if (!mUserLearnedDrawer&&!mFromSavedInstantState)
{
mdrawerLayout.openDrawer(view);
}
mdrawerLayout.addDrawerListener(mactionBarDrawerToggle);
mdrawerLayout.post(new Runnable() {
@Override
public void run() {
mactionBarDrawerToggle.syncState();
}
});
}
public void saveToPreferences(Context context,String preferenceName,String preferenceValue)
{
SharedPreferences sharedPreferences=context.getSharedPreferences(PREF_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_NAME,Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName,defaultValue);
}
}
Information.java
public class Information {
int iconid;
String title;
}
Und hier sind alle XML-Dateien
mainactivity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<RelativeLayout
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.alshariq.materia.MainActivity">
<include
layout="@layout/app_bar"
android:id="@+id/app_bar"/>
</RelativeLayout>
<fragment
android:layout_width="286dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:id="@+id/f1"
app:layout="@layout/fragment_nav_drawer"
android:name="com.example.alshariq.materia.Nav_drawer"
tools:layout="@layout/fragment_nav_drawer"/>
</android.support.v4.widget.DrawerLayout>
appbar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="56dp"
android:background="@color/colorPrimary"
android:elevation="4dp"
>
</android.support.v7.widget.Toolbar>
customrow.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/im"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher"
android:padding="8dp"
android:layout_gravity="center_vertical"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dummy Text"
android:padding="8dp"
android:id="@+id/tv"
android:layout_gravity="center_vertical"/>
</LinearLayout>
fragmentnavdrawer.xml`
<RelativeLayout 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"
tools:context="com.example.alshariq.materia.Nav_drawer"
android:background="#ffffff"
android:elevation="16dp">
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="190dp"
android:background="@color/colorPrimary">
<ImageView
android:layout_width="match_parent"
android:layout_height="77dp"
android:src="@mipmap/ic_launcher"
android:layout_marginTop="26dp"/>
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/drawer_list"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_below="@+id/container"
android:layout_alignParentStart="true">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
Satz 'height' von benutzerdefinierten Zeile zu' wrap_content'. –
ändern Sie die android: layout_height = "wrap_content" zu match_parent in
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