Исключение нулевого указателя на адаптере Recyclerview

Я новичок в Android, я пытаюсь сделать простой вид переработчика в Android. Но показывает ошибку на классе адаптера. Пожалуйста, помогите мне решить.

Моя основная деятельность:

recycle_view.java:

  package h.safmical.swipe;

    import android.os.Bundle;
    import android.support.annotation.Nullable;
    import android.support.v7.app.AppCompatActivity;
    import android.support.v7.widget.LinearLayoutManager;
    import android.support.v7.widget.RecyclerView;

    import java.util.ArrayList;
    import java.util.List;



    public class recycle_view extends AppCompatActivity{
        private RecyclerView recyclerView;
        private recycle_view_adapter adapter;
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            recyclerView= (RecyclerView) findViewById(R.id.recycleview);
            adapter = new recycle_view_adapter(this,getData());
            recyclerView.setAdapter(adapter);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }
        public static List<recycle_view_information> getData(){
            List<recycle_view_information> data=new ArrayList<>();
            int[] icons={R.drawable.my};
            String[] titles={"Harsh"};
             for (int i=0;i<icons.length && i<titles.length;i++){
                 recycle_view_information current=new recycle_view_information();
                 current.iconid=icons[i];
                 current.title=titles[i];
                 data.add(current);

             }
             return data;
        }
    }

Адаптер для просмотра переработчика:

recycle_view_adapter.java:

package h.safmical.swipe;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.Collections;
import java.util.List;



    public class recycle_view_adapter extends RecyclerView.Adapter<recycle_view_adapter.MyViewHolder> {

        private  LayoutInflater inflater;
        List<recycle_view_information> data= Collections.emptyList();


        public recycle_view_adapter(Context context,List<recycle_view_information> data){
            inflater=LayoutInflater.from(context);
        }



        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view=inflater.inflate(R.layout.recycle_view_custom_row,parent,false);
            MyViewHolder holder=new MyViewHolder(view);
            return holder;
        }

        @Override
        public void onBindViewHolder(MyViewHolder holder, int position) {

             recycle_view_information current=data.get(position);
            holder.title.setText(current.title);
            holder.icon.setImageResource(current.iconid);
        }

        @Override
        public int getItemCount() {
            return 0;
        }
        class MyViewHolder extends RecyclerView.ViewHolder{
           TextView title;
            ImageView icon;

            public MyViewHolder(View itemView) {
                super(itemView);
                title= (TextView) itemView.findViewById(R.id.text);
                icon= (ImageView) itemView.findViewById(R.id.image);
            }
        }
    }

recycle_view_information.java:

package h.safmical.swipe;
    public class recycle_view_information {
        int iconid;
        String title;
    }

Мои xml файлы:recycle_view.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
    android:id="@+id/recycleview"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</LinearLayout>

recycle_view_custom_row.xml:

<?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">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/image"
        android:src="@mipmap/ic_launcher_round"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/text"
        android:text="dummy"
        android:layout_toRightOf="@+id/image"
        android:layout_marginTop="15dp"
        />

</RelativeLayout>

Ошибка Logcat:

06-15 15:03:38.904 8891-8891/h.safmical.swipe E/AndroidRuntime: FATAL EXCEPTION: main
                                                                Process: h.safmical.swipe, PID: 8891
                                                                java.lang.RuntimeException: Unable to start activity ComponentInfo{h.safmical.swipe/h.safmical.swipe.recycle_view}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setAdapter(android.support.v7.widget.RecyclerView$Adapter)' on a null object reference
                                                                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
                                                                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
                                                                    at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
                                                                    at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                    at android.os.Looper.loop(Looper.java:148)
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5443)
                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
                                                                 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setAdapter(android.support.v7.widget.RecyclerView$Adapter)' on a null object reference
                                                                    at h.safmical.swipe.recycle_view.onCreate(recycle_view.java:24)
                                                                    at android.app.Activity.performCreate(Activity.java:6245)
                                                                    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1130)
                                                                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
                                                                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490) 
                                                                    at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354) 
                                                                    at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                    at android.os.Looper.loop(Looper.java:148) 
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5443) 
                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 

2 ответа

Вы пропустите эту строку в onCreate

setContentView(R.layout.activity_recyclerview);

Вы не установили вид своей деятельности.

Напишите следующее в вашей деятельности onCreate метод

setContentView(R.layout.recycle_view.xml)