запуск через код

import android.annotation.SuppressLint; import android.content.Context; import android.content.Intent; import android.support.annotation.NonNull; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView;  import java.util.ArrayList; import java.util.List;  public class RVAdapter extends RecyclerView.Adapter<RVAdapter.ItemViewHolder> {      private final List<Person> mItems;       public RVAdapter(ArrayList<Person> mItems) {         this.mItems =   mItems;      }      public class ItemViewHolder extends RecyclerView.ViewHolder {          public final TextView mTextView;         private final TextView textContent;          ItemViewHolder(@NonNull View itemView) {             super(itemView);             mTextView = itemView.findViewById(R.id.list_item);             textContent= itemView.findViewById(R.id.textContent);         }     }      @SuppressLint("RecyclerView")     @Override     public void onBindViewHolder(@NonNull ItemViewHolder itemViewHolder, final int position) {         //noinspection deprecation         itemViewHolder.mTextView.setText(mItems.get(position).name);         //noinspection deprecation         itemViewHolder.textContent.setText(mItems.get( position).textContent );         itemViewHolder.itemView.setOnClickListener(new View.OnClickListener() {              @Override             public void onClick(@NonNull View v) {                 Context context= v.getContext();                 Intent i = new Intent(context,JsonActivity.class);                 i.putExtra("text",(mItems.get(position).textContent)); // put image data in Intent                 context.startActivity(i); // start Intent              }           });}      @NonNull     @Override     public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {         View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_row, viewGroup, false);         return new ItemViewHolder(view);     }      @Override     public int getItemCount() {         return mItems.size();     } 

код обработки

import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.text.Html; import android.widget.TextView;  import com.android.volley.Request.Method; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest;  import org.json.JSONObject;  public class JsonActivity extends Activity {     //String s=null;      ProgressDialog PD;      TextView tv;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         Bundle extras = getIntent().getExtras(); // get Intent which we set from Previous Activity         String s = extras != null ? extras.getString( "text" ) : null;         setContentView(R.layout.activity_json);          tv = (TextView) findViewById(R.id.tv);          PD = new ProgressDialog(this);         PD.setMessage("Loading.....");         PD.setCancelable(false);          //  makejsonobjreq();          //}          //private void makejsonobjreq() {         PD.show();         String url = ("http://proforientator.info/?json=get_page&"+s);          JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET, url,                 null, new Response.Listener<JSONObject>() {              @Override             public void onResponse(JSONObject response) {                 JSONObject page = response.optJSONObject("page" );                  // String name = page.optString("title");                  String region = page.optString("content");                            tv.setText(Html.fromHtml(region).toString());                   PD.dismiss();              }         }, new Response.ErrorListener() {              @Override             public void onErrorResponse(VolleyError error) {                 PD.dismiss();             }         });         MyApplication.getInstance().addToReqQueue(jsonObjReq, "jreq");     } } 

строка ошибки

 MyApplication.getInstance().addToReqQueue(jsonObjReq, "jreq"); 

класс куда обращается

    import android.annotation.SuppressLint; import android.app.Application;  import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley;  @SuppressLint("Registered") public class MyApplication extends Application {      private RequestQueue mRequestQueue;     private static MyApplication mInstance;      @Override     public void onCreate() {         super.onCreate();         mInstance = this;     }      public static synchronized MyApplication getInstance() {         return mInstance;     }      public RequestQueue getReqQueue() {         if (mRequestQueue == null) {             mRequestQueue = Volley.newRequestQueue(getApplicationContext());         }          return mRequestQueue;     }      public <T> JsonObjectRequest addToReqQueue(Request<T> req, String tag) {          getReqQueue().add(req);         return null;     }      public <T> void addToReqQueue(Request<T> req) {          getReqQueue().add(req);     }      public void cancelPendingReq(Object tag) {         if (mRequestQueue != null) {             mRequestQueue.cancelAll(tag);         }     } }