点击recyclerView new activity Error Attempt to invoke virtual method

Question

I need help, for onclick on recyclerview and open new actity, im clicked in item list close app and logcat error is: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference

My code:

 @Override
public void onBindViewHolder(final estadoView estadoView, final int i) {
    final Estado estado = estadoList.get(i);
    estadoView.txtnombreMostrar.setText(estado.getStateName());



   estadoView.txtnombreMostrar.setOnClickListener(new View.OnClickListener() {

       @Override
       public void onClick(View v) {
           Intent intent =  new Intent(context, Invernadero.class);
           context.startActivity(intent);
       } });


}

And my public class is:

public class estadoView extends RecyclerView.ViewHolder {
    private TextView  txtnombreMostrar;

    RelativeLayout parentLayout;


    public estadoView(@NonNull View itemView) {
    super(itemView);
    txtnombreMostrar = itemView.findViewById(R.id.txtNombreMostrar);

    }

}

whats is the problem? Im search in web, in forums, but im not solve my problem

Code

LogCat

context is null, how to solved?

Answer 1

It seems that you've a context issue, but as you didn't provide how did you get the context, for now replace it in your view listener with v.getContext() as below:

 @Override
public void onBindViewHolder(final estadoView estadoView, final int i) {
    final Estado estado = estadoList.get(i);
    estadoView.txtnombreMostrar.setText(estado.getStateName());



   estadoView.txtnombreMostrar.setOnClickListener(new View.OnClickListener() {

       @Override
       public void onClick(View v) {
           Intent intent =  new Intent(v.getContext(), Invernadero.class);
           v.getContext().startActivity(intent);
       } });


}

Answer 2

check your context when start a new Intent, where you get the context, maybe the context still null or not assigned yet

java.lang.String android.content.Context.getPackageName()

i'm sure the context is null