This is my first android project. I don't know much about android development. Please give me a detailed solution. I am trying to move from my login activity to recyclerview activity but after clicking on login button my application is crashing.
This is log cat
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference at android.view.LayoutInflater.from(LayoutInflater.java:284) at com.example.trackmybusadmin.recyclerAdapter.onCreateViewHolder(recyclerAdapter.java:27) at com.example.trackmybusadmin.recyclerAdapter.onCreateViewHolder(recyclerAdapter.java:13) at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:7078) at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6235) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114) at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303) at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1627) at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587) at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:665) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3851) at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4404) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1855) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at com.android.internal.policy.DecorView.onLayout(DecorView.java:812) at android.view.View.layout(View.java:22088) at android.view.ViewGroup.layout(ViewGroup.java:6325) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3191) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2701) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1819) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7781) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1031) at android.view.Choreographer.doCallbacks(Choreographer.java:854) at android.view.Choreographer.doFrame(Choreographer.java:789) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1016) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:224) at android.app.ActivityThread.main(ActivityThread.java:7590)This is my recylerAdapter.java file
public class recyclerAdapter extends RecyclerView.Adapter<recyclerAdapter.MyViewHolder> {String data1[],data2[],data3[];int img[];Context context;public recyclerAdapter(Context ct, String title[],String description[],String count[], int imageicons[]){data1=title;data2=description;data3=count;img=imageicons;}@NonNull@Overridepublic MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { LayoutInflater inflater = LayoutInflater.from(context); View view = inflater.inflate(R.layout.additembutton,parent,false); return new MyViewHolder(view);}@Overridepublic void onBindViewHolder(@NonNull MyViewHolder holder, int position) { holder.text1.setText(data1[position]); holder.text2.setText(data2[position]); holder.text3.setText(data3[position]); holder.img1.setImageResource(img[position]);}@Overridepublic int getItemCount() { return data1.length;}public class MyViewHolder extends RecyclerView.ViewHolder{ TextView text1,text2,text3; ImageView img1; public MyViewHolder(@NonNull View itemView) { super(itemView); text1 = itemView.findViewById(R.id.textViewtitle); text2 = itemView.findViewById(R.id.textViewdescription); text3 = itemView.findViewById(R.id.textViewCount); img1 = itemView.findViewById(R.id.imageView); }}}
This is my MainActivity2.java
public class MainActivity2 extends AppCompatActivity {String title[],description[],count[];int imageicons[] = {R.drawable.bus,R.drawable.student};RecyclerView recyclerView;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); title = getResources().getStringArray(R.array.Title); description = getResources().getStringArray(R.array.Description); count = getResources().getStringArray(R.array.Count); recyclerView = findViewById(R.id.recycleview); recyclerAdapter ra = new recyclerAdapter(this, title, description,count,imageicons); recyclerView.setAdapter(ra); recyclerView.setLayoutManager(new LinearLayoutManager(this));}}