title: ERROR : Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
body: <p>I am trying to pass data from Activity to Fragment.</p>
  
  <p>This is my Calling Activity. using this activity i want to pass data to ProfileFragment
  for this purpose i am using Bundle.
  but i get error at ProfileFragment as show above</p>
  
  <p><strong>NewAccount.java</strong></p>
  
  <pre><code>package com.example.takeattendence;
  
  import androidx.appcompat.app.AppCompatActivity;
  
  
  import android.app.Fragment;
  import android.app.FragmentManager;
  import android.content.ContentValues;
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.net.Uri;
  import android.os.Bundle;
  import android.text.TextUtils;
  import android.util.Base64;
  import android.util.Patterns;
  import android.view.View;
  import android.widget.AdapterView;
  import android.widget.ArrayAdapter;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.Spinner;
  import android.widget.TextView;
  import android.widget.Toast;
  
  import java.io.ByteArrayOutputStream;
  import java.util.ArrayList;
  import java.util.List;
  import com.example.takeattendence.database.LoginContract.LoginEntry;
  import com.example.takeattendence.database.LoginContractStudent;
  import com.example.takeattendence.database.LoginDbHelper;
  import com.example.takeattendence.database.LoginContractStudent.LoginEntryStudent;
  
  
  public class NewAccount extends AppCompatActivity
  {
  
  
  
  
      //EditText field to First name of user
      private EditText mFirstNameEditText;
  
      //EditText field to Last Name of user
      private EditText mLastNameEditText;
  
      //EditText field to Phone Number of user
      private EditText mPhoneNumberEditText;
  
      //EditText field to Email Id of user
      private EditText mEmailIdEditText;
  
      //EditText field to Password of User
      private EditText mPasswordEditText;
  
      //Spinner field for post
      private Spinner mPostSpinner;
  
  
      private String mPost = "Leturer";
  
      //Spinner field to gender of user
      private Spinner mGenderSpinner;
  
      private String mGender = "Other";
  
      //Button for Register
      private Button mRegisterButton;
  
      //Textview for Log in
      private TextView mLogInTextView;
      @Override
      protected void onCreate(Bundle savedInstanceState)
      {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_new_account);
  
  
  
  
          mFirstNameEditText =(EditText)findViewById(R.id.editText_first_name);
          mLastNameEditText = (EditText)findViewById(R.id.editText_last_name);
          mPhoneNumberEditText =(EditText)findViewById(R.id.editText_phone_number);
          mEmailIdEditText = (EditText) findViewById(R.id.editText_email_id_sign_up);
          mPasswordEditText =(EditText) findViewById(R.id.editText_pass_sign_up);
          mPostSpinner = (Spinner)findViewById(R.id.spinner_post);
          mGenderSpinner=(Spinner) findViewById(R.id.spinner_gender);
          mRegisterButton = (Button) findViewById(R.id.button_register);
          mLogInTextView =  (TextView) findViewById(R.id.textview_log_in);
  
          setUpSpinnerPost();
          setUpSpinnerGender();
  
          mLogInTextView.setOnClickListener(new View.OnClickListener()
          {
              @Override
              public void onClick(View v)
              {
                  Intent i = new Intent(NewAccount.this,MainActivity.class);
                  startActivity(i);
              }
          });
          final LoginDbHelper mLoginDbHelper = new LoginDbHelper(this);
  
  
          mRegisterButton.setOnClickListener(new View.OnClickListener()
          {
              @Override
              public void onClick(View v)
              {
                  //insert data
                  insertUserData();
  
              }
          });
  
  
      }
  
      public void insertUserData()
      {
  
          Bundle bundle = new Bundle();
          bundle.putString("data", "Data");
          // Your fragment
          ProfileFragment obj = new ProfileFragment();
          obj.setArguments(bundle);
  
          Intent i = new Intent(NewAccount.this,WelcomeApp.class);
          startActivity(i);
      }
  
  
  }
  </code></pre>
  
  <p><strong>WelcomeApp.java</strong></p>
  
  <pre><code>package com.example.takeattendence;
  
  import androidx.annotation.NonNull;
  import androidx.appcompat.app.ActionBarDrawerToggle;
  import androidx.appcompat.app.AppCompatActivity;
  import androidx.appcompat.widget.Toolbar;
  import androidx.core.view.GravityCompat;
  import androidx.drawerlayout.widget.DrawerLayout;
  
  import android.content.Context;
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.os.Bundle;
  import android.view.MenuItem;
  
  import com.google.android.material.navigation.NavigationView;
  
  public class WelcomeApp extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener
  {
      private DrawerLayout drawerLayout;
  
      @Override
      protected void onCreate(Bundle savedInstanceState)
      {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_welcome_app);
  
          Toolbar toolbar = findViewById(R.id.nav_toolbar);
          setSupportActionBar(toolbar);
  
          drawerLayout = findViewById(R.id.drawer_layout);
  
          NavigationView navigationView = findViewById(R.id.nav_view);
          navigationView.setNavigationItemSelectedListener(this);
  
          ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,
                  R.string.navigation_drawer_open,R.string.navigation_drawer_close);
  
          drawerLayout.addDrawerListener(actionBarDrawerToggle);
          actionBarDrawerToggle.syncState();
  
          if(savedInstanceState == null)
         {
              getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                      new ProfileFragment()).commit();
  
  //            Intent i = new Intent(WelcomeApp.this, TestAcitivity.class);
  //            startActivity(i);
              navigationView.setCheckedItem(R.id.nav_profile);
          }
  
  //        finish();
      }
  
      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem menuItem)
      {
          switch (menuItem.getItemId())
          {
              case R.id.nav_profile:
  
                  getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                          new ProfileFragment()).commit();
                  break;
  
              case R.id.nav_update_profile:
                  getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                          new UpdateProfileFragment()).commit();
                  break;
  
              case R.id.nav_see_database:
                  getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                          new StudenetInfoFragment()).commit();
                  break;
  
              case R.id.nav_logout:
  //                Intent in = new Intent(WelcomeApp.this,MainActivity.class);
  //                startActivity(in);
  //                finish();
  
  //                SharedPreferences.Editor editor = getSharedPreferences("POS", MODE_PRIVATE).edit();
  //                editor.putString("password", "");
  //                editor.putString("email", "");
  //                editor.putBoolean("isLoggedIn", false);
  //                editor.apply();
  //
  //                Intent intent = new Intent(getApplicationContext(), MainActivity.class);
  //                intent.putExtra("finish", true);
  //                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
  //                startActivity(intent);
  
  //                finish();
  
                  SharedPreferences.Editor editor = getSharedPreferences("name", MODE_PRIVATE).edit();
                  editor.putString("password", "");
                  editor.putString("email", "");
                  editor.putBoolean("isLoggedIn", false);
                  editor.apply();
  
                  Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                  intent.putExtra("finish", true);
                  intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                  startActivity(intent);
  
                  finish();
  
                  break;
  
              default:
          }
  
          drawerLayout.closeDrawer(GravityCompat.START);
          return true;
      }
      @Override
      public void onBackPressed()
      {
          moveTaskToBack(true);
      }
  
  }
  </code></pre>
  
  <p><strong>ProfileFragment.java</strong></p>
  
  <pre><code>package com.example.takeattendence;
  
  import android.content.Intent;
  
  import android.graphics.Bitmap;
  import android.os.Bundle;
  
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.Button;
  
  import android.widget.TextView;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  
  import androidx.fragment.app.Fragment;
  
  
  import static android.app.Activity.RESULT_OK;
  
  public class ProfileFragment extends Fragment //implements LoaderManager.LoaderCallbacks&lt;Cursor&gt;
  {
  
  
      public ProfileFragment()
      {
  
      }
      @Nullable
      @Override
      public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)
      {
          View view = inflater.inflate(R.layout.fragment_profile,container,false);
  
          TextView firstNameTextView = (TextView)view.findViewById(R.id.textview_profile_first_name);
  
          String strtext = this.getArguments().getString("data");
          firstNameTextView.setText(strtext);
          return view;
  
  
      }
  </code></pre>
  
  <p>I had searched on google but I am not getting proper solution.
  Thank You in Advance.</p>