title: Log statement giving error on printing the value of Intent in android
body: <p>This is getting me error and I don't know how to solve this. I want to use the values passed from other intent. </p>
  
  <pre><code>package com.example.user.shopkeeper.activities;
  
  import android.content.Context;
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.database.sqlite.SQLiteOpenHelper;
  import android.support.design.widget.FloatingActionButton;
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  
  import com.example.user.shopkeeper.R;
  
  public class UserActivity extends AppCompatActivity  {
      SharedPreferences sp;
      private String name, contact, user_id, email;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_user);
  
  //        initViews();
          Bundle extras = getIntent().getExtras();
          if(extras == null){
              email = null;
              name = null;
              contact = null;
              user_id = null;
          }
          else{
              email = extras.getString("Email");
              name = extras.getString("Name");
              user_id = extras.getString("User_Id");
              contact = extras.getString("Contact");
          }
          Log.d("User : ",user_id);
          FloatingActionButton add_user = findViewById(R.id.floatingActionButton7);
          add_user.setOnClickListener(new View.OnClickListener(){
  
                  @Override
                  public void onClick(View v) {
                      Intent i = new Intent(UserActivity.this, AddNewMember.class);
                      i.putExtra("Name",name);
                      i.putExtra("User_Id",user_id);
                      i.putExtra("Contact",contact);
                      startActivity(i);
                  }
          });
  
  
  
      }
  
  //    public void initViews(){
  //        // Values from loginActivity area which is name,email,id,contact
  //
  //        Intent intent = getIntent();
  //        email = intent.getStringExtra("Email");
  //        name = intent.getStringExtra("Name");
  //        user_id = intent.getStringExtra("User_Id");
  //        contact = intent.getStringExtra("Contact");
  //
  //    }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu){
          getMenuInflater().inflate(R.menu.menu_main,menu);
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item){
          switch(item.getItemId()){
              case R.id.logout:
  
                  sp = getSharedPreferences(LoginActivity.MyPREFERENCES, Context.MODE_PRIVATE);
                  SharedPreferences.Editor editor = sp.edit();
                  editor.clear();
                  editor.apply();
  
                  Intent in = new Intent(UserActivity.this,LoginActivity.class);
                  startActivity(in);
                  finish();
                  return true;
          }
          return false;
      }
  </code></pre>
  
  <p>I have updated both the files,, the one from where I am sending the values and the other from where I am trying to receive</p>
  
  <p>One is LoginActivity File and the other is UserActivity file.</p>
  
  <pre><code>package com.example.user.shopkeeper.activities;
  
  import android.content.Context;
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.support.constraint.ConstraintLayout;
  import android.support.design.widget.Snackbar;
  import android.support.design.widget.TextInputEditText;
  import android.support.design.widget.TextInputLayout;
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.support.v7.widget.AppCompatButton;
  import android.support.v7.widget.AppCompatTextView;
  import android.util.Log;
  import android.view.View;
  
  import com.example.user.shopkeeper.R;
  import com.example.user.shopkeeper.helper.InputValidation;
  import com.example.user.shopkeeper.sql.DatabaseHelper;
  
  import java.util.List;
  
  public class LoginActivity extends AppCompatActivity implements View.OnClickListener{
  
      public final AppCompatActivity activity = LoginActivity.this;
      private ConstraintLayout constraintLayout;
      private TextInputLayout eT_email;
      private TextInputLayout eT_password;
      private TextInputEditText email;
      private TextInputEditText password;
      private AppCompatButton login;
      private AppCompatTextView sign_up;
  
      private InputValidation inputValidation;
      private DatabaseHelper databaseHelper;
  
      public static final String MyPREFERENCES = "MyPrefs" ;
      public static final String Phone = "phoneKey";
      public static final String Email = "emailKey";
      SharedPreferences sharedpreferences;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_login);
  
          getSupportActionBar().hide();
          sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
          initViews();
          initListeners();
          initObjects();
  
          if(sharedpreferences.getBoolean("logged",false)){
              Intent accountsIntent = new Intent(activity,UserActivity.class);
              accountsIntent.putExtra("EMAIL",email.getText().toString().trim());
              startActivity(accountsIntent);
              finish();
          }
  
      }
  
      private void initViews(){
          constraintLayout = findViewById(R.id.constraint_layout);
          eT_email = findViewById(R.id.eT_email);
          eT_password = findViewById(R.id.eT_Password);
          email = findViewById(R.id.email);
          password = findViewById(R.id.password);
          login = findViewById(R.id.login);
          sign_up = findViewById(R.id.sign_up);
      }
  
      private void initListeners(){
          login.setOnClickListener(this);
          sign_up.setOnClickListener(this);
      }
  
      private void initObjects(){
          databaseHelper = new DatabaseHelper(activity);
          inputValidation = new InputValidation(activity);
      }
  
      @Override
      public void onClick(View view){
          switch(view.getId()){
              case R.id.login:
                  verifyFromSQLite();
                  break;
              case R.id.sign_up:
                  Intent register = new Intent(LoginActivity.this, RegisterActivity.class);
                  startActivity(register);
                  break;
          }
      }
  
      private void verifyFromSQLite(){
          if(!inputValidation.isInputTextFilled(email,eT_email,getString(R.string.error_message_email))){
              return;
          }
          if(!inputValidation.eT_email(email,eT_email,getString(R.string.error_message_email))){
              return;
          }
          if(!inputValidation.isInputTextFilled(password,eT_password,getString(R.string.error_message_password))){
              return;
          }
  
  
  
          if(databaseHelper.checkUser(email.getText().toString().trim(),password.getText().toString().trim())){
  
  
              DatabaseHelper db = new DatabaseHelper(LoginActivity.this);
              List&lt;String&gt; contactNumber = db.getContactNumber(email.getText().toString().trim());
              String contact_db = contactNumber.get(0);
              String name_db = contactNumber.get(1);
              String user_id_db = contactNumber.get(2);
              Log.d("Contact ", contact_db);
              Log.d("name_db ", name_db);
              Log.d("User Id  ", user_id_db);
  
              SharedPreferences.Editor editor = sharedpreferences.edit();
              editor.putString(Phone,contact_db);
              editor.putString(Email,email.getText().toString().trim());
              editor.putBoolean("logged",true).apply();
              editor.apply();
  
              Intent accountsIntent = new Intent(activity,UserActivity.class);
  
              Bundle extras = new Bundle();
  
              extras.putString("Email", email.getText().toString().trim());
              extras.putString("Name", name_db);
              extras.putString("User_Id", user_id_db);
              extras.putString("Contact", contact_db);
  
              accountsIntent.putExtras(extras);
  
              emptyInputEditText();
              startActivity(accountsIntent);
              finish();
          }
          else{
              Snackbar.make(findViewById(android.R.id.content),getString(R.string.error_valid_email_password),Snackbar.LENGTH_LONG).show();
          }
      }
  
      private void emptyInputEditText(){
          email.setText(null);
          password.setText(null);
      }
  }
  </code></pre>
  
  <p>The bundle is also giving the error in this case.</p>
  
  <pre><code>11-28 11:57:30.477 16854-16854/com.example.user.shopkeeper E/AndroidRuntime: FATAL EXCEPTION: main
      Process: com.example.user.shopkeeper, PID: 16854
      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.shopkeeper/com.example.user.shopkeeper.activities.UserActivity}: java.lang.NullPointerException: println needs a message
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2792)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2870)
          at android.app.ActivityThread.-wrap11(Unknown Source:0)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1601)
          at android.os.Handler.dispatchMessage(Handler.java:106)
          at android.os.Looper.loop(Looper.java:172)
          at android.app.ActivityThread.main(ActivityThread.java:6590)
          at java.lang.reflect.Method.invoke(Native Method)
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
       Caused by: java.lang.NullPointerException: println needs a message
          at android.util.Log.println_native(Native Method)
          at android.util.Log.d(Log.java:145)
          at com.example.user.shopkeeper.activities.UserActivity.onCreate(UserActivity.java:40)
          at android.app.Activity.performCreate(Activity.java:7023)
          at android.app.Activity.performCreate(Activity.java:7014)
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2745)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2870) 
          at android.app.ActivityThread.-wrap11(Unknown Source:0) 
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1601) 
          at android.os.Handler.dispatchMessage(Handler.java:106) 
          at android.os.Looper.loop(Looper.java:172) 
          at android.app.ActivityThread.main(ActivityThread.java:6590) 
          at java.lang.reflect.Method.invoke(Native Method) 
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
  </code></pre>
  
  <p>The error is this.</p>