Passing Data activity to TabView in android

Question

I want to pass data from main activity to one tab of TabView.Here is my code and it isn't working,what to do now

There is my codes MainActivity :

public class MainActivity extends AppCompatActivity {

    Button button;
    EditText text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button= (Button) findViewById(R.id.getInfoButton);
        text= (EditText) findViewById(R.id.gitHubUserName);
        Logger.addLogAdapter(new AndroidLogAdapter());



        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                final String user = text.getText().toString();
                Intent in=new Intent(MainActivity.this,Tab.class);
                in.putExtra("SS",user);
                Logger.d(user);

                Bundle bundle=new Bundle();
                bundle.putString("NAME",user);
                ProfileActivity pro = new ProfileActivity();
                pro.setArguments(bundle);

                startActivity(in);
            }
        });





    }
}

my Adapter for tabViews :

public class PagerAdapter extends FragmentPagerAdapter {

    public PagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        switch (position){
            case 0:
                ProfileActivity profileActivity=new ProfileActivity();
                return profileActivity;
            case 1:
                FollowersActivity followersActivity=new FollowersActivity();
                return followersActivity;
                case 2:
                PublicRepos publicRepos=new PublicRepos();
                return publicRepos;

            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 3;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return "Profile Info";
            case 1:
                return "Followers";
            case 2:
                return "Public Repos";
        }
        return null;
    }
}

and this is ProfileActivity where I want to pass the data which I got from EditText in Main Activity :

public class ProfileActivity extends Fragment {

    ImageView imageView;
    TextView name;
    TextView bio;


    String text;

    public void dataPass(String txt){
        text = txt;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.activity_profile, container, false);
        name = rootView.findViewById(R.id.name);
        bio = rootView.findViewById(R.id.bio);
        Logger.addLogAdapter(new AndroidLogAdapter());


        Bundle bundle = this.getArguments();
        String nameString = bundle.getString("NAME");
        Logger.d(nameString);
        name.setText(nameString);


        return rootView;
    }
}

when I run the app, app stopped working and in logcat this error :

 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
                                                                              at com.salman.getgithubofgeek.Activity.Activity.Activites.ProfileActivity.onCreateView(ProfileActivity.java:43)

Possible duplicate of [What is a NullPointerException, and how do I fix it?](https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — Zoe, Sep 25 '17 at 05:58

score 2 · Accepted Answer · answered Sep 20 '17 at 15:29

You cannot use setArguments like that.

Do this:

button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        final String user = text.getText().toString();
        Intent in=new Intent(MainActivity.this,Tab.class);
        in.putExtra("SS",user);
        in.putExtra("NAME",user);
        Logger.d(user);

        startActivity(in);
    }
});

then in Tab activity, pass the extra to the adapter wherever you call it like so:

PagerAdapter adapter = new PagerAdapter(fm, user);

and make the following changes to the adapter class:

public class PagerAdapter extends FragmentPagerAdapter {
    String nameString;
    public PagerAdapter(FragmentManager fm, String nameString) {
        super(fm);
        this.nameString = nameString;
    }
    @Override
public Fragment getItem(int position) {
    switch (position){
        case 0:
            ProfileActivity profileActivity=new ProfileActivity();
            Bundle bundle=new Bundle();
            bundle.putString("NAME",nameString);
            profileActivity.setArguments(bundle);
            return profileActivity;
        case 1:
            FollowersActivity followersActivity=new FollowersActivity();
            return followersActivity;
        case 2:
            PublicRepos publicRepos=new PublicRepos();
            return publicRepos;

        default:
            return null;
    }
}

@Override
public int getCount() {
    // Show 3 total pages.
    return 3;
}

@Override
public CharSequence getPageTitle(int position) {
    switch (position) {
        case 0:
            return "Profile Info";
        case 1:
            return "Followers";
        case 2:
            return "Public Repos";
    }
    return null;
   }
}

score 0 · Answer 2 · answered Sep 20 '17 at 15:26

0

The problem is you are trying to add the bundle in fragment that is in `

TabActivity

and inPager` you are again declaring ProfileActivity fragment that is with out

setArguments()

. All you need to do is send the bundle to activity first and then before using ProfileActivity fragment in Pager set the bundle to the ProfileActivity fragment.

answered Sep 20 '17 at 15:26

Nouman Ch

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I didn't get it...I request it to explain it clearly :D – Salman Sep 20 '17 at 15:31
sorry its actually putExtra("Name",user); – Nouman Ch Sep 20 '17 at 21:25
and for getting value from intent you can use getIntent().getStringExtra("Name") – Nouman Ch Sep 20 '17 at 21:26

score 0 · Answer 3 · answered Sep 20 '17 at 15:30

Button button;
EditText text;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button= (Button) findViewById(R.id.getInfoButton);
    text= (EditText) findViewById(R.id.gitHubUserName);
    Logger.addLogAdapter(new AndroidLogAdapter());



    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            final String user = text.getText().toString();
            Intent in=new Intent(MainActivity.this,Tab.class);
            in.putExtra("SS",user);
            Logger.d(user);
           //modification goes here
            intent.putString("NAME",user);

            startActivity(in);
        }
    });





}
}

and

public PagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    switch (position){
        case 0:
            ProfileActivity profileActivity=new ProfileActivity();
           //modifications goes here
           Bundle b = new Bundle();
            bundle.putString("NAME",user);
            profileActivity.setArguments(b);
            return profileActivity;
        case 1:
            FollowersActivity followersActivity=new FollowersActivity();
            return followersActivity;
            case 2:
            PublicRepos publicRepos=new PublicRepos();
            return publicRepos;

        default:
            return null;
    }
}

@Override
public int getCount() {
    // Show 3 total pages.
    return 3;
}

@Override
public CharSequence getPageTitle(int position) {
    switch (position) {
        case 0:
            return "Profile Info";
        case 1:
            return "Followers";
        case 2:
            return "Public Repos";
    }
    return null;
}
}

there is no method called intent.putString(); – Salman Sep 20 '17 at 16:19 — Salman, Sep 20 '17 at 16:19

Passing Data activity to TabView in android

3 Answers3