CODEWITHSUNDEEP
androidtextviewfragment
Mnemone
Mnemone

Reputation: 121

Change TextView inside Fragment

I followed this guy's tutorial on how to make an ActionBar. Let's say I want to change the TextView inside one of the fragments. So I added this on my StartActivity.java, under onCreate:

TextView textview = (TextView) findViewById(R.id.textView1);
textview.setText("HI!");

When I start my app, it crashes. Can somebody point me to the right direction?

I hope somebody takes the time to look at the guy's tutorial because his layout is basically the same as mine. Thank you.

Upvotes: 9

Views: 35615

Answers (4)

lino
lino

Reputation: 133

in your main activity, instantiate your fragment class like this

    public class MainActivity extends AppCompatActivity {
          private YourFragmentClass your_fragment;

          @Override
          protected void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
             setContentView(R.layout.activity_main);

              your_fragment = new YourFragmentClass("pass the string value here")
    }
}

in your fragment class, you can then get the string and setText with it like this

    public class YourFragmentclass extends Fragment {

     private String your_text;


      public YourFragmentClass(String your_text) {
       this.your_text = your_text;
      }


      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = (View)inflater.inflate(R.layout.fragment_layout, container, false);

       //set the text of your text view
        TextView textView = (TextView) view.findViewById(R.id.text_view_id);
        textView.setText(your_text);
    }
}

Upvotes: 2

Frits
Frits

Reputation: 74

I found an answer here, and on Stack overflow

It uses the inflater: (for me it worked)


public class MyFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View inf = inflater.inflate(R.layout.fragment_place, container, false);
        TextView tv = (TextView) inf.findViewById(R.id.textview);
        tv.setText("New text");
        return inf;
    }
}

Upvotes: 4

Artis JIANG
Artis JIANG

Reputation: 61

Could you try to replace getView() with getActivity()?

public void setText(String text){
        TextView textView = (TextView) getActivity().findViewById(R.id.detailsText);
        textView.setText(text);
    }

Upvotes: 5

Jarvis
Jarvis

Reputation: 1547

If you want change your component, I suggest you to make a method inside the fragment like this:

    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.TextView;

    public class DetailFragment extends Fragment {

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.details, container, false);
            return view;
        }


        public void setText(String text){
            TextView textView = (TextView) getView().findViewById(R.id.detailsText);
            textView.setText(text);
        }

    }

Upvotes: 13

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