Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Android Activity Lifecycle The Activity Lifecycle Saving and Retrieving Instance State

how to save number 10 in saved instance state

how to save number 10 in saved instance state method

MainActivity.java
import android.content.Intent;
import android.view.View;

public class MainActivity extends Activity {

  public TextView mTextView;
  private static final String KEY_USERENTRY="KEY_USERENTRY";
  private int name=10;


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

    mTextView = (TextView) findViewById(R.id.textView);
  }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
      outstate.putString(KEY_USERENTRY,name);


    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

    }
}
Sang Tran
Sang Tran
6,918 Points

Hi Aditya! 10 is an int which you've already declared as name. Instead of using the putString function try putInt.

thank you

2 Answers

Seth Kroger
Seth Kroger
56,412 Points

Remember that 10 is in integer, not a string. Bundles have separate putX and getX methods for each separate data type. So you should be using putInt() instead of putString().

thank you

MainActivity.java

import android.content.Intent;

import android.view.View;

public class MainActivity extends Activity {

private static final String KEY_USERENTRY= "KEY_USERENTRY";

public TextView mTextView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mTextView = (TextView) findViewById(R.id.textView);

}

@Override

protected void onSaveInstanceState(Bundle outState) {

    super.onSaveInstanceState(outState);

   Bundle bundle=new Bundle();      

  outState.putInt("KEY_USERENTRY",10);

}