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

./MainActivity.java:22: error: cannot find symbol

inSAveInstance(Bundle outState){ outState.putString(KEY_USERENTRY, mTextView.getText().toString()); }

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

public class MainActivity extends Activity {

  public TextView mTextView;
  public String KEY_USERENTRY = "KEY_USERENTRY";
  public String mString ;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mTextView = (TextView) findViewById(R.id.textView);
    mString = "oli";
    mTextView.setText(mString);
  }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString(KEY_USERENTRY, mTextView.getText().toString());
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        mString = savedInstanceState.getString(KEY_USERENTRY);
        mTextView.setText(mString);
    }
}

1 Answer

Hey Ali,

You just need to correct these lines and you'll be able to complete the challenge:

Change public String KEY_USERENTRY = "KEY_USERENTRY"; to public static final String KEY_USERENTRY = "KEY_USERENTRY";

You don't really need these ones ([public String mString ;] , [mString = "oli";] and [mTextView.setText(mString)])

Change this line outState.putString(KEY_USERENTRY, mTextView.getText().toString()); so that it becomes:

@Override

protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString(KEY_USERENTRY, 10);
}

Ultimately change mString = savedInstanceState.getString(KEY_USERENTRY); to have something like this:

 @Override

 protected void onRestoreInstanceState(Bundle savedInstanceState) {
     super.onRestoreInstanceState(savedInstanceState);
     mTextView.setText(savedInstanceState.getInt(KEY_USERENTRY) + " ");

}

Happy coding