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

Retrieve and Restore the value in TextView

I don't understand what is that I am missing here. Please review the code changes that i did to validate and suggest me on the same.

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;
  private Int mValue;

  @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.putInt(KEY_USERENTRY, 10);

    }

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

      mValue = savedInsanceState.getInt(KEY_USERENTRY);
      mTextView.setText(mValue + "");
    }
}

1 Answer

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher

Just looked it over real quick, but Int should be lowercase:

  private int mValue;