Android activity lifecycle TextView. I cannot see which text or string needs to be restored.

Question

KEY_USERKEY must have both String and int values. I can't see the String value Steve Hunter

MainActivity.java

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

public class MainActivity extends Activity {

  public static final String KEY_USERENTRY = "KEY_USERKEY";    
  public TextView mTextView;
  private int x = 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.putInt(KEY_USERENTRY, 10);

    }

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


    }
}

Answer 1 · 2017-03-18T12:14:35Z

March 18, 2017 12:14pm

Hi Mal,

In onRestoreInstanceState, call getInt() on the parameter being received, savedInstanceState, and pass in the constant that you defined in the first part of the challenge. This key is associated with the value from onSaveInstanceState that you set earlier - 10. Note, my constant is called something different to yours, so change that to fit.

This will return an int, 10. We want to use this to be the value held by mTextView which we will set using setText(). That is expecting a String as a parameter, not an int. Use a moosh to perform the type cast. All that looks like:

        mTextView.setText(savedInstanceState.getInt(KEY_USERENTRY) + "");

I hope that helps,

Steve.

Welcome to the Treehouse Community

Looking to learn something new?

Malcolm Mutambanengwe

Malcolm Mutambanengwe

Android activity lifecycle TextView. I cannot see which text or string needs to be restored.

1 Answer

Steve Hunter

Steve Hunter