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

Posted by Aditya Naiyyar
Aditya Naiyyar
363 Points

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
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.

Aditya Naiyyar
Aditya Naiyyar
363 Points

thank you

2 Answers

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 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().

Aditya Naiyyar
Aditya Naiyyar
363 Points

thank you

wandile moyo
wandile moyo
2,508 Points
wandile moyo
wandile moyo
2,508 Points

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);

​

}