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Android Android Activity Lifecycle Introducing SharedPreferences Saving and Retrieving Data with SharedPreferences

Varun Singh
Varun Singh
1,905 Points
Posted by Varun Singh
Varun Singh
1,905 Points

SharedPreferences

Compiler error why?

import android.view.View; import android.os.Bundle; import android.widget.EditText; import android.content.Context; import android.content.SharedPreferences;

public class MainActivity extends Activity { private static final String PREFS_FILE = ""; private static final String KEY_CHECKBOX = "key_checkbox"; private String SharedPreferences.Editor mEditor; private String SharedPreferences mSharedPreferences; public CheckBox mCheckBox;

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

mCheckBox = (CheckBox) findViewById(R.id.checkBox);
mSharedPrefrences = getSharedPreferences(PREFS_FILE,Context.PRIVATE_MODE);
mEditor = mSharedPrefrences.edit();

} }

MainActivity.java 
import android.view.View;
import android.os.Bundle;
import android.widget.EditText;
import android.content.Context;
import android.content.SharedPreferences;

public class MainActivity extends Activity {
  private static final String PREFS_FILE = "";
  private static final String KEY_CHECKBOX = "key_checkbox";
  private String SharedPreferences.Editor mEditor;
  private String SharedPreferences mSharedPreferences;
  public CheckBox mCheckBox;


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

    mCheckBox = (CheckBox) findViewById(R.id.checkBox);
    mSharedPrefrences = getSharedPreferences(PREFS_FILE,Context.PRIVATE_MODE);
    mEditor = mSharedPrefrences.edit();

  }
}

1 Answer

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

You can't declare two different types for a variable. I don't believe that either are supposed to be Strings:

  private String SharedPreferences.Editor mEditor;
  private String SharedPreferences mSharedPreferences;
Varun Singh
Varun Singh
1,905 Points
Varun Singh
Varun Singh
1,905 Points

You are rite Seth, actually my first mistake is that SharedPreferences doesn't have a data type. So in this case we will declare: private SharedPreferences .Editor mEditor; private SharedPreferences mSharedPreferences;

and the second one, was just a spelling error of " SharedPreferences " while assigning editor : "mEditor = mSharedPrefrences.edit();"