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

Nguyễn Thịnh
Nguyễn Thịnh
1,474 Points

The compiler throw ./MainActivity.java:10: error: cannot find symbol

Why compiler throw this error:

./MainActivity.java:10: error: cannot find symbol public Editor mEditor; ^ symbol: class Editor location: class MainActivity 1 error

public Editor mEditor;

MainActivity.java
import android.view.View;
import android.os.Bundle;

public class MainActivity extends Activity {
  private static final String PREFS_FILE = "xxx";
  private static final String KEY_CHECKBOX = "cbx";

  public CheckBox mCheckBox;
  public SharedPreferences mSharedPreferences;
  public Editor mEditor;

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

    mCheckBox = (CheckBox) findViewById(R.id.checkBox);
  }
}

1 Answer

Kourosh Raeen
Kourosh Raeen
23,732 Points

The type of mEditor should be SharedPreferences.Editor:

public SharedPreferences.Editor mEditor;

Also, initialize both mSharedPreferences and mEditor in onCreate().