Differences Between Methods apply( and commit boolean commit o Returns a boolean value to indicate if the new values were successfully written to persistent storage o Writes its preferences out to persistent storage synchronously (can block the Ul thread) void apply o Commits its changes to the in-memory SharedPreferences immediately but starts an asynchronous commit to disk o does not block the UI thread, but you wont be notified of any failures Use apply( if you don t care about the return value and you're using this from your application's Ul thread http://developer.androidcom/referencelandroid/content/sharedPreferences.Editorhtml
Differences Between Methods apply() and commit() • boolean commit() o Returns a boolean value to indicate if the new values were successfully written to persistent storage. o Writes its preferences out to persistent storage synchronously (can block the UI thread) • void apply() o Commits its changes to the in-memory SharedPreferences immediately but starts an asynchronous commit to disk. o does not block the UI thread, but you won’t be notified of any failures. Use apply() if you don't care about the return value and you’re using this from your application’s UI thread. http://developer.android.com/reference/android/content/SharedPreferences.Editor.html 16
public class Example extends Activity t Create a preference file with the name specified public static final String PREFS NAME "MyPrefs file"i @Override protected void onCreate( Bundle state)[ super onCreate (state); / Restore the preferences / Get the preference with the name specified SharedPreferences settings getsharedPreferences( PREFS NAME, 0)j / Read the stored data from the preference int data ttings getInt(key", defaultvalue; protected void onStop(t super. onstop o; // Store the preferences // We need an Editor object to make preference changes SharedPreferences settings= getsharedPreferences(PreFs NAME, 0) SharedPreferences Editor editor settings edito editor. putInt ("key,, value); // Commit the edits! editor. commit 17
17 public class Example extends Activity { // Create a preference file with the name specified public static final String PREFS_NAME = "MyPrefsFile"; @Override protected void onCreate(Bundle state){ super.onCreate(state); . . . // Restore the preferences // Get the preference with the name specified SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); // Read the stored data from the preference int data = settings.getInt(“key", defaultValue); . . . } @Override protected void onStop(){ super.onStop(); // Store the preferences // We need an Editor object to make preference changes. SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); SharedPreferences.Editor editor = settings.edit(); editor.putInt(“key”, value); // Commit the edits! editor.commit(); } }