PreferencesActivity.java
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 |
package com.DataManagement.PreferenceActivity; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class PreferencesActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Open a User Preferences Entry Activity final Button button = (Button) findViewById(R.id.check_pref_button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent( PreferencesActivity.this, ViewAndUpdatePreferencesActivity.class)); } }); } } |
ViewAndUpdatePreferencesActivity.java
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 |
package com.DataManagement.PreferenceActivity; import android.app.Activity; import android.content.SharedPreferences; import android.content.SharedPreferences.OnSharedPreferenceChangeListener; import android.os.Bundle; import android.preference.Preference; import android.preference.PreferenceFragment; public class ViewAndUpdatePreferencesActivity extends Activity { private static final String USERNAME = "uname"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.user_prefs_fragment); } // Fragment that displays the username preference public static class UserPreferenceFragment extends PreferenceFragment { protected static final String TAG = "UserPrefsFragment"; private OnSharedPreferenceChangeListener mListener; private Preference mUserNamePreference; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Load the preferences from an XML resource addPreferencesFromResource(R.xml.user_prefs); // Get the username Preference mUserNamePreference = (Preference) getPreferenceManager() .findPreference(USERNAME); // Attach a listener to update summary when username changes mListener = new OnSharedPreferenceChangeListener() { @Override public void onSharedPreferenceChanged( SharedPreferences sharedPreferences, String key) { mUserNamePreference.setSummary(sharedPreferences.getString( USERNAME, "None Set")); } }; // Get SharedPreferences object managed by the PreferenceManager for // this Fragment SharedPreferences prefs = getPreferenceManager() .getSharedPreferences(); // Register a listener on the SharedPreferences object prefs.registerOnSharedPreferenceChangeListener(mListener); // Invoke callback manually to display the current username mListener.onSharedPreferenceChanged(prefs, USERNAME); } } } |
main.xml
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:id="@+id/check_pref_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/view_username_string" android:textSize="24sp" android:padding="24dp" android:gravity="center" > </Button> </LinearLayout> |
user_prefs_fragment.xml
|
1 2 3 4 5 6 7 8 9 |
<?xml version="1.0" encoding="utf-8"?> <fragment xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" class="com.DataManagement.PreferenceActivity.ViewAndUpdatePreferencesActivity$UserPreferenceFragment" android:orientation="vertical" android:id="@+id/userPreferenceFragment"> </fragment> |