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POHow retrieve selected from preferenceActivity
 

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  1. POHow retrieve selected from preferenceActivity
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    <p>(Android 2.2) </p> <p>I'm trying to retrieve a value set in a PreferenceActivity. Although the value is correctly stored/recalled by the activity itself, I cannot figure out how to retrieve the set value by myself (to show it in a textView for instance). This code doesn't give an error however the value 0 is shown in textView1 in Spel.java instead of the actual / current value in PrefsManager prefs (in NumberPickerPreferenceActivity). </p> <p>How to make the correct value show in textView1 there?</p> <p>Also: onSharedPreferenceChanged (in NumberPickerPreferenceActivity) doesn't show a toast messsage (nothing pops up, nothing is logged). What is wrong, how to solve?</p> <p>Here's class NumberPickerPreferenceActivity:</p> <pre><code>package mypackage.tabnavui; import mypackage.R; import android.content.SharedPreferences; import android.content.SharedPreferences.OnSharedPreferenceChangeListener; import android.os.Bundle; import android.preference.PreferenceActivity; import android.preference.PreferenceManager; import android.util.Log; import android.widget.Toast; public class NumberPickerPreferenceActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener { private static final String TAG = NumberPickerPreferenceActivity.class.getSimpleName(); private SharedPreferences prefs; public static int aantalBanen; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); PreferenceManager preferenceManager = getPreferenceManager(); preferenceManager.setSharedPreferencesMode(MODE_PRIVATE); preferenceManager.setSharedPreferencesName("numberPicker.preferences"); addPreferencesFromResource(R.xml.preferences); prefs = PreferenceManager.getDefaultSharedPreferences(this); } public int prefsAantalBanen() { prefs = PreferenceManager.getDefaultSharedPreferences(this); return prefs.getInt( "AANTAL_BANEN", 0 ); } public int getAantalBanen() { aantalBanen = prefsAantalBanen(); return aantalBanen; } @Override protected void onResume() { super.onResume(); prefs.registerOnSharedPreferenceChangeListener(this); } @Override protected void onPause() { super.onPause(); prefs.unregisterOnSharedPreferenceChangeListener(this); } @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { int selectedNumber = prefsAantalBanen(); Log.d(TAG, "Number selected: " + selectedNumber); Toast t = Toast.makeText(this, "Number selected: " + selectedNumber, Toast.LENGTH_SHORT); t.show(); } } </code></pre> <p>Here's Spel.java where I want to show the value as selected / stored in the ReferenceActivity, see method toonClickHandler:</p> <pre><code> package mypackage.tabnavui; import mypackage.tabnavui.R; import mypackage.Controls2.MyGestureDetector; import android.app.Activity; import android.app.ListActivity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.GestureDetector; import android.view.Menu; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.GestureDetector.SimpleOnGestureListener; import android.view.ViewGroup.LayoutParams; import android.widget.ArrayAdapter; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ImageView; import android.widget.AbsListView; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; public class Spel extends Activity implements NumberPickerDialog.OnNumberSetListener { private static final String TAG = Spel.class.getSimpleName(); private GestureDetector gestureDetector; private TextView textView1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); gestureDetector = new GestureDetector(new MyGestureDetector()); // Use a custom layout file setContentView(R.layout.spel); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_sample_picker, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.menu_dialog_item) { NumberPickerDialog dialog = new NumberPickerDialog(this, -1, 2); dialog.setTitle(getString(R.string.dialog_picker_title)); dialog.setOnNumberSetListener(this); dialog.show(); return true; } else if (item.getItemId() == R.id.menu_preferences_item) { startActivity(new Intent(this, NumberPickerPreferenceActivity.class)); return true; } return super.onOptionsItemSelected(item); } public void toonClickHandler(View v) { textView1 = (TextView) this.findViewById(R.id.textView1); int aantalBanen = NumberPickerPreferenceActivity.aantalBanen; textView1.setText(String.valueOf(aantalBanen)); } public void onNumberSet(int number) { Log.d(TAG, "Number selected: " + number); Toast t = Toast.makeText(this, "Number selected: " + number, Toast.LENGTH_SHORT); t.show(); } @Override public boolean onTouchEvent(MotionEvent event) { return gestureDetector.onTouchEvent(event); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right); } class MyGestureDetector extends SimpleOnGestureListener { private static final int SWIPE_MAX_OFF_PATH = 200; private static final int SWIPE_MIN_DISTANCE = 50; private static final int SWIPE_THRESHOLD_VELOCITY = 200; @Override public boolean onDown (MotionEvent e) { return true; } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (Math.abs(e1.getY() - e2.getY()) &gt; SWIPE_MAX_OFF_PATH) return false; // left to right swipe and right to left swipe if (e1.getX() - e2.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY) { // left swipe Toast t = Toast.makeText(Spel.this, "Left swipe", Toast.LENGTH_LONG); t.show(); // startActivity(Tabs3.tab3); startActivityForResult(Tabs3.tab3, 500); overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left); return true; } else if (e2.getX() - e1.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY) { // right swipe Toast t = Toast.makeText(Spel.this, "Right swipe", Toast.LENGTH_LONG); t.show(); // startActivity(Tabs3.tab1); startActivityForResult(Tabs3.tab1, 500); overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right); return true; } return false; } } } </code></pre> <p>and preferences.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;PreferenceScreen xmlns:picker="http://schemas.android.com/apk/res/mypackage.tabnavui" xmlns:android="http://schemas.android.com/apk/res/android"&gt; &lt;nl.computerhuys.tabnavui.NumberPickerPreference android:key="AANTAL_BANEN" android:title="Aantal banen" android:summary="Number picker as a preference" picker:defaultValue="2" picker:startRange="0" picker:endRange="12" /&gt; &lt;/PreferenceScreen&gt; </code></pre>
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