/*
* Copyright (C) 2013 Jorrit "Chainfire" Jongma
* Copyright (C) 2010 The Android Open Source Project
*
* (based on AOSP PreferenceFragment.java with some mods)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package eu.chainfire.geolog.ui;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.Preference;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.support.v4.app.ListFragment;
import android.view.View;
import android.widget.ListView;
public abstract class PreferenceListFragment extends ListFragment {
private PreferenceManager mPreferenceManager;
/**
* The starting request code given out to preference framework.
*/
private static final int FIRST_REQUEST_CODE = 100;
private static final int MSG_BIND_PREFERENCES = 0;
@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
private ListView lv = null;
private int xmlId;
public PreferenceListFragment(int xmlId){
this.xmlId = xmlId;
}
//must be provided
public PreferenceListFragment(){
}
@Override
public void onDestroyView(){
super.onDestroyView();
/*
* yada, breaks animation
* ViewParent p = lv.getParent();
if(p != null)
((ViewGroup)p).removeView(lv);
*/
}
@Override
public void onCreate(Bundle b) {
super.onCreate(b);
mPreferenceManager = onCreatePreferenceManager();
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
lv = getListView();
lv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
setListShown(true);
PreferenceScreen screen = createPreferenceHierarchy(mPreferenceManager);
if (screen != null) setPreferenceScreen(screen);
postBindPreferences();
//((OnPreferenceAttachedListener)getActivity()).onPreferenceAttached(getPreferenceScreen(), 0);
}
protected abstract PreferenceScreen createPreferenceHierarchy(PreferenceManager prefMan);
@Override
public void onStop(){
super.onStop();
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityStop");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
@Override
public void onDestroy() {
super.onDestroy();
lv = null;
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityDestroy");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt("xml", xmlId);
super.onSaveInstanceState(outState);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityResult", int.class, int.class, Intent.class);
m.setAccessible(true);
m.invoke(mPreferenceManager, requestCode, resultCode, data);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Posts a message to bind the preferences to the list view.
* <p>
* Binding late is preferred as any custom preference types created in
* {@link #onCreate(Bundle)} are able to have their views recycled.
*/
private void postBindPreferences() {
if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) return;
mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget();
}
private void bindPreferences() {
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
try {
if (lv == null) lv = getListView();
preferenceScreen.bind(lv);
} catch (Exception e) {
}
}
}
/**
* Creates the {@link PreferenceManager}.
*
* @return The {@link PreferenceManager} used by this activity.
*/
private PreferenceManager onCreatePreferenceManager() {
try{
Constructor<PreferenceManager> c = PreferenceManager.class.getDeclaredConstructor(Activity.class, int.class);
c.setAccessible(true);
PreferenceManager preferenceManager = c.newInstance(this.getActivity(), FIRST_REQUEST_CODE);
return preferenceManager;
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Returns the {@link PreferenceManager} used by this activity.
* @return The {@link PreferenceManager}.
*/
public PreferenceManager getPreferenceManager() {
return mPreferenceManager;
}
/**
* Sets the root of the preference hierarchy that this activity is showing.
*
* @param preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy.
*/
public void setPreferenceScreen(PreferenceScreen preferenceScreen){
try{
Method m = PreferenceManager.class.getDeclaredMethod("setPreferences", PreferenceScreen.class);
m.setAccessible(true);
boolean result = (Boolean) m.invoke(mPreferenceManager, preferenceScreen);
if (result && preferenceScreen != null) {
postBindPreferences();
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Gets the root of the preference hierarchy that this activity is showing.
*
* @return The {@link PreferenceScreen} that is the root of the preference
* hierarchy.
*/
public PreferenceScreen getPreferenceScreen(){
try{
Method m = PreferenceManager.class.getDeclaredMethod("getPreferenceScreen");
m.setAccessible(true);
return (PreferenceScreen) m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Adds preferences from activities that match the given {@link Intent}.
*
* @param intent The {@link Intent} to query activities.
*/
public void addPreferencesFromIntent(Intent intent) {
throw new RuntimeException("too lazy to include this bs");
}
/**
* Inflates the given XML resource and adds the preference hierarchy to the current
* preference hierarchy.
*
* @param preferencesResId The XML resource ID to inflate.
*/
public void addPreferencesFromResource(int preferencesResId) {
try{
Method m = PreferenceManager.class.getDeclaredMethod("inflateFromResource", Context.class, int.class, PreferenceScreen.class);
m.setAccessible(true);
PreferenceScreen prefScreen = (PreferenceScreen) m.invoke(mPreferenceManager, getActivity(), preferencesResId, getPreferenceScreen());
setPreferenceScreen(prefScreen);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Finds a {@link Preference} based on its key.
*
* @param key The key of the preference to retrieve.
* @return The {@link Preference} with the key, or null.
* @see PreferenceGroup#findPreference(CharSequence)
*/
public Preference findPreference(CharSequence key) {
if (mPreferenceManager == null) {
return null;
}
return mPreferenceManager.findPreference(key);
}
public interface OnPreferenceAttachedListener {
public void onPreferenceAttached(PreferenceScreen root, int xmlId);
}
}