org.solovyev.android.messenger.preferences.PreferenceListFragment.java Source code

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Here is the source code for org.solovyev.android.messenger.preferences.PreferenceListFragment.java

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/*
 * Copyright 2013 serso aka se.solovyev
 *
 * 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 org.solovyev.android.messenger.preferences;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.support.v4.app.ListFragment;
import android.view.*;
import android.widget.ListView;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class PreferenceListFragment extends ListFragment {

    private static final int NO_THEME = -1;

    public static final String FRAGMENT_TAG = "preferences";

    private static final String ARG_PREFERENCES_RES_ID = "preferences_res_id";
    private static final String ARG_LAYOUT_RES_ID = "layout_res_id";
    private static final String ARG_THEME_RES_ID = "theme_res_id";

    private PreferenceManagerCompat preferenceManager;

    private View root;

    private int preferencesResId;

    private int layoutResId;

    private int themeResId = NO_THEME;
    private Context themeContext;

    //must be provided
    public PreferenceListFragment() {
    }

    @Nonnull
    public static Bundle newPreferencesArguments(int preferencesResId, int layoutResId, int themeResId) {
        final Bundle args = new Bundle();

        args.putInt(ARG_PREFERENCES_RES_ID, preferencesResId);
        args.putInt(ARG_LAYOUT_RES_ID, layoutResId);
        args.putInt(ARG_THEME_RES_ID, themeResId);

        return args;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        preferenceManager = new PreferenceManagerCompat(this);

        final Bundle arguments = getArguments();
        preferencesResId = arguments.getInt(ARG_PREFERENCES_RES_ID);
        layoutResId = arguments.getInt(ARG_LAYOUT_RES_ID);
        themeResId = arguments.getInt(ARG_THEME_RES_ID);
    }

    protected void prepareListView(@Nonnull ListView lv) {
        lv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    }

    @Override
    public final View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        final LayoutInflater themeInflater;

        if (themeResId == NO_THEME) {
            themeContext = getActivity();
            themeInflater = inflater;
        } else {
            themeContext = new ContextThemeWrapper(getActivity(), themeResId);
            themeInflater = LayoutInflater.from(themeContext);
        }

        root = themeInflater.inflate(layoutResId, null);

        final ListView lv = (ListView) root.findViewById(android.R.id.list);
        prepareListView(lv);

        onCreateView(themeContext, themeInflater, root, container, savedInstanceState);

        return root;
    }

    protected void onCreateView(@Nonnull Context context, @Nonnull LayoutInflater inflater, @Nonnull View root,
            @Nullable ViewGroup container, @Nullable Bundle b) {
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        preferenceManager.addPreferencesFromResource(preferencesResId, themeContext);
        preferenceManager.postBindPreferences();

        final Activity activity = getActivity();
        if (activity instanceof OnPreferenceAttachedListener) {
            final PreferenceScreen preferenceScreen = preferenceManager.getPreferenceScreen();
            if (preferenceScreen != null) {
                ((OnPreferenceAttachedListener) activity).onPreferenceAttached(preferenceScreen, preferencesResId);
            }
        }
    }

    @Nullable
    public PreferenceScreen getPreferenceScreen() {
        return preferenceManager.getPreferenceScreen();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        final ViewParent rootParent = root.getParent();
        if (rootParent != null) {
            ((ViewGroup) rootParent).removeView(root);
        }
    }

    @Override
    public void onPause() {
        preferenceManager.onPause();
        super.onPause();
    }

    @Override
    public void onStop() {
        preferenceManager.onStop();
        super.onStop();
    }

    @Override
    public void onDestroy() {
        root = null;
        preferenceManager.onDestroy();
        super.onDestroy();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        preferenceManager.onActivityResult(requestCode, resultCode, data);
    }

    /**
     * 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");
    }

    /**
     * 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 android.preference.PreferenceGroup#findPreference(CharSequence)
     */
    public Preference findPreference(CharSequence key) {
        return preferenceManager.findPreference(key);
    }

    public interface OnPreferenceAttachedListener {
        public void onPreferenceAttached(PreferenceScreen preferenceScreen, int preferenceResId);
    }

    public int getPreferencesResId() {
        return preferencesResId;
    }
}