301 lines
10 KiB
Java
301 lines
10 KiB
Java
/*
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This file is part of Subsonic.
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Subsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Subsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2014 (C) Scott Jackson
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*/
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package net.nullsum.audinaut.fragments;
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import android.app.Activity;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.preference.Preference;
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import android.preference.PreferenceManager;
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import android.preference.PreferenceScreen;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ListView;
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import net.nullsum.audinaut.R;
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import net.nullsum.audinaut.util.Constants;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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public abstract class PreferenceCompatFragment extends SubsonicFragment {
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private static final int FIRST_REQUEST_CODE = 100;
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private static final int MSG_BIND_PREFERENCES = 1;
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private static final String PREFERENCES_TAG = "android:preferences";
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private boolean mHavePrefs;
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private boolean mInitDone;
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private ListView mList;
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final private Runnable mRequestFocus = new Runnable() {
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public void run() {
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mList.focusableViewAvailable(mList);
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}
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};
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private PreferenceManager mPreferenceManager;
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private final Handler mHandler = new Handler() {
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case MSG_BIND_PREFERENCES:
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bindPreferences();
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break;
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}
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}
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};
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private void bindPreferences() {
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PreferenceScreen localPreferenceScreen = getPreferenceScreen();
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if (localPreferenceScreen != null) {
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ListView localListView = getListView();
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localPreferenceScreen.bind(localListView);
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}
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}
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private void ensureList() {
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if (mList == null) {
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View view = getView();
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if (view == null) {
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throw new IllegalStateException("Content view not yet created");
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}
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View listView = view.findViewById(android.R.id.list);
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if (!(listView instanceof ListView)) {
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throw new RuntimeException("Content has view with id attribute 'android.R.id.list' that is not a ListView class");
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}
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mList = (ListView) listView;
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if (mList == null) {
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throw new RuntimeException("Your content must have a ListView whose id attribute is 'android.R.id.list'");
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}
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mHandler.post(mRequestFocus);
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}
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}
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private void postBindPreferences() {
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if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) {
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mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget();
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}
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}
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private void requirePreferenceManager() {
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if (this.mPreferenceManager == null) {
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throw new RuntimeException("This should be called after super.onCreate.");
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}
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}
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private PreferenceScreen addPreferencesFromResource(int resId) {
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requirePreferenceManager();
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PreferenceScreen screen = inflateFromResource(getActivity(), resId, getPreferenceScreen());
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setPreferenceScreen(screen);
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for (int i = 0; i < screen.getPreferenceCount(); i++) {
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Preference preference = screen.getPreference(i);
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if (preference instanceof PreferenceScreen && preference.getKey() != null) {
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preference.setOnPreferenceClickListener(preference1 -> {
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onStartNewFragment(preference1.getKey());
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return false;
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});
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}
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}
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return screen;
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}
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Preference findPreference(CharSequence key) {
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if (mPreferenceManager == null) {
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return null;
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}
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return mPreferenceManager.findPreference(key);
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}
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private ListView getListView() {
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ensureList();
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return mList;
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}
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PreferenceManager getPreferenceManager() {
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return mPreferenceManager;
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}
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@Override
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public void onActivityCreated(Bundle savedInstanceState) {
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super.onActivityCreated(savedInstanceState);
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getListView().setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
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if (mHavePrefs) {
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bindPreferences();
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}
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mInitDone = true;
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if (savedInstanceState != null) {
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Bundle localBundle = savedInstanceState.getBundle(PREFERENCES_TAG);
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if (localBundle != null) {
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PreferenceScreen screen = getPreferenceScreen();
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if (screen != null) {
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screen.restoreHierarchyState(localBundle);
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}
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}
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}
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}
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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super.onActivityResult(requestCode, resultCode, data);
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dispatchActivityResult(requestCode, resultCode, data);
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}
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@Override
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public void onCreate(Bundle paramBundle) {
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super.onCreate(paramBundle);
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mPreferenceManager = createPreferenceManager();
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int res = this.getArguments().getInt(Constants.INTENT_EXTRA_FRAGMENT_TYPE, 0);
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if (res != 0) {
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PreferenceScreen preferenceScreen = addPreferencesFromResource(res);
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onInitPreferences(preferenceScreen);
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}
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}
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@Override
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public View onCreateView(LayoutInflater paramLayoutInflater, ViewGroup paramViewGroup, Bundle paramBundle) {
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return paramLayoutInflater.inflate(R.layout.preferences, paramViewGroup, false);
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}
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@Override
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public void onDestroy() {
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super.onDestroy();
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dispatchActivityDestroy();
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}
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@Override
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public void onDestroyView() {
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mList = null;
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mHandler.removeCallbacks(mRequestFocus);
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mHandler.removeMessages(MSG_BIND_PREFERENCES);
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super.onDestroyView();
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}
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@Override
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public void onSaveInstanceState(Bundle bundle) {
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super.onSaveInstanceState(bundle);
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PreferenceScreen screen = getPreferenceScreen();
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if (screen != null) {
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Bundle localBundle = new Bundle();
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screen.saveHierarchyState(localBundle);
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bundle.putBundle(PREFERENCES_TAG, localBundle);
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}
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}
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@Override
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public void onStop() {
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super.onStop();
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dispatchActivityStop();
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}
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/**
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* Access methods with visibility private
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**/
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private PreferenceManager createPreferenceManager() {
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try {
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Constructor<PreferenceManager> c = PreferenceManager.class.getDeclaredConstructor(Activity.class, int.class);
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c.setAccessible(true);
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return c.newInstance(this.getActivity(), FIRST_REQUEST_CODE);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private PreferenceScreen getPreferenceScreen() {
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("getPreferenceScreen");
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m.setAccessible(true);
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return (PreferenceScreen) m.invoke(mPreferenceManager);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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void setPreferenceScreen(PreferenceScreen preferenceScreen) {
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("setPreferences", PreferenceScreen.class);
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m.setAccessible(true);
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boolean result = (Boolean) m.invoke(mPreferenceManager, preferenceScreen);
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if (result && preferenceScreen != null) {
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mHavePrefs = true;
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if (mInitDone) {
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postBindPreferences();
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}
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}
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private void dispatchActivityResult(int requestCode, int resultCode, Intent data) {
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityResult", int.class, int.class, Intent.class);
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m.setAccessible(true);
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m.invoke(mPreferenceManager, requestCode, resultCode, data);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private void dispatchActivityDestroy() {
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityDestroy");
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m.setAccessible(true);
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m.invoke(mPreferenceManager);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private void dispatchActivityStop() {
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityStop");
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m.setAccessible(true);
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m.invoke(mPreferenceManager);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private PreferenceScreen inflateFromResource(Context context, int resId, PreferenceScreen rootPreferences) {
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PreferenceScreen preferenceScreen;
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try {
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Method m = PreferenceManager.class.getDeclaredMethod("inflateFromResource", Context.class, int.class, PreferenceScreen.class);
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m.setAccessible(true);
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preferenceScreen = (PreferenceScreen) m.invoke(mPreferenceManager, context, resId, rootPreferences);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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return preferenceScreen;
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}
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protected abstract void onInitPreferences(PreferenceScreen preferenceScreen);
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protected abstract void onStartNewFragment(String name);
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}
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