68 lines
2.4 KiB
Java
68 lines
2.4 KiB
Java
/* Copyright (C) 2015-2017 Carsten Pfeiffer
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by 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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Gadgetbridge 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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.activities;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentStatePagerAdapter;
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import android.view.ViewGroup;
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import java.util.HashSet;
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import java.util.Set;
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public abstract class AbstractFragmentPagerAdapter extends FragmentStatePagerAdapter {
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private final Set<AbstractGBFragment> fragments = new HashSet<>();
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private Object primaryFragment;
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public AbstractFragmentPagerAdapter(FragmentManager fm) {
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super(fm);
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}
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@Override
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public Object instantiateItem(ViewGroup container, int position) {
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Object fragment = super.instantiateItem(container, position);
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if (fragment instanceof AbstractGBFragment) {
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fragments.add((AbstractGBFragment) fragment);
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}
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return fragment;
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}
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@Override
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public void destroyItem(ViewGroup container, int position, Object object) {
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super.destroyItem(container, position, object);
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fragments.remove(object);
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}
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@Override
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public void setPrimaryItem(ViewGroup container, int position, Object object) {
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super.setPrimaryItem(container, position, object);
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if (object != primaryFragment) {
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primaryFragment = object;
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setCurrentFragment(primaryFragment);
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}
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}
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private void setCurrentFragment(Object newCurrentFragment) {
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for (AbstractGBFragment frag : fragments) {
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if (frag != newCurrentFragment) {
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frag.onMadeInvisibleInActivity();
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} else {
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frag.onMadeVisibleInActivityInternal();
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}
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}
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}
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}
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