Java tutorial
/* * Firetweet - Twitter client for Android * * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.getlantern.firetweet.fragment.support; import android.app.ActionBar; import android.app.Activity; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Intent; import android.graphics.Rect; import android.os.Bundle; import android.provider.SearchRecentSuggestions; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import org.getlantern.firetweet.R; import org.getlantern.firetweet.activity.iface.IControlBarActivity; import org.getlantern.firetweet.activity.iface.IControlBarActivity.ControlBarOffsetListener; import org.getlantern.firetweet.activity.support.ComposeActivity; import org.getlantern.firetweet.activity.support.LinkHandlerActivity; import org.getlantern.firetweet.adapter.support.SupportTabsAdapter; import org.getlantern.firetweet.fragment.iface.IBaseFragment.SystemWindowsInsetsCallback; import org.getlantern.firetweet.fragment.iface.RefreshScrollTopInterface; import org.getlantern.firetweet.fragment.iface.SupportFragmentCallback; import org.getlantern.firetweet.graphic.EmptyDrawable; import org.getlantern.firetweet.provider.RecentSearchProvider; import org.getlantern.firetweet.provider.FiretweetDataStore.SearchHistory; import org.getlantern.firetweet.util.AsyncTwitterWrapper; import org.getlantern.firetweet.util.ThemeUtils; import org.getlantern.firetweet.util.Utils; import org.getlantern.firetweet.view.TabPagerIndicator; public class SearchFragment extends BaseSupportFragment implements RefreshScrollTopInterface, SupportFragmentCallback, SystemWindowsInsetsCallback, ControlBarOffsetListener, OnPageChangeListener { private ViewPager mViewPager; private View mPagerWindowOverlay; private SupportTabsAdapter mAdapter; private TabPagerIndicator mPagerIndicator; private Fragment mCurrentVisibleFragment; private int mControlBarOffsetPixels; private int mControlBarHeight; @Override public void onAttach(Activity activity) { super.onAttach(activity); if (activity instanceof IControlBarActivity) { ((IControlBarActivity) activity).registerControlBarOffsetListener(this); } } @Override public void onDetach() { final FragmentActivity activity = getActivity(); if (activity instanceof IControlBarActivity) { ((IControlBarActivity) activity).unregisterControlBarOffsetListener(this); } super.onDetach(); } @Override public void onControlBarOffsetChanged(IControlBarActivity activity, float offset) { mControlBarHeight = activity.getControlBarHeight(); mControlBarOffsetPixels = Math.round(mControlBarHeight * (1 - offset)); updateTabOffset(); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { } @Override public void onPageScrollStateChanged(int state) { final FragmentActivity activity = getActivity(); if (activity instanceof LinkHandlerActivity) { ((LinkHandlerActivity) activity).setControlBarVisibleAnimate(true); } } private void updateTabOffset() { final int controlBarHeight = getControlBarHeight(); final int translationY = controlBarHeight - mControlBarOffsetPixels; final FragmentActivity activity = getActivity(); if (activity instanceof LinkHandlerActivity) { final View view = activity.getWindow().findViewById(android.support.v7.appcompat.R.id.action_bar); if (view != null && controlBarHeight != 0) { view.setAlpha(translationY / (float) controlBarHeight); } } mPagerIndicator.setTranslationY(translationY); mPagerWindowOverlay.setTranslationY(translationY); } private int getControlBarHeight() { final FragmentActivity activity = getActivity(); final int controlBarHeight; if (activity instanceof LinkHandlerActivity) { controlBarHeight = ((LinkHandlerActivity) activity).getControlBarHeight(); } else { controlBarHeight = mControlBarHeight; } if (controlBarHeight == 0) { return Utils.getActionBarHeight(activity); } return controlBarHeight; } @Override protected void fitSystemWindows(Rect insets) { super.fitSystemWindows(insets); final View view = getView(); if (view != null) { final int top = Utils.getInsetsTopWithoutActionBarHeight(getActivity(), insets.top); view.setPadding(insets.left, top, insets.right, insets.bottom); } updateTabOffset(); } @Override public Fragment getCurrentVisibleFragment() { return mCurrentVisibleFragment; } public void hideIndicator() { } @Override public void onActivityCreated(final Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setHasOptionsMenu(true); final Bundle args = getArguments(); final FragmentActivity activity = getActivity(); mAdapter = new SupportTabsAdapter(activity, getChildFragmentManager(), null, 1); mAdapter.addTab(StatusesSearchFragment.class, args, getString(R.string.statuses), R.drawable.ic_action_twitter, 0, null); mAdapter.addTab(SearchUsersFragment.class, args, getString(R.string.users), R.drawable.ic_action_user, 1, null); mViewPager.setAdapter(mAdapter); mViewPager.setOffscreenPageLimit(2); mPagerIndicator.setViewPager(mViewPager); mPagerIndicator.setTabDisplayOption(TabPagerIndicator.LABEL); mPagerIndicator.setOnPageChangeListener(this); ThemeUtils.initPagerIndicatorAsActionBarTab(activity, mPagerIndicator); ThemeUtils.setCompatToolbarOverlay(activity, new EmptyDrawable()); if (savedInstanceState == null && args != null && args.containsKey(EXTRA_QUERY)) { final String query = args.getString(EXTRA_QUERY); final SearchRecentSuggestions suggestions = new SearchRecentSuggestions(getActivity(), RecentSearchProvider.AUTHORITY, RecentSearchProvider.MODE); suggestions.saveRecentQuery(query, null); final ContentResolver cr = getContentResolver(); final ContentValues values = new ContentValues(); values.put(SearchHistory.QUERY, query); cr.insert(SearchHistory.CONTENT_URI, values); if (activity instanceof LinkHandlerActivity) { final ActionBar ab = activity.getActionBar(); if (ab != null) { ab.setSubtitle(query); } } } updateTabOffset(); } public String getQuery() { return getArguments().getString(EXTRA_QUERY); } public long getAccountId() { return getArguments().getLong(EXTRA_ACCOUNT_ID); } @Override public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) { inflater.inflate(R.menu.menu_search, menu); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_content_pages, container, false); } @Override public void onDetachFragment(final Fragment fragment) { } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case MENU_SAVE: { final AsyncTwitterWrapper twitter = getTwitterWrapper(); final Bundle args = getArguments(); if (twitter != null && args != null) { twitter.createSavedSearchAsync(getAccountId(), getQuery()); } return true; } case MENU_COMPOSE: { final Intent intent = new Intent(getActivity(), ComposeActivity.class); intent.setAction(INTENT_ACTION_COMPOSE); intent.putExtra(Intent.EXTRA_TEXT, String.format("#%s ", getQuery())); intent.putExtra(EXTRA_ACCOUNT_ID, getAccountId()); startActivity(intent); break; } } return super.onOptionsItemSelected(item); } @Override public void onPrepareOptionsMenu(Menu menu) { final MenuItem item = menu.findItem(MENU_COMPOSE); item.setTitle(getString(R.string.tweet_hashtag, getQuery())); } @Override public void onSetUserVisibleHint(final Fragment fragment, final boolean isVisibleToUser) { if (isVisibleToUser) { mCurrentVisibleFragment = fragment; } } @Override public void onBaseViewCreated(final View view, final Bundle savedInstanceState) { super.onBaseViewCreated(view, savedInstanceState); mViewPager = (ViewPager) view.findViewById(R.id.view_pager); mPagerWindowOverlay = view.findViewById(R.id.pager_window_overlay); mPagerIndicator = (TabPagerIndicator) view.findViewById(R.id.view_pager_tabs); } @Override public boolean scrollToStart() { if (!(mCurrentVisibleFragment instanceof RefreshScrollTopInterface)) return false; ((RefreshScrollTopInterface) mCurrentVisibleFragment).scrollToStart(); return true; } @Override public boolean triggerRefresh() { if (!(mCurrentVisibleFragment instanceof RefreshScrollTopInterface)) return false; ((RefreshScrollTopInterface) mCurrentVisibleFragment).triggerRefresh(); return true; } @Override public boolean triggerRefresh(final int position) { return false; } @Override public boolean getSystemWindowsInsets(Rect insets) { if (mPagerIndicator == null) return false; final FragmentActivity activity = getActivity(); if (activity instanceof LinkHandlerActivity) { ((LinkHandlerActivity) activity).getSystemWindowsInsets(insets); insets.top = mPagerIndicator.getHeight() + getControlBarHeight(); return true; } return false; } }