Java tutorial
/** * FeedEx * * Copyright (c) 2012-2013 Frederic Julian * * 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 com.app.uafeed.activity; import android.app.LoaderManager; import android.content.CursorLoader; import android.content.Intent; import android.content.Loader; import android.content.SharedPreferences; import android.content.res.Configuration; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import android.widget.Toast; import com.app.uafeed.AboutActivity; import com.app.uafeed.Account; import com.app.uafeed.Const; import com.app.uafeed.Constants; import com.app.uafeed.MainActivity; import com.app.uafeed.MainApplication; import com.app.feedle.ProjectsActivity; import com.feedleit.uafeednews.R; import com.app.uafeed.adapter.DrawerAdapter; import com.app.uafeed.api.Api; import com.app.uafeed.fragment.EntriesListFragment; import com.app.uafeed.provider.FeedData; import com.app.uafeed.provider.FeedData.EntryColumns; import com.app.uafeed.provider.FeedData.FeedColumns; import com.app.uafeed.service.FetcherService; import com.app.uafeed.service.RefreshService; import com.app.uafeed.utils.PrefUtils; import com.app.uafeed.utils.UiUtils; public class HomeActivity extends BaseActivity implements LoaderManager.LoaderCallbacks<Cursor> { Account account = new Account(); Api api; private static final String STATE_CURRENT_DRAWER_POS = "STATE_CURRENT_DRAWER_POS"; private static final String FEED_UNREAD_NUMBER = new StringBuilder("(SELECT COUNT(*) FROM ") .append(EntryColumns.TABLE_NAME).append(" WHERE ").append(EntryColumns.IS_READ).append(" IS NULL AND ") .append(EntryColumns.FEED_ID).append('=').append(FeedColumns.TABLE_NAME).append('.') .append(FeedColumns._ID).append(')').toString(); private static final String WHERE_UNREAD_ONLY = new StringBuilder("(SELECT COUNT(*) FROM ") .append(EntryColumns.TABLE_NAME).append(" WHERE ").append(EntryColumns.IS_READ).append(" IS NULL AND ") .append(EntryColumns.FEED_ID).append("=").append(FeedColumns.TABLE_NAME).append('.') .append(FeedColumns._ID).append(") > 0").append(" OR (").append(FeedColumns.IS_GROUP) .append("=1 AND (SELECT COUNT(*) FROM ").append(FeedData.ENTRIES_TABLE_WITH_FEED_INFO).append(" WHERE ") .append(EntryColumns.IS_READ).append(" IS NULL AND ").append(FeedColumns.GROUP_ID).append('=') .append(FeedColumns.TABLE_NAME).append('.').append(FeedColumns._ID).append(") > 0)").toString(); private static final int LOADER_ID = 0; private final SharedPreferences.OnSharedPreferenceChangeListener isRefreshingListener = new SharedPreferences.OnSharedPreferenceChangeListener() { @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { if (PrefUtils.IS_REFRESHING.equals(key)) { getProgressBar().setVisibility( PrefUtils.getBoolean(PrefUtils.IS_REFRESHING, false) ? View.VISIBLE : View.GONE); } if (PrefUtils.SHOW_READ.equals(key)) { getLoaderManager().restartLoader(LOADER_ID, null, HomeActivity.this); } } }; private EntriesListFragment mEntriesFragment; private DrawerLayout mDrawerLayout; private ListView mDrawerList; private DrawerAdapter mDrawerAdapter; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mTitle; private BitmapDrawable mIcon; private int mCurrentDrawerPos; private boolean mIsDrawerMoving = false; private boolean mCanQuit = false; @Override protected void onCreate(Bundle savedInstanceState) { UiUtils.setPreferenceTheme(this); super.onCreate(savedInstanceState); // account.restore(this); setContentView(R.layout.activity_home); mEntriesFragment = (EntriesListFragment) getFragmentManager().findFragmentById(R.id.entries_list_fragment); mTitle = getTitle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); mDrawerList.setChoiceMode(ListView.CHOICE_MODE_SINGLE); mDrawerList.setOnItemClickListener(new ListView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectDrawerItem(position); mDrawerLayout.postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.closeDrawer(mDrawerList); } }, 50); } }); mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) { @Override public void onDrawerStateChanged(int newState) { if (mIsDrawerMoving && newState == DrawerLayout.STATE_IDLE) { mIsDrawerMoving = false; invalidateOptionsMenu(); } else if (!mIsDrawerMoving) { mIsDrawerMoving = true; invalidateOptionsMenu(); } super.onDrawerStateChanged(newState); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState != null) { mCurrentDrawerPos = savedInstanceState.getInt(STATE_CURRENT_DRAWER_POS); } getLoaderManager().initLoader(LOADER_ID, null, this); if (PrefUtils.getBoolean(PrefUtils.REFRESH_ENABLED, true)) { // starts the service independent to this activity startService(new Intent(this, RefreshService.class)); } else { stopService(new Intent(this, RefreshService.class)); } if (PrefUtils.getBoolean(PrefUtils.REFRESH_ON_OPEN_ENABLED, false)) { if (!PrefUtils.getBoolean(PrefUtils.IS_REFRESHING, false)) { startService(new Intent(HomeActivity.this, FetcherService.class) .setAction(FetcherService.ACTION_REFRESH_FEEDS)); } } } private void refreshTitleAndIcon() { getActionBar().setTitle(mTitle); switch (mCurrentDrawerPos) { case 0: getActionBar().setTitle(R.string.all); getActionBar().setIcon(R.drawable.ic_statusbar_rss); break; case 1: getActionBar().setTitle(R.string.favorites); getActionBar().setIcon(R.drawable.dimmed_rating_important); break; case 2: getActionBar().setTitle(android.R.string.search_go); getActionBar().setIcon(R.drawable.action_search); break; default: getActionBar().setTitle(mTitle); if (mIcon != null) { getActionBar().setIcon(mIcon); } break; } } @Override protected void onSaveInstanceState(Bundle outState) { outState.putInt(STATE_CURRENT_DRAWER_POS, mCurrentDrawerPos); super.onSaveInstanceState(outState); } @Override protected void onResume() { super.onResume(); getProgressBar() .setVisibility(PrefUtils.getBoolean(PrefUtils.IS_REFRESHING, false) ? View.VISIBLE : View.GONE); PrefUtils.registerOnPrefChangeListener(isRefreshingListener); } @Override protected void onPause() { PrefUtils.unregisterOnPrefChangeListener(isRefreshingListener); super.onPause(); } @Override public void finish() { if (mCanQuit) { super.finish(); return; } Toast.makeText(this, R.string.back_again_to_quit, Toast.LENGTH_SHORT).show(); mCanQuit = true; new Handler().postDelayed(new Runnable() { @Override public void run() { mCanQuit = false; } }, 3000); } @Override public boolean onCreateOptionsMenu(Menu menu) { boolean isOpened = mDrawerLayout.isDrawerOpen(mDrawerList); if (isOpened && !mIsDrawerMoving || !isOpened && mIsDrawerMoving) { getActionBar().setTitle(R.string.app_name); getActionBar().setIcon(R.drawable.icon); MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.drawer, menu); if (!PrefUtils.getBoolean(PrefUtils.SHOW_READ, true)) { menu.findItem(R.id.menu_hide_read_main).setTitle(R.string.context_menu_show_read) .setIcon(R.drawable.view_reads); } mEntriesFragment.setHasOptionsMenu(false); } else { refreshTitleAndIcon(); mEntriesFragment.setHasOptionsMenu(true); } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (mDrawerToggle.onOptionsItemSelected(item)) { // return true; } switch (item.getItemId()) { case R.id.menu_hide_read_main: if (!PrefUtils.getBoolean(PrefUtils.SHOW_READ, true)) { PrefUtils.putBoolean(PrefUtils.SHOW_READ, true); item.setTitle(R.string.context_menu_hide_read).setIcon(R.drawable.hide_reads); } else { PrefUtils.putBoolean(PrefUtils.SHOW_READ, false); item.setTitle(R.string.context_menu_show_read).setIcon(R.drawable.view_reads); } return true; /*case R.id.menu_edit: startActivity(new Intent(this, EditFeedsListActivity.class)); return true; */ case R.id.menu_refresh_main: if (!PrefUtils.getBoolean(PrefUtils.IS_REFRESHING, false)) { MainApplication.getContext() .startService(new Intent(MainApplication.getContext(), FetcherService.class) .setAction(FetcherService.ACTION_REFRESH_FEEDS)); } return true; case R.id.menu_settings_main: //startActivity(new Intent(this, GeneralPrefsActivity.class)); startActivity(new Intent(this, ProjectsActivity.class)); return true; case R.id.menu_about_main: startActivity(new Intent(this, AboutActivity.class)); return true; default: return super.onOptionsItemSelected(item); } } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mDrawerToggle.onConfigurationChanged(newConfig); } @Override public Loader<Cursor> onCreateLoader(int i, Bundle bundle) { CursorLoader cursorLoader = new CursorLoader(this, FeedColumns.GROUPED_FEEDS_CONTENT_URI, new String[] { FeedColumns._ID, FeedColumns.URL, FeedColumns.NAME, FeedColumns.IS_GROUP, FeedColumns.GROUP_ID, FeedColumns.ICON, FeedColumns.LAST_UPDATE, FeedColumns.ERROR, FEED_UNREAD_NUMBER }, PrefUtils.getBoolean(PrefUtils.SHOW_READ, true) ? "" : WHERE_UNREAD_ONLY, null, null); cursorLoader.setUpdateThrottle(Constants.UPDATE_THROTTLE_DELAY); return cursorLoader; } @Override public void onLoaderReset(Loader<Cursor> cursorLoader) { mDrawerAdapter.setCursor(null); } @Override public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) { if (mDrawerAdapter != null) { mDrawerAdapter.setCursor(cursor); } else { mDrawerAdapter = new DrawerAdapter(this, cursor); mDrawerList.setAdapter(mDrawerAdapter); // We don't have any menu yet, we need to display it mDrawerList.post(new Runnable() { @Override public void run() { selectDrawerItem(mCurrentDrawerPos); refreshTitleAndIcon(); } }); } } private void selectDrawerItem(int position) { mCurrentDrawerPos = position; mIcon = null; Uri newUri; boolean showFeedInfo = true; switch (position) { case 0: newUri = EntryColumns.ALL_ENTRIES_CONTENT_URI; break; case 1: newUri = EntryColumns.FAVORITES_CONTENT_URI; break; case 2: newUri = EntryColumns.SEARCH_URI(mEntriesFragment.getCurrentSearch()); break; default: long feedOrGroupId = mDrawerAdapter.getItemId(position); if (mDrawerAdapter.isItemAGroup(position)) { newUri = EntryColumns.ENTRIES_FOR_GROUP_CONTENT_URI(feedOrGroupId); } else { byte[] iconBytes = mDrawerAdapter.getItemIcon(position); Bitmap bitmap = UiUtils.getScaledBitmap(iconBytes, 24); if (bitmap != null) { mIcon = new BitmapDrawable(getResources(), bitmap); } newUri = EntryColumns.ENTRIES_FOR_FEED_CONTENT_URI(feedOrGroupId); showFeedInfo = false; } mTitle = mDrawerAdapter.getItemName(position); break; } if (!newUri.equals(mEntriesFragment.getUri())) { mEntriesFragment.setData(newUri, showFeedInfo); } mDrawerList.setItemChecked(position, true); // First open => we open the drawer for you if (PrefUtils.getBoolean(PrefUtils.FIRST_OPEN, true)) { PrefUtils.putBoolean(PrefUtils.FIRST_OPEN, false); mDrawerLayout.postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.openDrawer(mDrawerList); } // 500 300 }, 300); } } }