Java tutorial
/** * Flym * * 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.carlrice.reader.activity; import android.app.AlertDialog; import android.app.LoaderManager; import android.content.CursorLoader; import android.content.DialogInterface; 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.graphics.drawable.ColorDrawable; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.graphics.Palette; import android.support.v7.widget.Toolbar; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import android.widget.Toast; import com.carlrice.reader.Application; import com.carlrice.reader.Constants; import com.carlrice.reader.R; import com.carlrice.reader.adapter.DrawerAdapter; import com.carlrice.reader.fragment.EntriesListFragment; import com.carlrice.reader.provider.FeedData; import com.carlrice.reader.provider.FeedData.EntryColumns; import com.carlrice.reader.provider.FeedData.FeedColumns; import com.carlrice.reader.service.FetcherService; import com.carlrice.reader.service.RefreshService; import com.carlrice.reader.utils.PrefUtils; import com.carlrice.reader.utils.UiUtils; import static android.support.v7.graphics.Palette.*; public class HomeActivity extends BaseActivity implements LoaderManager.LoaderCallbacks<Cursor> { private static final String STATE_CURRENT_DRAWER_POS = "STATE_CURRENT_DRAWER_POS"; private static final String FEED_UNREAD_NUMBER = "(SELECT " + Constants.DB_COUNT + " FROM " + EntryColumns.TABLE_NAME + " WHERE " + EntryColumns.IS_READ + " IS NULL AND " + EntryColumns.FEED_ID + '=' + FeedColumns.TABLE_NAME + '.' + FeedColumns._ID + ')'; private static final String WHERE_UNREAD_ONLY = "(SELECT " + Constants.DB_COUNT + " FROM " + EntryColumns.TABLE_NAME + " WHERE " + EntryColumns.IS_READ + " IS NULL AND " + EntryColumns.FEED_ID + "=" + FeedColumns.TABLE_NAME + '.' + FeedColumns._ID + ") > 0" + " OR (" + FeedColumns.IS_GROUP + "=1 AND (SELECT " + Constants.DB_COUNT + " FROM " + FeedData.ENTRIES_TABLE_WITH_FEED_INFO + " WHERE " + EntryColumns.IS_READ + " IS NULL AND " + FeedColumns.GROUP_ID + '=' + FeedColumns.TABLE_NAME + '.' + FeedColumns._ID + ") > 0)"; private static final int LOADER_ID = 0; private static final int SEARCH_DRAWER_POSITION = -1; private EntriesListFragment mEntriesFragment; private DrawerLayout mDrawerLayout; private View mLeftDrawer; private ListView mDrawerList; private DrawerAdapter mDrawerAdapter; private ActionBarDrawerToggle mDrawerToggle; private final SharedPreferences.OnSharedPreferenceChangeListener mShowReadListener = new SharedPreferences.OnSharedPreferenceChangeListener() { @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { if (PrefUtils.SHOW_READ.equals(key)) { getLoaderManager().restartLoader(LOADER_ID, null, HomeActivity.this); } } }; private CharSequence mTitle; private int mCurrentDrawerPos; private boolean mCanQuit = false; @Override protected void onCreate(Bundle savedInstanceState) { UiUtils.setPreferenceTheme(this); super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); mEntriesFragment = (EntriesListFragment) getFragmentManager().findFragmentById(R.id.entries_list_fragment); mTitle = getTitle(); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setHomeButtonEnabled(true); mLeftDrawer = findViewById(R.id.left_drawer); mDrawerList = (ListView) findViewById(R.id.drawer_list); 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); if (mDrawerLayout != null) { mDrawerLayout.postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.closeDrawer(mLeftDrawer); } }, 50); } } }); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); if (mDrawerLayout != null) { mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close); 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)); } } } @Override protected void onSaveInstanceState(Bundle outState) { outState.putInt(STATE_CURRENT_DRAWER_POS, mCurrentDrawerPos); super.onSaveInstanceState(outState); } @Override protected void onResume() { super.onResume(); PrefUtils.registerOnPrefChangeListener(mShowReadListener); } @Override protected void onPause() { PrefUtils.unregisterOnPrefChangeListener(mShowReadListener); 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 onOptionsItemSelected(MenuItem item) { if (mDrawerToggle != null && mDrawerToggle.onOptionsItemSelected(item)) { return true; } return super.onOptionsItemSelected(item); } public void onClickHideRead(View view) { if (!PrefUtils.getBoolean(PrefUtils.SHOW_READ, true)) { PrefUtils.putBoolean(PrefUtils.SHOW_READ, true); } else { PrefUtils.putBoolean(PrefUtils.SHOW_READ, false); } } public void onClickEditFeeds(View view) { startActivity(new Intent(this, EditFeedsListActivity.class)); } public void onClickSearch(View view) { selectDrawerItem(SEARCH_DRAWER_POSITION); if (mDrawerLayout != null) { mDrawerLayout.postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.closeDrawer(mLeftDrawer); } }, 50); } } public void onClickSettings(View view) { startActivity(new Intent(this, GeneralPrefsActivity.class)); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. if (mDrawerToggle != null) { mDrawerToggle.syncState(); } } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (mDrawerToggle != null) { 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 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); } }); } } @Override public void onLoaderReset(Loader<Cursor> cursorLoader) { mDrawerAdapter.setCursor(null); } private void selectDrawerItem(int position) { mCurrentDrawerPos = position; Uri newUri; boolean showFeedInfo = true; switch (position) { case SEARCH_DRAWER_POSITION: newUri = EntryColumns.SEARCH_URI(mEntriesFragment.getCurrentSearch()); mToolbarPaletteListener.onGenerated(null); break; case 0: newUri = EntryColumns.ALL_ENTRIES_CONTENT_URI; mToolbarPaletteListener.onGenerated(null); break; case 1: newUri = EntryColumns.FAVORITES_CONTENT_URI; mToolbarPaletteListener.onGenerated(null); break; default: long feedOrGroupId = mDrawerAdapter.getItemId(position); if (mDrawerAdapter.isItemAGroup(position)) { newUri = EntryColumns.ENTRIES_FOR_GROUP_CONTENT_URI(feedOrGroupId); mToolbarPaletteListener.onGenerated(null); } else { mDrawerAdapter.getItemIconPalette(position, mToolbarPaletteListener); 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); if (mDrawerLayout != null) { mDrawerLayout.postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.openDrawer(mLeftDrawer); } }, 500); } AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.welcome_title).setItems(new CharSequence[] { getString(R.string.google_news_title), getString(R.string.add_custom_feed) }, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { if (which == 1) { startActivity(new Intent(Intent.ACTION_INSERT).setData(FeedColumns.CONTENT_URI)); } else { startActivity(new Intent(HomeActivity.this, AddGoogleNewsActivity.class)); } } }); builder.show(); } // Set title & icon switch (mCurrentDrawerPos) { case SEARCH_DRAWER_POSITION: getSupportActionBar().setTitle(android.R.string.search_go); break; case 0: getSupportActionBar().setTitle(R.string.all); break; case 1: getSupportActionBar().setTitle(R.string.favorites); break; default: getSupportActionBar().setTitle(mTitle); break; } // Put the good menu invalidateOptionsMenu(); } private PaletteAsyncListener mToolbarPaletteListener = new PaletteAsyncListener() { @Override public void onGenerated(Palette palette) { UiUtils.setActionBarColors(getSupportActionBar(), palette); } }; }