Java tutorial
/* * Copyright 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.mysmallcornerstudios.tempus.ui; import android.content.res.Configuration; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; 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.SimpleCursorAdapter; import android.widget.TextView; import com.mysmallcornerstudios.tempus.R; import com.mysmallcornerstudios.tempus.dal.AlarmProvider; import com.mysmallcornerstudios.tempus.dal.AlarmSQLiteHelper; import com.mysmallcornerstudios.tempus.dal.TimerProvider; import com.mysmallcornerstudios.tempus.dal.TimerSQLiteHelper; import com.mysmallcornerstudios.tempus.ui.util.MenuActions; import static com.mysmallcornerstudios.tempus.dal.AlarmSQLiteHelper.TIME; import static com.mysmallcornerstudios.tempus.dal.TimerSQLiteHelper.ALARM_COUNT; import static com.mysmallcornerstudios.tempus.dal.TimerSQLiteHelper.DURATION; import static com.mysmallcornerstudios.tempus.dal.TimerSQLiteHelper.ID; import static com.mysmallcornerstudios.tempus.dal.TimerSQLiteHelper.NAME; public class MainActivity extends FragmentActivity implements LoaderManager.LoaderCallbacks<Cursor> { private DrawerLayout drawerLayout; private ListView timerList; private ActionBarDrawerToggle drawerToggle; private SimpleCursorAdapter timerCursorAdapter; private CharSequence drawerTitle; private CharSequence title; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); title = drawerTitle = getTitle(); getSupportLoaderManager().initLoader(TIMER_LOADER, savedInstanceState, this); final String[] timerFromColumns = { ID, NAME, DURATION, ALARM_COUNT }; final int[] timerToViews = { R.id.timer_row_id, R.id.timer_name, R.id.timer_duration, R.id.timer_alarm_count }; timerCursorAdapter = new SimpleCursorAdapter(this, R.layout.drawer_list_item, null, timerFromColumns, timerToViews, 0); timerList = (ListView) findViewById(R.id.left_drawer); timerList.setAdapter(timerCursorAdapter); timerList.setOnItemClickListener(new DrawerItemClickListener()); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); drawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ drawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(title); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(drawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; drawerLayout.setDrawerListener(drawerToggle); if (savedInstanceState == null) { // selectItem(0, 0, "Tempus", "", 0); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.timer, menu); return super.onCreateOptionsMenu(menu); } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view boolean drawerOpen = drawerLayout.isDrawerOpen(timerList); menu.findItem(R.id.add_timer).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (drawerToggle.onOptionsItemSelected(item)) { return true; } switch (item.getItemId()) { case R.id.add_timer: MenuActions.openAddTimerDialog(getSupportFragmentManager()); break; case R.id.menu_settings: break; default: return super.onOptionsItemSelected(item); } return false; } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Long timerId = Long.parseLong(((TextView) view.findViewById(R.id.timer_row_id)).getText().toString()); String timerName = (((TextView) view.findViewById(R.id.timer_name)).getText()).toString(); String duration = (((TextView) view.findViewById(R.id.timer_duration)).getText()).toString(); int alarmCount = Integer .parseInt(((TextView) view.findViewById(R.id.timer_alarm_count)).getText().toString()); selectItem(position, timerId, timerName, duration, alarmCount); } } private void selectItem(int position, long timerId, String timerName, String duration, int alarmCount) { final Bundle args = new Bundle(); args.putLong(ID, timerId); args.putString(NAME, timerName); args.putString(DURATION, duration); args.putInt(ALARM_COUNT, alarmCount); final Fragment fragment = new TimerFragment(); fragment.setArguments(args); getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, fragment).commit(); // update selected item and title, then close the drawer timerList.setItemChecked(position, true); setTitle(timerName); drawerLayout.closeDrawer(timerList); } @Override public void setTitle(CharSequence title) { this.title = title; getActionBar().setTitle(this.title); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. drawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggls drawerToggle.onConfigurationChanged(newConfig); } @Override public Loader<Cursor> onCreateLoader(int loaderId, Bundle bundle) { CursorLoader cursorLoader = null; switch (loaderId) { case TIMER_LOADER: cursorLoader = new CursorLoader(this, TimerProvider.CONTENT_URI, TimerSQLiteHelper.COLUMNS, null, null, null); break; } return cursorLoader; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { switch (loader.getId()) { case TIMER_LOADER: timerCursorAdapter.changeCursor(cursor); break; } } @Override public void onLoaderReset(Loader<Cursor> loader) { switch (loader.getId()) { case TIMER_LOADER: timerCursorAdapter.changeCursor(null); break; } } private static final int TIMER_LOADER = 0x00; }