Java tutorial
/* * Copyright (C) 2014 Joakim Andersson * Copyright (C) 2014 blunden * * This file is part of PactrackDroid, an Android application to keep * track of parcels sent with the Swedish mail service (Posten). * * PactrackDroid 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 2 of the License, or * (at your option) any later version. * * PactrackDroid 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 nu.firetech.android.pactrack.frontend; import nu.firetech.android.pactrack.R; import nu.firetech.android.pactrack.backend.ParcelDbAdapter; import nu.firetech.android.pactrack.backend.Preferences; import nu.firetech.android.pactrack.backend.ServiceStarter; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.ActionBarActivity; import android.view.MenuItem; public class MainActivity extends ActionBarActivity implements ParcelListFragment.ParentActivity, ParcelDetailsFragment.ParentActivity, ParcelIdDialog.ParentActivity { private final static String KEY_DISPLAY_OPT = "display_options"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_window); // Start service if it isn't running (not entirely fool-proof, but works) if (ServiceStarter.getCurrentInterval() == -1) { ParcelDbAdapter dbAdapter = new ParcelDbAdapter(this); dbAdapter.open(); ServiceStarter.startService(this, dbAdapter); dbAdapter.close(); } // Using the single pane layout, set initial fragment. if (findViewById(R.id.fragment_container) != null && savedInstanceState == null) { ParcelListFragment firstFragment = new ParcelListFragment(); firstFragment.setArguments(getIntent().getExtras()); getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, firstFragment).commit(); } if (getIntent() != null) { onNewIntent(getIntent()); } } @Override public void onNewIntent(Intent intent) { super.onNewIntent(intent); Bundle extras = (intent != null ? intent.getExtras() : null); if (extras != null) { if (extras.containsKey(ParcelDbAdapter.KEY_ROWID)) { showParcel(extras.getLong(ParcelDbAdapter.KEY_ROWID), extras.getBoolean(ParcelDetailsFragment.FORCE_REFRESH)); } } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt(KEY_DISPLAY_OPT, getSupportActionBar().getDisplayOptions()); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); int savedDisplayOpt = savedInstanceState.getInt(KEY_DISPLAY_OPT); if (savedDisplayOpt != 0) { getSupportActionBar().setDisplayOptions(savedDisplayOpt); } } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: getSupportFragmentManager().popBackStack(); return true; } return super.onOptionsItemSelected(item); } @Override public void showAndRefreshParcel(long rowId) { showParcel(rowId, true); } @Override public void showParcel(long rowId, boolean forceRefresh) { FragmentManager manager = getSupportFragmentManager(); if (manager.findFragmentById(R.id.details_frag) == null) { // First load of fragment or one pane layout ParcelDetailsFragment newFragment = new ParcelDetailsFragment(); Bundle args = new Bundle(); args.putLong(ParcelDbAdapter.KEY_ROWID, rowId); if (forceRefresh) { args.putBoolean(ParcelDetailsFragment.FORCE_REFRESH, true); } newFragment.setArguments(args); int viewId = R.id.details_frag; boolean fullscreen = false; if (findViewById(viewId) == null) { viewId = R.id.fragment_container; fullscreen = true; // Avoid duplicated parcels in back stack if (manager.findFragmentById(viewId) instanceof ParcelDetailsFragment && ((ParcelDetailsFragment) manager.findFragmentById(viewId)).getCurrentRowId() == rowId) { manager.popBackStackImmediate(); } } FragmentTransaction transaction = manager.beginTransaction(); transaction.replace(viewId, newFragment); if (fullscreen) { transaction.addToBackStack(null); getSupportActionBar().setDisplayHomeAsUpEnabled(true); } transaction.commit(); } else { ParcelDetailsFragment fragment = (ParcelDetailsFragment) manager.findFragmentById(R.id.details_frag); fragment.switchParcel(rowId, forceRefresh); } if (findViewById(R.id.list_frag) != null) { ParcelListFragment list = (ParcelListFragment) manager.findFragmentById(R.id.list_frag); list.selectRowItem(rowId); if (forceRefresh) { list.refreshDone(); } } } @Override public void onListResume() { getSupportActionBar().setDisplayHomeAsUpEnabled(false); setTitle(R.string.app_name); } @Override public void onCurrentParcelRemoved() { FragmentManager manager = getSupportFragmentManager(); if (manager.findFragmentById(R.id.details_frag) != null) { FragmentTransaction transaction = manager.beginTransaction(); transaction.remove(manager.findFragmentById(R.id.details_frag)); transaction.commit(); } else if (manager.getBackStackEntryCount() > 0) { manager.popBackStack(); } if (manager.findFragmentById(R.id.list_frag) != null) { ParcelListFragment list = (ParcelListFragment) getSupportFragmentManager() .findFragmentById(R.id.list_frag); list.selectRowItem(null); list.refreshDone(); } } @Override public void onAutoUpdateChanged(long rowId, boolean value) { FragmentManager manager = getSupportFragmentManager(); if (Preferences.getPreferences(this).getCheckInterval() == 0) { value = true; } for (Fragment f : manager.getFragments()) { if (f instanceof AutoUpdateIconContext) { ((AutoUpdateIconContext) f).onAutoUpdateChanged(rowId, value); } } } }