Java tutorial
/* * Copyright (C) 2012-2013 Paul Watts (paulcwatts@gmail.com) * * 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 can.yrt.onebusaway; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.MenuItem; import com.actionbarsherlock.view.Window; import can.yrt.oba.elements.ObaStop; import can.yrt.oba.provider.ObaContract; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class ArrivalsListActivity extends SherlockFragmentActivity { //private static final String TAG = "ArrivalInfoActivity"; public static final String STOP_NAME = ".StopName"; public static final String STOP_DIRECTION = ".StopDir"; public static class Builder { private Context mContext; private Intent mIntent; public Builder(Context context, String stopId) { mContext = context; mIntent = new Intent(context, ArrivalsListActivity.class); mIntent.setData(Uri.withAppendedPath(ObaContract.Stops.CONTENT_URI, stopId)); } public Builder(Context context, ObaStop stop) { mContext = context; mIntent = new Intent(context, ArrivalsListActivity.class); mIntent.setData(Uri.withAppendedPath(ObaContract.Stops.CONTENT_URI, stop.getId())); setStopName(stop.getName()); setStopDirection(stop.getDirection()); } public Builder setStopName(String stopName) { mIntent.putExtra(STOP_NAME, stopName); return this; } public Builder setStopDirection(String stopDir) { mIntent.putExtra(STOP_DIRECTION, stopDir); return this; } public Builder setUpMode(String mode) { mIntent.putExtra(NavHelp.UP_MODE, mode); return this; } public Intent getIntent() { return mIntent; } public void start() { mContext.startActivity(mIntent); } } // // Two of the most common methods of starting this activity. // public static void start(Context context, String stopId) { new Builder(context, stopId).start(); } public static void start(Context context, ObaStop stop) { new Builder(context, stop).start(); } private boolean mNewFragment = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); UIHelp.setupActionBar(this); FragmentManager fm = getSupportFragmentManager(); // Create the list fragment and add it as our sole content. if (fm.findFragmentById(android.R.id.content) == null) { ArrivalsListFragment list = new ArrivalsListFragment(); list.setArguments(FragmentUtils.getIntentArgs(getIntent())); fm.beginTransaction().add(android.R.id.content, list).commit(); } } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); setIntent(intent); // // We can't modify the fragment state here // because the activity manager still thinks we're not saved. // So we have to put it off. // mNewFragment = true; } @Override protected void onResume() { super.onResume(); boolean newFrag = mNewFragment; mNewFragment = false; if (newFrag) { FragmentManager fm = getSupportFragmentManager(); ArrivalsListFragment list = new ArrivalsListFragment(); list.setArguments(FragmentUtils.getIntentArgs(getIntent())); FragmentTransaction ft = fm.beginTransaction(); ft.replace(android.R.id.content, list); // This is a bit of a hack, but if there's a backstack // it means people navigated away from this activity while // in a report problem fragment. // In this case, we *want* to be a part of the backstack; // otherwise we just want to clear everything out. if (fm.getBackStackEntryCount() > 0) { ft.addToBackStack(null); } ft.commit(); } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { NavHelp.goUp(this); return true; } return false; } public ArrivalsListFragment getArrivalsListFragment() { FragmentManager fm = getSupportFragmentManager(); return (ArrivalsListFragment) fm.findFragmentById(android.R.id.content); } }