Java tutorial
/* * Copyright (C) 2015 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.appniche.android.sunshine.app; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.ActivityCompat; import android.support.v4.app.ActivityOptionsCompat; import android.support.v4.util.Pair; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import com.appniche.android.sunshine.app.data.WeatherContract; import com.appniche.android.sunshine.app.gcm.RegistrationIntentService; import com.appniche.android.sunshine.app.sync.SunshineSyncAdapter; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GoogleApiAvailability; public class MainActivity extends AppCompatActivity implements ForecastFragment.Callback { private final String LOG_TAG = MainActivity.class.getSimpleName(); private static final String DETAILFRAGMENT_TAG = "DFTAG"; private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; public static final String SENT_TOKEN_TO_SERVER = "sentTokenToServer"; private boolean mTwoPane; private String mLocation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mLocation = Utility.getPreferredLocation(this); Uri contentUri = getIntent() != null ? getIntent().getData() : null; setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setDisplayShowTitleEnabled(false); if (findViewById(R.id.weather_detail_container) != null) { // The detail container view will be present only in the large-screen layouts // (res/layout-sw600dp). If this view is present, then the activity should be // in two-pane mode. mTwoPane = true; // In two-pane mode, show the detail view in this activity by // adding or replacing the detail fragment using a // fragment transaction. if (savedInstanceState == null) { DetailFragment fragment = new DetailFragment(); if (contentUri != null) { Bundle args = new Bundle(); args.putParcelable(DetailFragment.DETAIL_URI, contentUri); fragment.setArguments(args); } getSupportFragmentManager().beginTransaction() .replace(R.id.weather_detail_container, fragment, DETAILFRAGMENT_TAG).commit(); } } else { mTwoPane = false; getSupportActionBar().setElevation(0f); } ForecastFragment forecastFragment = ((ForecastFragment) getSupportFragmentManager() .findFragmentById(R.id.fragment_forecast)); forecastFragment.setUseTodayLayout(!mTwoPane); if (contentUri != null) { forecastFragment.setInitialSelectedDate(WeatherContract.WeatherEntry.getDateFromUri(contentUri)); } SunshineSyncAdapter.initializeSyncAdapter(this); // If Google Play Services is up to date, we'll want to register GCM. If it is not, we'll // skip the registration and this device will not receive any downstream messages from // our fake server. Because weather alerts are not a core feature of the app, this should // not affect the behavior of the app, from a user perspective. if (checkPlayServices()) { // Because this is the initial creation of the app, we'll want to be certain we have // a token. If we do not, then we will start the IntentService that will register this // application with GCM. SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); boolean sentToken = sharedPreferences.getBoolean(SENT_TOKEN_TO_SERVER, false); if (!sentToken) { Intent intent = new Intent(this, RegistrationIntentService.class); startService(intent); } } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { startActivity(new Intent(this, SettingsActivity.class)); return true; } return super.onOptionsItemSelected(item); } @Override protected void onResume() { super.onResume(); String location = Utility.getPreferredLocation(this); // update the location in our second pane using the fragment manager if (location != null && !location.equals(mLocation)) { ForecastFragment ff = (ForecastFragment) getSupportFragmentManager() .findFragmentById(R.id.fragment_forecast); if (null != ff) { ff.onLocationChanged(); } DetailFragment df = (DetailFragment) getSupportFragmentManager().findFragmentByTag(DETAILFRAGMENT_TAG); if (null != df) { df.onLocationChanged(location); } mLocation = location; } } @Override public void onItemSelected(Uri contentUri, ForecastAdapter.ForecastAdapterViewHolder vh) { if (mTwoPane) { // In two-pane mode, show the detail view in this activity by // adding or replacing the detail fragment using a // fragment transaction. Bundle args = new Bundle(); args.putParcelable(DetailFragment.DETAIL_URI, contentUri); DetailFragment fragment = new DetailFragment(); fragment.setArguments(args); getSupportFragmentManager().beginTransaction() .replace(R.id.weather_detail_container, fragment, DETAILFRAGMENT_TAG).commit(); } else { Intent intent = new Intent(this, DetailActivity.class).setData(contentUri); ActivityOptionsCompat activityOptions = ActivityOptionsCompat.makeSceneTransitionAnimation(this, new Pair<View, String>(vh.mIconView, getString(R.string.detail_icon_transition_name))); ActivityCompat.startActivity(this, intent, activityOptions.toBundle()); } } /** * Check the device to make sure it has the Google Play Services APK. If * it doesn't, display a dialog that allows users to download the APK from * the Google Play Store or enable it in the device's system settings. */ private boolean checkPlayServices() { GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance(); int resultCode = apiAvailability.isGooglePlayServicesAvailable(this); if (resultCode != ConnectionResult.SUCCESS) { if (apiAvailability.isUserResolvableError(resultCode)) { apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST).show(); } else { Log.i(LOG_TAG, "This device is not supported."); finish(); } return false; } return true; } }