Java tutorial
/** * Copyright 2015 Google Inc. All Rights Reserved. * * 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.thyn.broadcast; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.content.LocalBroadcastManager; import android.support.v7.app.AppCompatActivity; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.widget.ProgressBar; import android.widget.TextView; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GoogleApiAvailability; import com.thyn.common.MyServerSettings; import com.thyn.tab.WelcomePageActivity; public class MainActivity extends AppCompatActivity { private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; private static final String TAG = "MainActivity"; private BroadcastReceiver mRegistrationBroadcastReceiver; private ProgressBar mRegistrationProgressBar; private TextView mInformationTextView; private boolean isReceiverRegistered; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.activity_main); Log.d(TAG, "I am in mainactivity"); //mRegistrationProgressBar = (ProgressBar) findViewById(R.id.registrationProgressBar); mRegistrationBroadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { //mRegistrationProgressBar.setVisibility(ProgressBar.GONE); SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context); boolean sentToken = sharedPreferences.getBoolean(GCMPreferences.SENT_TOKEN_TO_SERVER, false); if (sentToken) { //mInformationTextView.setText(getString(R.string.gcm_send_message)); Log.d(TAG, "The token has already been sent to the server. Starting WelcomePageActivity.class"); Intent i = new Intent(getBaseContext(), WelcomePageActivity.class); startActivity(i); } else { //mInformationTextView.setText(getString(R.string.token_error_message)); Log.d(TAG, "don't have the token in the SharedPreferences cache. Need to ask GCM server for a token that I can send to the app server"); } } }; //mInformationTextView = (TextView) findViewById(R.id.informationTextView); // Registering BroadcastReceiver registerReceiver(); if (checkPlayServices()) { // Start IntentService to register this application with GCM. Log.d(TAG, "checkPlayServices() is successful. starting GcmRegistrationIntentService.class"); Intent intent = new Intent(this, GcmRegistrationIntentService.class); startService(intent); } } @Override protected void onResume() { super.onResume(); // registerReceiver(); } @Override protected void onPause() { LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver); isReceiverRegistered = false; super.onPause(); } private void registerReceiver() { if (!isReceiverRegistered) { LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver, new IntentFilter(GCMPreferences.REGISTRATION_COMPLETE)); isReceiverRegistered = true; } Log.d(TAG, "Registered the receiver"); } /** * 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(TAG, "This device is not supported."); finish(); } return false; } return true; } }