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 org.roman.findme; import android.app.AlarmManager; import android.app.PendingIntent; 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.util.Log; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.ProgressBar; import android.widget.TextView; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GoogleApiAvailability; import org.roman.findme.location_service.AlarmReceiver; import org.roman.findme.location_service.Constants; import java.util.Calendar; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; public static final String TAG = Constants.TAG; private BroadcastReceiver mRegistrationBroadcastReceiver; private ProgressBar mRegistrationProgressBar; private TextView mInformationTextView; private Button btnAlarmService, btnStopAlarmSevice; private boolean isReceiverRegistered; SharedPreferences sharedPreferences; CheckBox checkBox; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sharedPreferences = getSharedPreferences(RegistrationIntentService.APP_PREFERENCES, Context.MODE_PRIVATE); 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(QuickstartPreferences.SENT_TOKEN_TO_SERVER, false); if (sentToken) { mInformationTextView.setText(getString(R.string.gcm_send_message)); } else { mInformationTextView.setText(getString(R.string.token_error_message)); } } }; mInformationTextView = (TextView) findViewById(R.id.informationTextView); // Registering BroadcastReceiver registerReceiver(); if (checkPlayServices()) { // Start IntentService to register this application with GCM. Intent intent = new Intent(this, RegistrationIntentService.class); startService(intent); } checkBox = (CheckBox) findViewById(R.id.checkBox); checkBox.setChecked(sharedPreferences.getBoolean("display_message", false)); checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { SharedPreferences.Editor ed = sharedPreferences.edit(); ed.putBoolean("display_message", isChecked); ed.commit(); } }); btnAlarmService = (Button) findViewById(R.id.btnAlarmService); btnAlarmService.setOnClickListener(this); btnStopAlarmSevice = (Button) findViewById(R.id.btnStopAlarmService); btnStopAlarmSevice.setOnClickListener(this); } @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(QuickstartPreferences.REGISTRATION_COMPLETE)); isReceiverRegistered = true; } } 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; } @Override public void onClick(final View v) { switch (v.getId()) { case R.id.btnAlarmService: Log.d(TAG, "btnAlarmService"); startLocationService(); break; case R.id.btnStopAlarmService: Log.d(TAG, "btnStopAlarmService"); stopLocationService(); break; default: break; } } void startLocationService() { // Intent intent = new Intent(this, AndroidLocationServices.class); // startService(intent); Intent intent = new Intent(this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1253, intent, PendingIntent.FLAG_CANCEL_CURRENT); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(System.currentTimeMillis()); AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE); alarm.cancel(pendingIntent); alarm.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_HOUR, pendingIntent); } void stopLocationService() { Intent intent = new Intent(this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1253, intent, 0); AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); alarmManager.cancel(pendingIntent); } }