Java tutorial
/* * Copyright (c) 2016 Martin Norbert * 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.site_monitor.activity; import android.app.AlertDialog; import android.content.ComponentName; import android.content.DialogInterface; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.graphics.Bitmap; import android.net.ConnectivityManager; import android.os.Bundle; import android.os.CountDownTimer; import android.os.Parcelable; import android.support.design.widget.Snackbar; import android.support.v4.app.FragmentManager; import android.support.v4.content.LocalBroadcastManager; import android.support.v7.app.AppCompatActivity; import android.text.InputType; import android.text.format.DateUtils; import android.util.Log; import android.util.Pair; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Chronometer; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import org.site_monitor.BuildConfig; import org.site_monitor.R; import org.site_monitor.activity.adapter.SiteSettingsAdapter; import org.site_monitor.activity.fragment.DummySiteInjector; import org.site_monitor.activity.fragment.TaskFragment; import org.site_monitor.model.adapter.SiteSettingsBusiness; import org.site_monitor.model.bo.SiteCall; import org.site_monitor.model.bo.SiteSettings; import org.site_monitor.model.db.DBHelper; import org.site_monitor.model.db.DBSiteSettings; import org.site_monitor.receiver.BatteryLevelReceiver; import org.site_monitor.receiver.StartupBootReceiver; import org.site_monitor.receiver.internal.AlarmBroadcastReceiver; import org.site_monitor.receiver.internal.NetworkBroadcastReceiver; import org.site_monitor.service.FavIconService; import org.site_monitor.service.NetworkService; import org.site_monitor.task.CallSiteTask; import org.site_monitor.task.TaskCallback; import org.site_monitor.util.AlarmUtil; import org.site_monitor.util.ConnectivityUtil; import org.site_monitor.util.TimeUtil; import java.sql.SQLException; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * Allow user to add and monitor site settings. */ public class MainActivity extends AppCompatActivity implements SiteSettingsAdapter.Handler, TaskCallback<CallSiteTask, Void, List<Pair<SiteSettings, SiteCall>>>, NetworkBroadcastReceiver.Listener, AlarmBroadcastReceiver.Listener { private static final String TAG_TASK_FRAGMENT = "main_activity_task_fragment"; private static final String TAG = MainActivity.class.getSimpleName(); private static final String PARCEL_SITE_LIST = "SITE_LIST"; private MainActivity context = this; private ListView listView; private TextView connectivityAlertView; private TaskFragment taskFragment; private Chronometer chronometer; private CountDownTimer countDownTimer; private NetworkBroadcastReceiver networkBroadcastReceiver; private AlarmBroadcastReceiver alarmBroadcastReceiver; private View timerBannerView; private DBHelper dbHelper; private AlarmUtil alarmUtil = AlarmUtil.instance(); private SiteSettingsAdapter siteSettingsAdapter; private List<SiteSettingsBusiness> siteSettingsList; private boolean loadDataFromDb; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); dbHelper = DBHelper.getHelper(this); listView = this.findViewById(R.id.listView); connectivityAlertView = this.findViewById(R.id.connectivityAlert); chronometer = this.findViewById(R.id.chronometer); timerBannerView = this.findViewById(R.id.timerBanner); FragmentManager fragmentManager = getSupportFragmentManager(); taskFragment = (TaskFragment) fragmentManager.findFragmentByTag(TAG_TASK_FRAGMENT); if (taskFragment == null) { taskFragment = new TaskFragment(); fragmentManager.beginTransaction().add(taskFragment, TAG_TASK_FRAGMENT).commit(); } if (savedInstanceState == null || savedInstanceState.isEmpty()) { siteSettingsList = new ArrayList<>(); loadDataFromDb = true; } else { siteSettingsList = savedInstanceState.getParcelableArrayList(PARCEL_SITE_LIST); } siteSettingsAdapter = new SiteSettingsAdapter(context, this, siteSettingsList); listView.setAdapter(siteSettingsAdapter); if (networkBroadcastReceiver == null) { networkBroadcastReceiver = new NetworkBroadcastReceiver(this); } if (alarmBroadcastReceiver == null) { alarmBroadcastReceiver = new AlarmBroadcastReceiver(this); } // start alarm on 1st install or if not started on system boot alarmUtil.startAlarmIfNeeded(this); } @Override protected void onStop() { super.onStop(); loadDataFromDb = true; LocalBroadcastManager.getInstance(this).unregisterReceiver(alarmBroadcastReceiver); LocalBroadcastManager.getInstance(this).unregisterReceiver(networkBroadcastReceiver); unregisterReceiver(networkBroadcastReceiver); } @Override protected void onDestroy() { super.onDestroy(); if (dbHelper != null) { dbHelper.release(); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putParcelableArrayList(PARCEL_SITE_LIST, new ArrayList<Parcelable>(siteSettingsList)); } @Override protected void onResume() { super.onResume(); if (loadDataFromDb) { loadSiteSettingsBusinesses(); } else { loadDataFromDb = false; } scheduleTimer(); onNetworkStateChanged(ConnectivityUtil.isConnected(this)); LocalBroadcastManager.getInstance(this).registerReceiver(alarmBroadcastReceiver, new IntentFilter(AlarmUtil.ACTION_NEXT_ALARM_SET)); LocalBroadcastManager.getInstance(this).registerReceiver(networkBroadcastReceiver, new IntentFilter(NetworkService.ACTION_SITE_START_REFRESH)); LocalBroadcastManager.getInstance(this).registerReceiver(networkBroadcastReceiver, new IntentFilter(NetworkService.ACTION_SITE_END_REFRESH)); LocalBroadcastManager.getInstance(this).registerReceiver(networkBroadcastReceiver, new IntentFilter(FavIconService.ACTION_FAVICON_UPDATED)); registerReceiver(networkBroadcastReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION)); } private void loadSiteSettingsBusinesses() { try { List<SiteSettings> list = dbHelper.getDBSiteSettings().queryForAll(); siteSettingsList.clear(); for (SiteSettings siteSettings : list) { siteSettingsList.add(new SiteSettingsBusiness(siteSettings)); } } catch (SQLException e) { Log.e(TAG, "queryForAll", e); } Collections.sort(siteSettingsList, SiteSettingsBusiness.NAME_COMPARATOR); siteSettingsAdapter.notifyDataSetChanged(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); if (BuildConfig.DEBUG) { MenuItem debugItem = menu.findItem(R.id.action_debug); debugItem.setVisible(true); MenuItem injectItem = menu.findItem(R.id.action_inject); injectItem.setVisible(true); } 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(); if (id == R.id.action_refresh) { if (BuildConfig.DEBUG) { Log.i(TAG, "global refresh requested"); } NetworkService.enqueueCheckSitesWork(this); return true; } if (id == R.id.action_settings) { PrefSettingsActivity.start(context); return true; } if (id == R.id.action_about) { AboutActivity.start(context); return true; } if (id == R.id.action_inject) { try { DummySiteInjector.inject(this.getCurrentFocus(), taskFragment, dbHelper.getDBSiteSettings()); loadSiteSettingsBusinesses(); alarmUtil.startAlarmIfNeeded(context); } catch (SQLException e) { Log.e(TAG, "dummyinject", e); } return true; } if (id == R.id.action_debug) { StringBuilder sb = new StringBuilder("you're on alpha version").append("\n"); sb.append("Connectivity: ").append(ConnectivityUtil.isConnected(context)).append("\n"); int startupBootState = context.getPackageManager() .getComponentEnabledSetting(new ComponentName(context, StartupBootReceiver.class)); boolean startupBootEnable = (startupBootState == PackageManager.COMPONENT_ENABLED_STATE_DEFAULT || startupBootState == PackageManager.COMPONENT_ENABLED_STATE_ENABLED); sb.append("StartupBoot state: ").append(startupBootEnable).append("\n"); sb.append("Alarm set: ").append(alarmUtil.getCurrentInterval()).append("\n"); sb.append("Battery: ").append(BatteryLevelReceiver.getLastAction()).append("\n"); Toast.makeText(this, sb.toString(), Toast.LENGTH_LONG).show(); return true; } return super.onOptionsItemSelected(item); } @Override public void onPreExecute(CallSiteTask task) { } @Override public void onProgressUpdate(CallSiteTask task, Void... percent) { } @Override public void onPostExecute(CallSiteTask task, List<Pair<SiteSettings, SiteCall>> result) { } @Override public void onCancelled(CallSiteTask task) { } @Override public void onSiteStartRefresh(SiteSettings siteSettings) { int position = siteSettingsAdapter.getPosition(new SiteSettingsBusiness(siteSettings)); if (position != -1) { siteSettingsAdapter.getItem(position).setIsChecking(true); } siteSettingsAdapter.notifyDataSetChanged(); } @Override public void onSiteEndRefresh(SiteSettings siteSettings, SiteCall siteCall) { int position = siteSettingsAdapter.getPosition(new SiteSettingsBusiness(siteSettings)); if (position != -1) { SiteSettingsBusiness siteSettingsView = siteSettingsAdapter.getItem(position); siteSettingsView.setIsChecking(false); siteSettingsView.getCalls().add(siteCall); siteSettingsAdapter.notifyDataSetChanged(); } } @Override public void onFaviconUpdated(SiteSettings siteSettings, Bitmap favicon) { int position = siteSettingsAdapter.getPosition(new SiteSettingsBusiness(siteSettings)); if (position != -1) { SiteSettingsBusiness siteSettingsView = siteSettingsAdapter.getItem(position); siteSettingsView.setFavicon(favicon); siteSettingsAdapter.notifyDataSetChanged(); } } @Override public void onNetworkStateChanged(boolean hasConnectivity) { if (hasConnectivity && connectivityAlertView.getVisibility() != View.GONE) { connectivityAlertView.setVisibility(View.GONE); } else if (!hasConnectivity && connectivityAlertView.getVisibility() != View.VISIBLE) { connectivityAlertView.setVisibility(View.VISIBLE); } } private void scheduleTimer() { if (countDownTimer != null) { countDownTimer.cancel(); } final long nextAlarmTime = alarmUtil.getNextAlarmTime(this); final long nextAlarmInterval = alarmUtil.getCountUntilNextAlarmTime(this); if (nextAlarmInterval > 0) { timerBannerView.setVisibility(View.VISIBLE); countDownTimer = new CountDownTimer(nextAlarmInterval, TimeUtil._1_SEC * 5) { public void onTick(long millisUntilFinished) { chronometer.setText(DateUtils.getRelativeTimeSpanString(nextAlarmTime)); chronometer.setText(DateUtils.getRelativeTimeSpanString(nextAlarmTime, System.currentTimeMillis(), DateUtils.MINUTE_IN_MILLIS)); } public void onFinish() { chronometer.setText(R.string.imminent); } }.start(); } else { timerBannerView.setVisibility(View.GONE); } } public void floatingAddSite(final View v) { AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle(R.string.add_monitor); final EditText input = new EditText(context); input.setHint(R.string.hint_site_url); input.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS | InputType.TYPE_TEXT_VARIATION_URI); builder.setView(input); builder.setPositiveButton(R.string.action_add, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String host = input.getText().toString().trim(); if (host.isEmpty()) { return; } try { DBSiteSettings dbSiteSettings = dbHelper.getDBSiteSettings(); if (dbSiteSettings.findForHost(host) != null) { Snackbar.make(v, host + getString(R.string.already_exists), Snackbar.LENGTH_SHORT).show(); return; } SiteSettings siteSettings = new SiteSettings(host); dbSiteSettings.create(siteSettings); alarmUtil.startAlarmIfNeeded(context); new CallSiteTask(context, taskFragment).execute(siteSettings); SiteSettingsActivity.start(context, siteSettings.getHost()); } catch (SQLException e) { Log.e(TAG, "create", e); } } }); builder.setNegativeButton(R.string.action_cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); builder.show(); } @Override public void touched(SiteSettingsBusiness siteSettings) { SiteSettingsActivity.start(context, siteSettings.getHost()); } @Override public void onNextAlarmChange(long nextAlarm) { scheduleTimer(); } }