Java tutorial
package com.bccs.bsecure; import android.app.DialogFragment; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.support.v4.content.LocalBroadcastManager; import android.support.v7.app.AppCompatActivity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.TextView; import java.util.ArrayList; /* * This file is part of Bsecure. A open source, freely available, SMS encryption app. * Copyright (C) 2015 Dr Kevin Coogan, Shane Nalezyty, Lucas Burdell * <p/> * Bsecure is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * <p/> * Bsecure is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * <p/> * You should have received a copy of the GNU General Public License * along with Bsecure. If not, see <http://www.gnu.org/licenses/>. */ public class Main extends AppCompatActivity implements WipeActiveConversationsDialog.WipeActiveConversationsDialogListener { //Global class variables private contactsAdapter activeInfoAdapter; //The list view that contains the on-screen info being displayed private ListView userListView; //ArrayList storing names and numbers in outbox private ArrayList<Integer> activeNums = new ArrayList<>(); private boolean receiverRegistered = false; private Button.OnClickListener optionsClick = new Button.OnClickListener() { @Override public void onClick(View v) { WipeActiveConversationsDialog dialog = new WipeActiveConversationsDialog(); dialog.show(getFragmentManager(), "active_conversations_options"); } }; private AdapterView.OnItemClickListener onListClick = new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> adapterView, View view, int pos, long id) { Intent conversationIntent = new Intent(getApplicationContext(), Conversation.class); conversationIntent.putExtra("name", activeNums.get(pos)); conversationIntent.putExtra("number", activeNums.get(pos)); startActivity(conversationIntent); } }; SmsBroadcastReceiver onNewMsg = new SmsBroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { updateActiveNums(); } }; IntentFilter onNewMsgFilter = new IntentFilter("com.bccs.bsecure.msgReceived"); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Contact.setBaseContext(this.getApplicationContext()); // Intent intent = new Intent(this, TestActivity.class); // startActivity(intent); // System.exit(0); //Get ActionBar Item // getWindow().requestFeature(Window.FEATURE_ACTION_BAR); // ActionBar actionBar = getActionBar(); //initialize global variables userListView = (ListView) findViewById(R.id.usersListView); //Define Listener method userListView.setOnItemClickListener(onListClick); //Read outbox for active conversation information //Initialize the adapter to hold the names of active contacts activeInfoAdapter = new contactsAdapter(); //Display the names. userListView.setAdapter(activeInfoAdapter); updateActiveNums(); findViewById(R.id.activeConversationOptionsButton).setOnClickListener(optionsClick); LocalBroadcastManager.getInstance(this).registerReceiver(onNewMsg, onNewMsgFilter); receiverRegistered = true; } @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); 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(); switch (id) { case R.id.action_new: openNewMessage(); return true; case R.id.action_contacts: openContacts(); return true; case R.id.action_settings: openSettings(); return true; case R.id.action_bugReport: openBugReport(); return true; case R.id.action_about: openAbout(); return true; default: onBackPressed(); return true; } } public void openNewMessage() { Intent intent = new Intent(this, CreateMessage.class); startActivity(intent); } public void openContacts() { Intent intent = new Intent(this, Contacts.class); startActivity(intent); } public void openSettings() { Intent intent = new Intent(this, Settings.class); startActivity(intent); } public void openBugReport() { Intent intent = new Intent(this, BugReport.class); startActivity(intent); } public void openAbout() { Intent intent = new Intent(this, About.class); startActivity(intent); } protected void onStart() { if (!receiverRegistered) { LocalBroadcastManager.getInstance(this).registerReceiver(onNewMsg, onNewMsgFilter); receiverRegistered = true; } updateActiveNums(); super.onStart(); } private void updateActiveNums() { ConversationManager manager = ConversationManager.getManager(this); ArrayList<Integer> activeConversations = manager.getActiveConversations(); for (int s : activeConversations) { ConversationManager.ConversationHelper helper = ConversationManager.getConversation(s); MyMessage message = helper.getLastMessage(); if (!activeNums.contains(s)) { activeNums.add(s); activeInfoAdapter.addItem(message); } else { activeInfoAdapter.updateMessage(message); } } } @Override public void onOKPressed(DialogFragment dialog) { ConversationManager manager = ConversationManager.getManager(this); manager.clearAllConversations(); dialog.dismiss(); activeNums = new ArrayList<>(); activeInfoAdapter.clearItems(); updateActiveNums(); } @Override public void onCancelPressed(DialogFragment dialog) { dialog.dismiss(); } // Custom Adapter to display the differing layouts for chat. private class contactsAdapter extends BaseAdapter { private static final int MAX_TYPES = 1; private ArrayList<MyMessage> contactsArray = new ArrayList<>(); private LayoutInflater inflater; public contactsAdapter() { //create inflater that will hold the chat boxes inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE); } public void addItem(MyMessage message) { contactsArray.add(message); notifyDataSetChanged(); } public void clearItems() { contactsArray = new ArrayList<>(); notifyDataSetChanged(); } public void updateMessage(MyMessage message) { for (MyMessage m : contactsArray) { if (message.getId() == m.getId()) { if (message.get_time() > m.get_time()) { m.setBody(message.getBody()); m.set_name(message.get_name()); } else { } break; } } notifyDataSetChanged(); } public ArrayList<MyMessage> getContactsArray() { ArrayList<MyMessage> newChat = new ArrayList<>(); for (MyMessage m : contactsArray) { newChat.add(m); } return newChat; } @Override public int getItemViewType(int position) { return 0; } @Override public int getViewTypeCount() { return MAX_TYPES; } @Override public int getCount() { return contactsArray.size(); } @Override public MyMessage getItem(int position) { return contactsArray.get(position); } @Override public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { RelativeLayout holder = null; int type = getItemViewType(position); if (convertView == null) { switch (type) { default: convertView = inflater.inflate(R.layout.new_row_layout, null); holder = (RelativeLayout) convertView; break; } } else { //holder.setOnClickListener(); holder = (RelativeLayout) convertView; } final MyMessage item = getItem(position); TextView contactName = (TextView) holder.getChildAt(1); TextView lastMessage = (TextView) holder.getChildAt(2); contactName.setText(item.get_name()); lastMessage.setText((item.getSent() ? "You: " : item.get_name() + ": ") + item.getBody()); holder.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent conversationIntent = new Intent(getApplicationContext(), Conversation.class); conversationIntent.putExtra("contactid", item.getId()); startActivity(conversationIntent); } }); return convertView; } } protected void onResume() { if (!receiverRegistered) { LocalBroadcastManager.getInstance(this).registerReceiver(onNewMsg, onNewMsgFilter); receiverRegistered = true; } updateActiveNums(); super.onResume(); } protected void onPause() { if (receiverRegistered) { LocalBroadcastManager.getInstance(this).unregisterReceiver(onNewMsg); receiverRegistered = false; } super.onPause(); } protected void onStop() { if (receiverRegistered) { LocalBroadcastManager.getInstance(this).unregisterReceiver(onNewMsg); receiverRegistered = false; } super.onStop(); } // onDestroy is called when the entire application is exited // We can close our DB from here. protected void onDestroy() { if (receiverRegistered) { LocalBroadcastManager.getInstance(this).unregisterReceiver(onNewMsg); receiverRegistered = false; } ConversationManager.closeConnection(); super.onDestroy(); } }