Java tutorial
/* * Copyright (C) 2014 Ferid Cafer * * 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.ferid.app.frequentcontacts.selectnumber; import android.Manifest; import android.app.SearchManager; import android.content.ContentResolver; import android.content.ContentUris; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.database.Cursor; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.provider.ContactsContract; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.SearchView; import android.support.v7.widget.Toolbar; import android.text.TextUtils; import android.util.Base64; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import android.widget.ProgressBar; import com.ferid.app.frequentcontacts.R; import com.ferid.app.frequentcontacts.list.Contact; import com.ferid.app.frequentcontacts.prefs.PrefsUtil; import java.text.Collator; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Locale; /** * Created by ferid.cafer on 11/12/2014. */ public class SelectNumberActivity extends AppCompatActivity { private ArrayList<Contact> numberList = new ArrayList<>(); private NumberAdapter adapter; private ProgressBar progressBar; //whole number list, used for searching any contact private ArrayList<Contact> wholeArrayList = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.select_number); //init toolbar final Toolbar toolbar = findViewById(R.id.toolbar); setSupportActionBar(toolbar); if (getSupportActionBar() != null) { getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setHomeButtonEnabled(true); } //--- ListView list = findViewById(R.id.list); adapter = new NumberAdapter(this, R.layout.select_number_row, numberList); list.setAdapter(adapter); list.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) { Contact contact = numberList.get(position); //retrieve and set photo of the selected contact contact.setPhoto(retrievePhoto(contact.getId())); Intent intent = new Intent(); intent.putExtra("contact", contact); setResult(RESULT_OK, intent); closeWindow(); } }); progressBar = findViewById(R.id.progressBar); if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) { //if permission is already granted new NumberListRetriever().execute(); } } /** * Get names and number of contacts * @return */ private ArrayList<Contact> getNumbersList() { //keep track of added phones in order to handle redundancy ArrayList<String> addedPhoneNumbers = new ArrayList<>(); //block to show already frequent ones ArrayList<Contact> frequentContacts = PrefsUtil.readFrequentContacts(this); if (frequentContacts != null) { for (Contact cnt : frequentContacts) { addedPhoneNumbers.add(cnt.getNumber()); } } //contacts to be showed ArrayList<Contact> tmpList = new ArrayList<>(); Contact contact; ContentResolver cr = getContentResolver(); Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null); if (cur != null) { try { if (cur.getCount() > 0) { while (cur.moveToNext()) { //names int id = cur.getInt(cur.getColumnIndex(ContactsContract.Contacts._ID)); final String name = cur .getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); if (Integer.parseInt(cur .getString(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) { //phones Cursor phones = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI, new String[] { ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.TYPE }, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + id, null, null); if (phones != null) { while (phones.moveToNext()) { String phoneNumber = phones.getString( phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); //create a new Contact object contact = new Contact(); contact.setId(id); contact.setName(name); contact.setNumber(phoneNumber.replace(" ", "")); if (!TextUtils.isEmpty(contact.getNumber()) && !addedPhoneNumbers.contains(contact.getNumber())) { tmpList.add(contact); addedPhoneNumbers.add(contact.getNumber()); } } phones.close(); } } } } } catch (Exception e) { e.printStackTrace(); } finally { cur.close(); } } return tmpList; } /** * Retrieve photo of the given contact with contact ID * @param contactId * @return */ private String retrievePhoto(int contactId) { Uri contactUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactId); Uri photoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo.CONTENT_DIRECTORY); Cursor cursor = getContentResolver().query(photoUri, new String[] { ContactsContract.Contacts.Photo.PHOTO }, null, null, null); if (cursor == null) { return ""; } try { if (cursor.moveToFirst()) { byte[] data = cursor.getBlob(0); if (data != null) { //byte[] to String convertion return Base64.encodeToString(data, Base64.DEFAULT); } } } finally { cursor.close(); } return ""; } /** * Read data and refresh the list */ private class NumberListRetriever extends AsyncTask<Void, Void, ArrayList<Contact>> { @Override protected void onPreExecute() { progressBar.setVisibility(View.VISIBLE); } @Override protected ArrayList<Contact> doInBackground(Void... params) { //retrieve elements ArrayList<Contact> tmpList = getNumbersList(); //sort elements if (tmpList != null) { Collections.sort(tmpList, new ContactsComparator()); } //send to UI thread return tmpList; } @Override protected void onPostExecute(ArrayList<Contact> result) { if (result != null) { numberList.addAll(result); wholeArrayList.addAll(result); adapter.notifyDataSetChanged(); } progressBar.setVisibility(View.GONE); } } /** * Alphabetical order */ public class ContactsComparator implements Comparator<Contact> { //prepare utf-8 Collator collator = Collator.getInstance(new Locale("UTF-8")); @Override public int compare(Contact c1, Contact c2) { return collator.compare(c1.getName(), c2.getName()); } } /** * Run time searching * @param searchText */ private void searchEngine(final String searchText) { Handler handler = new Handler(); handler.post(new Runnable() { @Override public void run() { ArrayList<Contact> tmpList = new ArrayList<>(); //first, add names that start with searchText for (Contact location : wholeArrayList) { if (location.getName().toLowerCase().startsWith(searchText.toLowerCase())) { tmpList.add(location); } } //then, add names that contain searchText for (Contact location : wholeArrayList) { if (location.getName().toLowerCase().contains(searchText.toLowerCase()) && !location.getName().toLowerCase().startsWith(searchText.toLowerCase())) { tmpList.add(location); } } numberList.clear(); numberList.addAll(tmpList); adapter.notifyDataSetChanged(); } }); } private void closeWindow() { finish(); overridePendingTransition(R.anim.stand_still, R.anim.move_out_to_bottom); } @Override public void onBackPressed() { closeWindow(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_search, menu); SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); SearchView searchView = (SearchView) menu.findItem(R.id.ic_action_search).getActionView(); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String s) { return true; } @Override public boolean onQueryTextChange(String s) { if (s.length() >= 1) searchEngine(s); else { numberList.clear(); numberList.addAll(wholeArrayList); adapter.notifyDataSetChanged(); } return true; } }); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar actions click switch (item.getItemId()) { case android.R.id.home: closeWindow(); return true; default: return super.onOptionsItemSelected(item); } } }