├── .gitignore
├── .idea
├── gradle.xml
├── misc.xml
├── modules.xml
├── runConfigurations.xml
└── vcs.xml
├── README.md
├── app
├── .gitignore
├── build.gradle
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── dragosholban
│ │ └── com
│ │ └── timezoneconverter
│ │ └── ExampleInstrumentedTest.java
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── dragosholban
│ │ │ └── com
│ │ │ └── timezoneconverter
│ │ │ ├── DatePickerFragment.java
│ │ │ ├── MainActivity.java
│ │ │ ├── SelectTimezonesActivity.java
│ │ │ ├── TimeZoneActivity.java
│ │ │ └── TimeZoneAdapter.java
│ └── res
│ │ ├── drawable-v24
│ │ └── ic_launcher_foreground.xml
│ │ ├── drawable
│ │ └── ic_launcher_background.xml
│ │ ├── layout
│ │ ├── activity_main.xml
│ │ ├── activity_select_timezones.xml
│ │ └── activity_time_zone.xml
│ │ ├── menu
│ │ └── options_menu.xml
│ │ ├── mipmap-anydpi-v26
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.xml
│ │ ├── mipmap-hdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-mdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ └── values
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── styles.xml
│ └── test
│ └── java
│ └── dragosholban
│ └── com
│ └── timezoneconverter
│ └── ExampleUnitTest.java
├── build.gradle
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle
/.gitignore:
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2 | .gradle
3 | /local.properties
4 | /.idea/workspace.xml
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6 | .DS_Store
7 | /build
8 | /captures
9 | .externalNativeBuild
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/README.md:
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1 | # AndroidTimeZoneConverter
2 | This is the source code for the tutorial published on my website: [Build Your First Android App: A Time Zone Converter](https://dragosholban.com/2018/02/24/build-your-first-android-app-a-time-zone-converter/)
3 |
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/app/.gitignore:
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1 | /build
2 |
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 26
5 | defaultConfig {
6 | applicationId "dragosholban.com.timezoneconverter"
7 | minSdkVersion 16
8 | targetSdkVersion 26
9 | versionCode 1
10 | versionName "1.0"
11 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
12 | }
13 | buildTypes {
14 | release {
15 | minifyEnabled false
16 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
17 | }
18 | }
19 | }
20 |
21 | dependencies {
22 | implementation fileTree(dir: 'libs', include: ['*.jar'])
23 | implementation 'com.android.support:appcompat-v7:26.1.0'
24 | implementation 'com.android.support.constraint:constraint-layout:1.0.2'
25 | testImplementation 'junit:junit:4.12'
26 | androidTestImplementation 'com.android.support.test:runner:1.0.1'
27 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
28 | implementation 'com.android.support:design:26.1.0'
29 | }
30 |
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/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # You can control the set of applied configuration files using the
3 | # proguardFiles setting in build.gradle.
4 | #
5 | # For more details, see
6 | # http://developer.android.com/guide/developing/tools/proguard.html
7 |
8 | # If your project uses WebView with JS, uncomment the following
9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | # public *;
13 | #}
14 |
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 |
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile
22 |
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/app/src/androidTest/java/dragosholban/com/timezoneconverter/ExampleInstrumentedTest.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.content.Context;
4 | import android.support.test.InstrumentationRegistry;
5 | import android.support.test.runner.AndroidJUnit4;
6 |
7 | import org.junit.Test;
8 | import org.junit.runner.RunWith;
9 |
10 | import static org.junit.Assert.*;
11 |
12 | /**
13 | * Instrumented test, which will execute on an Android device.
14 | *
15 | * @see Testing documentation
16 | */
17 | @RunWith(AndroidJUnit4.class)
18 | public class ExampleInstrumentedTest {
19 | @Test
20 | public void useAppContext() throws Exception {
21 | // Context of the app under test.
22 | Context appContext = InstrumentationRegistry.getTargetContext();
23 |
24 | assertEquals("dragosholban.com.timezoneconverter", appContext.getPackageName());
25 | }
26 | }
27 |
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/app/src/main/AndroidManifest.xml:
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26 |
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/app/src/main/java/dragosholban/com/timezoneconverter/DatePickerFragment.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.app.DatePickerDialog;
4 | import android.app.Dialog;
5 | import android.app.DialogFragment;
6 | import android.os.Bundle;
7 | import android.widget.DatePicker;
8 |
9 | import java.util.Calendar;
10 | import java.util.Date;
11 |
12 | public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {
13 |
14 | @Override
15 | public Dialog onCreateDialog(Bundle savedInstanceState) {
16 | Calendar c = Calendar.getInstance();
17 | int year = c.get(Calendar.YEAR);
18 | int month = c.get(Calendar.MONTH);
19 | int day = c.get(Calendar.DAY_OF_MONTH);
20 |
21 | return new DatePickerDialog(getActivity(), this, year, month, day);
22 | }
23 |
24 | @Override
25 | public void onDateSet(DatePicker datePicker, int year, int month, int day) {
26 | ((MainActivity) getActivity()).setLocalDate(new Date(year - 1900, month, day));
27 | }
28 | }
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/app/src/main/java/dragosholban/com/timezoneconverter/MainActivity.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.app.DialogFragment;
4 | import android.content.Context;
5 | import android.content.Intent;
6 | import android.content.SharedPreferences;
7 | import android.support.v7.app.AppCompatActivity;
8 | import android.os.Bundle;
9 | import android.view.View;
10 | import android.widget.AdapterView;
11 | import android.widget.ArrayAdapter;
12 | import android.widget.Button;
13 | import android.widget.ListView;
14 | import android.widget.SeekBar;
15 | import android.widget.TextView;
16 |
17 | import java.text.DateFormat;
18 | import java.util.ArrayList;
19 | import java.util.Arrays;
20 | import java.util.Collections;
21 | import java.util.Comparator;
22 | import java.util.Date;
23 | import java.util.HashSet;
24 | import java.util.Set;
25 | import java.util.TimeZone;
26 |
27 | public class MainActivity extends AppCompatActivity {
28 | Date localDate = new Date();
29 | Button dateBtn;
30 | Button selectTimeZoneBtn;
31 | TimeZone userTimeZone;
32 | String[] selectedTimezones = new String[] {"Europe/Bucharest", "Europe/London", "Europe/Paris"};
33 | TimeZone selectedTimeZone;
34 | TextView convertedTimeTv;
35 | TextView convertedDateTv;
36 | ListView listView;
37 | ArrayAdapter adapter;
38 | SeekBar seekBar;
39 |
40 | private static int CHOOSE_TIME_ZONE_REQUEST_CODE = 1;
41 | private static int SELECT_TIME_ZONES_REQUEST_CODE = 2;
42 |
43 | @Override
44 | protected void onCreate(Bundle savedInstanceState) {
45 | super.onCreate(savedInstanceState);
46 | setContentView(R.layout.activity_main);
47 |
48 | loadPreferences();
49 |
50 | seekBar = findViewById(R.id.seekBar);
51 | final TextView userTime = findViewById(R.id.userTime);
52 | convertedTimeTv = findViewById(R.id.convertedTime);
53 | convertedDateTv = findViewById(R.id.convertedDate);
54 |
55 | seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
56 | @Override
57 | public void onProgressChanged(SeekBar seekBar, int i, boolean fromUser) {
58 | userTime.setText((seekBar.getProgress() < 10 ? "0" + Integer.toString(seekBar.getProgress()) : Integer.toString(seekBar.getProgress())) + ":00");
59 | localDate.setHours(seekBar.getProgress());
60 | if (fromUser) {
61 | localDate.setMinutes(0);
62 | }
63 | convertDate(userTimeZone, selectedTimeZone);
64 | }
65 |
66 | @Override
67 | public void onStartTrackingTouch(SeekBar seekBar) {
68 |
69 | }
70 |
71 | @Override
72 | public void onStopTrackingTouch(SeekBar seekBar) {
73 |
74 | }
75 | });
76 | seekBar.setProgress(localDate.getHours());
77 |
78 | dateBtn = findViewById(R.id.dateButton);
79 | dateBtn.setText(DateFormat.getDateInstance().format(localDate));
80 |
81 | selectTimeZoneBtn = findViewById(R.id.timeZoneButton);
82 |
83 | listView = findViewById(R.id.listView);
84 | setupAdapter();
85 | listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
86 | @Override
87 | public void onItemClick(AdapterView adapterView, View view, int i, long l) {
88 | selectedTimeZone = TimeZone.getTimeZone(selectedTimezones[i]);
89 | convertDate(userTimeZone, selectedTimeZone);
90 | savePreferences();
91 | }
92 | });
93 |
94 | if (userTimeZone != null) {
95 | selectTimeZoneBtn.setText(userTimeZone.getID());
96 | }
97 | if (selectedTimezones.length > 0 && selectedTimeZone != null) {
98 | int selectedTimeZonePosition = 0;
99 | for (int i = 0; i < this.selectedTimezones.length; i++) {
100 | if (selectedTimeZone.getID().equals(this.selectedTimezones[i])) {
101 | selectedTimeZonePosition = i;
102 | break;
103 | }
104 | }
105 | listView.setItemChecked(selectedTimeZonePosition, true);
106 | listView.setSelection(selectedTimeZonePosition);
107 | selectedTimeZone = TimeZone.getTimeZone(selectedTimezones[selectedTimeZonePosition]);
108 | }
109 | convertDate(userTimeZone, selectedTimeZone);
110 | }
111 |
112 | public void showDatePicker(View view) {
113 | DialogFragment dialog = new DatePickerFragment();
114 | dialog.show(getFragmentManager(), "datePicker");
115 | }
116 |
117 | public void setLocalDate(Date date) {
118 | // we need to keep the time on the date unchanged
119 | int hours = localDate.getHours();
120 | int minutes = localDate.getMinutes();
121 | localDate = date;
122 | localDate.setHours(hours);
123 | localDate.setMinutes(minutes);
124 | Button dateBtn = findViewById(R.id.dateButton);
125 | dateBtn.setText(DateFormat.getDateInstance().format(localDate));
126 | convertDate(userTimeZone, selectedTimeZone);
127 | }
128 |
129 | public void chooseTimezone(View view) {
130 | Intent intent = new Intent(this, TimeZoneActivity.class);
131 | startActivityForResult(intent, CHOOSE_TIME_ZONE_REQUEST_CODE);
132 | }
133 |
134 | @Override
135 | protected void onActivityResult(int requestCode, int resultCode, Intent data) {
136 | if(requestCode == CHOOSE_TIME_ZONE_REQUEST_CODE && resultCode == RESULT_OK) {
137 | String timezone = data.getStringExtra("timezone");
138 | selectTimeZoneBtn.setText(timezone);
139 | userTimeZone = TimeZone.getTimeZone(timezone);
140 | }
141 | if (requestCode == SELECT_TIME_ZONES_REQUEST_CODE && resultCode == RESULT_OK) {
142 | Bundle bundle = data.getBundleExtra("selectedTimezonesBundle");
143 | ArrayList selectedTimezonesArrayList = bundle.getStringArrayList("selectedTimezones");
144 | Collections.sort(selectedTimezonesArrayList, new Comparator() {
145 | @Override
146 | public int compare(String s, String t1) {
147 | return s.compareToIgnoreCase(t1);
148 | }
149 | });
150 | selectedTimezones = new String[selectedTimezonesArrayList.size()];
151 | selectedTimezonesArrayList.toArray(selectedTimezones);
152 | setupAdapter();
153 | }
154 | convertDate(userTimeZone, selectedTimeZone);
155 | savePreferences();
156 | }
157 |
158 | private void convertDate(TimeZone fromTimeZone, TimeZone toTimeZone) {
159 | if (fromTimeZone != null && toTimeZone != null) {
160 | long fromOffset = fromTimeZone.getOffset(localDate.getTime());
161 | long toOffset = toTimeZone.getOffset(localDate.getTime());
162 | long convertedTime = localDate.getTime() - (fromOffset - toOffset);
163 | Date convertedDate = new Date(convertedTime);
164 | int hours = convertedDate.getHours();
165 | int minutes = convertedDate.getMinutes();
166 | String time = (hours < 10 ? "0" + Integer.toString(hours) : Integer.toString(hours))
167 | + ":" + (minutes < 10 ? "0" + Integer.toString(minutes) : Integer.toString(minutes));
168 | convertedTimeTv.setText(time);
169 | convertedDateTv.setText(DateFormat.getDateInstance().format(convertedDate));
170 | }
171 | }
172 |
173 | public void selectTimezones(View view) {
174 | Bundle bundle = new Bundle();
175 | bundle.putStringArrayList("selectedTimezones", new ArrayList(Arrays.asList(selectedTimezones)));
176 | Intent intent = new Intent(this, SelectTimezonesActivity.class);
177 | intent.putExtra("selectedTimezonesBundle", bundle);
178 | startActivityForResult(intent, 2);
179 | }
180 |
181 | private void setupAdapter() {
182 | adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_activated_1, android.R.id.text1, selectedTimezones);
183 | listView.setAdapter(adapter);
184 | }
185 |
186 | private void savePreferences() {
187 | SharedPreferences preferences = this.getPreferences(Context.MODE_PRIVATE);
188 | SharedPreferences.Editor editor = preferences.edit();
189 |
190 | if (userTimeZone != null) {
191 | editor.putString("userTimezone", userTimeZone.getID());
192 | }
193 |
194 | if (selectedTimeZone != null) {
195 | editor.putString("selectedTimezone", selectedTimeZone.getID());
196 | }
197 |
198 | editor.putStringSet("selectedTimezones", new HashSet<>(Arrays.asList(selectedTimezones)));
199 |
200 | editor.commit();
201 | }
202 |
203 | private void loadPreferences() {
204 | SharedPreferences preferences = this.getPreferences(Context.MODE_PRIVATE);
205 |
206 | String userTimezone = preferences.getString("userTimezone", TimeZone.getDefault().getID());
207 | this.userTimeZone = TimeZone.getTimeZone(userTimezone);
208 |
209 | Set defaultSelectedTimezones = new HashSet<>(Arrays.asList(new String[] {"America/Los_Angeles", "America/New_York", "Asia/Hong_Kong", "Asia/Tokyo", "Europe/London", "Europe/Moscow", "Europe/Paris"}));
210 | Set selectedTimezones = preferences.getStringSet("selectedTimezones", defaultSelectedTimezones);
211 | ArrayList selectedTimezonesArrayList = new ArrayList<>(selectedTimezones);
212 | Collections.sort(selectedTimezonesArrayList, new Comparator() {
213 | @Override
214 | public int compare(String s, String t1) {
215 | return s.compareToIgnoreCase(t1);
216 | }
217 | });
218 | this.selectedTimezones = selectedTimezonesArrayList.toArray(new String[selectedTimezonesArrayList.size()]);
219 |
220 | String selectedTimezoneID = preferences.getString("selectedTimezone", null);
221 | if (selectedTimezoneID != null) {
222 | if (selectedTimezones.contains(selectedTimezoneID)) {
223 | this.selectedTimeZone = TimeZone.getTimeZone(selectedTimezoneID);
224 | }
225 | }
226 | }
227 |
228 | public void convertCurrentDate(View view) {
229 | localDate = new Date();
230 | convertDate(userTimeZone, selectedTimeZone);
231 | seekBar.setProgress(localDate.getHours());
232 | }
233 | }
234 |
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/app/src/main/java/dragosholban/com/timezoneconverter/SelectTimezonesActivity.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.content.Intent;
4 | import android.support.v4.view.MenuItemCompat;
5 | import android.support.v7.app.AppCompatActivity;
6 | import android.os.Bundle;
7 | import android.support.v7.widget.SearchView;
8 | import android.view.Menu;
9 | import android.view.MenuItem;
10 | import android.view.View;
11 | import android.widget.AdapterView;
12 | import android.widget.ArrayAdapter;
13 | import android.widget.Button;
14 | import android.widget.Filter;
15 | import android.widget.ListView;
16 |
17 | import java.util.ArrayList;
18 | import java.util.Arrays;
19 | import java.util.TimeZone;
20 |
21 | public class SelectTimezonesActivity extends AppCompatActivity {
22 | ArrayList selectedTimezones = new ArrayList<>();
23 | TimeZoneAdapter adapter;
24 | ArrayList timezones;
25 | ListView listView;
26 | boolean showAll = true;
27 |
28 | @Override
29 | protected void onCreate(Bundle savedInstanceState) {
30 | super.onCreate(savedInstanceState);
31 | setContentView(R.layout.activity_select_timezones);
32 |
33 | setTitle("Choose Time Zones");
34 |
35 | Intent intent = getIntent();
36 | Bundle bundle = intent.getBundleExtra("selectedTimezonesBundle");
37 | selectedTimezones = bundle.getStringArrayList("selectedTimezones");
38 | timezones = new ArrayList<>(Arrays.asList(TimeZone.getAvailableIDs()));
39 |
40 | listView = findViewById(R.id.listView);
41 | adapter = new TimeZoneAdapter(this, android.R.layout.simple_list_item_multiple_choice, android.R.id.text1, timezones);
42 | listView.setAdapter(adapter);
43 |
44 | listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
45 | @Override
46 | public void onItemClick(AdapterView adapterView, View view, int i, long l) {
47 | if (listView.isItemChecked(i)) {
48 | selectedTimezones.add(adapter.getItem(i));
49 | } else {
50 | selectedTimezones.remove(adapter.getItem(i));
51 | }
52 | }
53 | });
54 |
55 | checkSelectedTimezones();
56 | }
57 |
58 | public void done(View view) {
59 | Bundle bundle = new Bundle();
60 | bundle.putStringArrayList("selectedTimezones", selectedTimezones);
61 | Intent result = new Intent(this, MainActivity.class);
62 | result.putExtra("selectedTimezonesBundle", bundle);
63 | setResult(RESULT_OK, result);
64 | finish();
65 | }
66 |
67 | public void showChecked(View view) {
68 | Button button = (Button) view;
69 | adapter.clear();
70 | if (showAll) {
71 | for (String timezone : selectedTimezones) {
72 | adapter.add(timezone);
73 | }
74 | adapter.notifyDataSetChanged();
75 |
76 | button.setText("Show All");
77 | showAll = false;
78 | } else {
79 | for (String timezone : TimeZone.getAvailableIDs()) {
80 | adapter.add(timezone);
81 | }
82 | adapter.notifyDataSetChanged();
83 |
84 | button.setText("Show Checked");
85 | showAll = true;
86 | }
87 |
88 | checkSelectedTimezones();
89 | }
90 |
91 | public void uncheckAll(View view) {
92 | selectedTimezones.clear();
93 | checkSelectedTimezones();
94 | }
95 |
96 | private void checkSelectedTimezones() {
97 | for(int j = 0; j < adapter.getCount(); j++) {
98 | if (selectedTimezones.contains(adapter.getItem(j))) {
99 | listView.setItemChecked(j, true);
100 | } else {
101 | listView.setItemChecked(j, false);
102 | }
103 | }
104 | }
105 |
106 | @Override
107 | public boolean onCreateOptionsMenu(Menu menu) {
108 | getMenuInflater().inflate(R.menu.options_menu, menu);
109 |
110 | MenuItem searchItem = menu.findItem(R.id.action_search);
111 | SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
112 |
113 | searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
114 | @Override
115 | public boolean onQueryTextSubmit(String s) {
116 | return false;
117 | }
118 |
119 | @Override
120 | public boolean onQueryTextChange(String s) {
121 | adapter.getFilter().filter(s, new Filter.FilterListener() {
122 | @Override
123 | public void onFilterComplete(int i) {
124 | checkSelectedTimezones();
125 | }
126 | });
127 |
128 | return true;
129 | }
130 | });
131 |
132 | return true;
133 | }
134 | }
135 |
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/app/src/main/java/dragosholban/com/timezoneconverter/TimeZoneActivity.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.content.Intent;
4 | import android.support.v4.view.MenuItemCompat;
5 | import android.support.v7.app.AppCompatActivity;
6 | import android.os.Bundle;
7 | import android.support.v7.widget.SearchView;
8 | import android.view.Menu;
9 | import android.view.MenuItem;
10 | import android.view.View;
11 | import android.widget.AdapterView;
12 | import android.widget.ArrayAdapter;
13 | import android.widget.ListView;
14 |
15 | import java.util.ArrayList;
16 | import java.util.Arrays;
17 | import java.util.TimeZone;
18 |
19 | public class TimeZoneActivity extends AppCompatActivity {
20 | TimeZoneAdapter adapter;
21 |
22 | @Override
23 | protected void onCreate(Bundle savedInstanceState) {
24 | super.onCreate(savedInstanceState);
25 | setContentView(R.layout.activity_time_zone);
26 |
27 | ListView listView = findViewById(R.id.listView);
28 | final ArrayList timezones = new ArrayList<>(Arrays.asList(TimeZone.getAvailableIDs()));
29 | adapter = new TimeZoneAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1, timezones);
30 | listView.setAdapter(adapter);
31 |
32 | listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
33 | @Override
34 | public void onItemClick(AdapterView adapterView, View view, int i, long l) {
35 | Intent result = new Intent(getApplicationContext(), MainActivity.class);
36 | result.putExtra("timezone", timezones.get(i));
37 | setResult(RESULT_OK, result);
38 | finish();
39 | }
40 | });
41 | }
42 |
43 | @Override
44 | public boolean onCreateOptionsMenu(Menu menu) {
45 | getMenuInflater().inflate(R.menu.options_menu, menu);
46 |
47 | MenuItem searchItem = menu.findItem(R.id.action_search);
48 | SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
49 |
50 | searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
51 | @Override
52 | public boolean onQueryTextSubmit(String s) {
53 | return false;
54 | }
55 |
56 | @Override
57 | public boolean onQueryTextChange(String s) {
58 | adapter.getFilter().filter(s);
59 |
60 | return true;
61 | }
62 | });
63 |
64 | return true;
65 | }
66 | }
67 |
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/app/src/main/java/dragosholban/com/timezoneconverter/TimeZoneAdapter.java:
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1 | package dragosholban.com.timezoneconverter;
2 |
3 | import android.content.Context;
4 | import android.support.annotation.NonNull;
5 | import android.widget.ArrayAdapter;
6 | import android.widget.Filter;
7 |
8 | import java.util.ArrayList;
9 |
10 | public class TimeZoneAdapter extends ArrayAdapter {
11 |
12 | private ArrayList original;
13 | private Filter filter;
14 |
15 | public TimeZoneAdapter(@NonNull Context context, int resource, int textViewResourceId, @NonNull ArrayList objects) {
16 | super(context, resource, textViewResourceId, objects);
17 | original = new ArrayList<>(objects);
18 | }
19 |
20 | @NonNull
21 | @Override
22 | public Filter getFilter() {
23 | return new TimeZoneFilter();
24 | }
25 |
26 | private class TimeZoneFilter extends Filter {
27 |
28 | @Override
29 | protected FilterResults performFiltering(CharSequence charSequence) {
30 | FilterResults results = new FilterResults();
31 | ArrayList filtered = new ArrayList<>();
32 | String search = charSequence.toString().toLowerCase();
33 |
34 | if (search == null || search.length() == 0) {
35 | filtered = new ArrayList<>(original);
36 | } else {
37 | for (int i = 0; i < original.size(); i++) {
38 | if (original.get(i).toLowerCase().contains(charSequence)) {
39 | filtered.add(original.get(i));
40 | }
41 | }
42 | }
43 |
44 | results.values = filtered;
45 | results.count = filtered.size();
46 |
47 | return results;
48 | }
49 |
50 | @Override
51 | protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
52 | ArrayList items = (ArrayList) filterResults.values;
53 | clear();
54 | for (int i = 0; i < items.size(); i++) {
55 | add(items.get(i));
56 | }
57 |
58 | notifyDataSetChanged();
59 | }
60 | }
61 | }
62 |
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/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
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1 |
7 |
12 |
13 |
19 |