getListOfData();
34 |
35 | ListItem createNewListItem();
36 |
37 | void deleteListItem(ListItem listItem);
38 |
39 | void insertListItem(ListItem temporaryListItem);
40 | }
41 |
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/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/data/FakeDataSource.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.data;
20 |
21 | import java.util.ArrayList;
22 | import java.util.List;
23 | import java.util.Random;
24 |
25 | import forgettery.wiseass.com.recyclerviewprebuilt.R;
26 |
27 | /**
28 | * "Fake objects actually have working implementations, but usually take some shortcut which makes
29 | * them not suitable for production (an in memory database is a good example)."
30 | *
31 | * -Martin Fowler,
32 | * https://www.martinfowler.com/articles/mocksArentStubs.html
33 | *
34 | * Since this is a tutorial about building a RecyclerView, our Activity will be talking to a "Fake"
35 | * DataSource. As long as our "Fake" Data looks the same as the Data we'd expect from a "Real"
36 | * Datasource, we can use these Fakes to Test our App!
37 | *
38 | *
39 | * Created by R_KAY on 6/1/2017.
40 | */
41 |
42 | public class FakeDataSource implements DataSourceInterface{
43 |
44 | private static final int sizeOfCollection = 12;
45 | private Random random;
46 |
47 | private final String[] datesAndTimes = {
48 | "6:30AM 06/01/2017",
49 | "9:26PM 04/22/2013",
50 | "2:01PM 12/02/2015",
51 | "2:43AM 09/7/2018",
52 | };
53 |
54 | private final String[] messages = {
55 | "Check out content like Fragmented Podcast to expose yourself to the knowledge, ideas, " +
56 | "and opinions of experts in your field",
57 | "Look at Open Source Projects like Android Architecture Blueprints to see how experts" +
58 | " design and build Apps",
59 | "Write lots of Code and Example Apps. Writing good Quality Code in an efficient manner "
60 | + "is a Skill to be practiced like any other.",
61 | "If at first something doesn't make any sense, find another explanation. We all " +
62 | "learn/teach different from each other. Find an explanation that speaks to you."
63 | };
64 |
65 | private final int[] drawables = {
66 | R.drawable.green_drawable,
67 | R.drawable.red_drawable,
68 | R.drawable.blue_drawable,
69 | R.drawable.yellow_drawable
70 | };
71 |
72 |
73 | public FakeDataSource() {
74 | random = new Random();
75 | }
76 |
77 | /**
78 | * Creates a list of ListItems.
79 | *
80 | * @return A list of 12 semi-random ListItems for testing purposes
81 | */
82 | @Override
83 | public List getListOfData() {
84 | ArrayList listOfData = new ArrayList<>();
85 | Random random = new Random();
86 | //make 12 semi-random items
87 | for (int i = 0; i < 12; i++) {
88 |
89 | listOfData.add(
90 | createNewListItem()
91 | );
92 | }
93 |
94 | return listOfData;
95 | }
96 |
97 | @Override
98 | public ListItem createNewListItem() {
99 |
100 | //these will be 0, 1, 2, or 3
101 | int randOne = random.nextInt(4);
102 | int randTwo = random.nextInt(4);
103 | int randThree = random.nextInt(4);
104 |
105 | //creates a semi-random ListItem
106 | ListItem listItem = new ListItem(
107 | datesAndTimes[randOne],
108 | messages[randTwo],
109 | drawables[randThree]
110 | );
111 |
112 | return listItem;
113 | }
114 |
115 | @Override
116 | public void deleteListItem(ListItem listItem) {
117 |
118 | }
119 |
120 | @Override
121 | public void insertListItem(ListItem temporaryListItem) {
122 |
123 | }
124 | }
125 |
--------------------------------------------------------------------------------
/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/data/ListItem.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.data;
20 |
21 | /**
22 | * 3.
23 | * This class describes an "Item" of "Data". In a real App, I'd call them things like:
24 | * - Workout
25 | * - Reminder
26 | * - Task
27 | * - Note
28 | * - User
29 | *
30 | * Created by R_KAY on 5/31/2017.
31 | */
32 |
33 | public class ListItem {
34 |
35 | private String dateAndTime;
36 | private String message;
37 | private int colorResource;
38 |
39 | /*It's common for an "Item" to have a unique Id for storing an a Database
40 | private String uniqueIdentifier;*/
41 |
42 | public ListItem(String dateAndTime, String message, int colorResource) {
43 | this.dateAndTime = dateAndTime;
44 | this.message = message;
45 | this.colorResource = colorResource;
46 | }
47 |
48 | public int getColorResource() {
49 | return colorResource;
50 | }
51 |
52 | public void setColorResource(int colorResource) {
53 | this.colorResource = colorResource;
54 | }
55 |
56 | public String getDateAndTime() {
57 | return dateAndTime;
58 | }
59 |
60 | public void setDateAndTime(String dateAndTime) {
61 | this.dateAndTime = dateAndTime;
62 | }
63 |
64 |
65 | public String getMessage() {
66 | return message;
67 | }
68 |
69 | public void setMessage(String message) {
70 | this.message = message;
71 | }
72 | }
73 |
--------------------------------------------------------------------------------
/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/logic/Controller.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.logic;
20 |
21 | import android.view.View;
22 |
23 | import forgettery.wiseass.com.recyclerviewprebuilt.data.DataSourceInterface;
24 | import forgettery.wiseass.com.recyclerviewprebuilt.data.ListItem;
25 | import forgettery.wiseass.com.recyclerviewprebuilt.view.ViewInterface;
26 |
27 | /**
28 | * 16.
29 | * It's an unfortunate fact that in Programming, people like to use many names for the same thing,
30 | * and one name for many things at the same time. I would normally call a class like this a
31 | * "Presenter", since I currently use Model-View-Presenter (Passive View) style Architecture in my
32 | * own Apps. However, since this isn't an MVP App but a RecyclerView tutorial which is likely to be
33 | * watched by a fair number of Beginners, let me explain this a little further:
34 | *
35 | * Whether it's MVP, MVC, MVVM, etc., a rough (and INCOMPLETE!!!) idea of how these three layer
36 | * Architectures seperate their concerns (what they do) is:
37 | *
38 | * 1. Drawing things on the Screen and Listening for Click Events Layer. In Android, this will
39 | * almost always be a Fragment or Activity (although there are other options to create Views with
40 | * 3rd Party Libs). Most Architectures will call this the "View". In most cases, it doesn't
41 | * make it's own decisions, but simply passes "Events" to Layer 2, and let's Layer 2 do the
42 | * thinking.
43 | *
44 | * 2. Decision Making and Communication Layer. This Layer will generally have the responsibility of
45 | * coordinating "Events" from other Layers, such as a "Click" on the UI, or an Error Message from
46 | * the Database. It receives these events, and then using Logic, decides how the App will respond to
47 | * such events. It turns out that if you write your App well, there will be a relatively finite
48 | * number of "Events" and "Decisions" we can choose based on those events. Controller and Presenter
49 | * are common names for Classes in this Layer, but at this point there seems very little consistency
50 | * for naming this Layer.
51 | *
52 | *
53 | * 3. Data Layer. This Layer manages access to a Database/Repository of some kind. It could be Local
54 | * (stored on the device) or it could be remote (cloud storage). Generally it will just manage
55 | * whatever Database it is using, and provide Layer 2 with Methods it can use to Create, Read,
56 | * Update, Delete (CRUD) Data, and error Messages from the Database.
57 | *
58 | * Created by R_KAY on 6/3/2017.
59 | */
60 |
61 | public class Controller {
62 |
63 | private ListItem temporaryListItem;
64 | private int temporaryListItemPosition;
65 |
66 | /*
67 | All that's going on with these Variables, is that we're talking to both ListActivity and
68 | FakeDataSource through Interfaces. This has many benefits, but I'd invite you to research
69 | "Code to an Interface" for a fairly clear example.
70 | */
71 | private ViewInterface view;
72 |
73 |
74 | private DataSourceInterface dataSource;
75 |
76 | /**
77 | * As soon as this object is created, it does a few things:
78 | * 1. Assigns Interfaces Variables so that it can talk to the DataSource and that Activity
79 | * 2. Tells the dataSource to fetch a List of ListItems.
80 | * 3. Tells the View to draw the fetched List of Data.
81 | * @param view
82 | * @param dataSource
83 | */
84 | public Controller(ViewInterface view, DataSourceInterface dataSource) {
85 | this.view = view;
86 | this.dataSource = dataSource;
87 |
88 | getListFromDataSource();
89 | }
90 |
91 | public void onListItemClick(ListItem selectedItem, View viewRoot){
92 | view.startDetailActivity(
93 | selectedItem.getDateAndTime(),
94 | selectedItem.getMessage(),
95 | selectedItem.getColorResource(),
96 | viewRoot
97 | );
98 | }
99 |
100 | /**
101 | * In a real App, I would normally talk to this DataSource using RxJava 2. This is because most
102 | * calls to Services like a Database/Server should be executed on a seperate thread that the
103 | * mainThread (UI Thread). See my full projects for examples of this.
104 | */
105 | public void getListFromDataSource(){
106 | view.setUpAdapterAndView(
107 | dataSource.getListOfData()
108 | );
109 | }
110 |
111 |
112 | public void createNewListItem() {
113 | /*
114 | To simulate telling the DataSource to create a new record and waiting for it's response,
115 | we'll simply have it return a new ListItem.
116 |
117 | In a real App, I'd use RxJava 2 (or some other
118 | API/Framework for Asynchronous Communication) to have the Datasource do this on the
119 | IO thread, and respond via an Asynchronous callback to the Main thread.
120 | */
121 |
122 | ListItem newItem = dataSource.createNewListItem();
123 |
124 | view.addNewListItemToView(newItem);
125 | }
126 |
127 | public void onListItemSwiped(int position, ListItem listItem) {
128 | //ensure that the view and data layers have consistent state
129 | dataSource.deleteListItem(listItem);
130 | view.deleteListItemAt(position);
131 |
132 | temporaryListItemPosition = position;
133 | temporaryListItem = listItem;
134 |
135 | view.showUndoSnackbar();
136 |
137 | }
138 |
139 | public void onUndoConfirmed() {
140 | if (temporaryListItem != null){
141 | //ensure View/Data consistency
142 | dataSource.insertListItem(temporaryListItem);
143 | view.insertListItemAt(temporaryListItemPosition, temporaryListItem);
144 |
145 | temporaryListItem = null;
146 | temporaryListItemPosition = 0;
147 |
148 | } else {
149 |
150 | }
151 |
152 | }
153 |
154 | public void onSnackbarTimeout() {
155 | temporaryListItem = null;
156 | temporaryListItemPosition = 0;
157 | }
158 | }
159 |
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/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/view/DetailActivity.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.view;
20 |
21 | import android.content.Intent;
22 | import android.os.Bundle;
23 | import android.support.v4.content.ContextCompat;
24 | import android.support.v7.app.AppCompatActivity;
25 | import android.view.View;
26 | import android.widget.TextView;
27 |
28 | import forgettery.wiseass.com.recyclerviewprebuilt.R;
29 |
30 | /**
31 | * 18.
32 | *
33 | * This Activity simply displays Data from a ListItem in a "Detailed" View.
34 | * Although I'd still give it it's own Presenter/Controller/Whatever in a real App, I won't bother
35 | * doing that here since the Activity is so simplistic anyway.
36 | * Created by R_KAY on 6/3/2017.
37 | */
38 |
39 | public class DetailActivity extends AppCompatActivity {
40 |
41 | private static final String EXTRA_DATE_AND_TIME = "EXTRA_DATE_AND_TIME";
42 | private static final String EXTRA_MESSAGE = "EXTRA_MESSAGE";
43 | private static final String EXTRA_DRAWABLE = "EXTRA_DRAWABLE";
44 |
45 | private TextView dateAndTime;
46 | private TextView message;
47 | private View coloredBackground;
48 |
49 | @Override
50 | protected void onCreate(Bundle savedInstanceState) {
51 | super.onCreate(savedInstanceState);
52 | setContentView(R.layout.activity_detail);
53 |
54 | /*I wouldn't normally pass all this Data via Intent, so understand that this is just a quick
55 | implementation to get things working for the Demo. I'd normally pass just a Unique id as an
56 | extra, and then retrieve the appropriate Data from a Service.*/
57 | Intent i = getIntent();
58 | String dateAndTimeExtra = i.getStringExtra(EXTRA_DATE_AND_TIME);
59 | String messageExtra = i.getStringExtra(EXTRA_MESSAGE);
60 | int drawableResourceExtra = i.getIntExtra(EXTRA_DRAWABLE, 0);
61 |
62 | dateAndTime = (TextView) findViewById(R.id.lbl_date_and_time_header);
63 | dateAndTime.setText(dateAndTimeExtra);
64 |
65 | message = (TextView) findViewById(R.id.lbl_message_body);
66 | message.setText(messageExtra);
67 |
68 | coloredBackground = findViewById(R.id.imv_colored_background);
69 | coloredBackground.setBackgroundResource(
70 | drawableResourceExtra
71 | );
72 |
73 |
74 |
75 | }
76 | }
77 |
--------------------------------------------------------------------------------
/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/view/ListActivity.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.view;
20 |
21 | import android.app.ActivityOptions;
22 | import android.content.Intent;
23 | import android.os.Build;
24 | import android.os.Bundle;
25 | import android.support.design.widget.BaseTransientBottomBar;
26 | import android.support.design.widget.FloatingActionButton;
27 | import android.support.design.widget.Snackbar;
28 | import android.support.v4.content.ContextCompat;
29 | import android.support.v7.app.AppCompatActivity;
30 | import android.support.v7.widget.DividerItemDecoration;
31 | import android.support.v7.widget.LinearLayoutManager;
32 | import android.support.v7.widget.RecyclerView;
33 | import android.support.v7.widget.Toolbar;
34 | import android.support.v7.widget.helper.ItemTouchHelper;
35 | import android.transition.Fade;
36 | import android.util.Pair;
37 | import android.view.LayoutInflater;
38 | import android.view.View;
39 | import android.view.ViewGroup;
40 | import android.widget.ProgressBar;
41 | import android.widget.TextView;
42 |
43 | import java.util.List;
44 |
45 | import de.hdodenhof.circleimageview.CircleImageView;
46 | import forgettery.wiseass.com.recyclerviewprebuilt.R;
47 | import forgettery.wiseass.com.recyclerviewprebuilt.data.FakeDataSource;
48 | import forgettery.wiseass.com.recyclerviewprebuilt.data.ListItem;
49 | import forgettery.wiseass.com.recyclerviewprebuilt.logic.Controller;
50 |
51 | /**
52 | * 1.
53 | * List Activity is responsible for
54 | * - Coordinating the User Interface
55 | * - Relaying Click events to the Controller
56 | * - Starting a Detail Activity
57 | * -
58 | */
59 | public class ListActivity extends AppCompatActivity implements ViewInterface, View.OnClickListener {
60 |
61 | private static final String EXTRA_DATE_AND_TIME = "EXTRA_DATE_AND_TIME";
62 | private static final String EXTRA_MESSAGE = "EXTRA_MESSAGE";
63 | private static final String EXTRA_DRAWABLE = "EXTRA_DRAWABLE";
64 |
65 | /**
66 | * 2.
67 | * Obviously you wouldn't use such an ambiguous name in a non-demo App.
68 | */
69 | private List listOfData;
70 |
71 | //12. In order to create each ViewHolder in the UI, we need a LayoutInflater.
72 | private LayoutInflater layoutInflater;
73 | private RecyclerView recyclerView;
74 | private CustomAdapter adapter;
75 | private Toolbar toolbar;
76 |
77 | private Controller controller;
78 |
79 | @Override
80 | protected void onCreate(Bundle savedInstanceState) {
81 | super.onCreate(savedInstanceState);
82 | setContentView(R.layout.activity_list);
83 |
84 | recyclerView = (RecyclerView) findViewById(R.id.rec_list_activity);
85 | layoutInflater = getLayoutInflater();
86 | toolbar = (Toolbar) findViewById(R.id.tlb_list_activity);
87 |
88 | toolbar.setTitle(R.string.title_toolbar);
89 | toolbar.setLogo(R.drawable.ic_view_list_white_24dp);
90 | toolbar.setTitleMarginStart(72);
91 |
92 | FloatingActionButton fabulous = (FloatingActionButton) findViewById(R.id.fab_create_new_item);
93 |
94 | fabulous.setOnClickListener(this);
95 |
96 | controller = new Controller(this, new FakeDataSource());
97 | }
98 |
99 | /**
100 | * 17.
101 | * So, I'd normally just pass an Item's Unique ID (Key) to the other Activity, and then fetch
102 | * the Item from the Database their. However, this is a RecyclerView Demo App and I'm going to
103 | * simplify things like this. Also, by decomposing ListItem, it saves me having to make ListItem
104 | * Parcelable and bla bla bla whatever.
105 | *
106 | * @param dateAndTime
107 | * @param message
108 | * @param colorResource
109 | */
110 | @Override
111 | public void startDetailActivity(String dateAndTime, String message, int colorResource, View viewRoot) {
112 | Intent i = new Intent(this, DetailActivity.class);
113 | i.putExtra(EXTRA_DATE_AND_TIME, dateAndTime);
114 | i.putExtra(EXTRA_MESSAGE, message);
115 | i.putExtra(EXTRA_DRAWABLE, colorResource);
116 |
117 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
118 | getWindow().setEnterTransition(new Fade(Fade.IN));
119 | getWindow().setEnterTransition(new Fade(Fade.OUT));
120 |
121 | ActivityOptions options = ActivityOptions
122 | .makeSceneTransitionAnimation(this,
123 | new Pair(viewRoot.findViewById(R.id.imv_list_item_circle),
124 | getString(R.string.transition_drawable)),
125 | new Pair(viewRoot.findViewById(R.id.lbl_message),
126 | getString(R.string.transition_message)),
127 | new Pair(viewRoot.findViewById(R.id.lbl_date_and_time),
128 | getString(R.string.transition_time_and_date)));
129 |
130 | startActivity(i, options.toBundle());
131 |
132 |
133 | } else {
134 | startActivity(i);
135 | }
136 | }
137 |
138 |
139 | /**
140 | * In order to make sure things execute in the proper order, we have our Controller tell the
141 | * View when to set up it's stuff.
142 | *
143 | * @param listOfData
144 | */
145 | @Override
146 | public void setUpAdapterAndView(List listOfData) {
147 | this.listOfData = listOfData;
148 | LinearLayoutManager layoutManager = new LinearLayoutManager(this);
149 |
150 | recyclerView.setLayoutManager(layoutManager);
151 |
152 | adapter = new CustomAdapter();
153 | recyclerView.setAdapter(adapter);
154 |
155 | DividerItemDecoration itemDecoration = new DividerItemDecoration(
156 | recyclerView.getContext(),
157 | layoutManager.getOrientation()
158 | );
159 |
160 | itemDecoration.setDrawable(
161 | ContextCompat.getDrawable(
162 | ListActivity.this,
163 | R.drawable.divider_white
164 | )
165 | );
166 |
167 | recyclerView.addItemDecoration(
168 | itemDecoration
169 | );
170 |
171 | ItemTouchHelper itemTouchHelper = new ItemTouchHelper(createHelperCallback());
172 | itemTouchHelper.attachToRecyclerView(recyclerView);
173 |
174 |
175 | }
176 |
177 | @Override
178 | public void addNewListItemToView(ListItem newItem) {
179 | listOfData.add(newItem);
180 |
181 | int endOfList = listOfData.size() - 1;
182 |
183 | adapter.notifyItemInserted(endOfList);
184 |
185 | recyclerView.smoothScrollToPosition(endOfList);
186 | }
187 |
188 | @Override
189 | public void deleteListItemAt(int position) {
190 | listOfData.remove(position);
191 |
192 | adapter.notifyItemRemoved(position);
193 | }
194 |
195 | @Override
196 | public void showUndoSnackbar() {
197 | Snackbar.make(
198 | findViewById(R.id.root_list_activity),
199 | getString(R.string.action_delete_item),
200 | Snackbar.LENGTH_LONG
201 | )
202 | .setAction(R.string.action_undo, new View.OnClickListener() {
203 | @Override
204 | public void onClick(View v) {
205 | controller.onUndoConfirmed();
206 | }
207 | })
208 | .addCallback(new BaseTransientBottomBar.BaseCallback() {
209 | @Override
210 | public void onDismissed(Snackbar transientBottomBar, int event) {
211 | super.onDismissed(transientBottomBar, event);
212 |
213 | controller.onSnackbarTimeout();
214 | }
215 | })
216 | .show();
217 | }
218 |
219 | @Override
220 | public void insertListItemAt(int position, ListItem listItem) {
221 | listOfData.add(position, listItem);
222 |
223 | adapter.notifyItemInserted(position);
224 | }
225 |
226 | @Override
227 | public void onClick(View v) {
228 | int viewId = v.getId();
229 | if (viewId == R.id.fab_create_new_item) {
230 | //User wishes to creat a new RecyclerView Item
231 | controller.createNewListItem();
232 | }
233 | }
234 |
235 | /**
236 | * 4.
237 | * (Opinion)
238 | * Why is the Adapter inside the Activity (a.k.a. a Nested Class)?
239 | *
240 | * I used to pull this Class outside of the Activity and have it communicate back to the
241 | * Activity via Interface. This was actually detrimental in retrospect, as I ended up having to
242 | * manage a List of Data in the Activity, as well as a copy List of Data in the Adapter itself.
243 | *
244 | * Also, since I needed to have my ViewHolder implement an OnClickListener, and then have the
245 | * result of that talk to the Activity through another interface, it was pretty confusing to
246 | * Beginners (not to mention pointless).
247 | *
248 | * That being said, you don't *have* to nest the Adapter. Do what makes sense for the Software
249 | * Architecture in front of you.
250 | */
251 | private class CustomAdapter extends RecyclerView.Adapter {//6
252 |
253 | /**
254 | * 13.
255 | * Inflates a new View (in this case, R.layout.item_data), and then creates/returns a new
256 | * CustomViewHolder object.
257 | *
258 | * @param parent Unfortunately the docs currently don't explain this at all :(
259 | * @param viewType Unfortunately the docs currently don't explain this at all :(
260 | * @return
261 | */
262 | @Override
263 | public CustomAdapter.CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
264 | View v = layoutInflater.inflate(R.layout.item_data, parent, false);
265 | return new CustomViewHolder(v);
266 | }
267 |
268 | /**
269 | * This method "Binds" or assigns Data (from listOfData) to each View (ViewHolder).
270 | *
271 | * @param holder The current ViewHolder instance for a given position
272 | * @param position The current position of the ViewHolder we are Binding to, based upon
273 | * our (listOfData). So for the second ViewHolder we create, we'll bind data
274 | * from the second Item in listOfData.
275 | */
276 | @Override
277 | public void onBindViewHolder(CustomAdapter.CustomViewHolder holder, int position) {
278 | //11. and now the ViewHolder data
279 | ListItem currentItem = listOfData.get(position);
280 |
281 | holder.coloredCircle.setImageResource(
282 | currentItem.getColorResource()
283 | );
284 |
285 | holder.message.setText(
286 | currentItem.getMessage()
287 | );
288 |
289 | holder.dateAndTime.setText(
290 | currentItem.getDateAndTime()
291 | );
292 |
293 | holder.loading.setVisibility(View.INVISIBLE);
294 | }
295 |
296 | /**
297 | * This method let's our Adapter determine how many ViewHolders it needs to create, based on
298 | * the size of the Dataset (List) which it is working with.
299 | *
300 | * @return the size of the dataset, generally via List.size()
301 | */
302 | @Override
303 | public int getItemCount() {
304 | // 12. Returning 0 here will tell our Adapter not to make any Items. Let's fix that.
305 | return listOfData.size();
306 | }
307 |
308 | /**
309 | * 5.
310 | * Each ViewHolder contains Bindings to the Views we wish to populate with Data.
311 | */
312 | class CustomViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
313 |
314 | //10. now that we've made our layouts, let's bind them
315 | private CircleImageView coloredCircle;
316 | private TextView dateAndTime;
317 | private TextView message;
318 | private ViewGroup container;
319 | private ProgressBar loading;
320 |
321 | public CustomViewHolder(View itemView) {
322 | super(itemView);
323 | this.coloredCircle = (CircleImageView) itemView.findViewById(R.id.imv_list_item_circle);
324 | this.dateAndTime = (TextView) itemView.findViewById(R.id.lbl_date_and_time);
325 | this.message = (TextView) itemView.findViewById(R.id.lbl_message);
326 | this.loading = (ProgressBar) itemView.findViewById(R.id.pro_item_data);
327 |
328 | this.container = (ViewGroup) itemView.findViewById(R.id.root_list_item);
329 | /*
330 | We can pass "this" as an Argument, because "this", which refers to the Current
331 | Instance of type CustomViewHolder currently conforms to (implements) the
332 | View.OnClickListener interface. I have a Video on my channel which goes into
333 | Interfaces with Detailed Examples.
334 |
335 | Search "Android WTF: Java Interfaces by Example"
336 | */
337 | this.container.setOnClickListener(this);
338 | }
339 |
340 | /**
341 | * 6.
342 | * Since I'm ok with the whole Container being the Listener, View v isn't super useful
343 | * in this Use Case. However, if I had a Single RecyclerView Item with multiple
344 | * Clickable Views, I could use v.getId() to tell which specific View was clicked.
345 | * See the comment within the method.
346 | *
347 | * @param v
348 | */
349 | @Override
350 | public void onClick(View v) {
351 | //getAdapterPosition() get's an Integer based on which the position of the current
352 | //ViewHolder (this) in the Adapter. This is how we get the correct Data.
353 | ListItem listItem = listOfData.get(
354 | this.getAdapterPosition()
355 | );
356 |
357 | controller.onListItemClick(
358 | listItem,
359 | v
360 | );
361 |
362 | }
363 | }
364 | }
365 |
366 | private ItemTouchHelper.Callback createHelperCallback() {
367 | /*First Param is for Up/Down motion, second is for Left/Right.
368 | Note that we can supply 0, one constant (e.g. ItemTouchHelper.LEFT), or two constants (e.g.
369 | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) to specify what directions are allowed.
370 | */
371 | ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(
372 | 0,
373 | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
374 |
375 | //not used, as the first parameter above is 0
376 | @Override
377 | public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder,
378 | RecyclerView.ViewHolder target) {
379 | return false;
380 | }
381 |
382 |
383 | @Override
384 | public void onSwiped(final RecyclerView.ViewHolder viewHolder, int swipeDir) {
385 | int position = viewHolder.getAdapterPosition();
386 | controller.onListItemSwiped(
387 | position,
388 | listOfData.get(position)
389 | );
390 | }
391 | };
392 |
393 | return simpleItemTouchCallback;
394 | }
395 | }
396 |
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/app/src/main/java/forgettery/wiseass/com/recyclerviewprebuilt/view/ViewInterface.java:
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1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt.view;
20 |
21 | import android.view.View;
22 |
23 | import java.util.List;
24 |
25 | import forgettery.wiseass.com.recyclerviewprebuilt.data.ListItem;
26 |
27 | /**
28 | * This Interface is the Contract which dictates how our View and Presenter can talk to each other.
29 | *
30 | * @see Android Java Interfaces by Example
31 | * Created by R_KAY on 6/3/2017.
32 | */
33 |
34 | public interface ViewInterface {
35 |
36 | void startDetailActivity(String dateAndTime, String message, int colorResource, View viewRoot);
37 |
38 | void setUpAdapterAndView(List listOfData);
39 |
40 | void addNewListItemToView(ListItem newItem);
41 |
42 | void deleteListItemAt(int position);
43 |
44 | void showUndoSnackbar();
45 |
46 | void insertListItemAt(int temporaryListItemPosition, ListItem temporaryListItem);
47 | }
48 |
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66 |
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2 |
19 |
20 |
21 | #121212
22 | #000000
23 | #80D8FF
24 | #121212
25 |
26 |
27 | #52000000
28 | #52FFFFFF
29 |
30 | #FF0000
31 | #0000FF
32 | #00FF00
33 | #FFEB3B
34 |
35 |
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/app/src/main/res/values/strings.xml:
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1 |
18 |
19 |
20 | RecyclerViewPrebuilt
21 | Item Deleted
22 | UNDO?
23 |
24 |
25 | drawable
26 | message
27 | date
28 | List Activity
29 |
30 |
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/app/src/test/java/forgettery/wiseass/com/recyclerviewprebuilt/ControllerUnitTest.java:
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1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt;
20 |
21 | import android.view.View;
22 |
23 | import org.junit.Before;
24 | import org.junit.Test;
25 | import org.junit.runner.RunWith;
26 | import org.mockito.Mock;
27 | import org.mockito.Mockito;
28 | import org.mockito.junit.MockitoJUnitRunner;
29 |
30 | import java.util.ArrayList;
31 | import java.util.List;
32 |
33 | import forgettery.wiseass.com.recyclerviewprebuilt.data.DataSourceInterface;
34 | import forgettery.wiseass.com.recyclerviewprebuilt.data.ListItem;
35 | import forgettery.wiseass.com.recyclerviewprebuilt.logic.Controller;
36 | import forgettery.wiseass.com.recyclerviewprebuilt.view.ViewInterface;
37 |
38 | /**
39 | * Test Driven Development Bonus: Before writing the methods themselves (a.k.a. writing the
40 | * "Implementation"), I've written some Unit Tests. In a nutshell, these Tests help me to figure out
41 | * what methods and logic I'll need for the class which I'm testing. This process is slow at first,
42 | * but once you become fast at writing Tests, you'll start to see how they actually help you write
43 | * Better Code, often at a Faster Pace.
44 | *
45 | * I have some Videos on this topic on my youtube channel. Check them out for more info.
46 | */
47 | @RunWith(MockitoJUnitRunner.class)
48 | public class ControllerUnitTest {
49 |
50 | //We technically could've just used the FakeDataSource here, but you don't always want to use
51 | //Mocks over Fakes and vice versa. Depends on your use case.
52 | @Mock
53 | DataSourceInterface dataSource;
54 |
55 | @Mock
56 | ViewInterface view;
57 |
58 | @Mock
59 | View testViewRoot;
60 |
61 | /**
62 | * Often times we'll want data to run our tests against. I like to define such Data as a series
63 | * of Static variables in the Test file itself for convenience.
64 | */
65 | private static final ListItem TEST_ITEM = new ListItem(
66 | "6:30AM 06/01/2017",
67 | "Look at Open Source Projects",
68 | R.drawable.red_drawable);
69 |
70 |
71 | private static final int POSITION = 3;
72 |
73 | /**
74 | * Since we're testing our Controller Class, this one is the Real implementation!
75 | * How this works is we make a Real instance of the Controller talk to Fake Instances of
76 | * what it would normally talk to (i.e. our Mocks above). Since the Controller does most of the
77 | * thinking (Logic), it follows that it would benefit the most from a good suite of Tests.
78 | */
79 | Controller controller;
80 |
81 | /**
82 | * the @Before annotation makes this Code run before the Tests themselves. You can use this
83 | * to initialize the different components of your Test, should you need to. You can also
84 | * initialize things in the Test methods themselves. Whatever works best for your Use Case.
85 | */
86 | @Before
87 | public void setUpTest() {
88 | controller = new Controller(view, dataSource);
89 | }
90 |
91 | @Test
92 | public void onGetListDataSuccessful() {
93 | //Since we require a List to be returned by the dataSource, we can define it here:
94 | List listOfData = new ArrayList<>();
95 | listOfData.add(TEST_ITEM);
96 |
97 |
98 | //This is where we tell our "Mocks" what to do when our Controller talks to them. Since they
99 | //aren't real objects, we must tell them exactly what to do if we want responses from them.
100 | Mockito.when(dataSource.getListOfData())
101 | .thenReturn(listOfData);
102 |
103 | //This is the method we are testing
104 | controller.getListFromDataSource();
105 |
106 | //Check how the Tested Class responds to the data it receives
107 | //or test it's behaviour
108 | Mockito.verify(view).setUpAdapterAndView(listOfData);
109 | }
110 |
111 |
112 |
113 | @Test
114 | public void onListItemClicked() {
115 | controller.onListItemClick(TEST_ITEM, testViewRoot);
116 |
117 | Mockito.verify(view).startDetailActivity(
118 | TEST_ITEM.getDateAndTime(),
119 | TEST_ITEM.getMessage(),
120 | TEST_ITEM.getColorResource(),
121 | testViewRoot);
122 | }
123 |
124 |
125 | // @Test
126 | // public void onGetListDataUnsuccessful() {
127 | /**************************
128 | *
129 | * Unit Test Homework:
130 | *
131 | * Implement the "View", so that when we don't recieve a List, it shows some kind of
132 | * error message to the user. This is common practice that you should learn!
133 | *
134 | * I've written some hints you'll have to decipher into Java code:
135 | *************************/
136 | //1 Set up your Mock dataSource
137 |
138 | //2 Call the method you wish to test on the Controller
139 |
140 | //3 Verify that the View has been told to show a message (I'd suggest showing a Toast for now)
141 |
142 | //Profit???
143 |
144 | // }
145 |
146 | @Test
147 | public void onCreateNewListItemClick() {
148 | //1 Set up your Mock dataSource
149 | Mockito.when(dataSource.createNewListItem())
150 | .thenReturn(TEST_ITEM);
151 |
152 | //2 Call the method you wish to test on the Controller
153 | controller.createNewListItem();
154 |
155 | //3 Verify the behaviour of the View, based on the event
156 | Mockito.verify(view).addNewListItemToView(
157 | TEST_ITEM
158 | );
159 | }
160 |
161 | /**
162 | * User has swiped to delete an Item from the List. Since this operation may be accidental, it
163 | * is necessary to provide a way for the User to Undo this operation. For now, we will
164 | * 1. Temporarily store ListItem and position in adapter
165 | * 2. Tell the Datasource to delete the Item (this ensures view/data layer consistency as much as
166 | * possible)
167 | *
168 | * After that, the user will either undo, or the snackbar dialog will timeout (see tests below)
169 | */
170 | @Test
171 | public void onListItemSwiped() {
172 |
173 | controller.onListItemSwiped(POSITION, TEST_ITEM);
174 |
175 | //ensure consistency between View and Data Layers
176 | Mockito.verify(dataSource).deleteListItem(TEST_ITEM);
177 | Mockito.verify(view).deleteListItemAt(POSITION);
178 |
179 | //give user the option to undo action
180 | Mockito.verify(view).showUndoSnackbar();
181 |
182 | }
183 |
184 |
185 | /**
186 | * When the User Undoes delete operation, we must do the following:
187 | * - Add the temp item back into the Datasource
188 | * - Animate the item back into the View
189 | */
190 | @Test
191 | public void onUndoDeleteOperation() {
192 | Mockito.when(dataSource.createNewListItem())
193 | .thenReturn(TEST_ITEM);
194 |
195 | //this test requires temporary position and item to be set. We can achieve this by calling
196 | //controller.onListItemSwiped() first.
197 | controller.onListItemSwiped(POSITION, TEST_ITEM);
198 |
199 | controller.onUndoConfirmed();
200 |
201 | Mockito.verify(dataSource).insertListItem(TEST_ITEM);
202 |
203 | Mockito.verify(view).insertListItemAt(
204 | POSITION,
205 | TEST_ITEM
206 | );
207 | }
208 |
209 | /**
210 | * Since the only interaction with Controller is from methods called on it within the Test,
211 | * there isn't really anything to verify against. However, we could use the Debugger to step
212 | * through the Test if necessary.
213 | *
214 | * ¯\_(ツ)_/¯
215 | */
216 | @Test
217 | public void onSnackbarTimeout() {
218 | controller.onListItemSwiped(POSITION, TEST_ITEM);
219 |
220 | controller.onSnackbarTimeout();
221 | }
222 |
223 |
224 | }
--------------------------------------------------------------------------------
/build.gradle:
--------------------------------------------------------------------------------
1 | // Top-level build file where you can add configuration options common to all sub-projects/modules.
2 |
3 | buildscript {
4 | repositories {
5 | jcenter()
6 | }
7 | dependencies {
8 | classpath 'com.android.tools.build:gradle:2.3.3'
9 |
10 | // NOTE: Do not place your application dependencies here; they belong
11 | // in the individual module build.gradle files
12 | }
13 | }
14 |
15 | allprojects {
16 | repositories {
17 | jcenter()
18 | }
19 | }
20 |
21 | task clean(type: Delete) {
22 | delete rootProject.buildDir
23 | }
24 |
--------------------------------------------------------------------------------
/gradle.properties:
--------------------------------------------------------------------------------
1 | # Project-wide Gradle settings.
2 |
3 | # IDE (e.g. Android Studio) users:
4 | # Gradle settings configured through the IDE *will override*
5 | # any settings specified in this file.
6 |
7 | # For more details on how to configure your build environment visit
8 | # http://www.gradle.org/docs/current/userguide/build_environment.html
9 |
10 | # Specifies the JVM arguments used for the daemon process.
11 | # The setting is particularly useful for tweaking memory settings.
12 | org.gradle.jvmargs=-Xmx1536m
13 |
14 | # When configured, Gradle will run in incubating parallel mode.
15 | # This option should only be used with decoupled projects. More details, visit
16 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
17 | # org.gradle.parallel=true
18 |
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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/BracketCove/RecyclerViewTutorial2017/5d2234992993cf92600b2dff4494e010aec0d756/gradle/wrapper/gradle-wrapper.jar
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/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Wed May 31 18:49:52 PDT 2017
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
7 |
--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # Attempt to set APP_HOME
46 | # Resolve links: $0 may be a link
47 | PRG="$0"
48 | # Need this for relative symlinks.
49 | while [ -h "$PRG" ] ; do
50 | ls=`ls -ld "$PRG"`
51 | link=`expr "$ls" : '.*-> \(.*\)$'`
52 | if expr "$link" : '/.*' > /dev/null; then
53 | PRG="$link"
54 | else
55 | PRG=`dirname "$PRG"`"/$link"
56 | fi
57 | done
58 | SAVED="`pwd`"
59 | cd "`dirname \"$PRG\"`/" >/dev/null
60 | APP_HOME="`pwd -P`"
61 | cd "$SAVED" >/dev/null
62 |
63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
64 |
65 | # Determine the Java command to use to start the JVM.
66 | if [ -n "$JAVA_HOME" ] ; then
67 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
68 | # IBM's JDK on AIX uses strange locations for the executables
69 | JAVACMD="$JAVA_HOME/jre/sh/java"
70 | else
71 | JAVACMD="$JAVA_HOME/bin/java"
72 | fi
73 | if [ ! -x "$JAVACMD" ] ; then
74 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
75 |
76 | Please set the JAVA_HOME variable in your environment to match the
77 | location of your Java installation."
78 | fi
79 | else
80 | JAVACMD="java"
81 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
82 |
83 | Please set the JAVA_HOME variable in your environment to match the
84 | location of your Java installation."
85 | fi
86 |
87 | # Increase the maximum file descriptors if we can.
88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
89 | MAX_FD_LIMIT=`ulimit -H -n`
90 | if [ $? -eq 0 ] ; then
91 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
92 | MAX_FD="$MAX_FD_LIMIT"
93 | fi
94 | ulimit -n $MAX_FD
95 | if [ $? -ne 0 ] ; then
96 | warn "Could not set maximum file descriptor limit: $MAX_FD"
97 | fi
98 | else
99 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
100 | fi
101 | fi
102 |
103 | # For Darwin, add options to specify how the application appears in the dock
104 | if $darwin; then
105 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
106 | fi
107 |
108 | # For Cygwin, switch paths to Windows format before running java
109 | if $cygwin ; then
110 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
111 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
112 | JAVACMD=`cygpath --unix "$JAVACMD"`
113 |
114 | # We build the pattern for arguments to be converted via cygpath
115 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
116 | SEP=""
117 | for dir in $ROOTDIRSRAW ; do
118 | ROOTDIRS="$ROOTDIRS$SEP$dir"
119 | SEP="|"
120 | done
121 | OURCYGPATTERN="(^($ROOTDIRS))"
122 | # Add a user-defined pattern to the cygpath arguments
123 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
124 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
125 | fi
126 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
127 | i=0
128 | for arg in "$@" ; do
129 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
130 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
131 |
132 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
133 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
134 | else
135 | eval `echo args$i`="\"$arg\""
136 | fi
137 | i=$((i+1))
138 | done
139 | case $i in
140 | (0) set -- ;;
141 | (1) set -- "$args0" ;;
142 | (2) set -- "$args0" "$args1" ;;
143 | (3) set -- "$args0" "$args1" "$args2" ;;
144 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
145 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
146 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
147 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
148 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
149 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
150 | esac
151 | fi
152 |
153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
154 | function splitJvmOpts() {
155 | JVM_OPTS=("$@")
156 | }
157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
159 |
160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
161 |
--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
1 | include ':app'
2 |
--------------------------------------------------------------------------------
16 |
17 | **Part 3: Advanced RecyclerView Design and Features**
18 |
19 | https://www.youtube.com/watch?v=-xuhicDXMvw
20 |
21 | **Preview:**
22 | 
23 |
24 | Welcome to my Android RecyclerView Tutorial. About a year ago, I got so pissed off at how overly complicated it was to get a decent RecyclerView running (which is also my fault for not being a better learner), that I decided to make series on Youtube about it. Much to my surprise, my long winded explanations and random tangents was something that a few people actually enjoyed.
25 |
26 | While I didn't make any MAJOR mistakes with the old tutorial, I was still pretty much a Junior Developer on the Android Platform at that point. Since then, I've learned a great deal about making Android Apps, and even more about teaching people how to make them; so here you have it.
27 |
28 | Please bare in mind that while I'm getting ok at this Android thing, there's always room to learn. If there's anything in my Code which strikes you as being wrong or sub-optimal, please open a GitHub Issue and let me know about it! Bonus points if you take the time to actually explain why I'm wrong; I don't have a lot of spare time and I appreciate good feedback when I can get it.
29 |
30 | ## For Beginners
31 | The Videos are made for you. I'll do my best to give you the following:
32 | - A fundamental understanding of how RecyclerViews and RecyclerView.Adapters work
33 | - A working App which implements the above
34 | - Good Software Architecture Principles whenever I feel like I can work them in to what I'm talking about
35 | - A brief explanation of Unit Tests (let's not worry about what they ARE, I'll actually show you what they can DO for us)
36 | - General Best Practices for Android App building (well, as far as I'm aware)
37 | - Some of the Layouts use ConstraintLayout
38 | - A West Coast Canadian accent.
39 |
40 | ## For Not Beginners
41 | Read my code. I try to give everything good descriptive names, and I built my Software to basics standards of Software Architecture and SOLID Principles whenever possible.
42 |
43 | ## For All
44 | If nothing else, I hope this project demonstrates that while it's great to learn stuff from Videos and Textbooks, looking at/creating well documented Code with good naming Conventions, is something you should work towards. Whether you are looking at your own old Code, or working with other people, do us all a favour and don't just bang out a bunch of ugly crap with bad names and a Package Structure that doesn't make any sense. The names and Package Structure should help people understand your code, not piss them off.
45 |
46 | ## About Me
47 | I'm an Indie Android Dev living in Victoria BC Canada. I'm a major Nerd, and rambling about Software is quite therapeutic for me, to the extent that I have a [Youtube Channel](https://www.youtube.com/user/gosuddr93) mostly dedicated to that. I also do a Weekly Live Android Developer Q&A Series most Sundays at 9:00AM PDT (GMT -7). You can watch that at the aforementioned time [here](https://www.youtube.com/c/wiseAss/live).
48 |
49 | **Please Read**
50 | I don't release this stuff for free because I don't like money. Actually, I could use all the help I can get to improve my Equipment, Production Quality, Content, and pay my living expenses. If my content is worth even the average fancy Hipster Coffee to you, then please Consider sending me a Fiver once on Patreon.
51 |
52 | ## Social Media
53 |
54 | Facebook: https://www.facebook.com/wiseassblog/
55 |
56 | G+: https://plus.google.com/+wiseass
57 |
58 | Twitter: https://twitter.com/wiseass301
59 |
60 | Patreon: https://www.patreon.com/bePatron?u=5114325
61 |
62 | Blog: http://wiseassblog.com/
63 |
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/Screenshot_20170708-095736_framed.png:
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/Screenshot_20170713-081532_framed.png:
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/app/.gitignore:
--------------------------------------------------------------------------------
1 | /build
2 |
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/app/build.gradle:
--------------------------------------------------------------------------------
1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 25
5 | buildToolsVersion "25.0.2"
6 | defaultConfig {
7 | applicationId "forgettery.wiseass.com.recyclerviewprebuilt"
8 | minSdkVersion 16
9 | targetSdkVersion 25
10 | versionCode 1
11 | versionName "1.0"
12 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
13 | }
14 | buildTypes {
15 | release {
16 | minifyEnabled false
17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
18 | }
19 | }
20 | }
21 |
22 | dependencies {
23 | compile fileTree(dir: 'libs', include: ['*.jar'])
24 | androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
25 | exclude group: 'com.android.support', module: 'support-annotations'
26 | })
27 |
28 | compile 'com.android.support:recyclerview-v7:25.3.1'
29 |
30 | compile 'com.android.support:appcompat-v7:25.3.1'
31 | compile 'com.android.support.constraint:constraint-layout:1.0.2'
32 | compile 'com.android.support:design:25.3.1'
33 |
34 | /*
35 | https://github.com/hdodenhof/CircleImageView
36 | */
37 | compile 'de.hdodenhof:circleimageview:2.1.0'
38 |
39 | testCompile 'org.mockito:mockito-core:2.8.9'
40 | testCompile 'junit:junit:4.12'
41 | }
42 |
--------------------------------------------------------------------------------
/app/proguard-rules.pro:
--------------------------------------------------------------------------------
1 | # Add project specific ProGuard rules here.
2 | # By default, the flags in this file are appended to flags specified
3 | # in C:\Users\R_KAY\AppData\Local\Android\Sdk/tools/proguard/proguard-android.txt
4 | # You can edit the include path and order by changing the proguardFiles
5 | # directive in build.gradle.
6 | #
7 | # For more details, see
8 | # http://developer.android.com/guide/developing/tools/proguard.html
9 |
10 | # Add any project specific keep options here:
11 |
12 | # If your project uses WebView with JS, uncomment the following
13 | # and specify the fully qualified class name to the JavaScript interface
14 | # class:
15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
16 | # public *;
17 | #}
18 |
19 | # Uncomment this to preserve the line number information for
20 | # debugging stack traces.
21 | #-keepattributes SourceFile,LineNumberTable
22 |
23 | # If you keep the line number information, uncomment this to
24 | # hide the original source file name.
25 | #-renamesourcefileattribute SourceFile
26 |
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/app/src/androidTest/java/forgettery/wiseass/com/recyclerviewprebuilt/ExampleInstrumentedTest.java:
--------------------------------------------------------------------------------
1 | /*
2 | * *
3 | * * Copyright (C) 2017 Ryan Kay Open Source Project
4 | * *
5 | * * Licensed under the Apache License, Version 2.0 (the "License");
6 | * * you may not use this file except in compliance with the License.
7 | * * You may obtain a copy of the License at
8 | * *
9 | * * http://www.apache.org/licenses/LICENSE-2.0
10 | * *
11 | * * Unless required by applicable law or agreed to in writing, software
12 | * * distributed under the License is distributed on an "AS IS" BASIS,
13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | * * See the License for the specific language governing permissions and
15 | * * limitations under the License.
16 | *
17 | */
18 |
19 | package forgettery.wiseass.com.recyclerviewprebuilt;
20 |
21 | import android.content.Context;
22 | import android.support.test.InstrumentationRegistry;
23 | import android.support.test.runner.AndroidJUnit4;
24 |
25 | import org.junit.Test;
26 | import org.junit.runner.RunWith;
27 |
28 | import static org.junit.Assert.*;
29 |
30 | /**
31 | * Instrumentation test, which will execute on an Android device.
32 | *
33 | * @see Testing documentation
34 | */
35 | @RunWith(AndroidJUnit4.class)
36 | public class ExampleInstrumentedTest {
37 | @Test
38 | public void useAppContext() throws Exception {
39 | // Context of the app under test.
40 | Context appContext = InstrumentationRegistry.getTargetContext();
41 |
42 | assertEquals("forgettery.wiseass.com.recyclerviewprebuilt", appContext.getPackageName());
43 | }
44 | }
45 |
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/app/src/main/AndroidManifest.xml:
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1 |
2 |
19 |
20 |