├── .gitignore
├── .idea
├── assetWizardSettings.xml
├── caches
│ └── build_file_checksums.ser
├── codeStyles
│ └── Project.xml
├── gradle.xml
├── misc.xml
├── runConfigurations.xml
└── vcs.xml
├── README.md
├── app
├── .gitignore
├── build.gradle
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── example
│ │ └── insodroid1
│ │ └── myapplication
│ │ └── ExampleInstrumentedTest.java
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── com
│ │ │ └── example
│ │ │ └── insodroid1
│ │ │ └── myapplication
│ │ │ ├── Adapter.java
│ │ │ ├── MainActivity.java
│ │ │ └── Model.java
│ └── res
│ │ ├── drawable-v24
│ │ └── ic_launcher_foreground.xml
│ │ ├── drawable
│ │ ├── ic_launcher_background.xml
│ │ ├── svg_arrow_down_filled.xml
│ │ └── svg_arrow_right_filled.xml
│ │ ├── layout
│ │ ├── activity_main.xml
│ │ └── item.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
│ └── com
│ └── example
│ └── insodroid1
│ └── myapplication
│ └── ExampleUnitTest.java
├── build.gradle
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
├── screen_shot.png
└── settings.gradle
/.gitignore:
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2 | .gradle
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7 | .DS_Store
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9 | /captures
10 | .externalNativeBuild
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/README.md:
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1 | # NestedExpandableRecyclerView
2 | NestedExpandableRecyclerView
3 |
4 | Android Recyclerview with nested Expandable List.
5 | Only one RecyclerView is used.
6 | notifyItemInserted and removed is used.
7 |
8 | 
9 |
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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 27
5 | defaultConfig {
6 | applicationId "com.example.insodroid1.myapplication"
7 | minSdkVersion 21
8 | targetSdkVersion 27
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-v7:27.1.1'
24 | implementation 'com.android.support.constraint:constraint-layout:1.1.0'
25 | testImplementation 'junit:junit:4.12'
26 | androidTestImplementation 'com.android.support.test:runner:1.0.2'
27 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
28 |
29 | implementation 'com.android.support:recyclerview-v7:27.1.1'
30 | }
31 |
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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/com/example/insodroid1/myapplication/ExampleInstrumentedTest.java:
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1 | package com.example.insodroid1.myapplication;
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() {
21 | // Context of the app under test.
22 | Context appContext = InstrumentationRegistry.getTargetContext();
23 |
24 | assertEquals("com.example.insodroid1.myapplication", appContext.getPackageName());
25 | }
26 | }
27 |
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/app/src/main/AndroidManifest.xml:
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/app/src/main/java/com/example/insodroid1/myapplication/Adapter.java:
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1 | package com.example.insodroid1.myapplication;
2 |
3 | import android.content.Context;
4 | import android.content.res.Resources;
5 | import android.support.annotation.NonNull;
6 | import android.support.v7.widget.RecyclerView;
7 | import android.util.DisplayMetrics;
8 | import android.view.LayoutInflater;
9 | import android.view.View;
10 | import android.view.ViewGroup;
11 | import android.widget.ImageView;
12 | import android.widget.RelativeLayout;
13 | import android.widget.TextView;
14 |
15 | import java.util.ArrayList;
16 |
17 | public class Adapter extends RecyclerView.Adapter {
18 |
19 | private Context context;
20 | private ArrayList modelsAll = new ArrayList<>();
21 |
22 | public Adapter(Context context) {
23 | this.context = context;
24 | }
25 |
26 | @NonNull
27 | @Override
28 | public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
29 | return new ViewHolder(LayoutInflater.from(context).inflate(R.layout.item, parent, false));
30 | }
31 |
32 | @Override
33 | public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
34 |
35 | final Model model = modelsAll.get(position);
36 | holder.textView.setText(model.name);
37 | holder.tvDesignation.setText(model.designation);
38 |
39 | holder.itemView.setTag(R.string.MODEL, model);
40 | holder.itemView.setTag(R.string.position, position);
41 |
42 | RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) holder.rlContent.getLayoutParams();
43 | layoutParams.setMargins(((int) convertDpToPixel(20, context)) * model.level, layoutParams.topMargin, layoutParams.rightMargin, layoutParams.bottomMargin);
44 |
45 | switch (model.state) {
46 |
47 | case CLOSED:
48 | holder.imgArrow.setImageResource(R.drawable.svg_arrow_right_filled);
49 | break;
50 | case OPENED:
51 | holder.imgArrow.setImageResource(R.drawable.svg_arrow_down_filled);
52 | break;
53 | }
54 |
55 | if (model.models.isEmpty()) {
56 | holder.imgArrow.setVisibility(View.INVISIBLE);
57 | holder.viewDashed.setVisibility(View.VISIBLE);
58 | } else {
59 | holder.imgArrow.setVisibility(View.VISIBLE);
60 | holder.viewDashed.setVisibility(View.INVISIBLE);
61 | }
62 |
63 | holder.itemView.setOnClickListener(new View.OnClickListener() {
64 | @Override
65 | public void onClick(View v) {
66 |
67 | int position = (int) v.getTag(R.string.position);
68 | Model rootModel = (Model) v.getTag(R.string.MODEL);
69 | if (rootModel.models.isEmpty()) {
70 | return;
71 | }
72 | switch (rootModel.state) {
73 |
74 | case CLOSED:
75 | modelsAll.addAll(position + 1, rootModel.models);
76 | notifyItemRangeInserted(position + 1, rootModel.models.size());
77 | notifyItemRangeChanged(position + rootModel.models.size(), modelsAll.size() - (position + rootModel.models.size()));
78 | notifyItemRangeChanged(position, modelsAll.size() - position);
79 | rootModel.state = Model.STATE.OPENED;
80 | break;
81 |
82 | case OPENED:
83 |
84 | int start = position + 1;
85 | int end = modelsAll.size();
86 | for (int i = start; i < modelsAll.size(); i++) {
87 | Model model1 = modelsAll.get(i);
88 | if (model1.level <= rootModel.level) {
89 | end = i;
90 | break;
91 | } else {
92 | if (model1.state == Model.STATE.OPENED) {
93 | model1.state = Model.STATE.CLOSED;
94 | }
95 | }
96 | }
97 |
98 | if (end != -1) {
99 | modelsAll.subList(start, end).clear();
100 | notifyItemRangeRemoved(start, end - start);
101 | notifyItemRangeChanged(start, end - start);
102 | notifyItemRangeChanged(position, modelsAll.size() - position);
103 | }
104 |
105 | rootModel.state = Model.STATE.CLOSED;
106 | break;
107 | }
108 |
109 |
110 | }
111 | });
112 | }
113 |
114 | @Override
115 | public int getItemCount() {
116 | return modelsAll.size();
117 | }
118 |
119 | public void setData(ArrayList list) {
120 | modelsAll = list;
121 | notifyDataSetChanged();
122 | }
123 |
124 | class ViewHolder extends RecyclerView.ViewHolder {
125 |
126 | RelativeLayout rlContent;
127 | TextView textView;
128 | TextView tvDesignation;
129 | ImageView imgArrow;
130 | View viewDashed;
131 |
132 | public ViewHolder(View itemView) {
133 |
134 | super(itemView);
135 | textView = (TextView) itemView.findViewById(R.id.tvName);
136 | imgArrow = (ImageView) itemView.findViewById(R.id.imgArrow);
137 | rlContent = (RelativeLayout) itemView.findViewById(R.id.rlContent);
138 | viewDashed = itemView.findViewById(R.id.viewDashed);
139 | tvDesignation = (TextView) itemView.findViewById(R.id.tvDesignation);
140 | }
141 | }
142 |
143 |
144 | public static float convertDpToPixel(float dp, Context context) {
145 | Resources resources = context.getResources();
146 | DisplayMetrics metrics = resources.getDisplayMetrics();
147 | float px = dp * ((float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
148 | return px;
149 | }
150 |
151 | /**
152 | * This method converts device specific pixels to density independent pixels.
153 | *
154 | * @param px A value in px (pixels) unit. Which we need to convert into db
155 | * @param context Context to get resources and device specific display metrics
156 | * @return A float value to represent dp equivalent to px value
157 | */
158 | public static float convertPixelsToDp(float px, Context context) {
159 | Resources resources = context.getResources();
160 | DisplayMetrics metrics = resources.getDisplayMetrics();
161 | float dp = px / ((float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
162 | return dp;
163 | }
164 | }
165 |
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/app/src/main/java/com/example/insodroid1/myapplication/MainActivity.java:
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1 | package com.example.insodroid1.myapplication;
2 |
3 | import android.support.v7.app.AppCompatActivity;
4 | import android.os.Bundle;
5 | import android.support.v7.widget.LinearLayoutManager;
6 | import android.support.v7.widget.RecyclerView;
7 |
8 | import java.util.ArrayList;
9 |
10 | public class MainActivity extends AppCompatActivity {
11 |
12 | RecyclerView rvList;
13 | Adapter adapter;
14 |
15 | @Override
16 | protected void onCreate(Bundle savedInstanceState) {
17 |
18 | super.onCreate(savedInstanceState);
19 | setContentView(R.layout.activity_main);
20 | rvList = findViewById(R.id.list);
21 | adapter = new Adapter(this);
22 | rvList.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
23 | rvList.setAdapter(adapter);
24 | adapter.setData(getList());
25 | }
26 |
27 |
28 | public ArrayList getList() {
29 |
30 | ArrayList models = new ArrayList<>();
31 |
32 | Model model1_1 = new Model("Carmelita Badura", 1 , "Chief Executive Officer");
33 | Model model1_1_1 = new Model("Elisha Pickert", 2,"Accounts Manager");
34 | Model model1_1_2 = new Model("Patricia Netherton", 2,"Recruitment Manager");
35 | Model model1_1_3 = new Model("Christeen Petrey", 2,"Technology Manager ");
36 | Model model1_1_4 = new Model("Lolita Moreman", 2,"Store Manager");
37 | model1_1.models.add(model1_1_1);
38 | model1_1.models.add(model1_1_2);
39 | model1_1.models.add(model1_1_3);
40 | model1_1.models.add(model1_1_4);
41 |
42 | Model model1_2 = new Model("Manuela Kass", 1,"Chief Operating Officer");
43 | Model model1_2_1 = new Model("Roseanna Branham", 2,"Regional Managers");
44 |
45 | Model model1_2_1_1 = new Model("Dennise Lasso", 3,"Functional Managers");
46 | Model model1_2_1_2 = new Model("Sabrina Shively", 3,"Departmental Manager");
47 | Model model1_2_1_3 = new Model("Jin Haecker", 3,"Compensation and Benefits Manager");
48 | Model model1_2_1_4 = new Model("Season Parrett ", 3,"General Manager");
49 | model1_2_1.models.add(model1_2_1_1);
50 | model1_2_1.models.add(model1_2_1_2);
51 | model1_2_1.models.add(model1_2_1_3);
52 | model1_2_1.models.add(model1_2_1_4);
53 |
54 | Model model1_2_2 = new Model("Vicky Parkhurst", 2,"IT Manager");
55 | Model model1_2_3 = new Model("Taisha Dragoo", 2,"Food Service Manager");
56 | Model model1_2_4 = new Model("Abbey Ballance", 2,"Medical Services Manager");
57 | model1_2.models.add(model1_2_1);
58 | // model1_2.models.add(model1_2_2);
59 | // model1_2.models.add(model1_2_3);
60 | // model1_2.models.add(model1_2_4);
61 |
62 | // model1_2.models.add(model1_2_1);
63 | // model1_2.models.add(model1_2_2);
64 | // model1_1.models.add(model1_2_3);
65 | // model1_1.models.add(model1_2_4);
66 |
67 |
68 | Model model1_3 = new Model("Arlinda Fogal", 1,"Chief Financial Officer");
69 |
70 | Model model1_4 = new Model("Stephen Cabe", 1,"Chief Technology Officer");
71 | Model model1_4_1 = new Model("Cherilyn Lehn", 2,"Advertising Manager");
72 | Model model1_4_2 = new Model("Lashay Baumer", 2,"Affiliate Management Associate");
73 | Model model1_4_3 = new Model("Abbie Kilmer", 2,"Branch Manager");
74 | Model model1_4_4 = new Model("Clinton Boyers", 2,"Budget Manager");
75 | model1_4.models.add(model1_4_1);
76 | model1_4.models.add(model1_4_2);
77 | model1_4.models.add(model1_4_3);
78 | model1_4.models.add(model1_4_4);
79 |
80 | models.add(model1_1);
81 | models.add(model1_2);
82 | models.add(model1_3);
83 | models.add(model1_4);
84 |
85 |
86 | return models;
87 | }
88 |
89 | }
90 |
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/app/src/main/java/com/example/insodroid1/myapplication/Model.java:
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1 | package com.example.insodroid1.myapplication;
2 |
3 | import java.util.ArrayList;
4 |
5 | public class Model {
6 |
7 | public enum STATE {
8 | CLOSED,
9 | OPENED
10 | }
11 |
12 | String name;
13 | int level;
14 | STATE state = STATE.CLOSED;
15 | String designation;
16 | ArrayList models = new ArrayList<>();
17 |
18 | public Model(String name, int level , String designation) {
19 | this.name = name;
20 | this.level = level;
21 | this.designation = designation;
22 | }
23 |
24 | }
25 |
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/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
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