Shakhov

app/build.gradle

@@ -22,6 +22,9 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    implementation 'com.android.support:recyclerview-v7:28.0.0'
+    implementation 'com.android.support:cardview-v7:28.0.0'
+
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

app/src/main/java/ru/ok/technopolis/students/MainActivity.java

@@ -1,14 +1,182 @@
 package ru.ok.technopolis.students;
 
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.Spinner;
+import android.widget.Toast;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
 
 public class MainActivity extends AppCompatActivity {
 
+    private final List<Student> students = new ArrayList<>();
+    private Student currentStudent;
+    private EditText firstNameView;
+    private String firstName;
+    private EditText secondNameView;
+    private String secondName;
+    private Spinner genderView;
+    private ArrayAdapter genderAdapter;
+    private String gender;
+    private ImageView photoView;
+    private int photoResId = 0;
+    private StudentAdapter studentAdapter;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        // Test data
+        students.add(new Student("Lyla", "Foy", "Андрогин", R.drawable.female_1));
+        students.add(new Student("Evgeny", "Sobko", "Бигендер", R.drawable.male_2));
+        students.add(new Student("Habib", "Nurmagomedov", "Дрэг", R.drawable.male_1));
+
+        firstNameView = findViewById(R.id.activity_main_student_first_name);
+        secondNameView = findViewById(R.id.activity_main_student_second_name);
+        genderView = findViewById(R.id.activity_main_student_gender);
+        genderAdapter = (ArrayAdapter) genderView.getAdapter();
+        photoView = findViewById(R.id.activity_main_student_photo);
+
+        findViewById(R.id.activity_main_button_remove).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (currentStudent != null) {
+                    students.remove(currentStudent);
+                    studentAdapter.notifyDataSetChanged();
+                }
+                setCurrentStudent(null);
+            }
+        });
+
+        findViewById(R.id.activity_main_button_save).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (currentStudent == null) {
+                    saveNewStudent();
+                } else {
+                    saveStudent();
+                }
+            }
+        });
+
+        findViewById(R.id.activity_main_button_add).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                addStudent();
+            }
+        });
+
+        RecyclerView recyclerView = findViewById(R.id.recycler_view);
+        studentAdapter = new StudentAdapter(students, new StudentAdapter.Listener() {
+            @Override
+            public void onStudentClick(Student student) {
+                setCurrentStudent(student);
+            }
+        });
+        recyclerView.setAdapter(studentAdapter);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+    }
+
+    private void getInputData() {
+        firstName = firstNameView.getText().toString().trim();
+        secondName = secondNameView.getText().toString().trim();
+        gender = (String) genderView.getSelectedItem();
     }
 
+    private void setInputData() {
+        firstNameView.setText(firstName);
+        secondNameView.setText(secondName);
+        genderView.setSelection(genderAdapter.getPosition(gender));
+        photoView.setImageResource(photoResId);
+    }
+
+    private boolean isStudentProfileValid() {
+        if (firstName.isEmpty() || secondName.isEmpty()) return false;
+        return true;
+    }
+
+    private void setCurrentStudent(Student student) {
+        if (student == null) {
+            firstNameView.setText("");
+            secondNameView.setText("");
+            genderView.setSelection(0);
+            Random random = new Random();
+            int randomDrawable = 0;
+            switch (random.nextInt(6)) {
+                case 0: {
+                    randomDrawable = R.drawable.female_1;
+                    break;
+                }
+                case 1: {
+                    randomDrawable = R.drawable.female_2;
+                    break;
+                }
+                case 2: {
+                    randomDrawable = R.drawable.female_3;
+                    break;
+                }
+                case 3: {
+                    randomDrawable = R.drawable.male_1;
+                    break;
+                }
+                case 4: {
+                    randomDrawable = R.drawable.male_2;
+                    break;
+                }
+                case 5: {
+                    randomDrawable = R.drawable.male_3;
+                    break;
+                }
+            }
+            photoResId = randomDrawable;
+            photoView.setImageResource(randomDrawable);
+            currentStudent = null;
+        } else {
+            firstName = student.getFirstName();
+            secondName = student.getSecondName();
+            gender = student.getGender();
+            photoResId = student.getPhoto();
+            setInputData();
+            currentStudent = student;
+        }
+    }
+
+    private void addStudent() {
+        setCurrentStudent(null);
+        studentAdapter.setChosenStudent(null);
+    }
+
+    private void saveStudent() {
+        getInputData();
+        if (isStudentProfileValid()) {
+            currentStudent.setFirstName(firstName);
+            currentStudent.setSecondName(secondName);
+            currentStudent.setGender(gender);
+            currentStudent.setPhoto(photoResId);
+            studentAdapter.notifyDataSetChanged();
+        } else {
+            Toast.makeText(this, R.string.invalid_profile_toast, Toast.LENGTH_LONG).show();
+        }
+    }
+
+    private void saveNewStudent() {
+        getInputData();
+        if (isStudentProfileValid()) {
+            currentStudent = new Student(firstName, secondName, gender, photoResId);
+            students.add(currentStudent);
+            studentAdapter.setChosenStudent(currentStudent);
+            studentAdapter.notifyDataSetChanged();
+        } else {
+            Toast.makeText(this, R.string.invalid_profile_toast, Toast.LENGTH_LONG).show();
+        }
+    }
 }

app/src/main/java/ru/ok/technopolis/students/Student.java

@@ -4,13 +4,13 @@ public class Student {
 
     private String firstName;
     private String secondName;
-    private boolean maleGender;
+    private String gender;
     private int photo;
 
-    public Student(String firstName, String secondName, boolean maleGender, int photo) {
+    public Student(String firstName, String secondName, String gender, int photo) {
         this.firstName = firstName;
         this.secondName = secondName;
-        this.maleGender = maleGender;
+        this.gender = gender;
         this.photo = photo;
     }
 
@@ -30,12 +30,12 @@ public void setSecondName(String secondName) {
         this.secondName = secondName;
     }
 
-    public boolean isMaleGender() {
-        return maleGender;
+    public String getGender() {
+        return gender;
     }
 
-    public void setMaleGender(boolean maleGender) {
-        this.maleGender = maleGender;
+    public void setGender(String gender) {
+        this.gender = gender;
     }
 
     public int getPhoto() {

app/src/main/java/ru/ok/technopolis/students/StudentAdapter.java

@@ -0,0 +1,88 @@
+package ru.ok.technopolis.students;
+
+import android.support.annotation.NonNull;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.util.List;
+
+public class StudentAdapter extends RecyclerView.Adapter<StudentAdapter.StudentViewHolder> {
+
+    private final List<Student> students;
+    private final Listener onStudentClickListener;
+    private Student chosenStudent;
+    private View chosenStudentView;
+
+    public StudentAdapter(List<Student> students, Listener onStudentClickListener) {
+        this.students = students;
+        this.onStudentClickListener = onStudentClickListener;
+    }
+
+    @NonNull
+    @Override
+    public StudentViewHolder onCreateViewHolder(@NonNull final ViewGroup viewGroup, int i) {
+        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
+        view.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (chosenStudentView != null) chosenStudentView.setSelected(false);
+                chosenStudent = (Student) v.getTag();
+                onStudentClickListener.onStudentClick(chosenStudent);
+                chosenStudentView = v;
+                chosenStudentView.setSelected(true);
+            }
+        });
+        return new StudentViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull StudentViewHolder studentViewHolder, int i) {
+        Student student = students.get(i);
+        studentViewHolder.bind(student);
+        View studentView = studentViewHolder.itemView;
+        studentView.setTag(student);
+        if (student == chosenStudent) {
+            studentView.setSelected(true);
+            chosenStudentView = studentView;
+        } else {
+            studentView.setSelected(false);
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return students.size();
+    }
+
+    public void setChosenStudent(Student student) {
+        chosenStudent = student;
+        if (chosenStudentView != null) {
+            chosenStudentView.setSelected(false);
+            chosenStudentView = null;
+        }
+    }
+
+    static final class StudentViewHolder extends RecyclerView.ViewHolder {
+        private final ImageView photoImageView;
+        private final TextView nameTextView;
+
+        public StudentViewHolder(@NonNull View itemView) {
+            super(itemView);
+            photoImageView = itemView.findViewById(R.id.list_item_photo);
+            nameTextView = itemView.findViewById(R.id.list_item_name);
+        }
+
+        private void bind(@NonNull Student student) {
+            photoImageView.setImageResource(student.getPhoto());
+            nameTextView.setText(student.getFirstName() + " " + student.getSecondName());
+        }
+    }
+
+    interface Listener {
+        void onStudentClick(Student student);
+    }
+}

app/src/main/res/drawable/divider.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <size android:height="1dp" />
+    <solid android:color="#979797" />
+
+</shape>

app/src/main/res/drawable/list_item_border.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:state_selected="true">
+        <shape xmlns:android="http://schemas.android.com/apk/res/android"
+            android:shape="rectangle" >
+            <stroke
+                android:width="2dp"
+                android:color="#979797" />
+        </shape>
+    </item>
+
+</selector>