Students | Vadim Dyachkov

.gitignore

@@ -11,3 +11,4 @@
 /build
 /captures
 .externalNativeBuild
+.idea

app/build.gradle

@@ -22,6 +22,8 @@ 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 'de.hdodenhof:circleimageview:2.2.0'
     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/AndroidManifest.xml

@@ -9,7 +9,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".StudentsApp">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

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

@@ -0,0 +1,147 @@
+package ru.ok.technopolis.students;
+
+import android.content.Context;
+import android.support.constraint.ConstraintLayout;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.util.Random;
+
+public class StudentView extends ConstraintLayout {
+
+    private static final Random rand = new Random();
+    private static final int[] malePhotos = {R.drawable.male_1, R.drawable.male_2, R.drawable.male_3};
+    private static final int[] femalePhotos = {R.drawable.female_1, R.drawable.female_2, R.drawable.female_3};
+
+    private Student student;
+
+    private TextView firstNameTv;
+    private TextView secondNameTv;
+    private ImageView photoIv;
+    private CheckBox isMaleCb;
+
+    private OnClickListener onSave;
+    private OnClickListener onCreate;
+    private OnClickListener onRemove;
+    private OnClickListener onHide;
+
+    public StudentView(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public StudentView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public StudentView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context);
+    }
+
+    private void init(Context context) {
+        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View view = inflater.inflate(R.layout.student_view, this, false);
+        addView(view);
+
+        photoIv = view.findViewById(R.id.student_view__photo);
+        firstNameTv = view.findViewById(R.id.student_view__first_name);
+        secondNameTv = view.findViewById(R.id.student_view__second_name);
+        isMaleCb = view.findViewById(R.id.student_view__is_male);
+
+        Button saveBtn = view.findViewById(R.id.student_view__save);
+        saveBtn.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (student != null) {
+                    student.setFirstName(firstNameTv.getText().toString());
+                    student.setSecondName(secondNameTv.getText().toString());
+                    student.setMaleGender(isMaleCb.isChecked());
+                    StudentView.this.onSave.onClick(v);
+                } else {
+                    String firstName = firstNameTv.getText().toString();
+                    String secondName = secondNameTv.getText().toString();
+                    if (firstName.isEmpty() || secondName.isEmpty()) {
+                        String text = getContext().getString(R.string.error_insert_first_name_and_second_name);
+                        Toast.makeText(getContext(), text, Toast.LENGTH_LONG).show();
+                        return;
+                    }
+                    boolean isMale = isMaleCb.isChecked();
+                    int photo = randomPhoto(isMale);
+                    photoIv.setImageResource(photo);
+                    student = new Student(firstName, secondName, isMale, photo);
+                    v.setTag(student);
+                    onCreate.onClick(v);
+                }
+            }
+        });
+        Button hideBtn = view.findViewById(R.id.student_view__hide);
+        hideBtn.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                onHide.onClick(v);
+                StudentView.this.setVisibility(GONE);
+            }
+        });
+        Button removeBtn = view.findViewById(R.id.student_view__remove);
+        removeBtn.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (student != null) {
+                    onRemove.onClick(v);
+                    StudentView.this.setVisibility(GONE);
+                    clearFields();
+                }
+            }
+        });
+    }
+
+    public void setOnRemove(OnClickListener onRemove) {
+        this.onRemove = onRemove;
+    }
+
+    public void setOnSave(OnClickListener onSave) {
+        this.onSave = onSave;
+    }
+
+    public void setOnCreate(OnClickListener onCreate) {
+        this.onCreate = onCreate;
+    }
+
+    public void setOnHide(OnClickListener onHide) {
+        this.onHide = onHide;
+    }
+
+    public void setStudent(Student student) {
+        this.student = student;
+        if (student != null) {
+            photoIv.setImageResource(student.getPhoto());
+            firstNameTv.setText(student.getFirstName());
+            secondNameTv.setText(student.getSecondName());
+            isMaleCb.setChecked(student.isMaleGender());
+        } else {
+            clearFields();
+        }
+        setVisibility(VISIBLE);
+    }
+
+    private void clearFields() {
+        photoIv.setImageResource(R.color.colorWhite);
+        firstNameTv.setText("");
+        secondNameTv.setText("");
+        isMaleCb.setChecked(false);
+    }
+
+    private static int randomPhoto(boolean isMale) {
+        return isMale
+                ? malePhotos[rand.nextInt(malePhotos.length)]
+                : femalePhotos[rand.nextInt(femalePhotos.length)];
+    }
+}

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

@@ -0,0 +1,75 @@
+package ru.ok.technopolis.students;
+
+import android.annotation.SuppressLint;
+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;
+
+public class StudentsAdapter extends RecyclerView.Adapter<StudentsAdapter.StudentViewHolder> {
+
+    private final StudentsRepository repository;
+    private final View.OnClickListener onClick;
+
+    public StudentsAdapter(StudentsRepository repository, View.OnClickListener onClick) {
+        this.repository = repository;
+        this.onClick = onClick;
+    }
+
+    @NonNull
+    @Override
+    public StudentViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
+        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.student_list_item, viewGroup, false);
+        return new StudentViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull StudentViewHolder viewHolder, int i) {
+        viewHolder.bind(repository.get(i));
+        viewHolder.itemView.setTag(i);
+
+        Integer active = repository.getActive();
+        if (active != null && active.equals(i)) {
+            viewHolder.itemView.setBackgroundResource(R.color.colorLightGray);
+        } else {
+            viewHolder.itemView.setBackgroundResource(R.color.colorWhite);
+        }
+
+        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                int position = (int) v.getTag();
+                repository.setActive(position);
+                onClick.onClick(v);
+                notifyDataSetChanged();
+            }
+        });
+    }
+
+    @Override
+    public int getItemCount() {
+        return repository.size();
+    }
+
+    static final class StudentViewHolder extends RecyclerView.ViewHolder {
+
+        private final ImageView photo;
+        private final TextView name;
+
+        StudentViewHolder(@NonNull View itemView) {
+            super(itemView);
+            photo = itemView.findViewById(R.id.students_list_item_photo);
+            name = itemView.findViewById(R.id.students_list_item_name);
+        }
+
+        @SuppressLint("SetTextI18n")
+        private void bind(@NonNull Student student) {
+            photo.setImageResource(student.getPhoto());
+            name.setText(student.getFirstName() + " " + student.getSecondName());
+        }
+    }
+
+}