Lab1, first pull request.

README.md

@@ -1 +1,38 @@
-# AndroidOracle
+# AndroidOracle
+
+## Preview
+1. This project uses jdk 8;
+2. Navigation is built on fragments;
+
+## Features
+☑️Main screen with buttons:
+- Ask a question,
+- Settings,
+- Quit;
+
+<br>☑️Settings screen that allows you to edit user information:
+- name (text field),
+- last name (text field),
+- date of birth (display in text, change the date using DatePickerDialog),
+- gender (RadioButton);
+
+<br>☑️Screen for questions:
+- the user enters a question and clicks the "Generate" button,
+- the program responds with one of the following options: "Yes", "No", "Of course", "Maybe", "Are you sure?", "Great", "Wonderful", "Right?", "Maybe we should not?", "Please, repeat", "No more words, silence", "Are you sleeping now?", "Don't know", "Who cares"
+- the answer is generated based on the following data: entered question, information about user, current date.
+- for the same input data, the answer must be the same.
+
+## Launch guide
+To run this project you will need to install this project in phone with Android Operating System.
+
+## Program testing
+### Main Menu
+![Main Menu](app/src/main/res/img/main.jpg)
+![Main Menu](app/src/main/res/img/main_land.jpg)
+### Settings
+![Settings](app/src/main/res/img/setting.jpg)
+![Settings](app/src/main/res/img/setting_land.jpg)
+### Ask a question
+![Ask a question](app/src/main/res/img/ask_a_question.jpg)
+![Ask a question](app/src/main/res/img/ask_a_question_done.jpg)
+![Ask a question](app/src/main/res/img/ask_a_question_done_land.jpg)

app/build.gradle

@@ -7,7 +7,7 @@ android {
     buildToolsVersion "30.0.2"
 
     defaultConfig {
-        applicationId "ua.gura.com.example.andriodoracle"
+        applicationId "ua.gura.com.example.androidoracle"
         minSdkVersion 19
         targetSdkVersion 30
         versionCode 1
@@ -30,10 +30,10 @@ android {
 
 dependencies {
 
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'com.google.android.material:material:1.6.1'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.2'
     testImplementation 'junit:junit:4.+'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 }

app/src/androidTest/java/ua/gura/com/example/andriodoracle/ExampleInstrumentedTest.java → app/src/androidTest/java/ua/gura/com/example/androidoracle/ExampleInstrumentedTest.java

@@ -1,4 +1,4 @@
-package ua.gura.com.example.andriodoracle;
+package ua.gura.com.example.androidoracle;
 
 import android.content.Context;
 
@@ -21,6 +21,6 @@ public class ExampleInstrumentedTest {
     public void useAppContext() {
         // Context of the app under test.
         Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-        assertEquals("ua.gura.com.example.andriodoracle", appContext.getPackageName());
+        assertEquals("ua.gura.com.example.androidoracle", appContext.getPackageName());
     }
 }

app/src/main/AndroidManifest.xml

@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="ua.gura.com.example.andriodoracle">
+    package="ua.gura.com.example.androidoracle">
 
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.AndriodOracle">
+        android:theme="@style/Theme.AndroidOracle">
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/ua/gura/com/example/androidoracle/MainActivity.java

@@ -0,0 +1,153 @@
+package ua.gura.com.example.androidoracle;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+
+import android.os.Bundle;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import ua.gura.com.example.androidoracle.contract.AppContract;
+import ua.gura.com.example.androidoracle.contract.ResponseListener;
+import ua.gura.com.example.androidoracle.fragments.MenuFragment;
+import ua.gura.com.example.androidoracle.fragments.QuestionFragment;
+import ua.gura.com.example.androidoracle.fragments.SettingFragment;
+import ua.gura.com.example.androidoracle.model.User;
+
+public class MainActivity extends AppCompatActivity
+        implements AppContract {
+    public static final String TAG =
+            MainActivity.class.getSimpleName();
+    private Map<String, List<ListenerInfo<?>>> listeners =
+            new HashMap<>();
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState){
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        if (savedInstanceState == null) {
+            launchFragment(null, new MenuFragment());
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        cancel();
+    }
+
+    @Override
+    public void toSettingScreen(Fragment target,
+                                User user) {
+        launchFragment(target,
+                SettingFragment.newInstance(user));
+    }
+
+    @Override
+    public void toResultsScreen(Fragment target,
+                                User user) {
+        launchFragment(target, QuestionFragment.newInstance(user));
+    }
+
+    @Override
+    public void cancel() {
+        int count = getSupportFragmentManager()
+                .getBackStackEntryCount();
+        if (count <= 1) {
+            finish();
+        } else {
+            getSupportFragmentManager().popBackStack();
+        }
+    }
+
+    @Override
+    public <T> void publish(T results) {
+        Fragment currentFragment = getCurrentFragment();
+        if (currentFragment == null) {
+            Log.e(TAG, "Can't find the current fragment");
+            return;
+        }
+        Fragment targetFragment =
+                currentFragment.getTargetFragment();
+        if (targetFragment == null) {
+            Log.e(TAG, "Fragment " + currentFragment +
+                    " doesn't have a target");
+            return;
+        }
+        String tag = targetFragment.getTag();
+        if (tag == null) {
+            Log.e(TAG, "Target fragment exists but doesn't have a tag: " + targetFragment);
+            return;
+        }
+        List<ListenerInfo<?>> listeners =
+                this.listeners.get(tag);
+        if (listeners != null) {
+            Iterator<ListenerInfo<?>> it = listeners.iterator();
+            while (it.hasNext() &&
+                    !it.next().tryPublish(results));
+        }
+    }
+    @Override
+    public <T> void registerListener(Fragment fragment,
+                                     Class<T> clazz,
+                                     ResponseListener<T> listener) {
+        if (fragment.getTag() == null) {
+            Log.e(TAG, "Fragment '" + fragment +
+                    "' doesn't have a tag");
+            return;
+        }
+        List<ListenerInfo<?>> listeners =
+                this.listeners.get(fragment.getTag());
+        if (listeners == null) {
+            listeners = new ArrayList<>();
+            this.listeners.put(fragment.getTag(), listeners);
+        }
+        listeners.add(new ListenerInfo<>(clazz, listener));
+    }
+    @Override
+    public void unregisterListeners(Fragment fragment) {
+        if (fragment.getTag() == null) {
+            Log.e(TAG, "Fragment '" + fragment +
+                    "' doesn't have a tag");
+            return;
+        }
+        this.listeners.remove(fragment.getTag());
+    }
+    private void launchFragment(@Nullable Fragment target,
+                                Fragment fragment) {
+        if (target != null) {
+            fragment.setTargetFragment(target, 0);
+        }
+        String tag = UUID.randomUUID().toString();
+        getSupportFragmentManager().beginTransaction()
+                .addToBackStack(null)
+                .replace(R.id.fragmentContainer, fragment, tag)
+                .commit();
+    }
+    private Fragment getCurrentFragment() {
+        return getSupportFragmentManager()
+                .findFragmentById(R.id.fragmentContainer);
+    }
+    private static class ListenerInfo<T> {
+        Class<T> clazz;
+        ResponseListener<T> listener;
+        private ListenerInfo(Class<T> clazz,
+                             ResponseListener<T> listener) {
+            this.clazz = clazz;
+            this.listener = listener;
+        }
+        boolean tryPublish(Object result) {
+            if (result.getClass().equals(clazz)) {
+                listener.onResults((T) result);
+                return true;
+            }
+            return false;
+        }
+    }
+}

app/src/main/java/ua/gura/com/example/androidoracle/contract/AppContract.java

@@ -0,0 +1,40 @@
+package ua.gura.com.example.androidoracle.contract;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import ua.gura.com.example.androidoracle.model.User;
+
+public interface AppContract {
+    /**
+     * Launch options screen
+     * @param target fragment that launches options screen
+     * @param user data about the User to be displayed
+     */
+    void toSettingScreen(Fragment target,
+                         @Nullable User user);
+    /**
+     * Launch results screen
+     * @param target fragment that launches results screen
+     * @param user data used for calculating variant
+     */
+    void toResultsScreen(Fragment target, User user);
+    /**
+     * Exit from the current screen
+     */
+    void cancel();
+    /**
+     * Publish results to the target screen
+     */
+    <T> void publish(T data);
+    /**
+     * Listen for results from other screens
+     */
+    <T> void registerListener(Fragment fragment, Class<T> clazz,
+                              ResponseListener<T> listener);
+    /**
+     * Stop listening for results from other screens
+     */
+    void unregisterListeners(Fragment fragment);
+
+}

app/src/main/java/ua/gura/com/example/androidoracle/contract/ResponseListener.java

@@ -0,0 +1,5 @@
+package ua.gura.com.example.androidoracle.contract;
+
+public interface ResponseListener<T> {
+    void onResults(T results);
+}

app/src/main/java/ua/gura/com/example/androidoracle/fragments/BaseFragment.java

@@ -0,0 +1,32 @@
+package ua.gura.com.example.androidoracle.fragments;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+
+import ua.gura.com.example.androidoracle.contract.AppContract;
+import ua.gura.com.example.androidoracle.contract.ResponseListener;
+
+public class BaseFragment extends Fragment {
+
+    private AppContract appContract;
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        this.appContract = (AppContract) context;
+    }
+    @Override
+    public void onDetach() {
+        super.onDetach();
+        this.appContract.unregisterListeners(this);
+        this.appContract = null;
+    }
+    final AppContract getAppContract() {
+        return appContract;
+    }
+    final <T> void registerListener(Class<T> clazz,
+                                    ResponseListener<T> listener) {
+        getAppContract().registerListener(this, clazz, listener);
+    }
+}