استخدام قاعدة بيانات Snappy الرئيسية في Android

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/filmNameTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25sp"
        android:layout_centerInParent="true"
        android:layout_margin="8dp"
        />

    <TextView
        android:id="@+id/filmBudgetTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textSize="25sp"
        android:layout_below="@+id/filmNameTextView"
        android:layout_margin="8dp"
        />

    <TextView
        android:id="@+id/genreTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textSize="25sp"
        android:layout_below="@id/filmBudgetTextView"
        android:layout_margin="8dp"
        />

    <TextView
        android:id="@+id/isAdult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/genreTextView"
        android:textSize="25sp"
        android:layout_centerInParent="true"
        />
</RelativeLayout>

private void putValues(String name, int budget, boolean isAdult, String[] genres) throws SnappydbException {
        DB snappyDB = DBFactory.open(this,"Film");
        //     Film (      open)

        snappyDB.put("Name", name);
        snappyDB.putInt("budget", budget);
        snappyDB.putBoolean("isAdult", isAdult);
        snappyDB.put("genres", genres);
        //       
}

private void setValues(DB snappyDB) throws SnappydbException {
        TextView filmNameTextView = findViewById(R.id.filmNameTextView),
                 filmBudgetTextView = findViewById(R.id.filmBudgetTextView),
                 genresTextView = findViewById(R.id.genreTextView),
                 isAdultTextView = findViewById(R.id.isAdult); //    

        String name = snappyDB.get("Name");
        int budget = snappyDB.getInt("budget");
        boolean isAdult = snappyDB.getBoolean("isAdult");
        String[] genres = snappyDB.getObjectArray("genres", String.class);//2  =  
        //  get...     

        filmNameTextView.setText(name);
        filmBudgetTextView.setText(String.valueOf(budget));
        isAdultTextView.setText(String.valueOf(isAdult));

        for(int i = 0;i < genres.length;i++) {
            genresTextView.setText(genresTextView.getText() + " " + genres[i]);
        }
}

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        try {
            putValues("Forrest Gump", 677000000,false, new String[] {"Drama","Melodrama"});
        } catch (SnappydbException e) {
            e.printStackTrace();
        }
        
        try {
            DB snappyDB = DBFactory.open(this, "Film");
            setValues(snappyDB);
        } catch (SnappydbException e) {
            e.printStackTrace();
        }
}

public class Film {
    private String name;
    private int budget;
    private String[] genres;

    public Film() {}

    public Film(String name, int budget, String[] genres) {
        this.name = name;
        this.budget = budget;
        this.genres = genres;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getBudget() {
        return budget;
    }

    public void setBudget(int budget) {
        this.budget = budget;
    }

    public String[] getGenres() {
        return genres;
    }

    public void setGenres(String[] genres) {
        this.genres = genres;
    }
}

Film film = new Film("Shawshank redemption",28000000, new String[] {"Drama"});
try {
       DB snappyDB = DBFactory.open(this, "NewFilmDB");
       snappyDB.put("FilmObj",film);
} catch (SnappydbException e) {
       e.printStackTrace();
}

private void setValues(DB snappyDB) throws SnappydbException {
        TextView filmNameTextView = findViewById(R.id.filmNameTextView),
                 filmBudgetTextView = findViewById(R.id.filmBudgetTextView),
                 genresTextView = findViewById(R.id.genreTextView);

        Film film = snappyDB.getObject("FilmObj", Film.class);
        
        String name = film.getName();
        int budget = film.getBudget();
        String[] genres = film.getGenres();

        filmNameTextView.setText(name);
        filmBudgetTextView.setText(String.valueOf(budget));

        for(int i = 0;i < genres.length;i++) {
            genresTextView.setText(genresTextView.getText() + " " + genres[i]);
        }
}

try {
        DB snappyDB = DBFactory.open(this, "NewFilmDB");
        setValues(snappyDB);
} catch (SnappydbException e) {
        e.printStackTrace();
}

Film film1 = new Film("Green mile",60000000,new String[] {"Drama", "Fantasy"}),
  film2 = new Film("Gentlemen",22000000,new String[] {"Comedy", "Crime"}),
  film3 = new Film("In Bruges",15000000,new String[] {"Comedy", "Crime", "Thriller"});

        try {
            DB snappyDB = DBFactory.open(this, "NewFilmDB");
            snappyDB.put("FilmObj: Green Mile",film1);
            snappyDB.put("FilmObj: Gentlemen",film2);
            snappyDB.put("FilmObj: In Bruges",film3);
            String[] filmKeys = snappyDB.findKeys("FilmObj:");
            //   filmKeys    "FilmObj:"
            //      ,   
            for(int i = 0;i < filmKeys.length;i++) {
                Log.d("film_key: ",  filmKeys[i] + "\n");
            }

            Log.d("film_name: ",  snappyDB.getObject(filmKeys[2],Film.class).getName() + "\n");
            // -  ,    filmKeys

        } catch (SnappydbException e) {
            e.printStackTrace();
 }

try {

            DB snappyDB = DBFactory.open(this, "NewFilmDB");

            for (String[] batch : snappyDB.allKeysIterator().byBatch(1)) {
                //    (batch),     
                for (String key : batch) {
                    Log.d("film",snappyDB.getObject(key,Film.class).getName());
                }
            }
        } catch (SnappydbException e) {
            e.printStackTrace();
}

snappyDB.del("FilmObj: Gentlemen");

snappyDB.close();
snappyDB.destroy();

snappyDB.put("FilmObj: Gentlemen",new Film());
boolean isExist = snappyDB.exists("FilmObj: Gentlemen");// true
snappyDB.del("FilmObj: Gentlemen");
isExist = snappyDB.exists("FilmObj: Gentlemen");//false