import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;


public class DataBaseHelper extends SQLiteOpenHelper {

    String DB_PATH = null;
    private static String DB_NAME = "BeerDB";
    private SQLiteDatabase myDataBase;
    private final Context myContext;

    public DataBaseHelper(Context context) {
        super(context, DB_NAME, null, 10);
        this.myContext = context;
        this.DB_PATH = "/data/data/" + context.getPackageName() + "/" + "databases/";
        Log.e("Path 1", DB_PATH);
    }


    public void createDataBase() throws IOException {
        boolean dbExist = checkDataBase();
        if (dbExist) {
        } else {
            this.getReadableDatabase();
            try {
                copyDataBase();
            } catch (IOException e) {
                throw new Error("Error copying database");
            }
        }
    }

    private boolean checkDataBase() {
        SQLiteDatabase checkDB = null;
        try {
            String myPath = DB_PATH + DB_NAME;
            checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
        } catch (SQLiteException e) {
        }
        if (checkDB != null) {
            checkDB.close();
        }
        return checkDB != null ? true : false;
    }

    private void copyDataBase() throws IOException {
        InputStream myInput = myContext.getAssets().open(DB_NAME);
        String outFileName = DB_PATH + DB_NAME;
        OutputStream myOutput = new FileOutputStream(outFileName);
        byte[] buffer = new byte[10];
        int length;
        while ((length = myInput.read(buffer)) > 0) {
            myOutput.write(buffer, 0, length);
        }
        myOutput.flush();
        myOutput.close();
        myInput.close();

    }

    public void openDataBase() throws SQLException {
        String myPath = DB_PATH + DB_NAME;
        myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

    }

    @Override
    public synchronized void close() {
        if (myDataBase != null)
            myDataBase.close();
        super.close();
    }


    @Override
    public void onCreate(SQLiteDatabase db) {
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        if (newVersion > oldVersion)
            try {
                copyDataBase();
            } catch (IOException e) {
                e.printStackTrace();

            }
    }

    public Cursor query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy) {
        return myDataBase.query("PLEASE CHANGE TO YOUR TABLE NAME", null, null, null, null, null, null);
    }


}

import android.database.Cursor;
import android.database.SQLException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class CopyDbActivity extends AppCompatActivity {

Cursor c = null;

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

    ((Button) findViewById(R.id.button01)).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DatabaseHelper myDbHelper = new DatabaseHelper(CopyDbActivity.this);
            try {
                myDbHelper.createDataBase();
            } catch (IOException ioe) {
                throw new Error("Unable to create database");
            }
            try {
                myDbHelper.openDataBase();
            } catch (SQLException sqle) {
                throw sqle;
            }
            Toast.makeText(CopyDbActivity.this, "Successfully Imported", Toast.LENGTH_SHORT).show();
            c = myDbHelper.query("Products", null, null, null, null, null, null);
            if (c.moveToFirst()) {
                do {
                    Toast.makeText(CopyDbActivity.this,
                            "_id: " + c.getString(0) + "n" +
                                    "DATE: " + c.getString(1) + "n" +
                                    "TIME: " + c.getString(2) + "n" +
                                    "HEIGHT:  " + c.getString(3),
                            Toast.LENGTH_LONG).show();
                } while (c.moveToNext());
            }
        }
    });

}


}