Android: restaurar la base de datos borra la base de datos cuando falta el archivo de la base de datos

He encontrado un tutoriales que copia la base de datos en una carpeta como copia de seguridad y la vuelve a copiar en la carpeta de la base de datos de la aplicación como restauración. Casi todo funciona bien, excepto por una cosa: cuando elimino el archivo .db respaldado de mi carpeta y hago clic en Restaurar en mi aplicación, busca el archivo, no puede encontrarlo, luego sobrescribe toda la base de datos sin nada. Es como si vaciara toda la base de datos.

Apoyo:

try {

                    InputStream myInput;
                    OutputStream myOutput;

                    myInput = new FileInputStream("/data/data/com.me.myapp/databases/HotOrNotdbLists2");//this is
        // the path for all apps
        //insert your package instead packagename,ex:com.mybusiness.myapp


                    // Set the output folder on the SDcard
                     File directory = new File("/sdcard/MyApp/");
                    // Create the folder if it doesn't exist:
                    if (!directory.exists()) 
                    {
                        directory.mkdirs();
                    } 
                    // Set the output file stream up:

                    myOutput = new FileOutputStream(directory.getPath()+
         "/myapp.db");

                    // Transfer bytes from the input file to the output file
                    byte[] buffer = new byte[1024];
                    int length;
                    while ((length = myInput.read(buffer))>0)
                    {
                        myOutput.write(buffer, 0, length);
                    }
                    // Close and clear the streams

                    myOutput.flush();

                    myOutput.close();

                    myInput.close();
                    Toast.makeText(Settings.this, "Backup done successfully!", Toast.LENGTH_LONG).show();

                } catch (FileNotFoundException e) {
            Toast.makeText(Settings.this, "Backup unsuccessful! File cannot be created! Directory does not exist?", Toast.LENGTH_LONG).show();


                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
            Toast.makeText(Settings.this, "Backup unsuccessful!", Toast.LENGTH_LONG).show();


                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

Restaurar:

OutputStream myOutput;

                try {

                    myOutput = new FileOutputStream("/data/data/com.me.myapp/databases/HotOrNotdbLists2");


                    // Set the folder on the SDcard
                     File directory = new File("/sdcard/MyApp/");
                    // Set the input file stream up:

                    InputStream myInputs = new FileInputStream(directory.getPath()+ "/myapp.db");


                    // Transfer bytes from the input file to the output file
                    byte[] buffer = new byte[1024];
                    int length;
                    while ((length = myInputs.read(buffer))>0)
                    {
                        myOutput.write(buffer, 0, length);
                    }


                    // Close and clear the streams
                    myOutput.flush();

                    myOutput.close();

                    myInputs.close();   
                  Toast.makeText(Settings.this, "Restore done successfully!", Toast.LENGTH_SHORT).show();

                } catch (FileNotFoundException e) {
        Toast.makeText(Settings.this, "Restore unsuccessful! File not found! Directory does not exist?", Toast.LENGTH_LONG).show();


                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {   Toast.makeText(Settings.this, "Restore unsuccessful!", 
        Toast.LENGTH_SHORT).show();


                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

Editar: Agregué la respuesta de Jason y aún borra la base de datos, incluso si obtengo false al directorio B y obtener el ¡Restaurar sin éxito! ¡Archivo no encontrado! ¿El directorio/archivo no existe? mensaje ???!?!

try {
                        OutputStream myOutput;   
                        myOutput = new FileOutputStream("/data/data/com.me.myapp/databases/HotOrNotdbLists2");

                        // Set the folder on the SDcard
                        File directory = new File("/sdcard/MyApp/");
                        boolean directoryB = new File("/sdcard/MyApp/", "/myapp.db").exists();
   Toast.makeText(Settings.this, "directoryB: " + directoryB, Toast.LENGTH_SHORT).show();

                        if (directoryB == true)
                        {
                           Toast.makeText(Settings.this, "File exists!", Toast.LENGTH_SHORT).show();

                        // Set the input file stream up:

                        InputStream myInputs = new FileInputStream(directory.getPath()+ "/myapp.db");


                        // Transfer bytes from the input file to the output file
                        byte[] buffer = new byte[1024];
                        int length;
                        while ((length = myInputs.read(buffer))>0)
                        {
                            myOutput.write(buffer, 0, length);
                        }


                        // Close and clear the streams
                        myOutput.flush();

                        myOutput.close();

                        myInputs.close();   
                        Toast.makeText(Settings.this, "Restore done successfully!", Toast.LENGTH_SHORT).show();
                        }
                        else
                        {
                            Toast.makeText(Settings.this, "Restore unsuccessful! File not found! Directory/file does not exist?", Toast.LENGTH_SHORT).show();
                        }

                    } catch (FileNotFoundException e) {
            //Toast.makeText(Settings.this, "Restore unsuccessful! File not found! Directory does not exist?", Toast.LENGTH_LONG).show();


                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {   Toast.makeText(Settings.this, "Restore unsuccessful!", 
            Toast.LENGTH_SHORT).show();


                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }