Android SQLite Database Connnectivity

import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {

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

    public void btnAddClick(View view) {

        EditText editText = (EditText)findViewById(R.id.etName);
        String strExpense = editText.getText().toString();
        SQLiteDatabase sqLiteDatabase = openOrCreateDatabase("ExpenseDB",  MODE_PRIVATE, null);

        String create = "CREATE Table IF NOT EXISTS Expenses (ExpenseId integer primary key autoincrement, ExpenseName varchar(40));";
        sqLiteDatabase.execSQL(create);

        String insert = "INSERT INTO Expenses (ExpenseName) values ('" + strExpense + "');";
        sqLiteDatabase.execSQL(insert);
        Toast.makeText(MainActivity.this, "Record Saved", Toast.LENGTH_SHORT).show();
        editText.setText("");

        }

    public void btnShowClick(View view) {
        SQLiteDatabase sqLiteDatabase = openOrCreateDatabase("ExpenseDB",  MODE_PRIVATE, null);

        String strSelect  = "select * from Expenses;";
        Cursor cursor = sqLiteDatabase.rawQuery(strSelect, null);
        TextView textView = (TextView)findViewById(R.id.tvExpense);
        if(cursor.getCount() > 0)
        {
            cursor.moveToFirst();
            do {
                String expense = cursor.getString(1);
                textView.setText(textView.getText() + "\n" + expense);
            }while (cursor.moveToNext());
        }
    }
}