@Override public void onClick(View view) { switch (view.getId()) { case R.id.bt: DatabaseHelper myDbHelper = new DatabaseHelper(this); usuario = et.getText().toString(); try { myDbHelper.createDatabase(); } catch (Exception e) { throw new Error("No se creo"); } try { myDbHelper.openDataBase(); SQLiteDatabase db = myDbHelper.getWritableDatabase(); ContentValues valores = new ContentValues(); valores.put("dni", "009"); valores.put("nombre", usuario); valores.put("apellido", "NH"); db.insert("usuarios", null, valores); db.close(); myDbHelper.close(); } catch (SQLException sqle) { throw sqle; } break; case R.id.bt2: DatabaseHelper myDbHelper2 = new DatabaseHelper(this); usuario = et.getText().toString(); try { myDbHelper2.createDatabase(); } catch (Exception e) { throw new Error("No se pudo crear"); } try { myDbHelper2.openDataBase(); Cursor cursor = myDbHelper2.buscarusuario(usuario); if (cursor != null) { tv1.setText(cursor.getString(0)); tv2.setText(cursor.getString(1)); cursor.close(); myDbHelper2.close(); } else { cursor.close(); myDbHelper2.close(); } } catch (Exception e) { } break; default: break; } }