How to update a row from a table in SQLite android by query statement?

My code that is not working update operation on Button click.

 Button update_user= (Button) findViewById(R.id.update_user)
 update_user.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View view) {

                SignIn_Signup.sqLiteDatabase.execSQL("UPDATE mytable  SET name = "+name1_updated.getText() +"
                        WHERE name=name1.getText()+  );


            }
        });

please help.