Button btn;
EditText et;
Connection con;
String prueba, un, pass, db, ip;
Statement stt;
TextView t;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btn = (Button) findViewById(R.id.button);
    et = (EditText) findViewById(R.id.editText);

    //ip = "145.14.144.52";
    t = findViewById(R.id.textView);
    t.setVisibility(View.INVISIBLE);
    db = "id3001279_unasproofs";
    ip = "jdbc:mysql://000webhost.com:3306/"+db;
    un = "id3001279_unasproofs";
    pass = "******";

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            prueba = et.getText().toString();
            try {
                Class.forName("com.mysql.jdbc.Driver");
                        //.newInstance();
                con = (Connection) DriverManager.getConnection(ip, un, pass);
                stt = con.createStatement();
                String query = "INSERT INTO txumino VALUES(" +et.getText().toString() + ");";
                ResultSet rs = stt.executeQuery(query);
            }catch (Exception e){
                t.setVisibility(View.VISIBLE);
            }


        }
    });
}