package com.tcp.passwordkeeper; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { private Connection con = new Connection("192.168.2.110",1980); Button b; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b = findViewById(R.id.button); } public void onclick(View view){ con.connect(); } public void onclick2(View view){ con.send("Das ist eine Message"); } }