Question

my problem is that when i try to set the text of service1 and service1Health in my code below, The text is not being set. Any ideas as to why this is happening? service1Name and service1HealthValue both have valid string values.

public void onClick(View v) 
{

    switch(v.getId())
    {
    case R.id.loginButton:
        String[] values = new String[2];
        String usernameText = ((TextView) activity.findViewById(R.id.usernameTextBox)).getText().toString();
        String passwordText = ((TextView) activity.findViewById(R.id.txtPasswordField)).getText().toString();

        if (usernameText.length()==0 || passwordText.length()==0)
            Toast.makeText(activity, "Please fill in both username and password fields", Toast.LENGTH_SHORT).show();
        else
        {
            Toast.makeText(activity, "Connecting to server", Toast.LENGTH_LONG).show();
            String loginResult = Server.login(usernameText,passwordText);

            values = loginResult.split(",");

            Intent i = new Intent(activity,Home.class);
            activity.startActivity(i);
            activity.setContentView(R.layout.home);

            String service1Name = Server.getServices("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
            String service1HealthValue = Server.getHealth("myservice","xxxxxxxxxxxxxxxxxxxxxxxxxxx");


            TextView service1= ((TextView) activity.findViewById(R.id.serviceName1));
            TextView service1Health= ((TextView) activity.findViewById(R.id.service1Health));


            service1.setText(service1Name);
            service1Health.setText(service1HealthValue);

        }
        break;
    }
}

Answer 1

When you call activity.startActivity(i);, it launches a new activity, so any code after this, including activity.setContentView(R.layout.home); will not be reached, so none of these TextViews will get set. If you want to set these values in the new activity, you should add them to the Intent, then reopen them in the onCreate method of the new Activity. So for example, in your current Activity:

Intent i = new Intent(activity,Home.class);
i.putExtra("service1Name", Server.getServices("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"));
i.putExtra("service1HealthValue", Server.getHealth("myservice","xxxxxxxxxxxxxxxxxxxxxxxxxxx"));
activity.startActivity(i);

And in the onCreate method of Home.java, add the following:

setContentView(R.layout.home);
Intent i = getIntent();
if (i != null) {
    //This means that the intent passed here was found
    String serviceName1 = i.getStringExtra("serviceName1");
    String service1HealthValue = i.getStringExtra("service1HealthValue");
    TextView service1= ((TextView) activity.findViewById(R.id.serviceName1));
    TextView service1Health= ((TextView) activity.findViewById(R.id.service1Health));
    service1.setText(service1Name);
    service1Health.setText(service1HealthValue);
}