Question

Im completely new to Android so apologies if this is a silly question. But my problem is this:

I have created a number of classes for each of the pages in my app and I would like to update the text in a textview of a particular class from the text in an edittext field from another class.

To be more specific, I have a login page and I want the username (input by the user in an edittext box) to be transferred to a textfield in the logged in page. Currently I am trying to achieve this by using a click listener for the log in button in the log in page:

public void sign_in_click(View view) {
    EditText tv1 = (EditText) findViewById(R.id.txt_input_uname);

    String username=tv1.getText().toString();

    LoginDetails unamede=new LoginDetails();
    unamede.setuname(username);

    Intent myIntent = new Intent(view.getContext(), customer.class);
    startActivityForResult(myIntent, 0); 

}

So the click listener initialises a new class variable I have defined in another class like so:

public class LoginDetails {
public String uname;

public void setuname(String username){
        uname=username;     
}

public String getuname(){
    return uname;   
}
}

and it gives uname the username from the edittext box in the login page.

Then I have in the logged in page under oncreate:

LoginDetails unamed= LoginDetails();
String username=unamed.getuname();

tv1.setText(username);

but the text in the textview box doesnt get anything written to it. Now I wont be surprised if I’m doing this completely wrong but any advice would be much appreciated. thanks

Answer 1

What i would suggest is put the user’s log in information into a SharedPreference. To transfer the date to another activity.

For example…

 SharedPreferences myPrefs = getSharedPreferences("USER_INFO", 0);
 myPrefsEdit.putString("USER_ID", username=tv1.getText().toString(););
 //This is the username you get from edittext

 myPrefsEdit.putString("PASSWORD", password);
 //this is the user password you get from edittext

 myPrefsEdit.commit();

In your next activity.

Get reference to your SharePreference like…

SharedPreferences info = getSharedPreferences("USER_INFO, 0);
String username = info.getString("USER_ID", "DOESNT EXIST");
String userpassword = info.getString("PASSWORD", "DOESNT EXIST");

This should do it