Creating Custom Dialog box (android example error?)

Question

Been trying to create customer dialog box and I copied source code from android website. I worked my way round a few things now I'm really stuck. I don't know what LoginFragment is in the code:

...
public class start extends Activity{
Button buttonx;
final Context context = this;
LayoutInflater mInflater;

@Override
protected void onCreate (Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.menu);
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    // Get the layout inflater
    //LayoutInflater inflater = getActivity().getLayoutInflater();
    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    builder.setView(mInflater.inflate(R.layout.login, null))
            // Add action buttons
            .setPositiveButton(R.string.signin, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int id) {
                    // sign in the user ...
                }
            })
            .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {

                    LoginDialogFragment.this.getDialog().cancel();
                }
            });
    return builder.create();
}

When I //comment the line out the line out it says @Override is unnecessary which doesnt solve anything. Sorry for noob question

Answer 1

Take a look in this post on android developers, was useful to me many times.

http://developer.android.com/guide/topics/ui/dialogs.html

here is a simples example also:

http://www.mkyong.com/android/android-custom-dialog-example/

Answer 2

I guess you might have figured it out that LoginFragment is a fragment, so you have to create a new class and extend it with Fragment class. There you may put your code onCreateDialog(). And then follow the steps as how to show it.

You will use this code to show it -

DialogFragment newFragment = new LoginFragment();
newFragment.show(getSupportFragmentManager(), "login");

refer the link rochasdv has shared, you will get a better idea. Ask me if missing anything.

Answer 3

Create a layout file for the view you want to show in the dialog. Suppose you want a textview and a button in a dialog:

dialog_box.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TextView
    android:id="@+id/textview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:textSize="17sp"
    android:layout_margin="20dp"/>

<Button
    android:id="@+id/button"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:textSize="17sp"
    android:layout_margin="20dp"/>

and in you java file:

    Dialog d = new Dialog(this);
    d.setTitle("No Places found");
    d.setContentView(R.layout.dialog_box);
    d.getWindow().getAttributes().width = WindowManager.LayoutParams.FILL_PARENT;
    d.show();

Good luck