CODEWITHSUNDEEP
javaandroidandroid-alertdialogandroid-preferences
kcNeko
kcNeko

Reputation: 609

How to let alertDialog pop-out every time I run my app?

After installing the app, an alertDialog will pop-out. I wanted it to have a edit text field asking for the name of the user. After answering, it will never show again. Then afterwards, every time I open the app, another alertDialog will pop-out like a greeting to the user.

public class MainActivity extends Activity {
    final Context context = this;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        AlertDialog.Builder alert = new AlertDialog.Builder(context);
        alert.setTitle("Welcome");
        alert.setMessage("Enter Your Name Here"); 
        final EditText input = new EditText(context);
        alert.setView(input);
        alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
            } 
        });

        AlertDialog alertDialog = alert.create();
        alertDialog.show();

        AlertDialog.Builder a_builder = new AlertDialog.Builder(MainActivity.this);
        a_builder.setMessage("Mabuhay!")
                .setCancelable(true)
                .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });
        AlertDialog alert = a_builder.create();
        alert.show();
    }
}

Upvotes: 2

Views: 854

Answers (2)

DZDomi
DZDomi

Reputation: 1679

After the user has entered his name on the first open of your app, you can write the given username into the SharedPreferences of your Application.

When a user now opens the app at any other time, you can simply check if you have an entry in the sharedpreferences of your application, and greet the user with the appropriate user name.

//instance variable in the Mainactivity.class
private boolean showMessage = true;

SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
String username = sharedPref.getString("username", null);
if(username == null){
    //first time user - ask for username
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putString("username", enteredName);
    editor.commit();
    showMessage = false;
} else if(showMessage) {
    showMessage = false;
    //greet
    AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
    alert.setMessage("Hello " + username + "!")
            .setCancelable(true)
            .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
    alert.create().show();
}

Upvotes: 1

Dario
Dario

Reputation: 757

You can use two methods for do this. The first is by using the alert dialog like your example, you can find here how use dialogs.

Dialogs by Android Developer.

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.dialog_message)
       .setTitle(R.string.dialog_title);
AlertDialog dialog = builder.create();
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// Add the buttons
builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               // User clicked OK button
           }
       });
builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               // User cancelled the dialog
           }
       });
// Set other dialog properties
...

// Create the AlertDialog
AlertDialog dialog = builder.create();

Or you can create an anctivity dialog by setting in the manifest the dialog theme, and you can find it here.

for further explanations let me know!

Upvotes: 1

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