[android-developers] Re: Detecting key events from Dialog class?

As usual, I'm answering my own question, haha. I just needed to call:
this.setOnKeyListener(this);

On Dec 15, 11:14 pm, Paul Lamb <paulsc...@gmail.com> wrote:
> I've created a simple custom dialog that asks users to "Press a key".
> The purpose of this is so that I can map whatever key they press to a
> function in the app. Unfortunately, I can not figure out what is the
> correct interface to use to detect the key events. My class looks like
> this:
>
> ----------------------
> public class ScancodeDialog extends Dialog implements OnKeyListener
> {
>
>     public ScancodeDialog( Context context )
>     {
>         super(context);
>         setContentView( R.layout.scancode_dialog );
>         setTitle( "Key Listener" );
>         TextView text = (TextView) findViewById( R.id.scancode_text );
>         text.setText( "Please press a button.." );
>         ImageView image = (ImageView)
> findViewById( R.id.scancode_image );
>         image.setImageResource( R.drawable.icon );
>
> getWindow().setFlags( WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
>
> WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM );
>     }
>
>     @Override
>     public boolean onKey( DialogInterface dialog, int keyCode,
> KeyEvent event )
>     {
>         if( keyCode != KeyEvent.KEYCODE_MENU )
>             dismiss();
>         return true;
>     }}
>
> ------------------------------
>
> I've tried it with and without the getWindow().setFlags() line (that
> was a suggestion from another question, which didn't help me in my
> case). Obviously I will add more functionality to the class later, but
> for now the dialog box should close whenever the user presses a key.
> However, onKey is never called.
>
> I originally tried using the key listener interface from View:
>
> import android.view.View.OnKeyListener;
>
> But since a Dialog is not a view, this didn't work. I also tried the
> one from DialogInterface:
>
> import android.content.DialogInterface.OnKeyListener;
>
> This seemed like a better choice, since the API indicates that Dialog
> implements DialogInterface, but I am still not receiving the key
> events. Any suggestions I can try?

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