is it because i am calling it from a handler ?

this handler is a private member variable of my activity

private Handler myhandler = new Handler() {
         /* (non-Javadoc)
          * @see android.os.Handler#handleMessage(android.os.Message)
          */
                @Override
                public void handleMessage(Message msg) {
                        switch (msg.what) {
                        case FINISHED:
                                ShowAlert();
                                break;

                        }
                        super.handleMessage(msg);
                }
    };

On Nov 23, 9:08 pm, Jags <jag...@gmail.com> wrote:
> ok! i moved the code to onCreateDialog
>
>  and even tough vg is null, it created the alert. but should vg be
> null ?
>
> but it crashed again !
>
> here is code
>
> protected Dialog onCreateDialog(int id) {
>
>                 AlertDialog.Builder builder;
>                 AlertDialog alertDialog = null;
>
>                 Context mContext = getApplicationContext();
>                 LayoutInflater inflater = (LayoutInflater) 
> mContext.getSystemService
> (LAYOUT_INFLATER_SERVICE);
>
>             switch(id) {
>             case MY_DIALOG_ID:
>
>                         ViewGroup vg = (ViewGroup) 
> findViewById(R.id.layout_root);
>                         View layout = inflater.inflate(R.layout.mydialog,
>                                                        vg);
>
>                         builder = new AlertDialog.Builder(mContext);
>                         builder.setView(layout);
>                         alertDialog = builder.create();
>
>                 break;
>
>             default:
>
>                 alertDialog = null;
>             }
>
>             return alertDialog;
>         }
>
> void CheckHighScore() {
>
> showDialog(MY_DIALOG_ID);
>
>         }
>
> On Nov 23, 8:26 pm, Jags <jag...@gmail.com> wrote:
>
> > I understand that this is coming null because my current activity
> > layout is main.xml. but is it that i need to do a setlayout to
> > mydialog before starting any of my code ?
>
> > On Nov 23, 8:11 pm, Jags <jag...@gmail.com> wrote:
>
> > > I have written below code for showing a custom dialog
>
> > >         void CheckHighScore() {
>
> > >                         AlertDialog.Builder builder;
> > >                         AlertDialog alertDialog;
>
> > >                         Context mContext = getApplicationContext();
> > >                         LayoutInflater inflater = (LayoutInflater) 
> > > mContext.getSystemService
> > > (LAYOUT_INFLATER_SERVICE);
> > >                         ViewGroup vg = (ViewGroup) 
> > > findViewById(R.id.layout_root);
> > >                         View layout = inflater.inflate(R.layout.mydialog,
> > >                                                        vg);
>
> > >                         builder = new AlertDialog.Builder(mContext);
> > >                         builder.setView(layout);
> > >                         alertDialog = builder.create();
>
> > >                         alertDialog.show();
>
> > >         }
>
> > > __________
> > > xml file
> > > __________
>
> > > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> > > android"
> > >         android:id="@+id/layout_root" android:orientation="vertical"
> > >         android:layout_width="fill_parent"
> > > android:layout_height="fill_parent"
> > >         android:padding="10dp">
> > >         <TextView android:id="@+id/desc" android:text="@string/ask_info"
> > > android:layout_width="wrap_content"
> > >                 android:layout_height="wrap_content" 
> > > android:textColor="#FFF" />
>
> > >         <EditText android:text="Enter your info here" android:id="@+id/
> > > yourinfo" android:layout_width="wrap_content"
> > > android:layout_height="wrap_content"></EditText>
> > > </LinearLayout>
>
> > > it is unable to find ViewGroup in above code and is crashing. I have
> > > another main.xml file which is set to content layout in this activity.
> > > So how can I correct this thing ?
>
> > > Also I need to add some validation here to this dialog like info
> > > cannot be empty !
>
> > > thanks in advance
> > > Jags

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