[android-developers] Re: Back key behaviour between Activity Groups.

To add on, dont forget to add the constructor to the PlayBackView with
context and AttributeSet

i.e.

public PlayBackrView(Context context, AttributeSet attrs) {
super(context, attrs);
......
......
}

On Nov 30, 11:52 am, akkilis <deepakverma.u...@gmail.com> wrote:
> Mahesh,
>
> Why dont you make a different class, say PlayBackView, extending
> LinearLayout and place the layout of the common component "Playback
> bar" in a different layout xml, say playback.xml.
>
> Now inflate the playback.xml in the PlayBackView.
>
> Now you can add this your custom view in any of the layout xml (home,
> A, B, C)
> as:
>
> <?xml version="1.0" encoding="utf-8"?>
> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
>         android:orientation="vertical" android:layout_width="fill_parent"
>         android:layout_height="fill_parent">
>         <com.packagename.PlayBackView
>                 android:id="@+id/playbackview" android:layout_width="match_parent"
>                 android:layout_height="wrap_contentt" />
>
>         <ImageView ------- etc etc/>
> </FrameLayout>
>
> In the PlayBackView class, you can define the onClick handlers or any
> other event handler as you want.
> Hope this will help you.
>
> On Nov 30, 7:59 am, MaheshSharma <maheshsharmasuco2...@gmail.com>
> wrote:
>
> > Hello All,
> > My app is kind of a music app and I have a playback bar that I need to
> > be visible across all the views.
>
> > I had three activities, A/B/C. Instead of adding the playback bar
> > explicitly to all  A,B,C. I added the Playback Bar to A and made A,B,C
> > as ActivityGroups.
>
> > Since, A has the playback bar, now I when I start B from A, I call
> > setContentView from A to show B.
>
> > The problem is, once I call setContentView to show B, and then if the
> > user presses back key in B, then it goes to home screen, instead of
> > coming to A.
>
> > I have seen some snippets on web, which maintain the view stack and
> > when user presses the back key they pop up the previous view.
>
> > I couldnt implement that.
>
> > Questions :
> > 1) Is there any better way to having a activity like Playback bar/
> > Status bars across all the views/activities ?
>
> > 2) If the above way is the only way to do it,then how can I handle the
> > back key?
>
> > With Regards
> > MS.

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