Thank you, Mark, for the reply. For of all, I am pretty new to Android and my code is by no means doing things in the most meaningful way. :) Before answering your question, can I ask does using LinearLayout.LayoutParams prevent it from working? I tried to comment it out, but it still doesn't work.
In fact, this is just a trial code. What I really want to do is to tile a ViewGroup with a whole bunch of ImageViews. I want to specify the absolute location and dimensions of each ImageView inside the parent ViewGroup. However, it looks to me that I cannot do this. I found there is AbsoluteLayout, but it is deprecated. So do you know of any option to achieve this? Thank you very much. Frank On May 20, 3:03 am, Mark Murphy <[email protected]> wrote: > Why are you using LinearLayout.LayoutParams for a child of > aScrollViewsubclass? > > > > > > > > > > On Thu, May 19, 2011 at 9:21 PM, Frank <[email protected]> wrote: > > Hi All, > > > I have the following code. I only got a black screen without seeing > > the white image. > > > public class Demo extends Activity { > > private MyCtrl mCtrl; > > protected void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > > mCtrl = new MyCtrl(this); > > setContentView(mCtrl); > > } > > } > > > public class MyCtrl extendsScrollView{ > > > public MyCtrl (Context context) { > > super(context); > > setFocusable(true); > > > int width = 100; > > int height = 100; > > int size = width * height; > > int buf[] = new int[size]; > > for ( int i = 0; i < size; ++i) { > > buf[i] = 0xFFFFFFFF; //white image > > } > > > Bitmap bmp = Bitmap.createBitmap(buf, width, height, > > Bitmap.Config.ARGB_4444); > > ImageViewiv = newImageView(getContext()); > > iv.setLayoutParams( new LinearLayout.LayoutParams(width, height) ); > > iv.setImageBitmap(bmp); > > iv.setScaleType(ImageView.ScaleType.CENTER); > > addView(iv); > > } > > } > > > However, if I derive MyCtrl fromImageViewdirectly, the white image > > shows up. > > > Your help is highly appreciated. > > > Cheers, > > Frank > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy > > Android App Developer Books:http://commonsware.com/books -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
