Hi Brian,
I am glad that you have solved your problem.
With regards to your question about how weight works:
The weight property only has an effect if the view is trying to
"fill_parent" in a dimension with some other view. Since you have your
mysterious weight=300 as a property of a view that is only set to
fill_parent horizontally, it will only try to split the space it has
with views to the sides of it.
If you change the tag to:
<LinearLayout android:id="@+id/actionArea"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="9"
android:orientation="horizontal">
you should notice that the image gets 90% of the screen space
(vertically) regardless of the phone's orientation.
Why setting the weight to 300 when the height is set to wrap_content
is still a mystery to me though.
I hope this helps to your future understanding of weight!
@Mark:
I am not sure where you got the idea that weight was no longer used.
Gravity is very different to weight, affecting where views are
positioned within their layouts, as well as how text is justified.
On Nov 19, 11:06 pm, Brian Hsu <[EMAIL PROTECTED]> wrote:
> Thanks for all of your help.
>
> I found that I have some misunderstanding about android:layout_weight.
> I don't know why, but it seems conflict with the explation in
> Tutorial: Notepad Exercise 2.
>
> [Quote]
> If the first one has a layout_weight of 1 and the second has a
> layout_weight of 2, then one third of the remaining space will be
> given to the first, and two thirds to the second (because we claim the
> second one is more important).
> [/Quote]
>
> In the fact, It takes larger screen space when the I assign a smaller
> value.
>
> So, this is the XML code doing what I said before.
>
> [XML]
> <?xml version="1.0" encoding="utf-8"?>
>
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:orientation="vertical">
>
> <LinearLayout android:id="@+id/actionArea"
> android:layout_width="fill_parent"
> android:layout_height="wrap_content"
> android:layout_weight="300"
> android:orientation="horizontal">
> <ImageView android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:adjustViewBounds="true"
> android:src="@drawable/maid" />
>
> <LinearLayout android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="2"
> android:orientation="vertical">
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Dialer" />
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Contacts" />
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Applications" />
>
> </LinearLayout>
> </LinearLayout>
>
> <LinearLayout android:id="@+id/messageArea"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:layout_weight="1"
> android:orientation="vertical">
>
> <TextView android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Welcome to Android Phone." />
>
> <TextView android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Meow..." />
>
> </LinearLayout>
> </LinearLayout>
> [/XML]
>
> It works fine on both landscape of device except that I don't know why
> I have to assign a very large value of android:layout_weight in the
> LinearLayout with id actionArea, or the second TextView(Meow...) will
> missing when the device placed horizontally.
>
> Here is some screenshot.
>
> android:layout_weight="300" works on both.
>
> http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270503013613342114http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270503071347922322
>
> android:layout_weight="1" works only when the device is vertically
> placed.
>
> http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270503128655340514http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270503194578579346
>
> Finally, after I think about it more carefully, I found that since I'm
> using TextView as a message area, a better way might be assign a fixed
> height for it.
>
> Because this will ensuere that there is always a sufficient space to
> put the text on the screen no matter what device configuration used by
> the user.
>
> So, there is the final version of my UI XML code and screenshot, and
> it works perfectly for me.
>
> http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270507459983968850http://picasaweb.google.com.tw/brianhsu.hsu/CsRjrD#5270507516842311266
>
> [XML]
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:orientation="vertical">
>
> <LinearLayout android:layout_width="fill_parent"
> android:layout_height="wrap_content"
> android:layout_weight="1"
> android:orientation="horizontal">
> <ImageView android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:adjustViewBounds="true"
> android:src="@drawable/maid" />
>
> <LinearLayout android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="2"
> android:orientation="vertical">
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Dialer" />
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Contacts" />
>
> <Button android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> android:layout_weight="1"
> android:text="Applications" />
>
> </LinearLayout>
> </LinearLayout>
>
> <LinearLayout android:layout_width="wrap_content"
> android:layout_height="100px"
> android:layout_weight="1"
> android:orientation="vertical">
>
> <TextView android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Welcome to Android Phone." />
>
> <TextView android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Meow..." />
>
> </LinearLayout>
>
> </LinearLayout>
> [/XML]
>
> On 11月19日, 下午10時21分, "Mark Dodgson" <[EMAIL PROTECTED]>
> wrote:
>
> > I am new to this but I think android:weight is now an invalid attribute. You
> > should use android:gravity instead
>
> > Does this help?
>
> > 2008/11/19 ABTHUL RAZEETH <[EMAIL PROTECTED]>
>
> > > You can try like this.
>
> > > <ImageView * android:layout_height="30px"
> > > android:layout_width="30px"
> > > *
> > > android:adjustViewBounds="true"
> > > android:src="@drawable/image"
> > > android:weight="1" />
>
> > > On Wed, Nov 19, 2008 at 6:42 PM, [EMAIL PROTECTED] <
> > > [EMAIL PROTECTED]> wrote:
>
> > >> I have not actually used the imageview so far myself, so I'm not sure
> > >> if this will scale the image, but have you tried making the image and
> > >> the button both to have a width "fill parent", with a "wieght" of 1
> > >> each. In other words, tell the image + button to spread evenly between
> > >> the available space in the linearlayout?
>
> > >> To do this your code would change to:
>
> > >> ......snip!.......
> > >> <LinearLayout android:layout_width="fill_parent"
> > >> android:layout_height="wrap_content"
> > >> android:orientation="horizontal">
> > >> <ImageView android:layout_width="fill_parent"
> > >> android:layout_height="wrap_content"
> > >> android:adjustViewBounds="true"
> > >> android:src="@drawable/image"
> > >> android:weight="1" />
> > >> <Button android:layout_width="fill_parent"
> > >> android:layout_height="fill_parent"
> > >> android:text="Hello"
> > >> android:weight="1" />
> > >> </LinearLayout>
> > >> .......snip!.......
>
> > >> Please let me know if this works!
>
> > >> On Nov 19, 4:13 am, Brian Hsu <[EMAIL PROTECTED]> wrote:
> > >> > I would like make an UI consist with a ImageView, a button and two
> > >> > TextView in a vertical LinearLayout.
>
> > >> > But there is a problem -- my image seems consume too much screen
> > >> > space.
>
> > >> > I hope the system will left enough screen space to display two
> > >> > TextView.
>
> > >> > I also tried apply android:adjustViewBounds to the ImageView but still
> > >> > has no success. android:layout_weight seems not work neither.
>
> > >> > BTW, maxHeight works but I don't want to use it because I hope the
> > >> > image will adjust its size when user change the orientation of the
> > >> > device.
>
> > >> > What I want it to look like:
>
> > >> > +-----------------+
> > >> > |+-----+ +------+ |
> > >> > ||img | |button| |
> > >> > || | | |
> > >> > || | | | |
> > >> > |+-----| +------+ |
> > >> > | |
> > >> > |Hello World |
> > >> > |Meow... |
> > >> > | |
> > >> > +-----------------+
>
> > >> > But what I actually get is the two TextView is totally missing.
>
> > >> > The following is my UI XML file content, where should I check or
> > >> > modifiy?
>
> > >> > <?xml version="1.0" encoding="utf-8"?>
>
> > >> > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> > >> > android"
> > >> > android:layout_width="fill_parent"
> > >> > android:layout_height="fill_parent"
> > >> > android:orientation="vertical">
>
> > >> > <LinearLayout android:layout_width="fill_parent"
> > >> > android:layout_height="wrap_content"
> > >> > android:orientation="horizontal">
> > >> > <ImageView
>
> ...
>
> read more >>
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