A little background info: I am a C++ developer who has worked very
little with Java. Picking up Java wasn't very difficult since I know C+
+, but I am still playing around with the SDK. (In C++, my favorite
SDK/API is Qt)
Anyway, I am trying to stick to the Model-View-Controller design
philosophy, and was setting up the UI in XML. However, it is not
working out the way I wanted it too. I am trying to write a simple app
(to help get started with learning the SDK), where there are 4
buttons, all of which cause a different operation on a value in a
textview. For example, the textview starts out at 100, and I have 4
buttons: +1, -1, +5, -5. When you press +1, it adds 1 to the value in
the textview. When you press -5, it subtracts 5 from the value in the
textview, etc etc...
That part is working fine. However, I am trying to setup the UI as
follows:
[TextView]
[+1] [-1]
[+5] [-5]
Basically, I want all the + in one column, and all the - in another
column. I figured I would use a relativeLayout, however, it is not
working the way I want it to. I am getting the following
[TextView] [-5]
[+1]
[+5]
(the -1 button is totally missing)
I have tried to narrow down possible errors in my code, and I have
come to the conclusion that either I am using android:layout_toRightOf
wrong, or I misunderstand how this command is implemented.
Here is my main.xml file:
(note: bu1p = button for +1, bu1m = button for -1 [p=positive
m=minus]. I also have a custom button in there, so there are really 6
buttons in total)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android";
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id = "@+id/nums"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize = "20sp"
android:text = "100"
/>
<Button
android:id = "@+id/bu1p"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "+1"
android:layout_below="@id/nums"
/>
<Button
android:id = "@+id/bu1m"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "+1"
android:layout_toRightOf="@id/bu1p"
/>
<Button
android:id = "@+id/bu5p"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "+5"
android:layout_below="@id/bu1p"
/>
<Button
android:id = "@+id/bu5m"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "-5"
android:layout_toRightOf="@id/bucm"
/>
<Button
android:id = "@+id/bucp"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "Custom"
android:layout_below="@id/bu5p"
/>
<Button
android:id = "@+id/bucm"
android:layout_width="70sp"
android:layout_height="wrap_content"
android:text = "Custom"
android:layout_toRightOf="@id/bu5p"
/>
</RelativeLayout>
Again, just to clarify, this is how I want the UI to look:
[TextView]
[+1] [-1]
[+5] [-5]
[+c] [-c]
(c is the custom value)
Any help is greatly appreciated. Sorry for the weird tab formatting,
it didn't copy over correctly from Eclipse.
Thank you,
Jon
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