I'm very new to Android development and I'm trying to figure out how to use the RelativeLayout tag to position my Views. My goal is to have a large TextView on the left, with two ButtonViews to the right of it, stacked on top of each other. Here's the XML code I'm using:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/wood_tile">
<TextView
android:id="#+id/life_counter"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="00" />
<Button android:text="#string/button_up"
android:id="#+id/button_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/life_counter"/>
<Button android:text="#string/button_down"
android:id="#+id/button_down"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/button_up"/>
</RelativeLayout>
I feel that I must not be using the tag properly. Can someone explain how it works? Thanks in advance.
You have the left side TextView's width set to fill_parent, this will make it consume the entire screen. Anything placed to the right of it will be off screen. Use wrap_content or a specific width for the elements within the relative layout.
Your approach is also a bit off. If you want the two buttons aligned to the right of the screen, use this:
<RelativeLayout
android:id="#+id/main_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/life_counter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00" />
<Button android:text="Button Up"
android:id="#+id/button_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"/>
<Button android:text="Button Down"
android:id="#+id/button_down"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/button_up"/>
</RelativeLayout>
Related
I wish to keep a button at the bottom of my Activity screen. It has to be fixed irrespective of the size of scrollview above it. The problem is that once the textviews of the scrollview take up some place, the height of my button keeps decreasing and it eventually gets pushed out of the activity screen. This is the layout I am using.
<?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">
<TextView android:id="#+id/tvBanner" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" android:gravity="center"
android:text="Practice Exam" />
<ScrollView android:id="#+id/Scroll" android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout android:id="#+id/LinearLayout1"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:id="#+id/tvDesc" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_margin="10dp"
android:gravity="center" android:paddingTop="40dp" android:text="#string/welcom"
android:textSize="20sp" />
<TextView android:id="#+id/tvURL" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginBottom="30dp"
android:paddingTop="10dp" android:layout_gravity="center"
android:text="hello" android:textColor="#android:color/white"
android:typeface="sans" />
</LinearLayout>
</ScrollView>
<RelativeLayout android:layout_width="fill_parent"
android:layout_height="fill_parent" android:gravity="bottom">
<Button android:id="#+id/btBottom" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"
android:text="Enter" />
</RelativeLayout>
</LinearLayout>
I have also tried using android:weight=1 and android:layout_height=0dp in the Scrollview. But this removes the entire Scrollview portion from my activity and I can't see anything.
I do know that there are many similar questions asked about this and believe me, I have tried many of these. However, none of the tricks have worked for me. I have spent almost half a day fixing this. Kindly help.
For a case like this always use RelativeLayouts. A LinearLayout is not intended for such a usage.
Try this:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true">
<Button android:id="#+id/btBottom"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Enter"
android:layout_alignParentBottom="true"/>
<ScrollView
...
android:layout_above="#id/btnGetMoreResults"/>
</RelativeLayour>
You should try using RealativeLayout instead of Linear, and then you could use
android:layout_above="#+id/btBottom"
android:layout_alignParentBottom="true"
That should solve your problem.
looks like you need 'alignParentBottom' in your button like this
<Button android:id="#+id/btBottom"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Enter" />
Do not wrap Button to RelativeLayout
Set layout_height of ScrollView to 0dp
Add layout_weight of ScrollView to 1
For this it would probably be a good idea if you used RelativeLayout for the outer wrapper layout. Then you could just set the layout with the button inside to LinearLayout and set layout_alignParentButtom="true" while you set your #+id/Scroll to layout_alignParentTop="true"
Also, you should probably set the layout with the button inside´s height to wrap_content instead of fill_parent
Why do you use a LinearLayout at top level at all ?
Choose a RelativeLayout with fill/fill and the following three childern (no further nesting !):
1) TextView with android:layout_alignParentTop="true" and android:layout_centerHorizontal="true"
2) Button with android:layout_alignParentBottom="true" and android:layout_centerHorizontal="true"
3) ScrollView with android:layout_below=#id/textview_id and android:layout_above="#id/button_id"
I didn't test it though, but give it a try.
I've got a bit of a problem aligning my buttons. I want to get them at (roughly) 1/3rd and 2/3rd of my screen (I provided a screenshot below to make things a bit more clear)
My code is the following:
<?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"
android:background="#drawable/mainbg">
<Button
android:text="#string/topbutton"
android:background="#drawable/silvertablesbuttonbgkort"
android:id="#+id/topbutton"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
<Button
android:text="#string/midbutton"
android:background="#drawable/silvertablesbuttonbglang"
android:id="#+id/midbutton"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
<RelativeLayout
android:id="#+id/underbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<Button
android:text="#string/underbartekst"
android:background="#drawable/silvertablesunderbar"
android:id="#+id/underbarbutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:textSize="20dp"
android:gravity="left|center_vertical" >
</Button>
</RelativeLayout>
I'm trying to get it to look like this: (I'm sorry if posting screenshot mock-ups is frowned upon here, I just couldn't think of a better way to clear up what I'm trying to do)
It seems that I can't post images because I'm too new here... So here is a link to the screenshot: http://i.imgur.com/l3b3z.png
My initial idea was just wrapping a vertical linear layout around the two buttons and putting empty textviews above and in between the two, which would actually work if this app was meant to be running on one screen size, but I'm pretty sure it'd mess up on every phone with another screen resolution. I solved this problem for the bar at the bottom by using a relativelayout with android:layout_alignParentBottom="true", but I can't really think of a way to snap to 1/3rd or 2/3rd. Is there a way to do this that will work with various screen resolutions?
Edit:
I solved my problem! I tried to post it as an answer, but I can't until in 8 hours. Will do then, but for now, I'll just post it as an edit here:
I've placed a TextView of 0x0 in the middle of the screen, and put RelativeLayouts on top of and below it, filling the screen. Then I placed two TextViews of 0x0 in the middle of those layouts, and within those layouts, two new RelativeLayouts. One below the highest TextView, one above the lowest. I placed my buttons in the center of those layouts. It works like a charm, and does not rely on anything but the code itself. This is my code now:
<?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"
android:background="#drawable/mainbg">
<TextView
android:text=" "
android:id="#+id/ankermidden"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldboven"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/ankermidden">
<TextView
android:text=" "
android:id="#+id/ankerboven"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldmidboven"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ankerboven">
<Button
android:text="#string/topbutton"
android:background="#drawable/silvertablesbuttonbgkort"
android:id="#+id/topbutton"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="#+id/ankerveldonder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ankermidden">
<TextView
android:text=" "
android:id="#+id/ankeronder"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldmidonder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/ankeronder">
<Button
android:text="#string/midbutton"
android:background="#drawable/silvertablesbuttonbglang"
android:id="#+id/midbutton"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="#+id/underbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<Button
android:text="#string/underbartekst"
android:background="#drawable/silvertablesunderbar"
android:id="#+id/underbarbutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:textSize="20dp"
android:gravity="left|center_vertical" >
</Button>
</RelativeLayout>
So yeah, that was easier than I thought.
I have found a solution! One that is completely relative to itself, and does not rely on pixels or density pixels at all.
I've placed a TextView of 0x0 in the middle of the screen, and put RelativeLayouts on top of and below it, filling the screen.
Then I placed two TextViews of 0x0 in the middle of those layouts, and within those layouts, two new RelativeLayouts. One below the highest TextView, one above the lowest. I placed my buttons in the center of those layouts.
It works like a charm, and does not rely on anything but the code itself.
This is my code now:
<?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"
android:background="#drawable/mainbg">
<TextView
android:text=" "
android:id="#+id/ankermidden"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldboven"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/ankermidden">
<TextView
android:text=" "
android:id="#+id/ankerboven"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldmidboven"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ankerboven">
<Button
android:text="#string/topbutton"
android:background="#drawable/silvertablesbuttonbgkort"
android:id="#+id/topbutton"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="#+id/ankerveldonder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ankermidden">
<TextView
android:text=" "
android:id="#+id/ankeronder"
android:layout_centerVertical="true"
android:layout_width="0dp"
android:layout_height="0dp">
</TextView>
<RelativeLayout
android:id="#+id/ankerveldmidonder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/ankeronder">
<Button
android:text="#string/midbutton"
android:background="#drawable/silvertablesbuttonbglang"
android:id="#+id/midbutton"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="#+id/underbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<Button
android:text="#string/underbartekst"
android:background="#drawable/silvertablesunderbar"
android:id="#+id/underbarbutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:textSize="20dp"
android:gravity="left|center_vertical" >
</Button>
</RelativeLayout>
So yeah, that was easier than I thought.
Bill Gary suggested using a margin in dp which would keep the same proportions on different screen sizes, but after a lot of experimenting, things end up looking weird for me on different screens again.
I'll do some more experimenting before I'll get back to that, because this whole dip-margins thing is weirding me out... Things that should be displayed properly are not, and things that just shouldn't, do, on some screen resolutions.
I'll start doing my homework on that stuff, but for now, albeit it being a bit long, the code I posted above works flawlessly for me.
try this, you may have to adjust the dp android:layout_marginTop="150dp"
<Button
android:text="#string/topbutton"
android:background="#drawable/silvertablesbuttonbgkort"
android:id="#+id/topbutton"
android:layout_alignParentRight="true"
android:layout_marginTop="150dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center|center_vertical">
</Button>
A custom Dialog box with a RelativeLayout contains a Button widget that won't change its margins, regardless of direction. Here's the xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="horizontal" android:background="#99000000">
<TextView android:id="#+id/dialogtitle" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="Some text" />
<TextView android:id="#+id/dialogtext" android:layout_width="300dp"
android:layout_height="wrap_content" android:textSize="15dp"
android:layout_alignParentLeft="true" android:layout_below="#id/dialogtitle"
android:paddingLeft="8dp" />
<Button android:id="#+id/dialogbuttoninfo" android:layout_width="80dp"
android:layout_height="wrap_content" android:text="Doesn't care about margins"
android:layout_alignParentRight="true" android:layout_marginLeft="128dp" />
</RelativeLayout>
Padding works but only moves the text inside the button. Any suggestions?
This seems crappy but have you tried putting it all in a LinearLayout instead? or perhaps removing android:orientation="horizontal". I dont think RelativeLayout cares about orientation from what I've seen. Also I think, but might be wrong, that if you do a LinearLayout then you won't need to have android:layout_alignParentLeft="true" in there either.
After cleaning it up a bit (sorry but its so hard to read when its compressed as it was in the question) you also didn't state where the last TextView , dialogbuttoninfo was supposed to be relative to everything else, I think you have to do that for Relative layouts to behave properly, I've had some squirrely things happen.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#99000000">
<TextView
android:id="#+id/dialogtitle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Some text" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/dialogtext"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:textSize="15dp"
android:layout_alignParentLeft="true"
android:paddingLeft="8dp" />
<Button
android:id="#+id/dialogbuttoninfo"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="Doesn't care about margins"
android:layout_alignParentRight="true"
android:layout_marginLeft="128dp" />
</LinearLayout>
</LinearLayout>
You may need to align the left of the button against something before the margin has real meaning.
Hy!
I have two pictures on the view and a button at the buttom.
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content" android:layout_width="fill_parent" android:orientation="vertical">
<TextView android:layout_height="wrap_content" android:id="#+id/mainscreen" android:layout_width="fill_parent" android:text="Selected Channel" android:gravity="center" android:layout_alignParentTop="true"></TextView>
<ImageView android:id="#+id/ImageView01" android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageView>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="#+id/mainscreen_state" android:layout_above="#+id/mainscreen_btchange"></TextView>
<ImageView android:layout_width="wrap_content" android:layout_centerHorizontal="true" android:layout_height="wrap_content" android:id="#+id/ImageAd" android:layout_gravity="center" android:layout_below="#+id/mainscreen"></ImageView> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent">
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:id="#+id/mainscreen_btchange"
android:text="Change State"></Button>
</RelativeLayout>
</LinearLayout>
My Question: How to shrink the pictures that all elements of the layout are shown?
For more complicated layouts where I need to ensure a bunch of items can all be displayed, I usually start with a RelativeLayout as my outermost container. I dock whatever needs to be at the extremities with layout_alignParentTop and layout_alignParentBottom (in the case of vertical layouts, which yours seems to be), and then I work my in making the next set of elements relative to them. Basically, start at the edges and work your way in.
So, in your case, the Button should have the attribute android:layout_alignParentBottom="true", and the TV should have android:layout_above="#+id/mainscreen_btchange". The TextView at the top should have android:layout_alignParentTop="true" and the ImageView underneath it should have android:layout_below="#+id/mainscreen"
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:text="Title"
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30px"
android:textStyle="bold"
>
</TextView>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="60px">
<Button
android:text="Choose a Story"
android:id="#+id/choose"
android:layout_width="150px"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="1px">
</Button>
<Button
android:text="Info"
android:id="#+id/info"
android:layout_width="150px"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="1px">
</Button>
</LinearLayout>
</LinearLayout>
In this code, as you can see, there is a title, 2 linear layouts, and 2 buttons that are inside a linear layout. What I'm trying to do is center the 2 buttons. No matter what I do, I can never get the 2 buttons to be centered at the bottom with a height of 60px.
In the end I'm trying to make the text centered both vertically and horizontally, and have the 2 buttons on the bottom centered horizontally. What do I need to change?
Heres a picture of what it looks like in the Layout Editor.
On your inner linear layout, set the layout_gravity.
Here's one solution
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:text="Title"
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30dip"
android:textStyle="bold"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="60dip"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="1dip"
>
<Button
android:text="Choose a Story"
android:id="#+id/choose"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
/>
<Button
android:text="Info"
android:id="#+id/info"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
/>
</LinearLayout>
</FrameLayout>
In general, you should style the outermost component (container) which will then position all of its children accordingly. As a side not, this layout would be achieved using just a single (or pair, depending on exactly what you're trying to do) or FrameLayouts, which would significantly reduce the layout overhead. While there's nothing wrong with LinearLayout, it is surprisingly computationally expensive.