In my horizontal LinearLayout I have a TextEdit and an ImageButton. The ImageButton is as high as the TextEdit.
I'd like that the ImageButton is exactly as wide as it's long.
At the moment it looks like the width of the ImageButton is like when there is no scaling (ImageButton width [px] = unscaled drawable width [px]):
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="#+id/txtName"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<ImageButton
android:id="#+id/btSet"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:scaleType="fitEnd"
android:src="#drawable/pin2" />
</LinearLayout>
How it should look like:
Try this, I think this should work:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/btSet"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:scaleType="centerInside"
android:adjustViewBounds="true"
android:src="#drawable/pin2" />
<EditText
android:id="#+id/txtName"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toLeftOf="#id/btSet" />
</RelativeLayout>
Explaination: centerInside will assure that the image will scale proportionally within the bounds of the ImageButton. adjustViewBounds="true" will...well, adjust the view's bounds, if the image needed to be scaled.
try adding
adjustViewBounds="true"
to the ImageButton, that should clip the excess width
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="#+id/txtName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<ImageButton
android:id="#+id/btSet"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/pin" />
</LinearLayout>
Use
android:scaleType="fitCenter"
or android:scaleType="centerInside"
in the ImageButton in xml File.
I might be a bit late to the party.
However there's an easy way to achieve this behavior by overriding the onMeasure().
Here's how it'd look like :
public class MySquareImageButton extends ImageButton {
public MySquareImageButton(Context context) {
super(context);
}
public MySquareImageButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MySquareImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//(1)if you want the height to match the width
super.onMeasure(widthMeasureSpec, widthMeasureSpec);
//(2)if you want the width to match the height
//super.onMeasure(heightMeasureSpec, heightMeasureSpec);
}
}
And then you'd simply replace your XML's ImageButton with this custom one :
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="#+id/txtName"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<com.whatever_your_package.MySquareImageButton
android:id="#+id/btSet"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:scaleType="fitEnd"
android:src="#drawable/pin2" />
</LinearLayout>
You'd simply put wrap_content to width or height, depending on which one you want to dictate the size of your button.
In the case you want your button to wrap its height to the image, and that the width simply matches the height, you'd use
android:layout_width="wrap_content"
android:layout_height="wrap_content"
and use
//(2)if you want the width to match the height
//super.onMeasure(heightMeasureSpec, heightMeasureSpec);
I had the same problem.
I was trying to create something that looked like this:
But what I was getting was this:
The ImageButton was getting stretched horizontally.
All the top answers didn't work for me. But I noticed people mentioning layout_weight and just looked it up out of curiosity and found the following on Android docs:
Layout Weight
LinearLayout also supports assigning a weight to individual children with the android:layout_weight attribute. This attribute assigns an "importance" value to a view in terms of how much space it should occupy on the screen. A larger weight value allows it to expand to fill any remaining space in the parent view. Child views can specify a weight value, and then any remaining space in the view group is assigned to children in the proportion of their declared weight. Default weight is zero.
For example, if there are three text fields and two of them declare a weight of 1, while the other is given no weight, the third text field without weight will not grow and will only occupy the area required by its content. The other two will expand equally to fill the space remaining after all three fields are measured. If the third field is then given a weight of 2 (instead of 0), then it is now declared more important than both the others, so it gets half the total remaining space, while the first two share the rest equally
So basically, if you set the layout_width to be 0 for an element, it'll appear according to the dimensions of its content.
If you set it to anything else, the element will fight for extra space in the parent element that contains it; with more weighted elements taking up more space.
So, when I set layout_width = 0 for both TextView and ImageButton in my example, neither of them takes up any extra space and they both huddle up to the left.
But when I set it to 1 for TextView and 0 for ImageButton, the ImageButton doesn't take any more space than required by its content; while the TextView takes up all the extra space and pushes ImageButton to the right.
Just the way I want it.
Initially, what had happened was both the elements were set to have a default layout_weight of 1 and hence both were equally competing for the extra space.
Simply use the weightSum to devide the size of controls accordingly...
<?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">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1.0" >
<EditText
android:id="#+id/txtName"
android:layout_weight="0.8"
android:layout_height="wrap_content"
android:layout_width="0dp"
android:inputType="text"
android:singleLine="true"/>
<ImageButton
android:id="#+id/btSet"
android:layout_weight="0.2"
android:layout_height="wrap_content"
android:layout_width="0dp"
android:scaleType="fitEnd"
android:src="#drawable/pin2" />
</LinearLayout>
</LinearLayout>
Hope it will help you.
as you want your ImageButton is stretchable & exactly as wide as it's long, its better to use NinePatch Image. you may find help form here Draw 9-patch & How does Android’s nine-patch tool work ?
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1.0" >
<EditText
android:id="#+id/txtName"
android:layout_weight="0.75" // this work like percentage adjust as u want 70 or 75
android:layout_height="wrap_content"
android:layout_width="0dp"
android:inputType="text"
android:singleLine="true"/>
<ImageButton
android:id="#+id/btSet"
android:layout_weight="0.25" // this work like percentage adjust as u want 25 or 30
android:layout_height="wrap_content"
android:layout_width="0dp"
android:scaleType="fitEnd"
android:src="#drawable/pin2" />
</LinearLayout>
Just add the following line to your ImageButton and the extra background will fade away:
android:layout_gravity="center|clip_horizontal"
hope this works
Just ran into something like this and the other suggestions didn't help. What did help was setting the padding in the ImageButton:
android:padding="5dp"
Besides that, I didn't touch the original layout. The button became square on the 3 emulators that I tested (3.2, 4.4.2, 5.1)
I tried myself,it works
Simply do the Following...
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<EditText
android:id="#+id/editText1"
android:layout_width="0dp"
android:layout_weight="5"
android:layout_height="wrap_content"
android:inputType="text"/>
<ImageButton
android:id="#+id/imageButton"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent" />
</LinearLayout>
Use Layout Weight ratio 5:1 inside a LinearLayout for EditText and ImageButton
You Can resize the Image button using px... like below...
`android:layout_width="5px"
android:layout_height="5px"`
Related
I have a TextView and ImageView in a ListView row, positioned next to each other. However, the ImageView doesn't show up at all, and doesn't register clicks either. This is the XML code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView"
android:text="text"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_centerVertical="true"
android:padding="10dp" />
<ImageView
android:id="#+id/imageView"
android:clickable="true"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_centerVertical="true"
android:layout_toRightOf="#id/textView"
android:src="#drawable/ic_action"/>
</RelativeLayout>
The problem seems to lie in the layout_toRightOf line, if I remove it, the ImageView is shown, but in the wrong place. But I don't understand why it's causing a problem. What am I missing?
The issue is that the TextView is pushing the ImageView off the screen.
You can fix this using a LinearLayout and android:layout_weight
eg:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView"
android:text="text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginTop="10dp"
android:layout_centerVertical="true"
android:padding="10dp" />
<ImageView
android:id="#+id/imageView"
android:clickable="true"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_centerVertical="true"
android:layout_toRightOf="#id/textView"
android:src="#drawable/ic_action"/>
</LinearLayout>
More info on the layout_weight attribute:
This attribute assigns an "importance" value to a view in terms of how much space it should occupy on the screen. A larger weight value allows it to expand to fill any remaining space in the parent view. Child views can specify a weight value, and then any remaining space in the view group is assigned to children in the proportion of their declared weight. Default weight is zero.
For example, if there are three text fields and two of them declare a weight of 1, while the other is given no weight, the third text field without weight will not grow and will only occupy the area required by its content. The other two will expand equally to fill the space remaining after all three fields are measured. If the third field is then given a weight of 2 (instead of 0), then it is now declared more important than both the others, so it gets half the total remaining space, while the first two share the rest equally.
You need to use LinearLayout with weight.. if you set fixed width and the size of the phone is small, it will either stretch out of the screen.
//do linearlayout with orientation horizontal
<LinearLayout
...
orientation = "horizontal"
...
>
<TextView
....
android:layout_width="0dp"
android:layout_weight="1"
...
/>
<Button
....
android:layout_width="wrap_content"
...
/>
</LinearLayout>
Play with android:layout_weight, you will understand
In my activity xml file i am get an extra 8dp margin in Left side in view(Represented as Underline).
Reason for getting 8dp margin extra in "view"? (underline under TextView.)
i have given 48dp left margin in that view.
above that view i have
<TextView> which has a drawable icon in left.
with left margin 24dp and drawable padding 24dp.
Reason for doing.
I am try to create an underline under my words using a view with black background.
i have given 48dp as left margin in xml.but as shown in photo i am getting 56dp.
difference between lines is 8dp.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#FAFAFA"
android:orientation="vertical"
tools:context="com.hysterics.delhishop.AccountSetting">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="32dp"
android:layout_marginTop="16dp"
android:gravity="center|left"
android:paddingLeft="16dp"
android:textAllCaps="true"
android:textStyle="bold"
android:text="#string/hello_user"
android:textColor="#color/primary_text"
android:textSize="15sp"/>
<TextView
android:id="#+id/user_account_information"
android:layout_width="match_parent"
android:layout_height="54dp"
android:layout_marginLeft="24dp"
android:drawableLeft="#drawable/ic_account_box_black_18dp"
android:drawablePadding="24dp"
android:gravity="center|left"
android:textAllCaps="true"
android:textStyle="bold"
android:text="#string/account_information"
android:textColor="#color/primary_text"
android:textSize="15sp"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="center"
android:layout_marginLeft="48dp"
android:background="#android:color/darker_gray"/>
<TextView
android:layout_width="match_parent"
android:layout_height="54dp"
android:layout_marginLeft="24dp"
android:drawableLeft="#drawable/ic_home_black_18dp"
android:drawablePadding="24dp"
android:gravity="center|left"
android:textAllCaps="true"
android:textStyle="bold"
android:text="#string/account_address"
android:textColor="#color/primary_text"
android:textSize="15sp"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="center"
android:layout_marginLeft="48dp"
android:background="#android:color/darker_gray"/>
................
................
</LinearLayout>
</ScrollView>
here is my activity file.
public class AccountSetting extends AppCompatActivity {
public static final String TAG_USER_NAME_DIALOG = "edit_text_dialog";
#InjectView(R.id.account_setting_toolbar) Toolbar accountSettingToolbar;
#InjectView(R.id.user_account_information) TextView userAccountInformation;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_account_setting);
ButterKnife.inject(this);
setToolbar();
}
thank you in adavnce :-)
Because you set the underline view's layout_width="match_parent" and layout_gravity="center".
After views measure:
- the linear parent view's width is 1080px;
- the underline view's width is 936px ( because of layout_marginLeft="48dp"(144px))
When views layout:
- Because the linear parent's orientation is "vertical", so when set layout_gravity="center" equal with layout_gravity="center_horizontal".
- For a "center_horizontal" child, the linear parent will margin the child view's X-center with it's X-center
So the X-axis of underline view will be (in px):
540 (X-center of parent) + 144 (48dp margin left) - 468 (half of child's width) = 216px (72dp)
That why with layout_gravity="center", you will see the underline view will get 24dp extra margin.
You are adding drawable padding to the icon and the marginLeft is completely different between the underline and the icon. And also you have to take into account the size of the icon itself. I would be surprised that it would have the exact same align.
Instead of this, why don't you use an horizontal LinearLayout with weight between two linear layouts, one with the icon and another transparent view with the same height as the underline, and the other linear layout that contains text and underline perfectly aligned. No margins no nothing, just distribution of weight. Something like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:weightSum="10">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<View
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="8"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Account Information"
android:textSize="20sp" />
<View
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
This is just one possible solution that can guarantee you exact alignments.
It because your views width is match_parent & android:layout_marginLeft & android:layout_gravity="center"
is causing view to shift outside of screen bound.
See this for more information..
Try with removing center layout_gravity from your Views(which draws line)
android:layout_gravity="center"
and use
android:layout_marginLeft="#dimen/space_large"
instead of
android:layout_marginLeft="#dimen/space_xxlarge"
According these two lines:
android:drawableLeft="#drawable/ic_account_box_black_18dp"
android:drawablePadding="#dimen/space_large"
You'll have a drawable of width 18dp, then a padding of #dimen/space_large, which looks to be 24dp for a total of 42dp of padding between the left edge of the TextView and the start of the text itself.
However, the layout_marginLeft on your lines is #dimen/space_xxlarge or 48dp. As one is 42dp and the other is 48dp, they won't align. You'll need to change one or the other if you want the elements to appear visually in line.
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="center"
android:layout_marginLeft="48dp"
android:background="#android:color/darker_gray"/>
There are multiple view in your layout and you are using layout_gravity="center". So View is trying to adjust itself to center inside LinearLayout. Just try removing layout_gravity or use layout_gravity="left".
You have added marginLeft of 24dp also drawablePadding of 24dp and you say a total of 48dp But you forget the width of drawable icon. So, the first latter of ACCOUNT "A" is not at 48dp margin.
You are using LinearLayout and everyting is at the left side so there is no need of any gravity.
Also you say removing gravity from View makes it 36dp from left. YES, thats correct. You missed Drawable Icon width from your calculation.
Set layout_margin of View equals 48dp + width of icon. Thats the reason you got I think.
Just remove
android:layout_gravity="center"
from your view it will fix your problem.
I am trying to create a vertical linearlayout with weights that has a size bigger than the screen. Let's say 2x the size of the screen. In order for this to work I would obviously need to be able to scroll through it. Unfortunately I can't figure out a way to do this. I tried using the layout weights, and setting the weight sum as half of the actual sum of the weights of all components (so if all components weights sum is 20 I set the weight sum as 10) and managed to make it work but unfortunately the scrolling is not working anymore for some reason.
Is there anything that I am missing?
this is the code that makes the linearlayout twice as big as the screen but the scroll is not working:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fillViewport="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="2">
<EditText android:id="#+id/id1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:textSize="25dp"
android:gravity="center"
android:layout_weight="2"/>
<EditText android:id="#+id/id2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:textSize="25dp"
android:gravity="center"
android:layout_weight="2"/>
</LinearLayout>
</ScrollView>
Based on your comment, here is a programmatic way of achieving what you're looking for. I do not believe there is a way to accomplish this in pure layout XML.
Layout:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:background="#000000"
android:fillViewport="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:orientation="vertical" >
<EditText
android:id="#+id/id1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#DCDCDC"
android:gravity="center"
android:text="ONE ONE ONE"
android:textIsSelectable="false"
android:textSize="45sp" />
<EditText
android:id="#+id/id2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#AAAAAA"
android:gravity="center"
android:text="TWO TWO TWO"
android:textIsSelectable="false"
android:textSize="45sp" />
<EditText
android:id="#+id/id3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#777777"
android:gravity="center"
android:text="THREE THREE THREE"
android:textIsSelectable="false"
android:textSize="45sp" />
</LinearLayout>
</ScrollView>
Activity:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Get display size -- API L13 and up. Otherwise use getResources().getDisplayMetrics();
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
// You want size to be 50% per EditText, so divide available height by 2.
// Note: this is absolute height, does not take into consideration window decoration!
int editTextHeight = size.y / 2;
// Get a handle to your EditTexts
EditText t1 = (EditText) findViewById(R.id.id1);
EditText t2 = (EditText) findViewById(R.id.id2);
EditText t3 = (EditText) findViewById(R.id.id3);
// Set height to 50% of screen size each
t1.setHeight(editTextHeight);
t2.setHeight(editTextHeight);
t3.setHeight(editTextHeight);
}
That'll do it. End result:
You declared height of your LinearLayout "match_parent" that is equal to its parents height. It will never scroll as long as the content is bigger then ScrollView. First of all you have to give a fixed height like (50dp) or wrap_content or you have to set Its height programmatically(like 2x screen height as you mention).
weightSum and weight will always force your items to fit in your LinearLayouts current size so try not to use it.
I hope this helps.
The problem here is your use of layout_weight and weightSum is invalid. It's important to remember that android:layout_weight can only use the remaining space available in the view; anything exceeding that boundary is automatically cropped.
Therefore, in your example, your first EditText is taking up the entirety of the screen, and your second one is entirely excluded from the view. Because the second EditText is cropped, the LinearLayout has taken the entire screen and there's nothing for the ScrollView to do.
I'm not entirely sure what your end goal is; are you trying to have text inputs that grow with user entry, and the ScrollView handles the overflow?
If so, this will work:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:background="#000000"
android:fillViewport="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:orientation="vertical" >
<EditText
android:id="#+id/id1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#DCDCDC"
android:gravity="center"
android:text="ONE ONE ONE"
android:textIsSelectable="false"
android:textSize="45sp" />
<EditText
android:id="#+id/id2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#AAAAAA"
android:gravity="center"
android:text="TWO TWO TWO"
android:textIsSelectable="false"
android:textSize="45sp" />
</LinearLayout>
</ScrollView>
I've included some basic background colors so that you can see where each item begins & ends in layout preview. Typing in the first EditText will correctly push the second one down, producing a scroll bar.
Also note that you should use sp instead of dp for textSize values.
Edit: I should also note, for clarification, that weightSum will also take away space when necessary. To test this, set the weightSum of your LinearLayout to 2, and then add android:layout_weight="1" to each of the EditText controls. The end result will be a 50/50 split when the view loads, and then as you start typing in the first control, the 2nd space will shrink accordingly. Adding text to the second control will result in a scrollbar appearing.
I currently have a 2 column layout which looks like this:
<TextView android:id="#+id/TRAIN_CELL"
android:layout_width="275dip"
android:layout_height="wrap_content"
android:textSize="16sp"/>
<TextView android:id="#+id/TO_CELL"
android:layout_width="25dip"
android:textSize="20sp"
android:textStyle="bold"
android:gravity="center"
android:textColor="#color/light_best_blue"
android:layout_height="wrap_content"
android:layout_weight="1"/>
But with this approach I just hardcode the widths, and I am not sure what happens on wider on narrower screens. Is there a way to adjust this to use percentages of the width?
Thanks!
You can't specify width, or height using percentages, but there's something that is similar - weightSum and layout_weight. If you for example what your View to have width half of a screen, you have to do it like this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="horizontal"
android:weightSum="1.0">
<View
android:id="#+id/view"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:layout_width="0dip" />
</LinearLayout>
As you can see, the container of a View (LinearLayout) has set android:weightSum to 1.0 which means that 1.0 will be 100% of it's width/height. Then if you specify android:layout_weight for View inside this container to for example .5 and set it's width or height to 0dp (this part is very important as if you miss it, the View will use it's specified value instead of calculated one according to weights) it will receive 50% value of it's container's width/height.
android:layout_weight="1/2/3/4/5/..." will be your new friend ;-)
Do not forget to also use android:layout_width="0dip"
I am trying to arrange 4 buttons of equal sizes of the phone width in XML. I tried to use with relative layout with their relationship and width of buttons as "wrap_content". But the problem i faced with RelativeLayout is circular relationship is not allowed.
You can use android:layout_weight to make your button equal and fit them according to the width of the device screen. You can apply android:layout_weight="1" to all 4 buttons.
Use LinearLayout with android:weightSum="1.0" and assign android:layout_weight = "0.25" to each of your 4 button(weight_sum/no of buttons).
Under the Relative Layout you mention a Linear Layout whose
android:layout_width="fill_parent" android:layout_weight_sum="4"
android:layout_width="fill_parent" android:layout_weight="1" for all buttons and their parent layout
it works for me.
I think my answere also will be helpful though this is not directly related to above question.
I wanted to arrange 2 icons in the footer area of the application. here is what I did.
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" >
<ImageButton
android:id="#+id/back_arrow"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_weight=".5"
android:background="#android:color/transparent"
android:contentDescription="#string/Description"
android:onClick="onClickBtn"
android:layout_margin="35dp"
android:src="#drawable/backbut" />
<ImageButton
android:id="#+id/imageButton2"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:layout_margin="35dp"
android:background="#drawable/copy"
android:contentDescription="#string/Description"
android:onClick="onClickBtn" />
</LinearLayout>
since i wanted to give same width I have set android:layout_weight=".5" and I wanted to have a margin amoung two icons. therfore I set android:layout_margin="35dp".