How do I center the text horizontally and vertically for a TextView in Android?
How do I center the alignment of a TextView?
In Linear Layouts use
android:layout_gravity="center"
In Relative Layouts
android:layout_centerInParent="true"
Above Code will center the textView in layout
To center the text in TextView
android:textAlignment="center"
android:gravity="center"
add this property for textview in xml
textview<android:height="yourheight"
android:width="yourwidth"
android:gravity="center">
your width size should be less than the parent container's width size
It depends on how you have declared the height and width. If you used wrap_content, then the textview is just big enough in that direction to hold the text, so the gravity attribute will not apply. android:gravity affects the location of the text Within the space allocated for the textview. layout_xx attributes affect the location of the view within it's parent.
SO if you set the size of the textview, then use gravity to position the text within the textview area, if you used wrap_content, then use the layout_xx attributes to position the textview within it's parent
Related
If I try to center the current view vertically within its parent. Which one should I use?
I saw TextViews use gravity="center_vertical" and ImageViews uselayout_centerVertical="true".
I am not sure why?
In textview , gravity="center_vertical" means the content in the textview will be center and vertical . you can only see the alignment of text if textview is fill_parent if its wrap_content then there will be no place for content to have alignment.If you use layout_gravity here and width and height to wrap_content then it will place the textview in the center _vertical of the parent layout.
In imageview ,layout_centerVertical="true". means place iamge and in center and vertical in the parent layout of image (i.e the container of image).
I'd like to use the center of a View to align it in another View, let's say, a TextView in a RelativeLayout.
I don't want to have it centered inside the RelativeLayout but rather offset from the bottom left corner.
At the moment I align the TextView ParentLeft and ParentBottom and use margins on left and bottom to move it away from those sides.
However, because my TextView is set to wrap_content in width, it "moves" around when the text inside and with it its width changes (since the borders of the TextView are used for the offsets).
I want the center of the TextView to stay on my offsetted position.
Is this possible in the xml, without having to write code that manages the offset or to use another layout?
That's the unwanted behaviour when the text changes: Screen1
The desirable behaviour: Screen2
Note that the center of the TextView stays the same.
There is a simple logic here. If you want to align a view with respect to the parent then for relative layout you can use align_parent wherein in linear use android:layout_gravity. Here in you case make textview as match_parent and set gravity to centre.
I have a relative layout. For simplicity, there is an ImageView, EditText, and Button:
The ImageView is a banner with a fixed height
Below that is and the EditText where android:layout_width="fill_parent"
Below that is a Button with a fixed width and height
The problem is I want the editText to fill the leftover height of the screen. put and image on the top, a button on the bottom, and in the middle and edit text that takes up the rest of the space.
What property would i have to work with to get something similar to this?
For this purpose, there is LinearLayout with layout_weight property. Use LinearLayout for holding these 3 elements. For Button and ImageView, set layout_height as wrap_content. For EditText set layout_height="0dp" and layout_weight="1".
Have you considered using Relative Layout?
You could use
android:layout_below
android:layout_alignParentTop
android:layout_alignParentBottom
android:layout_marginTop
android:layout_marginBottom
Try that and post some sample code if you get stuck.
I am trying to design a screen and unable to appreciate the difference between android:layout_gravity and android:padding, if both align the view based on parent layout, then how different are they from each other. Please advise. Thanks.
Padding (see the "Size, Padding and Margins" heading in that link) creates an absolute distance (usually in pixels) between the edge of a view and it's content.
Gravity positions an item relative to it's parent: in the center, to the left, to the right, top, bottom, etc. but you cannot supply an absolute distance from an edge, e.g. 10 pixels, without using margin (or padding; read the Android docs for information on the difference between those two).
I like to think of padding as a box inside the layout where your contents will be placed (alignment baed on the gravity). Where as, without any padding, gravity will change the alignment of the contents with respect to the layout border.
android:padding is setting the absolute padding values within the current layout. android:layout_gravity set the gravity of the current layout with respect to the parent.
<Linearlayout android:id="#+id/L1">
<Linearlayout android:id="#+id/L2"
...
android:layout_gravity="bottom|left"
android:padding="5px">
<TextView android:id="#+id/T1"
.../>
</Linearlayout>
Hence L2 is aligned to the left bottom corner of L1 and android:padding sets a padding of 5px on each of the four sides for the layout L2 (which affects the childlayouts of L2 = T1).
To simulate a grid, I have a tablelayout with background #ffffff, tablerow with background #000000 and textviews with background #dcdcdc.
The entire cell is colored #dcdcdc when the textview has width and height set in fill_parent, but when I add the attribute layout_gravity=center, the width fill_parent attribute is discarded. How can I center the text keeping the whole cell with the expected color?
If i understand correctly...you can use
android:gravity="center"
on the TextView to center the text in the view.