When making a website with html and css you can simply make a box by giving a couple of div tags some attributes like color and such, what is the Android xml equivalent to this? I need to make a layout with simple elements like this example, whether it be just a rectangle or a circle, that can rescale with the screen. Is there a way to do that? Even a link to a tutorial would be greatly appreciated, i could not find anything myself.
what is the Android xml equivalent to this?
To the extent that there is an equivalent, you could use a a ShapeDrawable, used in an ImageView or possibly as a background to something else.
Please understand that not everything that is easy in Web development will be easy in other platforms, and not everything that is difficult in Web development will be difficult in other platforms.
You can use View and give it a background.
If you want a rectangle, you can just assign the color you want:
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000" />
If you want to have a circle as background, or something other, you can create a drawable file using shapes:
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="#000000" />
</shape>
and assigning it to the view:
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/circle" />
where "circle" is the name of the file with the shape
The Fastest way to make custom buttons and any kind of background.
Oval, Rectangle etc.
In your case as i am getting is that you want an rectangle like we do in HTML/CSS.
Here is an video with very much clarity, i found :
https://www.youtube.com/watch?v=WkJTunLf5iE
In this video he described about custom buttons but you can use it same with your required background and set it to you view like this :
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/rectangle" />
That's it !!
Related
I am trying to set a border for few of the image buttons for a particular screen layout in android. But for some buttons, I want to disable the border if the screen-layout background is blue colour. Please help me how to do this?
(I assume you design your app with Material Theme)
I think you can't do it (maybe possible with some hacky technique), because it's not intended to be that way.
Google has designed each view to underline each of their own purposes. So, I believe, If you can modify a button that way, it won't felt like a button to users thus can raise some misunderstanding.
What possibly user think if such button that doesn't have default blue, exist? Do they still think that as a Button?
Personally, I suggest that you leave the border as-is, if you still intended to make it feels like a Button.
Otherwise, if you really need it, you can always use CardView, put an ImageView inside it and attach OnClickListener to it. I think the result is quite similar because almost every rectangular view Google has nowadays, got similar visual to CardView.
Btw, I made this in my recent project to achieve a borderless Button-ey Image. Maybe it'll help.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
card_view:cardElevation="4dp"
card_view:cardUseCompatPadding="true"
card_view:contentPadding="0dp">
<ImageView
android:id="#+id/clickable_photo_thumbnail_image_view"
android:layout_width="#dimen/photo_thumbnail_size"
android:layout_height="#dimen/photo_thumbnail_size"
android:adjustViewBounds="true"
android:scaleType="centerCrop" />
</android.support.v7.widget.CardView>
(UPDATE) This is the screenshot from my app, produced with above code:
(In my screenshot, I already use a RecyclerView)
Ok, so I'm working on a very simple Android homescreen widget that fetches the latest Image from an imageboard and displays it in a imageview.
I'd like to have the option to Style this widget, to be in keeping with Googles Material design guidelines, however, I hit the following problem whilst developing and testing on my Nexus 5 running Lollipop 5.1 -
I can't seem to use a cardview in a widget. It gives me a class not found exception however I do not get such exceptions previewing the layout and my gradle has the right dependancies so I suspect it is more to do with widget compatibility?
So I did some further reading and on the Google API page about widgets it has a very specific list of views that widgets support, which did not, to my surprise include cardviews. So I've gone back to my plain old Imageview
I guess my question then sits with, how would I get this imageview to look like a material design card? EG, rounded corners, the subtle 3d effect, drop shadow, ETC. I do not wish to give the imageview a border, the edge of the image should extend to the edges and get clipped by the rounded corners.
I have tried by simply setting the style of the Imageview to be that of a cardview, but that seems to have done absolutely nada :)
Anyone has some ideas? Thank you!
you might want to have a look at the source of the google i/o app : https://github.com/google/iosched/blob/master/android/src/main/res/layout/widget.xml
This is from a long time ago, but it's very doable to make a simple card background in XML.
The way to do this is to create an cardview-esque .xml file in your drawables app resources folder.
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#color/white" />
<corners android:radius="4dp" />
</shape>
and set the background view of your Widget's XML layout as
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/widget_card_background"
android:orientation="vertical">
<.../>
</LinearLayout>
You are correct in that CardView is not an available View type for Android Widgets, but this should create the functionality you were looking for 2 years ago
I'm trying to set a background via a XML file that has to contain various shapes, I don't whant them to overlap (i've already played with that) but I want them to be one below the other.
I already have a layer-list defined in one xml, and now I want to have a shape under that one.
How do I accomplish that using only xml?
Thanks, I've been looking arround but all I find it's information about layer-list and not this particular situation. I'm sure there's a post about it arround here, but I can't seem to find it. Sorry in advance.
PD: Since I'm asking, any way to accomplish a blur effect on a shape?
Edit: Another way to ask the same question: I have a rectangle.xml and a circle.xml, how to I put one below the other for it to be used in a background.
There are two obvious options here:
Split the layers out into separate drawables and assign them to different views in e.g. a vertically orientation LinearLayout.
Specify an appropriate value for the android:top attribute to offset the second (and 3rd an 4th etc) drawable.
Example for 1:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/drawable1" />
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/drawable2" />
</LinearLayout>
If your current LayerDrawable depicts some sort of state, you may also want to look into StateListDrawable or LevelListDrawable.
Example for 2:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/drawable1" />
<item android:drawable="#drawable/drawable1" android:top="50dp" />
</layer-list>
The second option requires some a priori knowledge about the size of the first item. If you define the drawable using xml, you'll have to set the at appropriate offset value at design time.
Can someone please guide me how exactly can i create a circular buttons and textview in android apps, I am still a new into android development. Please help
You cannot create a real circular view (button or textview) in android - all views are rectangular. That said, you can imitate the look of a circular button by giving it a circular background. There are several ways of doing this. One simple way would be to create a PNG image of a circle, save it in your drawable folder and then set it as a background for your button:
<Button android:background="#drawable/circle_bg" .../>
Another way would be to use custom shapes to draw a circle:
<shape android:shape="oval" ...>
<solid android:color="#FFFFFF"/>
</shape>
Save that as an XML file in your drawable as circle.xml and then reference it in your layout:
<Button android:layout_width="40dp" layout_height="40dp"
android:background="#drawable/circle" ... />
This will create a circular button with 20dp radius.
Of course, you may want to combine this with state selectors to get the highlighted states on touch or focus.
There are loads of examples on the internet. Just search.
As some1 mentioned, to make your custom buttons you've to define Styles:
Custom circle button
About TextView: What do you want to do? Change font? Change colour? Change Size?
You've XML attributes for TextViews if you're doing this by XML. Except to change font, that it was implemented in 4.1.
android:text="TextView"
android:textColor="#288BA2"
android:textSize="30sp"
Is it possible to add an image(view) on top of a button (which as a background image)?
I'm porting an iOS app to Android and it wasn't a problem on iOS, but I'm wondering if it is the right approach on Android because of layouts.
Edit :
To clarify, check this screen shot :
http://a4.mzstatic.com/us/r1000/062/Purple/v4/7c/4b/cd/7c4bcd53-ba55-94d7-a26c-ce1bfe040003/mza_2736801523527387264.320x480-75.jpg
I need to do the bottom left button "carte" (card in french)
I need :
a button with a background image
an image displayed on top of the button which is loaded from internet (a card , there is a lot of different and news cards are added daily, in the screnshot it s "MIDI PASS" )
a text localised on the button , so I cant use Imagebutton class.
It is not quite clear what you want to achieve, but the following may be helpful for you:
Use an ImageButton
Set the Image as the background of the button either in XML (using android:background) or in code (using setBackgroundResource)
Update:
Looking at your updated requirements, it would be better to use a custom component to achieve what you want.
Your question is somewhat unclear but from what i understood, following may work for you:
<ImageButton android:id="#+id/imgButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/bg_image"
android:src="#drawable/top_image"/>
Hope it will be helpful.
UPDATE:
If Your background is common, then you can set the bitmap using following code:
((ImageButton)findViewById(R.id.imgButton)).setImageBitmap(bmp);
Here, you will need to get the bitmap of the card image in bmp variable.
You can also use an ImageView and implement the onClickListener.
Yes it is possible.
Use an ImageButton then....
set your android:src="#drawable/foreground Image"
set your android:background="#drawable/background Image"
So if you wanted a an apple for the background image and a 3-d word "apple" for your foreground image.
You could try something like this:
First, you create a selector for the button in the res/drawable/ folder (let's call it selector_button.xml):
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/image_resource_for_button_pressed"
android:state_pressed="true" />
<item android:drawable="#drawable/image_resource_for_button_pressed"
android:state_focused="true" />
<item android:drawable="#drawable/image_resource_for_button_normal" />
</selector>
Here you can define as and android:drawable not just #drawable's, but #color's or #layout's, too. If you want a more complex layout, you should define one with the background image of the button and another image on top of it using a RelativeLayout for example.
In order to do this, you have to have image_resource_for_button_pressed.png (for pressed and focused state) and image_resource_for_button_normal.png (for normal state) in your res/drawable/ folder.
After that, you create a button, like this:
<Button
android:id="#+id/aButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/selector_button"
android:text="Hardcoded string" />
This approach helps you maintain code readability, since you just extracted the changing of the image resource into an .xml file.