How can I have two images stay on top of each other.
In other words, the position of image 1 is exactly the same as the position of the second image; one image is covering the other completely?
Use a FrameLayout and then put your two ImageViews inside it. Children of a FrameLayout stack on top of each vertically.
I think RelativeLayout is what you are looking for.
You should take a look at FrameLayout. Adroid have an example of using FrameLayout. Read up on this good example, and you'll have a better idea of how to tackle your problem.
Related
I searched for a few hours over the internet but I didn't find any example or documentation explaining how to create an horizontal list view with fixed number of elements.
Basically, I would like to have, let's say 3 elements out of n(total number of elements) which are displayed on the screen without taking into consideration the size of the scree. The elements can be bigger or smaller proportionate to the screen but the number of visible elements should be the same, fixed. see the image.
How can I do that? Any hint is appreciated! Thank you!
You can use TwoWayWiew third party library (i dont really recommend this solution), or if you want to avoid to use lib for this, just use RecyclerView, and you can set HORIZONTAL param to layout manager.
I would not use a ListView for this, but a RecyclerView instead. Performance is better in a RecyclerView and I honestly find them easier to work with. You can allow for horizonatal scrolling via the LayoutManager for your RecyclerView.
If don't mind scrolling horizontally by 3 items you could use a ViewPager with each View containing a LinearLayout (orientation horizontal) with three of your elements that have a
android:layout_width="0dp" and an
andriod:layout_weight="1"
for even distribution.
When you "scroll" you would just animate the next "page" into the screen bringing in the next 3 elements.
This might not be the most elegant solution but I think it would behave the way you want.
use the linear layout with its orientation set as horizontal under the relative layout
OK first I'm not actually moving buttons I'm moving imageviews that have an onclick listener. What I want to do is drag multiple imageviews around inside a layout. I was going to use a FrameLayout but it seems that wont work for multiple items.
Can anyone tell me which layout is suitable for this?
thanks in advance
Linearlayout with a vertical orientation should do it for you..use margain_direction for fine tuning it further
Maybe a GridLayout would suit your needs? You can have one or multiple child views in each grid cell.
What purpose does FrameLayout serve in Android? Is there any specific scenario for which it is designed for?
In my Android application, I have a scenario where I have to show two ImageViews, one over the other. This is a .png image file with a 9-patch drawable over this image.
Which ViewGroup should I use for this purpose: RelativeLayout or FrameLayout?
I also want to know the different scenarios that each of the ViewGroups should be used for.
I don't recall how i got to this question but here is my answer that could help anyone:
As you can see here
FrameLayout is designed to block out an area on the screen to display a single item. Generally, FrameLayout should be used to hold a single child view, because it can be difficult to organize child views in a way that's scalable to different screen sizes without the children overlapping each other.
In general is not useful to have 2 views one over the other because you're going to have overdraw effect (an area of the screen that is getting drawn by the gpu more than once which is really useless).
If you really have to, then you need to use the onDraw method (you can see an example here) and Canvas API (have a look here) and the clipRect method (you can see an example here)
Regarding FrameLayout or RelativeLayout, if you want to keep things simple or your activity has already enough nested layouts, better use FrameLayout. In 2017, there is the constraint layout which could be of some help as well.
Yes, you can use a FrameLayout in your scenario.
I was looking into laying out some instructions on top of one of my applications like SoundHound does in one of their latest updates: http://i.imgur.com/D36nL.png
How is something like this achieved? Is this some sort of layout over another layout? Or a "dialog box" in a way?
You can create a frame layout with two children. The first would be the standard layout for the activity. The second would contain image views that display the help bubbles in the appropriate locations.
For more information see this: http://developer.android.com/guide/topics/ui/layout-objects.html#framelayout
Here is nice simple example: http://www.learn-android.com/2010/01/05/android-layout-tutorial/3/
You could just use a RelativeLayout with some elements having negative margins. They will overlap over other elements.
Im new to Android and over the past few days I have been over many tutorials, I was wondering if you could help me with some advice.
I want images on top of each (not completely, there may be some overlapping) other with each image to be clickable.
Whats the best way to do this? Have each image in an image view? Can these be positioned on top of each other? And have onclick listeners?
Thanks for your help
Imageviews can be stacked by using the framelayout. The framelayout add each child view on top of each other based on the order of the childs ie the last child will be the top most.
Jep, ImageViews are appropriate. Add them to a RelativeLayout and add a onClickListener and you are done.
Have a close look at RelativeLayout's align* attributes.
HTH.