I am developing an android widget to show in the homescreen. Now, I can show the widget in main homescreen. Now, is there any way to show that widget every homescreens (in most of the devices there are several homescreens where we can swipe to left or right from the homescreen)?
Only if the user manually adds your app widget multiple times.
These depends on entirely on the home screen app. Some home screen apps could certainly implement a UI to have a widget like this. The launcher that is part of stock Android does not have such a facility.
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I am trying to create an Android app where there will be simple animations on the phone at all times.
The app will be similar to "Crack Your Screen Prank"
or
Facebook Messenger,
where it will be on top of the home screen, but animated.
At first I thought this was widget but I am not sure anymore.
Please let me know how to achieve this.
This can be done in three ways:
A Widget
A Live Wallpaper
A Daydream
Its even possible to create an app that has all three of these features and offers the user the option of using one or more of them simultaneously.
Is there any way to retrieve position/location of android widget which is activated in android device, like whether its on lock screen, home screen etc. In lock screen is it the main widget displayed.
On Android 2.1 and later, with some select home screens, you can find out where an app widget resides when it is clicked via getSourceBounds() -- this value is attached to any Intent you spawn via a PendingIntent via setOnClickPendingIntent().
However:
this only works on Android 2.1 and newer
not all home screens might do this, as this is part of the Launcher code IIRC
the coordinates are in pixels IIRC
there is no way to interrogate the home screen to find out this information any other way, since there is no API to interact with the home screen
Hence, I think your stated goal ("Depending on whether it's on the top of the desktop or at the bottom different layouts for the widget will be chosen") is impossible, I think.
I'm afraid I've never owned an android device and only have the emulator to work with.
I am building a widget (>= API 14) and would like to test it on the homescreen. However, I have no idea how to actually create my widget! A long press on the homescreen just shows the "Select wallpaper from" popup.
I can see it in the list when I use the Widget preview app but as part of my testing I want to test real functionality. How do I get the widget to appear on the homescreen?
How do I get the widget to appear on the homescreen?
Open your launcher. Keep swiping right-to-left to get to the app widgets. Long-press on an app widget to add it to the home screen.
Is there a way of creating a Car Home shortcut that acts like a app widget where I can send dynamic updates like an app widget?
For example, a car home shortcut that displays the current speed.
No. It is not possible to dynamically update the shortcut icon for an app.
You'd have to make a custom widget that looks like an app icon. This would be very difficult, as there are many different Android launchers out there (e.g. HTC Sense, Samsung TouchWiz).
See Android Home Screen Widget (icon, label - style) for more about this process.
I need a screen control (possibly but not mandatory an app widget) that will seat
on Android's homescreen and will always be visible to the user - even when he scrolls the homescreen to the next page.
Please help me if any body have done this before.
I think the only way you will be able to do this is if you implement your own Launcher.
The functionality that you're looking for, being able to place a static widget on every screen of the launcher regardless of how many screens they have, isn't currently available in Android, nor any of the launcher apps out there (Go launcher, ADW, Launcher pro etc) nor any of the versions of Android which have been rewritten by the phone manufacturers (HTC's Sense, Samsungs Touch Wiz etc)
It's a big job to write a Launcher yourself, but the stock Android Launcher code is available to play about with from https://android.googlesource.com.