Develop Reference

Android - how can i make a minimizable app?

So , i want to make an app that can i can minimize and move over other apps.
I saw this feature on the twitch app and did some research but didn't find how they did it.here is an example of this feature.
Thank you for your answers in advance.

The example you showed is Android's Picture-in-Picture feature: https://developer.android.com/guide/topics/ui/picture-in-picture
However, it's not exactly a minimized app. Picture-In-Picture mode is simply a way for your content to be shown when users switch to other apps.
Due to this, there's a number of restrictions and guidelines, such as you're encouraged to hide all UI elements when in PIP mode besides the content that is displayed.
You're allowed to provide a list of Actions for the user to interact with, such as media controls. But note that there's a limit to how many actions that can be provided.
So it's not exactly a minimized app in the sense that its a smaller version of your app. Instead, it's more like the main viewing content of your app has been plucked out of your app and it's displaying over other apps.
If that's all your app needs, then Picture-In-Picture mode will work well.
But if you want a real mini-version of your app, you're going to have to consider Floating Windows instead. Floating Apps create a UI through a Service instead of an Activity.

Display Application widget on Lock screen android

I am stuck with one of my client requirement , it seems not be feasible to me as i am not able to find anything related to this particular requirement.I am goggling but does not came up with proper clue.I though studied the below mentioned link which states that it is not supportive . Here is the link :-
How to force a widget to appear on lock screen programmatically (Android)
i just want to confirm that is it feasible ? Or this can be achieved by making custom lock screen for application.
Here is what my client requirement is :-
I need your suggestion here , please let me know .
Thanks

i just want to confirm that is it feasible ?
As I wrote in the answer to the question that you linked to, the standard Android lockscreen framework only supports app widgets from Android 4.1 through 4.4, which is a steadily shrinking portion of the Android device ecosystem.
Or this can be achieved by making custom lock screen for application.
Android does not support the creation of custom lockscreens, other than by building your own modified version of Android, poured into your own custom ROM, installed onto whatever hardware your custom ROM supports.
There are plenty of developers who claim to create custom lockscreens. Those actually require you to disable the device lockscreen, then their apps attempt to interpose themselves between the user and ordinary apps. At the best of times, this offers weaker security.

Lock Android Device to Run Only One App

I was wondering if anyone had a relatively simple solution for us.
We created an app to be used by our clients on android devices that we give them.
We would like the client to only be able to use our app and have limited access to everything else (i.e. settings, email etc.) What is the best way to achieve this without using 3rd party apps.
Thank you in advance!

This may not help but the L preview has a task locking feature included that may be of some insight, I'm not aware of how it functions as yet
Task locking
The L Developer Preview introduces a new task locking API that lets you temporarily restrict users from leaving your app or being interrupted by notifications. This could be used, for example, if you are developing an education app to support high stakes assessment requirements on Android. Once your app activates this mode, users will not be able to see notifications, access other apps, or return to the Home screen, until your app exits the mode.
http://developer.android.com/preview/api-overview.html
Hope this helped

Suppress the Title Bar & Make Your App a Launcher
Root Your Tablet
Modify System Files and Settings to hide the soft keys
On the next link you can find the complete solution for the Nexus 7 (2012)
http://thebitplague.wordpress.com/2013/04/05/kiosk-mode-on-the-nexus-7/

simple Answer is:
Lock Install button with modify system settings.
Create your own customized-ROM and apply your requirement to that ROM.
more info, visit XDADavelopers

Operating system level security Android

I have a requirement for trying to develop an alternative to the current pin password security system on the android operating system. The main goal will be to try and replace the current password system with an alternative that uses one of the hardware features on the device. Is this possible as a third party? Or, would you need to go to the specific head set manufacturer to get the ability to circumvent or change the current security system?

I believe there is no API which is specifically designed to replace/be a pluging to a lock screen on Android.
However, people found several clever way of implementing it:
Replace home screen
Showing activity on top of lock screen
Take a look at these questions:
Where can I find examples or tutorials about creating a custom android lockscreen?
Customizing Android Lock Screen functionality?

Webapp based Android keyboard

I am programming an Android keyboard. Right now I reached the point where I have to rewrite the KeyboardView and I'm asking myself why not to switch to an Webapp instead of a native Android app. Thereby I could later easily deploy the application for other platforms whithout the need of rewriting.
My approach would be to use the Android App as an container for my web app probaply in combination with GWT. I am also considering using PhoneGap.
The problem is that so far I haven't found anything about people using webapps for an InputMethod. Now I'm wondering if it's reasonable or even possible to use webapps for this task or if they are only suitable for normal activities.
Has anyone tried doing this before or some hints why or why not it is possible?