Develop Reference

Android soft keyboard is not changing programmatically

I am trying to change the android default keyboard to another soft keyboard that has already installed.
for achieving this task I tried this code,
imeManager.setInputMethod(txtSearch.getWindowToken(),
"lk.bhasha.helakuru/.SinhalaSoftKeyboard");
but the keyboard is not changing.
How do I switch the android soft keyboard to another already installed?
Thanks.

For security reasons, it's not possible to change the keyboard programmatically, unless your application is an IME.
From the documentation:
A client application can ask that the system let the user pick a new IME, but can not programmatically switch to one itself. This avoids malicious applications from switching the user to their own IME, which remains running when the user navigates away to another application. An IME, on the other hand, is allowed to programmatically switch the system to another IME, since it already has full control of user input.

Using both soft keyboard and physical keyboard in Android app

is there a way to force soft keyboard in Android 4.4 app?
I'm developing an app which needs both software keyboard and bluetooth barcode reader. Barcode reader will be used in 99% of cases, but there are some options which require soft keyboard (e.g. typing e-mail address or password).
When barcode reader is paired with the phone, soft keyboard doesn't appear. I'd like to keep it that way, but when user enters a selected view soft keyboard should appear.
Thanks in advance!

Controlling the input language keyboard programatically from the android app.

The problem is that when I change the language of my android device to Hindi, it changes the keyboard to Hindi as well.But I want that the app should appear in Hindi but English keyboard should always open inside the app.I want that it should be done programatically through the app instead of changing the devive settings.

No you cannot. Android has restricted this for security reasons. If you can manipulate the input method, you can do things like key logging, hence tampering privacy. You could however use the InputManager and let the user select an input method:
InputMethodManager ime=(InputMethodManager)getActivity().getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
if(ime!=null) {
ime.showInputMethodPicker();
}
But the above code will only show the active keyboard set the user in Settings.

Per-application input setting on Android Device

Android keyboard has a button that switches the input language. How can I change the input language
programmatically without using this button? My app has different textboxes where the user enters information in different languages and when the user switches from one field to another the input language will be changed automatically to the correct one.
Android keyboard is a stand-alone application, so I need to manage this language changing from my application. The only thing that I found is switchToNextInputMethod() method in InputMethodManager class but I'm not sure if it fits.

Is there a way in Android to tell if a users device has an actual keyboard or not?

I would like to detect if the current users phone has a hardware keyboard or only a on-screen keyboard. Is this possible with the SDK?

Yes, you can.
Fetch the Configuration object using
Configuration config = getResources().getConfiguration();
...and then look at the keyboard field.
If they value of keyboard is not KEYBOARD_NOKEYS, the user has a hardware keyboard.
Note that as #Carl says in his comment below, the user may attach a USB keyboard at any point while your app is running, causing the value of keyboard to change.