Is there any way to change android:windowSoftInputMode value from java class?

Use the following to change the softInputMode for an Activity.

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);

Use the following to change the softInput type for an EditText.

mEditText.setImeOptions(EditorInfo.IME_ACTION_DONE);

Thanks to @Eliezer for correction

According to Prasham's comment, I did this and it saved my life, thanks to him! The EditText and SoftWindowInput mode are quite buggy when you have a layout with ScrollView and you are filling it dynamically.

Since I had gone through this post but had continued to read other answers/comments (like Prashan's one), I decided to write it in a new post.

Below the code I used with my ScrollView:

Activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);

I aim to use two different modes for tabs. The modes are SOFT_INPUT_ADJUST_RESIZE and SOFT_INPUT_ADJUST_NOTHING.

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

The code line above simply doesn't work by itself. App always behaves in a state ADJUST_NOTHING. However, if windowSoftInputMode="adjustResize" is inserted into <activity> tag in AndroidManifest.xml file, app window is resized as default. Additionally, when you call following line

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);

it will behave as expected and nothing is resized.

P.S. improvement to the answer