Android: Detect softkeyboard open

Here is my solution:

1/ A simple interface

public interface KeyboardVisibilityListener {
    void onKeyboardVisibilityChanged(boolean keyboardVisible);
}

2/ A utility method (put it where you want, for instance in a class named KeyboardUtil)

public static void setKeyboardVisibilityListener(Activity activity, KeyboardVisibilityListener keyboardVisibilityListener) {
    View contentView = activity.findViewById(android.R.id.content);
    contentView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        private int mPreviousHeight;

        @Override
        public void onGlobalLayout() {
            int newHeight = contentView.getHeight();
            if (mPreviousHeight != 0) {
                if (mPreviousHeight > newHeight) {
                    // Height decreased: keyboard was shown
                    keyboardVisibilityListener.onKeyboardVisibilityChanged(true);
                } else if (mPreviousHeight < newHeight) {
                    // Height increased: keyboard was hidden
                    keyboardVisibilityListener.onKeyboardVisibilityChanged(false);
                } else {
                    // No change
                }
            }
            mPreviousHeight = newHeight;
        }
    });
}

3/ Use from an Activity this way (a good place is in onCreate):

KeyboardUtil.setKeyboardVisibilityListener(this, mKeyboardVisibilityListener);

Per this post and this post on android-developers it doesn't seem like it's possible to do what you want. You may want to re-examine your use case for what you're doing. Maybe one of the softInputMode flags will work for you.

watching the date , possibly you have a solution for your question, otherwise:

Here is the same response i made to another question related : Is there a way to tell if the soft-keyboard is shown?

but i copy full response here to avoid dead links:

Please check Configuration Changes for your Activity

This for your AndroidManifest.xml

and this for your Activity class http://developer.android.com/reference/android/app/Activity.html#onConfigurationChanged(android.content.res.Configuration)

You will need to @Override the public method onConfigurationChanged(android.content.res.Configuration) of your Activity to be able to handle, for example, this values:
hardKeyboardHidden,
keyboard,
keyboardHidden

For all possible values check http://developer.android.com/reference/android/content/res/Configuration.html

You will see there something like this:

HARDKEYBOARDHIDDEN_NO   
HARDKEYBOARDHIDDEN_UNDEFINED    
HARDKEYBOARDHIDDEN_YES  
KEYBOARDHIDDEN_NO   
KEYBOARDHIDDEN_UNDEFINED    
KEYBOARDHIDDEN_YES  
KEYBOARD_12KEY  
KEYBOARD_NOKEYS 
KEYBOARD_QWERTY 
KEYBOARD_UNDEFINED

Also there you will be able to read something like this:

public int  hardKeyboardHidden  A flag indicating whether the hard keyboard has been      hidden.
public int  keyboard    The kind of keyboard attached to the device.
public int  keyboardHidden  A flag indicating whether any keyboard is available.

UPDATE:

Here is a specific sample of what i´m talking about:

http://developer.android.com/guide/topics/resources/runtime-changes.html

    
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    // Checks the orientation of the screen
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
        Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
    }
    // Checks whether a hardware keyboard is available
    if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
        Toast.makeText(this, "keyboard visible", Toast.LENGTH_SHORT).show();
    } else if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES) {
        Toast.makeText(this, "keyboard hidden", Toast.LENGTH_SHORT).show();
    }
}

I hope this help you

The only way I was able to work around this is by setting my activity's android:windowSoftInputMode="adjustResize" and then embed a custom "detector view" in the layout to handle a container size change and propagate that as a custom event (via a Listener) for soft keyboard on/off.

The following post describes an approach to implementing it: EditText does not trigger changes when back is pressed