<activity
        android:name=".activity.MyActivity"
        android:windowSoftInputMode="adjustResize|stateHidden"
        android:screenOrientation="portrait" />
<activity

public class SoftKeyboardUtil {
    public static void observeSoftKeyboard(Activity activity, View rootView,final OnSoftKeyboardChangeListener listener) {

        if(rootView==null){
            rootView = activity.getWindow().getDecorView();
        }
        final View decorView = rootView;
        final ViewTreeObserver.OnGlobalLayoutListener globalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
            int previousKeyboardHeight = -1;
            @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
            @Override
            public void onGlobalLayout() {
                Rect rect = new Rect();
                decorView.getWindowVisibleDisplayFrame(rect);
                int displayHeight = rect.bottom - rect.top;
                int height = decorView.getHeight();
                int keyboardHeight = height - displayHeight;
                if (previousKeyboardHeight != keyboardHeight) {
                    boolean hide = (double) displayHeight / height > 0.8;
                    listener.onSoftKeyBoardChange(keyboardHeight, !hide);
                }

                previousKeyboardHeight = height;

            }
        };
        decorView.getViewTreeObserver().addOnGlobalLayoutListener(globalLayoutListener);
    }

    public interface OnSoftKeyboardChangeListener {
        void onSoftKeyBoardChange(int softKeybardHeight, boolean visible);
    }
}