Textbox hidden below keyboard in Android webview

This would work:

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

For activities in full screen mode, android:windowSoftInputMode="adjustResize" will not work.

https://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_FULLSCREEN

A fullscreen window will ignore a value of SOFT_INPUT_ADJUST_RESIZE for the window's softInputMode field; the window will stay fullscreen and will not resize.

I use the following method in the activity to resize the layout by setting a bottom padding:

    public void adjustResizeOnGlobalLayout(@IdRes final int viewGroupId, final WebView webView) {
        final View decorView = getWindow().getDecorView();
        final ViewGroup viewGroup = (ViewGroup) findViewById(viewGroupId);

        decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
                Rect rect = new Rect();
                decorView.getWindowVisibleDisplayFrame(rect);
                int paddingBottom = displayMetrics.heightPixels - rect.bottom;

                if (viewGroup.getPaddingBottom() != paddingBottom) {
                    // showing/hiding the soft keyboard
                    viewGroup.setPadding(viewGroup.getPaddingLeft(), viewGroup.getPaddingTop(), viewGroup.getPaddingRight(), paddingBottom);
                } else {
                    // soft keyboard shown/hidden and padding changed
                    if (paddingBottom != 0) {
                        // soft keyboard shown, scroll active element into view in case it is blocked by the soft keyboard
                        webView.evaluateJavascript("if (document.activeElement) { document.activeElement.scrollIntoView({behavior: \"smooth\", block: \"center\", inline: \"nearest\"}); }", null);
                    }
                }
            }
        });
    }

I was getting crazy nothing works android:windowSoftInputMode="adjustResize" may help but be sure to have your app not in full screen.

Removing full screen for my app solved the problem with the layout resize with softkeyboard.

<item name="android:windowFullscreen">false</item>

This is how I solved the problem. As Venky said, you have to add

android:windowSoftInputMode="adjustResize"

to your tag in the AndroidManifest.xml file. But in our case, it wasn't enough. Make sure you do this as well with your views, webviews etc. Then we finally made it work.