安卓获取软件盘高度

 public void getSoftwareHeight() {
                final Context context = getApplicationContext();
        final LinearLayout parentLayout =  findViewById(R.id.public_chat_parent);
        final View myLayout = getWindow().getDecorView();
        parentLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            int statusBarHeight;
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();
                // r will be populated with the coordinates of your view that area still visible.
                parentLayout.getWindowVisibleDisplayFrame(r);
                int screenHeight = myLayout.getRootView().getHeight();
                int heightDiff = screenHeight - (r.bottom - r.top);
                if (heightDiff > 100)
                    // if more than 100 pixels, its probably a keyboard
                    // get status bar height
                    statusBarHeight = 0;
                try {
                    Class<?> c = Class.forName("com.android.internal.R$dimen");
                    Object obj = c.newInstance();
                    Field field = c.getField("status_bar_height");
                    int x = Integer.parseInt(field.get(obj).toString());
                    statusBarHeight = context.getResources().getDimensionPixelSize(x);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                int realKeyboardHeight = heightDiff - statusBarHeight;
                Log.d("height","keyboard height = " + realKeyboardHeight);
            }
        });
    }