android屏幕适配----虚拟按键

/**
     * 通过反射，获取包含虚拟键的整体屏幕高度
     *
     * @return
     */
    private int getHasVirtualKey(Context context) {
        int dpi = 0;
        Display display = ((Activity) context).getWindowManager().getDefaultDisplay();
        DisplayMetrics dm = new DisplayMetrics();
        @SuppressWarnings("rawtypes")
        Class c;
        try {
            c = Class.forName("android.view.Display");
            @SuppressWarnings("unchecked")
            Method method = c.getMethod("getRealMetrics", DisplayMetrics.class);
            method.invoke(display, dm);
            dpi = dm.heightPixels;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dpi;
    }