移动用户反馈页面导航问题 about alicloud-android-demo HOT 1 OPEN

    @Override
    public void onBackPressed() {
        if (webView == null && fragment != null) {
            // 通过反射获取 WebView 对象, 以便管理导航
            Field[] fields = fragment.getClass().getDeclaredFields();
            for (Field field : fields) {
                if (WebView.class.isAssignableFrom(field.getType())) {
                    field.setAccessible(true);
                    try {
                        webView = (WebView) field.get(fragment);
                    } catch (IllegalAccessException ignore) {
                        // never
                    }
                    break;
                }
            }
        }

        if (webView == null) {
            super.onBackPressed();
        } else {
            if (webView.canGoBack()) {
                webView.goBack();
                if (url == null) {
                    url = webView.getUrl();
                } else {
                    // webView 退到最后一页时, 协助关闭页面
                    if (url.equals(webView.getUrl())) {
                        super.onBackPressed();
                    } else {
                        url = webView.getUrl();
                    }
                }
            } else {
                super.onBackPressed();
            }
        }
    }