我怎样才能显示一个按钮时，所有的意见viewpager被视为？ [英] How can I show a button when all views are viewed in viewpager?

问题描述

现在我有一个保存按钮，我想如果显示的全部viewpager里面的观点，只显示。这意味着，当用户扫描的视图之间，并看到一个viewpager内的所有意见，然后显示保存按钮。

我要显示保存每个视图按钮时，他们已经在此之后看到的所有景致。

我遇到的问题是如何建立的逻辑。我开始了设定的保存按钮看不见，直到viewpager的最后一个视图。在viewpager的最后一个视图，显示保存按钮。但问题是，当用户进入到最后一个视图（有一个保存按钮），然后返回到previous视图，保存按钮不见了。

所以，我想知道我怎么能显示出永久保存按钮上的所有意见的用户看到所有意见后？

下面是我到目前为止有：

我有这个片段我InstantiateItem内（）：

 如果（isViewed）
{
 save_button.setVisibility（Button.VISIBLE）;
 的System.out.println（这就是所谓的isViewed =真的吗？）;
 }否则如果（位置== numberOfPages.size（） -  1）{ isViewed = TRUE;
 save_button.setVisibility（Button.VISIBLE）;
 }
 

其中，

  @覆盖
公共无效使用onPageSelected（INT位置）{
isViewed = TRUE;
}
 

编辑：

我尝试以下解决方案，但没有运气。

 按钮save_button =（按钮）findViewById（R.id.save）;
                    如果（isViewed [位置]）
                    {
                        save_button.setVisibility（Button.VISIBLE）;
                    }
                    如果（位置== numberOfPages.length-1安培;＆安培;！isViewed [位置]）{
                        isViewed [位置] =真;
                        save_button.setVisibility（Button.VISIBLE）;
                    }
                    isViewed [位置] =真;
 

和

  isViewed [位置] =真;
                    如果（isViewed [位置] == isViewed [numberOfPages.length-1]）{
                        save_button.setVisibility（Button.VISIBLE）;
                    }
                        如果（isViewed [位置]）{
                            save_button.setVisibility（Button.VISIBLE）;
                        }其他{
                            save_button.setVisibility（Button.INVISIBLE）;
                        }
 

解决方案

在你的使用onPageSelected ，请执行以下操作

 如果（isViewed）
{
 save_button.setVisibility（Button.VISIBLE）;
 }
 如果（位置== numberOfPages.size（） -  1）{
 isViewed = TRUE;
 save_button.setVisibility（Button.VISIBLE）;
 }
 

请注意上面是两个独立的if语句。

请您 isViewed 全球和默认为假。

Right now I have a save button that I want to show only if all the views inside a viewpager are shown. That means that when the user swipes between views and have seen all views inside a viewpager, then show a save button.

I want to show the save button on every view when they have seen all views hereby after.

The trouble I am having is how to set up the logic. I started out with setting the save button invisible until the last view of the viewpager. On the last view of the viewpager, show the save button. But the problem is when the user goes to the last view (there's a save button) and then goes back to a previous view, the save button is gone.

So, I was wondering how can I show the save button permanently on all views after the user has seen all views?

Here's what I have so far:

I have this snippet inside my InstantiateItem() :

if(isViewed)
{
 save_button.setVisibility(Button.VISIBLE);
 System.out.println("Is this called? isViewed = true");


 }else if (position == numberOfPages.size()-1) {

 isViewed = true;
 save_button.setVisibility(Button.VISIBLE);
 }

where

@Override
public void onPageSelected(int position) {
isViewed = true;
}

EDIT:

I tried the following solutions but with no luck.

Button save_button = (Button) findViewById(R.id.save);
                    if(isViewed[position])
                    {
                        save_button.setVisibility(Button.VISIBLE);
                    }
                    if (position == numberOfPages.length-1 && !isViewed[position]) {
                        isViewed[position] = true;
                        save_button.setVisibility(Button.VISIBLE);
                    }
                    isViewed[position] =true;

And

isViewed[position] = true;
                    if (isViewed[position] == isViewed[numberOfPages.length-1]) {
                        save_button.setVisibility(Button.VISIBLE);
                    }
                        if (isViewed[position]) {
                            save_button.setVisibility(Button.VISIBLE);
                        } else {
                            save_button.setVisibility(Button.INVISIBLE);
                        }

解决方案

In your onPageSelected, do the following

if(isViewed)
{
 save_button.setVisibility(Button.VISIBLE);
 }
 if (position == numberOfPages.size()-1) {
 isViewed = true;
 save_button.setVisibility(Button.VISIBLE);
 }

Note the above are two seperate if statements.

Make your isViewed global and default to false.

这篇关于我怎样才能显示一个按钮时，所有的意见viewpager被视为？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！