突出显示gridview上的选定项目 [英] Highlight selected item on a gridview

问题描述

我试图突出显示gridview上的选定项目（dinamically填充了适配器），但它不起作用。

我做了研究，我甚至试过精确地复制其他人的选择器，甚至他们把它放在gridview上的方式，但我不能把它的工作。

它只是没有做任何事情。每个项目的背景都是白色的（就像我想要的），但是当我按下它（它位于textview或imageview的顶部（gridview项目的一部分））时，它不会执行任何操作。 imageView或textview，它会做我想做的。

编辑：我有图像和textviews的监听器，所以它可能会干扰这个选择器？解决这个问题？

以下是我创建gridview的活动的代码：

  protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.highway_appselection_activity）; 
 gridView =（GridView）findViewById（R .id.HighwayGridView）; 
 
 gridView.setSelector（new ColorDrawable（Color.BLACK））; 
  

下面是这个gridview中每个项目的xml :(我将背景定义为选择器）

 <？xml version =1.0encoding =ut F-8\" >？; 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =match_parent
 android：layout_height =match_parent 
 android：id =@ + id / HighwayGridViewItem
 android：orientation =vertical
 android：background =@ drawable / highway_appselection_selector
 android：padding =5dp > 
 
< cm.aptoide.lite.HighwayCustomImageView 
 android：layout_width =72dp
 android：layout_height =72dp
 android：id =@ id / highwayGridViewItemIcon
 android：background =＃FFFFFF
 android：layout_gravity =center
 android：scaleType =centerCrop
 android：padding =5dp
 android：clickable =true/> 
 
 <！ - 这是否需要成为我的自定义图像视图？在这方面挑战 - > 
< LinearLayout 
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：orientation =horizo​​ntal> 
 
 TextView 
 android：layout_width =wrap_content
 android：layout_height =match_parent
 android：id =@ + id / highwayGridViewItemName
 android：textColor =＃000000
 android：text =texto de teste
 android：textSize =10sp
 android：focusable =true
 android ：ellipsize =marquee
 android：marqueeRepeatLimit =marquee_forever
 android：layout_weight =2
 android：textStyle =bold
 android：paddingRight =5dp 
 android：layout_marginLeft =5dp
 android：clickable =true/> 
 
< ImageView 
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：src =@ drawable / info_icon
 android：padding =5dp
 android：clickable =true
 android：id =@ + id / highwayGridViewItemInfoButton/> 
  

这里是我的选择器：

 < selector xmlns：android =http：/ / android / exit： 
< item android：state_enabled =trueandroid：state_pressed =trueandroid：drawable =@ color / green_main_color/> 
< item android：state_enabled =trueandroid：state_focused =trueandroid：drawable =@ color / green_main_color/> 
< item android：state_enabled =trueandroid：state_selected =trueandroid：drawable =@ color / green_main_color/> 
< item android：drawable =@ android：color / white/> 
  

我可能会错过一些东西，我是Android的新手，很抱歉，如果有新手的错误。 创建文件 selector.xml as：



 <？xml version =1.0encoding =utf-8？ > 
< selector xmlns：android =http://schemas.android.com/apk/res/android> 
 
< item android：drawable =@ color / green_main_colorandroid：state_pressed =true/> 
< item android：drawable =@ color / green_main_colorandroid：state_selected =true/> 
< item android：drawable =@ color / white/> 
 
< / selector> 
  

将您的选择器文件放在可绘制文件夹中作为 drawable / selector.xml 然后在你的gridView中：



 < GridView 
 android：id =@ + id / gridview
 android：layout_width =fill_parent
 android：layout_height =fill_parent
 android：numColumns =auto_fit
 android：verticalSpacing =10dp
 android：horizo​​ntalSpacing =10dp
 android：stretchMode =columnWidth
 android：gravity =center
 android：listSelector =@ drawable / list_selector
 android： scrollbars =none/> 
  




I am trying to highlight a selected item on a gridview (dinamically populated with an adapter), but it is not working.

I did research and i even tried to copy exactly the selector of other people and even the way that they put it on the gridview but i am not being able to put it working.

It just doesn't do anything. The background of each item is white (like i wanted), but when i press it (it it is on top of a textview or a imageview (part of the gridview item) it doesn't do anything. If i press out of the imageView or textview, it will do what i want.

EDIT : I have listeners for the images and the textviews, so it might be interfering with this selector ? How could i solve this problem?

Here is the code of the activity where i create the gridview :

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.highway_appselection_activity);
    gridView= (GridView) findViewById(R.id.HighwayGridView);

    gridView.setSelector(new ColorDrawable(Color.BLACK));

Here is the xml of each item of this gridview : (where i define the background as the selector)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/HighwayGridViewItem"
android:orientation="vertical"
android:background="@drawable/highway_appselection_selector"
android:padding="5dp">

<cm.aptoide.lite.HighwayCustomImageView
    android:layout_width="72dp"
    android:layout_height="72dp"
    android:id="@+id/highwayGridViewItemIcon"
    android:background="#FFFFFF"
    android:layout_gravity="center"
    android:scaleType="centerCrop"
    android:padding="5dp"
    android:clickable="true"/>

<!-- does this need to be my custom image view anymore? CHeck on that-->
<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="horizontal">

    <TextView
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:id="@+id/highwayGridViewItemName"
       android:textColor="#000000"
       android:text="texto de teste"
       android:textSize="10sp"
        android:focusable="true"
       android:ellipsize="marquee"
       android:marqueeRepeatLimit="marquee_forever"
       android:layout_weight="2"
       android:textStyle="bold"
        android:paddingRight="5dp"
        android:layout_marginLeft="5dp"
        android:clickable="true"/>

   <ImageView
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:src="@drawable/info_icon"
       android:padding="5dp"
       android:clickable="true"
       android:id="@+id/highwayGridViewItemInfoButton"/>

And here is my selector :

  <selector xmlns:android="http://schemas.android.com/apk/res/android"  android:exitFadeDuration="@android:integer/config_mediumAnimTime">
<item android:state_enabled="true" android:state_pressed="true" android:drawable="@color/green_main_color" />
<item android:state_enabled="true" android:state_focused="true" android:drawable="@color/green_main_color" />
<item android:state_enabled="true" android:state_selected="true" android:drawable="@color/green_main_color" />
<item android:drawable="@android:color/white" />

I might be missing something, I am new to Android, sorry if there is any rookie mistake.

解决方案

Create file selector.xml as:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@color/green_main_color" android:state_pressed="true"/>
    <item android:drawable="@color/green_main_color" android:state_selected="true"/>
    <item android:drawable="@color/white"/>

</selector>

Put your selector file in drawable folder as drawable/selector.xml and then in your gridView:

 <GridView 
    android:id="@+id/gridview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:numColumns="auto_fit" 
    android:verticalSpacing="10dp" 
    android:horizontalSpacing="10dp" 
    android:stretchMode="columnWidth" 
    android:gravity="center"
    android:listSelector="@drawable/list_selector"
    android:scrollbars="none" />

这篇关于突出显示gridview上的选定项目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！