ListView中的按钮不可点击 [英] Button inside ListView not clickable

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本文介绍了ListView中的按钮不可点击的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我希望能够点击ListView项目中的按钮。点击整个项目应该有不同的效果。我意识到在stackoverflow上有几个问题，但没有任何建议适用于我。



ListView在一个片段内。


$ 

 < RelativeLayout xmlns：android =http://schemas.android .com / apk / res / android
 xmlns：tools =http://schemas.android.com/tools
 android：layout_width =match_parent
 android：layout_height = match_parent
 android：paddingBottom =@ dimen / activity_vertical_margin
 android：paddingLeft =@ dimen / activity_horizo​​ntal_margin
 android：paddingRight =@ dimen / activity_horizo​​ntal_margin
 android： paddingTop =@ dimen / activity_vertical_margin
 tools：context =。EventFragment> 
 
< ListView 
 android：id =@ + id / event_list
 android：background =＃C0FFFFFF
 android：layout_width =match_parent
 android：layout_height =match_parent
 android：layout_marginTop =5dp/> 
 
< / RelativeLayout>

每个列表项的布局： 

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =match_parent
 android：layout_height =wrap_content 
 android：orientation =vertical
 android：background =＃C0101010> 
 
 TextView 
 android：id =@ + id / event_list_separator
 style =？android：attr / listSeparatorTextViewStyle
 android：layout_width =match_parent 
 android：layout_height =wrap_content
 android：text =separator
 android：textColor =@ android：color / white/> 
 
< LinearLayout 
 android：id =@ + id / event_list_element
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：background =＃FFFFFFFF
 android：padding =6dip> 
 
< ImageView 
 android：id =@ + id / event_list_element_icon
 android：layout_width =26dip
 android：layout_height =60dip
 android：layout_marginRight =6dip
 android：contentDescription =TODO/> 
 
< LinearLayout 
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：orientation =vertical> 
 
 TextView 
 android：id =@ + id / event_list_element_firstLine
 android：layout_width =match_parent
 android：layout_height =25dip
 android：text =item_header
 android：textSize =18sp/> 
 
< LinearLayout 
 android：layout_width =match_parent
 android：layout_height =35dip
 android：orientation =horizo​​ntal> 
 $ b $ TextView 
 android：id =@ + id / event_list_element_secondLine
 android：layout_width =0dip
 android：layout_height =match_parent
 android：layout_weight =1
 android：gravity =center_vertical
 android：ellipsize =marquee
 android：singleLine =true Description
 android：textSize =14sp/> 
 
 $ Button $ b $ android：id =@ + id / event_list_element_button_1
 android：layout_width =132dip
 android：layout_height =match_parent
 android：drawableLeft =@ drawable / ic_button1
 android：text =Participate
 android：textStyle =bold
 android：textSize =14sp
 / > 
 
 $ b< Button 
 android：id =@ + id / event_list_element_button_2
 android：layout_width =110dip
 android：layout_height = match_parent
 android：ellipsize =marquee
 android：drawableLeft =@ drawable / ic_button2
 android：singleLine =true
 android：text = 
 android：textStyle =bold
 android：gravity =center_vertical
 android：textSize =14sp
 /> 
 $ b b TextView 
 android：id =@ + id / event_list_element_additional_text
 android：layout_width =100dip
 android：layout_height =match_parent
 android：ellipsize =marquee
 android：singleLine =true
 android：gravity =center_vertical
 android：textStyle = bold
 android：textSize =14sp/> 
< / LinearLayout> 
< / LinearLayout> 
< / LinearLayout> 
< / LinearLayout>

我的列表适配器是：

static class ViewHolder {
TextView separator;
LinearLayout relativeLayout;
TextView eventHeader;
TextView eventDescription;
ImageView blueDot;
按钮button1;
按钮button2;
}

@Override
public View getView（int position，View convertView，ViewGroup parent）{
ViewHolder viewHolder;

if（convertView == null）{
LayoutInflater inflater =（LayoutInflater）
_context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
convertView = inflater.inflate（R.layout.event_list_item，parent，false）;

viewHolder = new ViewHolder（）;
viewHolder.relativeLayout =（LinearLayout）convertView.findViewById（R.id.event_list_element）;
viewHolder.blueDot =（ImageView）convertView.findViewById（R.id.event_list_element_icon）;
viewHolder.eventHeader =（TextView）convertView.findViewById（R.id.event_list_element_firstLine）;
viewHolder.eventDescription =（TextView）convertView.findViewById（R.id.event_list_element_secondLine）;
viewHolder.button1 =（Button）convertView.findViewById（R.id.event_list_element_button1）;
viewHolder.button2 =（Button）convertView.findViewById（R.id.event_list_element_button2）;
viewHolder.separator =（TextView）convertView.findViewById（R.id.event_list_separator）;
convertView.setTag（viewHolder）;
} else {
viewHolder =（ViewHolder）convertView.getTag（）;
}

final Event item = getItem（position）;
if（item！= null）{
OnClickListener listener = new OnClickListener（）{
@Override
public void onClick（View arg0）{
Toast.makeText _context，boo！，Toast.LENGTH_SHORT）.show（）;
}
};

viewHolder.button1.setOnClickListener（listener）;
}
返回convertView;




$ b $ p
$ b

问题在于两个按钮不可点击。我试过很多： 

  ListView listView =（ListView）rootView.findViewById（R.id.event_list）; 
 listView.setItemsCanFocus（true）;

我也尝试了按钮上的设置：

< pre $ android：focusable =true
android：clickable =true

我还试用了android：descendantFocusability。

我的任何一个尝试都没有使按钮可点击。

android：descendantFocusability =blocksDescendants。
xml应该如下： 

 <？xml version =1.0encoding =utf-8 >？; 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =match_parent
 android：layout_height =wrap_content 
 android：orientation =vertical
 android：descendantFocusability =blocksDescendants
 android：background =＃C0101010> 
 
 TextView 
 android：id =@ + id / event_list_separator
 style =？android：attr / listSeparatorTextViewStyle
 android：layout_width =match_parent 
 android：layout_height =wrap_content
 android：text =separator
 android：textColor =@ android：color / white/> 
 
< LinearLayout 
 android：id =@ + id / event_list_element
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：background =＃FFFFFFFF
 android：padding =6dip> 
 
< ImageView 
 android：id =@ + id / event_list_element_icon
 android：layout_width =26dip
 android：layout_height =60dip
 android：layout_marginRight =6dip
 android：contentDescription =TODO/> 
 
< LinearLayout 
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：orientation =vertical> 
 
 TextView 
 android：id =@ + id / event_list_element_firstLine
 android：layout_width =match_parent
 android：layout_height =25dip
 android：text =item_header
 android：textSize =18sp/> 
 
< LinearLayout 
 android：layout_width =match_parent
 android：layout_height =35dip
 android：orientation =horizo​​ntal> 
 $ b $ TextView 
 android：id =@ + id / event_list_element_secondLine
 android：layout_width =0dip
 android：layout_height =match_parent
 android：layout_weight =1
 android：gravity =center_vertical
 android：ellipsize =marquee
 android：singleLine =true Description
 android：textSize =14sp/> 
 
 $ Button $ b $ android：id =@ + id / event_list_element_button_1
 android：layout_width =132dip
 android：layout_height =match_parent
 android：drawableLeft =@ drawable / ic_button1
 android：text =Participate
 android：textStyle =bold
 android：textSize =14sp
 / > 
 
 $ b< Button 
 android：id =@ + id / event_list_element_button_2
 android：layout_width =110dip
 android：layout_height = match_parent
 android：ellipsize =marquee
 android：drawableLeft =@ drawable / ic_button2
 android：singleLine =true
 android：text = 
 android：textStyle =bold
 android：gravity =center_vertical
 android：textSize =14sp
 /> 
 $ b b TextView 
 android：id =@ + id / event_list_element_additional_text
 android：layout_width =100dip
 android：layout_height =match_parent
 android：ellipsize =marquee
 android：singleLine =true
 android：gravity =center_vertical
 android：textStyle = bold
 android：textSize =14sp/> 
< / LinearLayout> 
< / LinearLayout> 
< / LinearLayout> 
< / LinearLayout>


I want to be able to click on a button inside an item of a ListView. It should have a different effect from clicking the whole item. I realize there are several questions asked on stackoverflow, but none of the suggestions works for me.

The ListView is inside a Fragment.

Layout of the fragment:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".EventFragment" >

    <ListView
        android:id="@+id/event_list"
        android:background="#C0FFFFFF" 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="5dp" />

</RelativeLayout>

Layout of each list item:

<?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="wrap_content"
android:orientation="vertical" 
android:background="#C0101010">

    <TextView
    android:id="@+id/event_list_separator"
    style="?android:attr/listSeparatorTextViewStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="separator"
    android:textColor="@android:color/white" />

    <LinearLayout
    android:id="@+id/event_list_element"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#FFFFFFFF"
    android:padding="6dip" >

        <ImageView
        android:id="@+id/event_list_element_icon"
        android:layout_width="26dip"
        android:layout_height="60dip"
        android:layout_marginRight="6dip"
        android:contentDescription="TODO" />

        <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

            <TextView
            android:id="@+id/event_list_element_firstLine"
            android:layout_width="match_parent"
            android:layout_height="25dip"
            android:text="item_header"
            android:textSize="18sp" />

            <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="35dip"
            android:orientation="horizontal" >

                <TextView
                android:id="@+id/event_list_element_secondLine"
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center_vertical"
                android:ellipsize="marquee"
                android:singleLine="true"
                android:text="Description"
                android:textSize="14sp" />

                <Button
                android:id="@+id/event_list_element_button_1"
                android:layout_width="132dip"
                android:layout_height="match_parent"
                android:drawableLeft="@drawable/ic_button1"
                android:text="Participate"
                android:textStyle="bold"
                android:textSize="14sp"
                />


                <Button
                android:id="@+id/event_list_element_button_2"
                android:layout_width="110dip"
                android:layout_height="match_parent"
                android:ellipsize="marquee"
                android:drawableLeft="@drawable/ic_button2"
                android:singleLine="true"
                android:text="No thanks"
                android:textStyle="bold"
                android:gravity="center_vertical"
                android:textSize="14sp" 
                />

                <TextView
                android:id="@+id/event_list_element_additional_text"
                android:layout_width="100dip"
                android:layout_height="match_parent"
                android:ellipsize="marquee"
                android:singleLine="true"
                android:gravity="center_vertical"
                android:text="sample"
                android:textStyle="bold"
                android:textSize="14sp" /> 
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

My list adapter is:

public class EventAdapter extends ArrayAdapter<Event> {
    static class ViewHolder {
        TextView separator;
        LinearLayout relativeLayout;
        TextView eventHeader;
        TextView eventDescription;
        ImageView blueDot;
        Button button1;
        Button button2;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater)     
            _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.event_list_item, parent, false);

            viewHolder = new ViewHolder();
            viewHolder.relativeLayout = (LinearLayout) convertView.findViewById(R.id.event_list_element);
            viewHolder.blueDot = (ImageView) convertView.findViewById(R.id.event_list_element_icon);
            viewHolder.eventHeader = (TextView) convertView.findViewById(R.id.event_list_element_firstLine);
            viewHolder.eventDescription = (TextView) convertView.findViewById(R.id.event_list_element_secondLine);
            viewHolder.button1 = (Button) convertView.findViewById(R.id.event_list_element_button1);
            viewHolder.button2 = (Button) convertView.findViewById(R.id.event_list_element_button2);
            viewHolder.separator = (TextView) convertView.findViewById(R.id.event_list_separator);
            convertView.setTag(viewHolder);
        } else{
            viewHolder = (ViewHolder) convertView.getTag();
        }

        final Event item = getItem(position);
        if (item != null) {     
            OnClickListener listener = new OnClickListener() {
                @Override
                public void onClick(View arg0) {
                    Toast.makeText(_context, "boo!", Toast.LENGTH_SHORT).show();
                }
            };

            viewHolder.button1.setOnClickListener(listener);            
        }
        return convertView;
    }
}

The problem is that the two buttons are not clickable. What I tried to far:

ListView listView = (ListView) rootView.findViewById(R.id.event_list);
listView.setItemsCanFocus(true);

I also tried setting on the button:

android:focusable="true"
android:clickable="true"

I also experimented with android:descendantFocusability.

None of my tries made the buttons clickable.

解决方案

Insert the attribute android:descendantFocusability="blocksDescendants" in the Parent Layout declaration of each list item. The xml should be as follows:

<?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="wrap_content"
android:orientation="vertical" 
android:descendantFocusability="blocksDescendants"
android:background="#C0101010">

    <TextView
    android:id="@+id/event_list_separator"
    style="?android:attr/listSeparatorTextViewStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="separator"
    android:textColor="@android:color/white" />

    <LinearLayout
    android:id="@+id/event_list_element"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#FFFFFFFF"
    android:padding="6dip" >

        <ImageView
        android:id="@+id/event_list_element_icon"
        android:layout_width="26dip"
        android:layout_height="60dip"
        android:layout_marginRight="6dip"
        android:contentDescription="TODO" />

        <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

            <TextView
            android:id="@+id/event_list_element_firstLine"
            android:layout_width="match_parent"
            android:layout_height="25dip"
            android:text="item_header"
            android:textSize="18sp" />

            <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="35dip"
            android:orientation="horizontal" >

                <TextView
                android:id="@+id/event_list_element_secondLine"
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center_vertical"
                android:ellipsize="marquee"
                android:singleLine="true"
                android:text="Description"
                android:textSize="14sp" />

                <Button
                android:id="@+id/event_list_element_button_1"
                android:layout_width="132dip"
                android:layout_height="match_parent"
                android:drawableLeft="@drawable/ic_button1"
                android:text="Participate"
                android:textStyle="bold"
                android:textSize="14sp"
                />


                <Button
                android:id="@+id/event_list_element_button_2"
                android:layout_width="110dip"
                android:layout_height="match_parent"
                android:ellipsize="marquee"
                android:drawableLeft="@drawable/ic_button2"
                android:singleLine="true"
                android:text="No thanks"
                android:textStyle="bold"
                android:gravity="center_vertical"
                android:textSize="14sp" 
                />

                <TextView
                android:id="@+id/event_list_element_additional_text"
                android:layout_width="100dip"
                android:layout_height="match_parent"
                android:ellipsize="marquee"
                android:singleLine="true"
                android:gravity="center_vertical"
                android:text="sample"
                android:textStyle="bold"
                android:textSize="14sp" /> 
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

这篇关于ListView中的按钮不可点击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！

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