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原标题:CheckedTextView not clickable

Hi i setup a CheckedTextView but I can t get the onClick event functioning. I put the onClick code in the onCreate of the main.layout but I get a nullpointer at line 101, which is chkBox.setOnClickListener(new View.OnClickListener(). The Listview is created in the onPostExecute of a AsyncTask. Can someone please help?

MyeckedTextView:

<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"  
         android:id="@+id/listCheckboxview"  
         android:layout_width="wrap_content"  
         android:layout_height="wrap_content"  
         android:layout_weight="1" android:gravity="left"  
         android:textColor="#0075AB"  android:textStyle="bold"  android:textSize="14dip" 
         android:checkMark="?android:attr/listChoiceIndicatorMultiple"   
         android:clickable="true" 
         android:focusable="true" 
         android:text=""  
         /> 

我的Click活动:

CheckedTextView chkBox = (CheckedTextView) findViewById(R.id.listCheckboxview); 
        chkBox.setOnClickListener(new View.OnClickListener() { 
        public void onClick(View v) 
        { 
            ((CheckedTextView) v).toggle(); 
        } 
    });
最佳回答

我将《浮标法》放在主轴心上。 第101行,即chkBox.setOnClickListener(新观点)。

This means that chkBox is null, which means that Android is not finding R.id.listCheckboxview. Make sure you are calling findViewById() on the right thing (here, you appear to be calling it on the activity, but your question mentions a ListView). Also, try cleaning your project (Project > Clean from the Eclipse main menu, or ant clean from the command line), as sometimes the R constants get out of sync.

问题回答

http://developer.android.com/vis/android/widget/ToggleButton.html” rel=“nofollow” ToggleButton的构成部分还有一个令人感兴趣的特点,即为它制定案文。 在国家和另一个国家。 举例来说,插图一号也包含着文字颜色的选定器。

<ToggleButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:button="@null"
    android:background="@null"
    android:paddingLeft="10dp"
    android:layout_centerHorizontal="true"
    android:gravity="center"
    android:textColor="@drawable/toggle_text"
    android:textOn="My on state"
    android:textOff="My off state" />

toggle_text.xml

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

    <item
        android:state_checked="true"
        android:color="@color/app_color" />

    <item
        android:color="@android:color/darker_gray" />

</selector>




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