使用自定义列表视图时访问行项目android

Question

我正在使用自定义列表视图来创建包含每行上的开关和文本视图的列表视图。每行都是从一个名为row.xml的xml文件创建的，列表视图位于主活动xml文件内。这2个XML文件可以在下面看到。

HomeActivity.xml

<FrameLayout 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:background="#0099cc" tools:context=".Activities.HomeActivity"> 

<RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" 
    android:fitsSystemWindows="true" 
    android:background="#ff69539d"> 

    <ListView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/listView" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_marginTop="120dp" 
     android:layout_below="@+id/fullscreen_content_controls"/> 

</RelativeLayout> 

row.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <Switch 
     android:layout_width="wrap_content" 
     android:layout_height="fill_parent" 
     android:id="@+id/switch" 
     android:checked="false" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_marginLeft="10dp" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
     android:text="Switch Name" 
     android:id="@+id/textView" 
     android:layout_alignBottom="@+id/switch" 
     android:layout_toRightOf="@+id/switch" 
     android:layout_marginLeft="20dp" 
     android:layout_marginStart="20dp" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" 
     android:textColor="#000000" /> 
</RelativeLayout> 

我使用自定义列表适配器来填充与文本的文本框列表视图。这可以在下面看到。

customlistAdapter

public class customListAdapter extends BaseAdapter{ 

    Context context; 
    String[] switchName; 
    private static LayoutInflater inflater = null; 

    public customListAdapter(Context context, String[] data) { 
     // TODO Auto-generated constructor stub 
     this.context = context; 
     this.switchName = data; 
     inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     return switchName.length; 
    } 

    @Override 
    public Object getItem(int position) { 
     // TODO Auto-generated method stub 
     return switchName[position]; 
    } 

    @Override 
    public long getItemId(int position) { 
     // TODO Auto-generated method stub 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     // TODO Auto-generated method stub 
     View vi = convertView; 
     if (vi == null) 
      vi = inflater.inflate(R.layout.row, null); 
     TextView text = (TextView) vi.findViewById(R.id.textView); 
     Switch mySwitch = (Switch) vi.findViewById(R.id.switch); 
     mySwitch.setTag(position); 
     text.setText(switchName[position]); 
     return vi; 
    } 
} 

名单适配器与主要活动创建为你可以看到下面。

MainActivity

public class MainActivity extends Activity { 

    ListView lv; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.activity_main); 

     lv = (ListView) findViewById(R.id.listView); 
     lv.setAdapter(new customListAdapter(this, new String[]{"Switch 1", "Switch 2 ", "Switch 3", "Switch 4", "Switch 5", "Switch 6", "Switch 7"})); 

    } 
} 

，我有是能够访问由主要活动自定义列表适配器中创建的交换机的问题。我需要能够保留对主要活动中所有开关的引用，以便我可以更改这些状态​​。理想情况下，我可以在mainActivity中拥有每个开关的列表或数组。任何帮助，将不胜感激。

Answer 1

在你的适配器类，添加类似：

private OnCheckChangedListener mOnCheckChangedListener; 
public void setOnCheckChangedListener(OnCheckChangedListener listener){ 
    mOnCheckChangedListener = listener; 
} 

然后在适配器的getView方法，这样做：

mySwitch.setOnCheckChangedListener(mOnCheckChangedListener); 

然后在活动，所以你想要什么：

private OnCheckChangedListener mOnCheckChangedListener = new OnCheckChangedListener(){ 
    @Override 
    onCheckedChanged(CompoundButton buttonView, boolean isChecked){ 
    // keep a list of what was checked 
    } 
} 

并将其设置在适配器上：

BaseAdapter adapter = new customListAdapter(this, new String[]{"Switch 1", "Switch 2 ", "Switch 3", "Switch 4", "Switch 5", "Switch 6", "Switch 7"}); 
adapter.setOnCheckChangedListener(mOnCheckChangedListener); 
lv.setAdapter(adapter);