空吐司消息

Question

我有'行'視圖，其中有兩個文本視圖和一個複選框。我試圖實現它，以便當單擊該複選框時，它將在同一行中顯示兩個文本視圖的字符串。

我已經實現了一個for循環來獲取複選框視圖的父級，然後迭代所有父視圖的子級並從它們中獲取字符串。但不是文本，我得到一個空的Toast消息。

我的第一類代碼：

public class InteractiveArrayAdapter extends ArrayAdapter<model> implements 
     OnClickListener { 

    private final List<model> list; 
    private final Activity context; 

    public InteractiveArrayAdapter(Activity context, List<model> list) { 
     super(context, R.layout.rep, list); 
     this.context = context; 
     this.list = list; 
    } 

    static class ViewHolder { 
     protected TextView text; 
     protected CheckBox checkbox; 
    } 

    public View getView(int position, View convertView, ViewGroup parent) { 
     View view = null; 
     if (convertView == null) { 
      LayoutInflater inflator = context.getLayoutInflater(); 
      view = inflator.inflate(R.layout.rep, null); 
      final ViewHolder viewHolder = new ViewHolder(); 
      viewHolder.text = (TextView) view.findViewById(R.id.TextView07); 
      viewHolder.checkbox = (CheckBox) view.findViewById(R.id.CheckBox05); 

      view.getParent(); 

      viewHolder.checkbox 
        .setOnClickListener(new CompoundButton.OnClickListener() { 

         @Override 
         public void onClick(View v) { 
          boolean h = ((CompoundButton) v).isChecked(); 
          model element = (model) viewHolder.checkbox 
            .getTag(); 
          element.setSelected(h); 

          ViewGroup row = (ViewGroup) viewHolder.checkbox 
            .getParent(); 

          for (int itemPos = 0; itemPos < ((ViewGroup) row) 
            .getChildCount(); itemPos++) { 
           View view = ((ViewGroup) row) 
             .getChildAt(itemPos); 
           if (view instanceof TextView) { 
            viewHolder.text = (TextView) view; //Found it! 
            Toast.makeText(context, 
              viewHolder.text.getText(), 10000) 
              .show(); 

            break; 
           } 
          } 
         } 
        }); 

      view.setTag(viewHolder); 
      viewHolder.checkbox.setTag(list.get(position)); 
     } else { 
      view = convertView; 
      ((ViewHolder) view.getTag()).checkbox.setTag(list.get(position)); 
     } 

     ViewHolder holder = (ViewHolder) view.getTag(); 
     holder.text.setText(list.get(position).getName()); 
     holder.checkbox.setChecked(list.get(position).isSelected()); 
     return view; 
    } 
} 

我的第二類模型：

public class ListActivity1 extends ListActivity { 

    public void onCreate(Bundle icicle) { 
     super.onCreate(icicle); 
     setContentView(R.layout.activity_list); 
     // Create an array of Strings, that will be put to our ListActivity 
     InteractiveArrayAdapter adapter = new InteractiveArrayAdapter(this, 
       getModel()); 
     setListAdapter(adapter); 
    } 

    private List<model> getModel() { 
     List<model> list = new ArrayList<model>(); 
     list.add(get("Linux")); 
     list.add(get("Windows7")); 
     list.add(get("Suse")); 
     list.add(get("Eclipse")); 
     list.add(get("Ubuntu")); 
     list.add(get("Solaris")); 
     list.add(get("Android")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 
     list.add(get("iPhone")); 

     // Initially select one of the items 
     list.get(1).setSelected(true); 
     return list; 
    } 

    private model get(String s) { 
     return new model(s); 
    } 
} 

任何一個可以幫助？

Answer 1

請嘗試使用此適配器而不是您的自定義適配器。

public class ListAdapter<T extends BaseEntity> extends ArrayAdapter { 
    @SuppressWarnings("unused") 
    private final List<T> objects; 
    private Activity activity; 

    private final List<T> checkboxStatusListOfObject; 

    private OnClickListener listener; 

    @SuppressWarnings("unchecked") 
    public ListAdapter(Activity activity, List<T> objects, 
     OnClickListener listener, List<T> checkboxStatusListOfObject) { 
     super(R.layout.simple_row_checkbox_1_item_listview , objects); 
     this.objects = objects; 
     this.activity = activity; 
     this.listener = listener; 
     this.checkboxStatusListOfObject = checkboxStatusListOfObject; 

     getFilter(); 
    } 

    @SuppressWarnings("unchecked") 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View rowView = convertView; 
     ObjectViews sqView = null; 

     if(rowView == null) 
     { 
      // Get a new instance of the row layout view 
      LayoutInflater inflater = this.activity.getLayoutInflater(); 
      rowView = inflater.inflate(R.layout.YourCustomLAyout, null); 

      // Hold the view objects in an object, 
      // so they don't need to be re-fetched 
      sqView = new ObjectViews(); 
      sqView.checbox = (CheckBox) rowView.findViewById(R.id.checkbox); 
      if(this.listener !=null){ 
      sqView.checbox.setOnClickListener(this.listener); 
      } 
      sqView.text1 = (TextView) rowView.findViewById(R.id.text); 
      sqView.dataObject = new Object(); 

      // Cache the view objects in the tag, 
      // so they can be re-accessed later 
      rowView.setTag(sqView); 
     } else { 
      sqView = (ObjectViews) rowView.getTag(); 
     } 

     // Transfer the stock data from the data object 
     // to the view objects 
     T object = (T) objects.get(position); 
     sqView.text1.setText(object.toString()); 



     sqView.checbox.setText(""); 
     sqView.checbox.setTag(sqView); 
     sqView.dataObject = object; 

     if(sqView.getChecbox().isChecked()){ 
      if(this.checkboxStatusListOfObject.indexOf(sqView.dataObject) != -1){ 
      sqView.getChecbox().setChecked(true); 
      } 
      else{ 
      sqView.getChecbox().setChecked(false); 
      } 
     } 
     return rowView; 
    } 

    public class ObjectViews { 
     Object dataObject; 
    CheckBox checbox; 
     TextView text1; 
    public Object getDataObject() { 
     return dataObject; 
    } 
    public void setDataObject(Object dataObject) { 
     this.dataObject = dataObject; 
    } 
    public CheckBox getChecbox() { 
     return checbox; 
    } 
    public void setChecbox(CheckBox checbox) { 
     this.checbox = checbox; 
    } 
    public TextView getText1() { 
     return text1; 
    } 
    public void setText1(TextView text1) { 
     this.text1 = text1; 
    } 

    } 

在活動中定義您的偵聽器併發送到適配器。

OnClickListener listener = new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      CheckBox cb = (CheckBox) v ; 
      // here your code 
      if(cb.isChecked()){ 
        ObjectViews object = (ObjectViews) cb.getTag(); 
        String text = object.getText1().getText(); 
        Toast.makeText(context,text, Toast.LENGTH_LONG).show(); 
      } 
     } 
    }; 

//您可以配置此適配器構造函數。這僅是示例

yourListView.setAdapter(
     new ListAdapter(getApplicationContext(), yourObjectList 
      listener, YourSelectedObjectList)); 

和佈局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:paddingBottom="6dip" 
    android:paddingTop="4dip" > 

    <CheckBox 
     android:id="@+id/checkbox" 
     android:layout_width="0dp" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" 
     android:textSize="20dp" /> 

    <TextView 
     android:id="@+id/text" 
     android:layout_width="0dp" 
     android:layout_marginLeft="10dp" 
     android:layout_height="wrap_content" 
     android:layout_weight="4" 
     android:textSize="20dp" /> 

</LinearLayout>