Question

我有一个自定义的布局，如图所示。通过SMS完成激活。因此，一旦SMS激活，“未激活文本”消失，绿色箭头用灰色箭头切换。我的布局xml文件如下所示。我有两个图片视图"@+id/list_arrow"和"@+id/green_list_arrow"。在SMSReceiver中，我用

更新

lvObjects = (ListView)myView.findViewById(android.R.id.list);       
lvObjects.post(new Runnable() { public void run() { MyListFragment.adapter.notifyDataSetChanged(); } } );

在自定义ListView的getView()中，我更新为好像“已激活”我使用@+id/list_arrow而“未激活”我使用@+id/green_list_arrow。测试时，“未激活的文本”消失，但绿色箭头永远不会更新。可能会遗漏什么？感谢

Edit1：一旦激活，我也想停止setOnClickListener()。我怎么能这样做？

public View getView(int position, View convertView, ViewGroup parent) { 
        BitmapWorkerTask task = null;
        View vi=convertView;
        ViewHolder viewHolder=new ViewHolder();
        LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if(vi==null){

            vi = inflater.inflate(R.layout.list_row, parent, false);
            viewHolder.id=(TextView)vi.findViewById(R.id.title);
            viewHolder.thumbnailImage=(ImageView)vi.findViewById(R.id.list_image);
            viewHolder.activationStatus = (TextView)vi.findViewById(R.id.activated);
            if(position > maxRowNumber)
                  maxRowNumber = position;

            vi.setTag(viewHolder);            
        }else{
            viewHolder=(ViewHolder)vi.getTag();               
        }
        viewHolder.thumbnailImage.setOnClickListener(new onMyClick(position)); 
        viewHolder.id.setText(listIDs.get(position));

         if(activationState.get(position).equals("Activated")) {             
             viewHolder.arrow=(ImageView)vi.findViewById(R.id.list_arrow);
             viewHolder.activationStatus.setText(""); 

         }
         else{
            viewHolder.arrow=(ImageView)vi.findViewById(R.id.green_list_arrow);
            viewHolder.activationStatus.setText(activationState.get(position));
                viewHolder.activationStatus.setTextColor(android.graphics.Color.GRAY);
                viewHolder.arrow.setOnClickListener(new onMyArrowClick(position));
         }


         String hasnoimageyet = "no";
         if(position > maxRowNumber && maxRowNumber > 3 ){//it is for sure

             hasnoimageyet = this.listRowhasnoImageyet.get(position); 
         }

             String id = listIDs.get(position);
             task.execute(id);   

         }      
        return vi;
    }

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/list_background_selector"
    android:orientation="horizontal"
    android:padding="5dip" >

    <!--  ListRow Left sied Thumbnail image -->
    <LinearLayout android:id="@+id/thumbnail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="3dip"
        android:layout_alignParentLeft="true"
        android:background="@drawable/image_bg"
        android:layout_marginRight="5dip">

        <ImageView
            android:id="@+id/list_image"
            android:layout_width="50dip" 
            android:focusable="false"
            android:clickable="true"
            android:onClick="imageViewisClicked"    
            android:contentDescription="@string/image_view_description"
            android:layout_height="50dip"
            android:src="@drawable/icons_preview"
            />

    </LinearLayout>

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/thumbnail"
        android:textColor="#040404"
        android:typeface="sans"
        android:textSize="15sp"
        android:textStyle="bold"/>

     <!-- Rightend Arrow -->
     <ImageView 
        android:id="@+id/list_arrow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:contentDescription="@string/arrow"
        android:layout_alignParentRight="true"
        android:src="@drawable/arrow"

        android:layout_centerVertical="true"/>

      <ImageView 
        android:id="@+id/green_list_arrow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:contentDescription="@string/arrow"
        android:layout_alignParentRight="true"
        android:src="@drawable/green_arrow"

        android:layout_centerVertical="true"/>

     <TextView
        android:id="@+id/activated"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/title"
        android:paddingLeft="20dp"
        android:typeface="sans"
        android:textStyle="italic"
        android:textSize="15sp"/>

</RelativeLayout>

Answer 1

无论如何，您的布局都会在绿色箭头上绘制绿色箭头。（因为它低于xml中的另一个）

您可以根据状态切换两者的可见性，也可以只为箭头设置一个ImageView并更改位图。（以下代码）可以通过将OnClickListener设置为null来禁用它。

if(activationState.get(position).equals("Activated")) {             
             viewHolder.arrow=(ImageView)vi.findViewById(R.id.list_arrow);
             viewHolder.arrow.setImageResource(R.drawable.arrow);
             viewHolder.activationStatus.setText(""); 
             viewHolder.thumbnailImage.setOnClickListener(null); 

} else{
            viewHolder.arrow=(ImageView)vi.findViewById(R.id.green_list);
            viewHolder.arrow.setImageResource(R.drawable.green_arrow);
            viewHolder.activationStatus.setText(activationState.get(position));
            viewHolder.activationStatus.setTextColor(android.graphics.Color.GRAY);
            viewHolder.arrow.setOnClickListener(new onMyArrowClick(position));
            viewHolder.thumbnailImage.setOnClickListener(new onMyClick(position)); 
}

更平滑的解决方案是在图像视图上使用StateListDrawable或甚至更好的滤色镜。

如何动态切换两个布局组件

1 个答案: