为啥滚动时列表视图项目内的图像视图会消失？
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【中文标题】为啥滚动时列表视图项目内的图像视图会消失？【英文标题】：Why the Image view inside the item of a list view disappears when i scroll?为什么滚动时列表视图项目内的图像视图会消失？ 【发布时间】：2015-12-03 01:57:32 【问题描述】：我在标签片段中有一个列表视图， 现在在列表视图中，我有两个视图，一个视图已经不可见。当我滚动列表视图时，两个视图都消失了。我正在处理持有者，但我仍然面临问题。
这是我的 xml：
<RelativeLayout
android:id="@+id/rl_maino"
android:layout_
android:layout_
android:background="@color/white"
>
<RelativeLayout
android:id="@+id/rl_coloro"
android:layout_
android:layout_
android:layout_alignParentLeft="true"
android:layout_marginTop="13dp"
android:background="@color/green"
>
</RelativeLayout>
<LinearLayout
android:id="@+id/ll_texto"
android:layout_
android:layout_
android:orientation="vertical"
android:layout_marginTop="14dp"
android:layout_marginLeft="16dp">
<TextView
android:id="@+id/tv_subtitleo"
android:layout_
android:layout_
android:textColor="@color/black"
android:textSize="14sp"
android:text="Header" />
<TextView
android:id="@+id/tv_subo"
android:layout_
android:layout_
android:textColor="@color/addr_col"
android:textSize="12sp"
android:layout_marginTop="3dp"
android:text="subtext subtext subtext subtext subtext subtexts ubtexts subtexts" />
</LinearLayout>
<TextView
android:id="@+id/tv_costo"
android:layout_
android:layout_
android:layout_marginTop="14dp"
android:layout_marginRight="16dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:textColor="@color/black"
android:text="AED 12200" />
<LinearLayout
android:id="@+id/ll_addo"
android:layout_
android:layout_
android:layout_below="@id/tv_costo"
android:orientation="horizontal"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginTop="3dp"
android:layout_marginBottom="14dp"
android:layout_marginRight="16dp"
>
<ImageView
android:id="@+id/iv_minuso"
android:layout_
android:layout_
android:src="@drawable/minus_selector"
android:visibility="gone"/>
<TextView
android:id="@+id/tv_numbero"
android:layout_
android:layout_
android:layout_gravity="center_vertical"
android:textColor="@color/black"
android:layout_margin="5dp"
android:gravity="center"
android:textSize="15sp"
android:text="0" />
<ImageView
android:id="@+id/iv_pluso"
android:layout_
android:layout_
android:src="@drawable/plus_selector" />
</LinearLayout>
<LinearLayout
android:id="@+id/ll_unavailo"
android:layout_
android:layout_
android:layout_below="@id/tv_costo"
android:orientation="horizontal"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginTop="3dp"
android:layout_marginBottom="10dp"
android:layout_marginRight="16dp"
android:visibility="gone"
>
<TextView
android:id="@+id/tv_unavailo"
android:layout_
android:layout_
android:layout_gravity="center_vertical"
android:textColor="@color/addr_col"
android:layout_margin="2dp"
android:gravity="center_vertical|right"
android:textSize="12sp"
android:text="@string/c_unavail" />
</LinearLayout>
</RelativeLayout>
这是我的适配器：
public View getView(int position, View convertView, ViewGroup parent)
final ViewHolder holder;
if (convertView == null)
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.only_pro_items, null);
holder=new ViewHolder();
holder.rl_main=(RelativeLayout)convertView.findViewById(R.id.rl_maino);
holder.rl_color=(RelativeLayout)convertView.findViewById(R.id.rl_coloro);
holder.ll_unavail=(LinearLayout)convertView.findViewById(R.id.ll_unavailo);
holder.ll_text=(LinearLayout)convertView.findViewById(R.id.ll_texto);
holder.ll_add=(LinearLayout)convertView.findViewById(R.id.ll_addo);
holder.tv_subtitle=(TextView)convertView.findViewById(R.id.tv_subtitleo);
holder.tv_sub=(TextView)convertView.findViewById(R.id.tv_subo);
holder.tv_cost=(TextView)convertView.findViewById(R.id.tv_costo);
holder.tv_number=(TextView)convertView.findViewById(R.id.tv_numbero);
holder.tv_unavail=(TextView)convertView.findViewById(R.id.tv_unavailo);
holder.iv_minus=(ImageView)convertView.findViewById(R.id.iv_minuso);
holder.iv_plus=(ImageView)convertView.findViewById(R.id.iv_pluso);
convertView.setTag(holder);
else
Log.d("ttt", "3");
holder=(ViewHolder) convertView.getTag();
holder.tv_subtitle.setTypeface(gotham_book);
holder.tv_sub.setTypeface(gotham_light);
holder.tv_cost.setTypeface(gotham_book);
holder.tv_number.setTypeface(gotham_book);
holder.tv_unavail.setTypeface(gotham_light);
final Model_OnlyProduct model=arr_model.get(position);
holder.tv_subtitle.setText(model.getTv_name());
holder.tv_sub.setText(model.getTv_sub_name());
final int price[]=0;
if (!model.getTv_price().matches(""))
holder.tv_cost.setText(Constants.currency+model.getTv_price());
price[0]=Integer.parseInt(model.getTv_price());
else
holder.tv_cost.setText("From "+Constants.currency+model.getFrom_price());
price[0]=Integer.parseInt(model.getFrom_price());
if (model.getInStock().matches("In Stock"))
holder.ll_unavail.setVisibility(View.GONE);
else
holder.ll_unavail.setVisibility(View.VISIBLE);
holder.ll_add.setVisibility(View.GONE);
String food_class=model.getRl_color();
switch (food_class)
case "Veg":
holder.rl_color.setBackgroundColor(activity.getResources().getColor(R.color.veg_green));
break;
case "Non Veg":
holder.rl_color.setBackgroundColor(activity.getResources().getColor(R.color.non_red));
break;
case "Egg":
holder.rl_color.setBackgroundColor(activity.getResources().getColor(R.color.egg_yellow));
break;
case "":
holder.rl_color.setBackgroundColor(activity.getResources().getColor(R.color.white));
break;
final int[] count=0;
if (count[0]==0)
holder.tv_number.setVisibility(View.INVISIBLE);
holder.iv_plus.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
if (count[0]>=0&&count[0]!=99)
Log.d("qqq", "ar1r="+model.getCustom_status());
if (model.getCustom_status().matches("1"))
if (model.getCustom_type().matches("Combo"))
Intent intent=new Intent(activity, Combo.class);
intent.putExtra(Constants.ITEM_ID, String.valueOf(model.getId()));
intent.putExtra(Constants.ITEM_NAME,model.getTv_name());
if (!model.getTv_price().matches(""))
intent.putExtra(Constants.ITEM_TYPE, "price");
intent.putExtra(Constants.ITEM_PRICE, model.getTv_price());
else
intent.putExtra(Constants.ITEM_TYPE, "from");
intent.putExtra(Constants.ITEM_PRICE, model.getFrom_price());
intent.putExtra(Constants.ITEM_COUNT, String.valueOf(count[0]));
intent.putExtra(Constants.ITEM_SUBTEXT, model.getTv_sub_name());
intent.putExtra(Constants.ITEM_FROM, "menu");
intent.putExtra(Constants.VIEW_INDEX, ""+model.getView_index());
activity.startActivity(intent);
activity.overridePendingTransition(R.anim.move_up, R.anim.stay);
else
Intent intent=new Intent(activity, Toppings.class);
intent.putExtra(Constants.ITEM_ID, String.valueOf(model.getId()));
intent.putExtra(Constants.ITEM_NAME,model.getTv_name());
if (!model.getTv_price().matches(""))
intent.putExtra(Constants.ITEM_TYPE, "price");
intent.putExtra(Constants.ITEM_PRICE, model.getTv_price());
else
intent.putExtra(Constants.ITEM_TYPE, "from");
intent.putExtra(Constants.ITEM_PRICE, model.getFrom_price());
intent.putExtra(Constants.ITEM_COUNT, String.valueOf(count[0]));
intent.putExtra(Constants.ITEM_SUBTEXT, model.getTv_sub_name());
intent.putExtra(Constants.ITEM_FROM, "menu");
activity.startActivity(intent);
activity.overridePendingTransition(R.anim.move_up, R.anim.stay);
else
holder.tv_number.setVisibility(View.VISIBLE);
count[0]++;
Constants.cart_count++;
activity.runOnUiThread(new Runnable()
@Override
public void run()
// TODO Auto-generated method stub
holder.tv_number.setText(String.valueOf(count[0]));
FragmentMenu.tv_count.setVisibility(View.VISIBLE);
FragmentMenu.tv_count.setText(String.valueOf(Constants.cart_count));
int total=price[0];
Constants.cart_amount+=total;
FragmentMenu.tv_cart_money.setText(Constants.currency+Constants.cart_amount);
);
Constants.count++;
String id=String.valueOf(Constants.count);
HashMap<String, String> map=new HashMap<String, String>();
map.put(Constants.ITEM_ID, String.valueOf(model.getId()));
map.put(Constants.ITEM_NAME, model.getTv_name());
map.put(Constants.ITEM_PRICE, model.getTv_price());
map.put(Constants.ITEM_PRICE, model.getTv_price());
map.put(Constants.ITEM_COUNT, String.valueOf(count[0]));
map.put(Constants.ID, id);
if (Constants.arr_global.size()>0)
int count=Constants.arr_global.size();
boolean yettop=false;
int qwer=0;
for (int i = 0; i < count; i++)
HashMap<String, String> map2=Constants.arr_global.get(i);
String item_id=map2.get(Constants.ITEM_ID);
if (item_id.matches(String.valueOf(model.getId())))
yettop=true;
qwer=i;
break;
else
yettop=false;
if (yettop)
Constants.arr_global.remove(qwer);
Constants.arr_global.add(map);
else
Constants.arr_global.add(map);
else
Constants.arr_global.add(map);
);
return convertView;
问题是：
if (model.getInStock().matches("In Stock"))
holder.ll_unavail.setVisibility(View.GONE);
else
holder.ll_unavail.setVisibility(View.VISIBLE);
holder.ll_add.setVisibility(View.GONE);
在这个循环中，下一个项目的可见性得到改变..
【问题讨论】：
您的布局不包含任何按钮... 我的错误图片视图 【参考方案1】：使用这个条件并检查
if (model.getInStock().matches("In Stock"))
holder.ll_add.setVisibility(View.VISIBLE);
holder.ll_unavail.setVisibility(View.GONE);
else
holder.ll_unavail.setVisibility(View.VISIBLE);
holder.ll_add.setVisibility(View.GONE);
【讨论】：
欢迎您也必须对 holder.tv_number 做同样的事情，我认为以上是关于为啥滚动时列表视图项目内的图像视图会消失？的主要内容，如果未能解决你的问题，请参考以下文章
在我的 android 应用程序中滚动列表视图时，数据正在消失。我在片段中使用列表视图