Android 在Adapter getView()方法中通过标记查找动态创建的TextView
这是我的密码:Android 在Adapter getView()方法中通过标记查找动态创建的TextView,android,listview,textview,android-adapter,Android,Listview,Textview,Android Adapter,这是我的密码: @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; View rowView = convertView; LayoutInflater inflater = ((Activity) context).getLayoutInflater(); Planner
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
View rowView = convertView;
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
PlannerMonth m = getItem(position);
ArrayList<PlannerMonthDebt> debts = new ArrayList<PlannerMonthDebt>();
debts = m.debtList;
int debtSize = debts.size();
if (rowView == null) {
rowView = inflater.inflate(R.layout.row_planner_month, null, true);
holder = new ViewHolder();
holder.tv1 = (TextView) rowView.findViewById(R.id.tvPlannerMonth);
holder.tv2 = (TextView)
holder.ll = (LinearLayout) rowView.findViewById(R.id.rlInnerDebtHolder);
for (int i = 0; i < debtSize; i++) {
View custom = inflater.inflate(R.layout.inner_debt_row, null);
TextView tvName = (TextView) custom.findViewById(R.id.tvInnerDebtName);
tvName.setTag(String.valueOf("tvName" + i));
TextView tvPayment = (TextView) custom.findViewById(R.id.tvInnerDebtPayment);
tvPayment.setTag(String.valueOf("tvPayment" + i));
TextView tvDebt = (TextView) custom.findViewById(R.id.tvInnerDebtBalance);
tvDebt.setTag(String.valueOf("tvDebt" + i));
TextView tvBalance = (TextView) custom.findViewById(R.id.tvInnerDebtFee);
tvBalance.setTag(String.valueOf("tvBalance" + i));
holder.ll.addView(custom);
}
rowView.setTag(holder);
} else {
holder = (ViewHolder) rowView.getTag();
}
String month = m.date;
String debtToal = m.debtTotal;
String intTotal = m.intTotal;
holder.tv1.setText(month);
holder.tv2.setText(debtToal);
// now inner debts
int size = 0;
for (PlannerMonthDebt d : debts) {
TextView tvName = (TextView) convertView.findViewWithTag(String.valueOf("tvName" + size));
tvName.setText(d.name);
TextView tvPayment = (TextView) convertView.findViewWithTag(String.valueOf("tvPayment" + size));
tvPayment.setText(d.payment);
TextView tvDebt = (TextView) convertView.findViewWithTag(String.valueOf("tvDebt" + size));
tvDebt.setText(d.balance);
TextView tvBalance = (TextView) convertView.findViewWithTag(String.valueOf("tvBalance" + size));
tvBalance.setText(d.fees);
size++;
}
return rowView;
}
我有一个线性布局(holder.ll
),其中我添加了X个自定义行(基于上面粘贴的内部债务行
布局)
我知道如何显示行,但我在使用setTag()
查找和检索行时遇到了问题,因此我可以(通过setText()
将值放入行中)
对于标记
,我基本上为每个文本视图
使用相同的名称,但也为名称添加了一个唯一的位置。我使用位置(或大小)使每个动态添加的文本字段在搜索时保持唯一
在我的LogCat
中,我在这一行得到一个NullPointer
:
TextView-tvName=(TextView)convertView.findViewWithTag(String.valueOf(“tvName”+size));
这是第一次为动态TextView
赋值,因此我假设它们都找不到
如何通过标记找到正确的TextView实例?findViewWithTag()
代码看起来正确。是否检查convertView
是否为空
convertView
在创建新行时将为空(即不重用上一行),但您只分配rowView
,而不是convertView
您在每个位置都有不同的debtSize
。当convertView!=null
和更少的debtSize
时,您有NullPointer
,当更多时,您有空文本视图。正是这样。应该使用打字rowView.findViewWithTag()
取而代之。谢谢!
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/tvInnerDebtName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:text="TextView" />
<TextView
android:id="@+id/tvInnerDebtFee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:text="TextView" />
<TextView
android:id="@+id/tvInnerDebtPayment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:text="TextView" />
<TextView
android:id="@+id/tvInnerDebtBalance"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>