问题描述
这是什么意思?我一直在争取这个的ListView
,我已经使用了 ArrayAdapter
。我写了这个漂亮的对话框片段,我已经回调到的updateUI听者的原因我想更新这个的ListView
我从 DialogFragment 起初
ArrayAdapter
是一个复杂类型的类我创建的:
ArrayAdapter<地点> theLocations;
...
//在oncreateview
theLocations =新的ArrayAdapter<地点>(mContext,R.layout.location_row,地点);
//这里的位置是一个ArrayList<地点>
然后,我有:
公共无效onUIUpdate(位置L){//从对话片段称为
locations.add(升);
theLocations.notifyDataSetChanged();
}
那么让我切换到只使用了上述误差
的String [] locationNames =新的String [sizeofLocations]
theLocations =新的ArrayAdapter<字符串>(mContext,R.layout.location_Row,locationNames);
公共无效onUIUpdate(位置L){
locations.add(升);
locationNames =新的String [locations.size()];
对于(locations.size()等...){
locationNames [I] =新字符串(locations.get(ⅰ).getName());
}
theLocations.notifyDataSetChanged();
}
这没有错误在我的更新方法(即更新UI),但它并没有任何更新。所以,我很失落,如何更新此ArrayAdapter,我还以为有NotifyChange应该做的,但它要么什么也不做,或抛出上述错误。
我在我的节目在其他地方我SimpleCursorAdapters任何问题(只要我的游标保持打开状态,我呼吁重新查询他们)。
任何见解什么,我做错了什么?
根据要求,这里是我的布局为R.layout.location_row
< XML版本=1.0编码=UTF-8&GT?;
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_height =WRAP_CONTENT机器人:layout_width =FILL_PARENT机器人:方向=横向>
< TextView的Android版本:文本=@ + ID / TextView01机器人:layout_height =WRAP_CONTENT机器人:ID =@ + ID / LOCATION_NAME
机器人:TEXTSIZE =15px的机器人:layout_marginTop =10px的机器人:layout_width =WRAP_CONTENT>< / TextView的>
< TextView的Android版本:文本=|机器人:layout_height =WRAP_CONTENT
机器人:TEXTSIZE =15px的机器人:layout_marginTop =6px机器人:layout_width =WRAP_CONTENT>< / TextView的>
< TextView的Android版本:文本=@ + ID / TextView01机器人:layout_height =WRAP_CONTENT机器人:ID =@ + ID / location_lat
机器人:TEXTSIZE =15px的机器人:layout_marginTop =6px机器人:layout_width =WRAP_CONTENT>< / TextView的>
< TextView的Android版本:文本=| $机器人:layout_height =WRAP_CONTENT
机器人:TEXTSIZE =15px的机器人:layout_marginTop =6px机器人:layout_width =WRAP_CONTENT>< / TextView的>
< TextView的Android版本:文本=@ + ID / TextView01机器人:layout_height =WRAP_CONTENT机器人:ID =@ + ID / location_lon
机器人:TEXTSIZE =15px的机器人:layout_marginTop =6px机器人:layout_width =WRAP_CONTENT>< / TextView的>
< / LinearLayout中>
正如我们在http://developer.android.com/reference/android/widget/ArrayAdapter.htmlArrayAdapter只是工作与textviews字符串。您可以使用此构造
ArrayAdapter(上下文的背景下,INT资源,INT textViewResourceId,名单,其中,T>对象)
specifyng一个TextView的id布局或覆盖
里面 getView(廉政,查看,ViewGroup中)
返回您的自定义类型的视图。
What does this mean? I have been fighting with this ListView
that I have using an ArrayAdapter
. I wrote this nice dialog fragment that I have calling back to an updateUI listner cause I want to update this ListView
I have in my fragment from the DialogFragment
at first the ArrayAdapter
was a complex type of a class i Created:
ArrayAdapter<Location> theLocations;
...
//in oncreateview
theLocations = new ArrayAdapter<Location>(mContext, R.layout.location_row, locations);
//here locations is an ArrayList<Location>
then I have:
public void onUIUpdate(Location l) { //called from dialog fragment
locations.add(l);
theLocations.notifyDataSetChanged();
}
then that gave the above error so I switched it to use just a
String[] locationNames = new String[sizeofLocations];
theLocations=new ArrayAdapter<String>(mContext, R.layout.location_Row, locationNames );
public void onUIUpdate(Location l) {
locations.add(l);
locationNames = new String[locations.size()];
for(locations.size() etc...) {
locationNames [i] = new String(locations.get(i).getName());
}
theLocations.notifyDataSetChanged();
}
this didn't error out in my update method (That updates the ui) but it didn't update anything. So I am lost as to how to update this ArrayAdapter, I thought notifyChange was supposed to do it, but it either does nothing or throws the above error.
I have no issues with my SimpleCursorAdapters elsewhere in my program (As long as my cursors remain open and i call a requery on them).
Any insights into what I am doing wrong?
Upon request here is my layout for the R.layout.location_row
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content" android:layout_width="fill_parent" android:orientation="horizontal">
<TextView android:text="@+id/TextView01" android:layout_height="wrap_content" android:id="@+id/location_name"
android:textSize="15px" android:layout_marginTop="10px" android:layout_width="wrap_content"></TextView>
<TextView android:text="|" android:layout_height="wrap_content"
android:textSize="15px" android:layout_marginTop="6px" android:layout_width="wrap_content"></TextView>
<TextView android:text="@+id/TextView01" android:layout_height="wrap_content" android:id="@+id/location_lat"
android:textSize="15px" android:layout_marginTop="6px" android:layout_width="wrap_content"></TextView>
<TextView android:text="|$" android:layout_height="wrap_content"
android:textSize="15px" android:layout_marginTop="6px" android:layout_width="wrap_content"></TextView>
<TextView android:text="@+id/TextView01" android:layout_height="wrap_content" android:id="@+id/location_lon"
android:textSize="15px" android:layout_marginTop="6px" android:layout_width="wrap_content"></TextView>
</LinearLayout>
As we can read in http://developer.android.com/reference/android/widget/ArrayAdapter.htmlArrayAdapter just works with strings on textviews. You can use this constructor
ArrayAdapter(Context context, int resource, int textViewResourceId, List<T> objects)
specifyng the id of a TextView inside your layout or override
getView(int, View, ViewGroup)
returning a view of your custom type.
这篇关于错误:ArrayAdapter需要的资源ID是一个TextView的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!