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我使用arrayadapter顯示了一個listview。對於每個listitem我膨脹相同的XML文件。我能夠顯示列表視圖fine.but現在我有另一個要求。我想以編程方式添加一些更多的視圖到我爲每個列表項目充氣的同一個xml文件。但是當我嘗試這樣做時,我沒有收到任何錯誤。但不知何故,我以編程方式添加的視圖沒有顯示出來......任何人都可以請幫助我。以下是XML佈局和一個ArrayAdapter通過陣列適配器以編程方式添加視圖
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/placeholder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/listitemcolor"
android:padding="10dip">
<LinearLayout
android:layout_weight="1.0"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:textColor="@android:color/black"
android:id="@+id/locationitem_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Medium Text"
android:textSize="16dp"
android:textStyle="bold" />
<LinearLayout
android:layout_marginTop="5dip"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:drawableLeft="@drawable/like"
android:textColor="#008000"
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Likes"
android:textSize="12dp"
android:textStyle="bold" />
<TextView
android:textColor="#008000"
android:layout_marginLeft="5dip"
android:id="@+id/number_of_likes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="15"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:drawableLeft="@drawable/dislike"
android:textColor="#FF0000"
android:layout_marginLeft="10dip"
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dislikes"
android:textSize="12dp"
android:textStyle="bold" />
<TextView
android:textColor="#FF0000"
android:layout_marginLeft="5dip"
android:id="@+id/number_of_dislikes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="8"
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
代碼這是arrayadapter代碼:
public class LocationItemAdapter extends ArrayAdapter<LocationItem> {
private Context context;
private ArrayList<LocationItem> items;
public LocationItemAdapter(Context context,
List<LocationItem> objects) {
super(context, R.layout.locationitem_listview_element, objects);
this.context = context;
items = (ArrayList<LocationItem>) objects;
}
/* (non-Javadoc)
* @see android.widget.ArrayAdapter#getView(int, android.view.View, android.view.ViewGroup)
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowview = null;
if(convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rowview = inflater.inflate(R.layout.locationitem_listview_element, null);
}
else
{
rowview = convertView;
}
((TextView)rowview.findViewById(R.id.locationitem_name)).setText(items.get(position).getName());
((TextView)rowview.findViewById(R.id.number_of_likes)).setText(String.valueOf(items.get(position).getLikes()));
((TextView)rowview.findViewById(R.id.number_of_dislikes)).setText(String.valueOf(items.get(position).getDislikes()));
LayoutInflater inflater1 = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
TextView tv = new TextView(context);
//TextView tv = (TextView)inflater1.inflate(R.layout.sample, null);
tv.setText("My name is blah");
tv.setTextColor(R.color.black);
tv.setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT));
//tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
LinearLayout ll = (LinearLayout)rowview.findViewById(R.id.placeholder);
//((LinearLayout)rowview.findViewById(R.id.placeholder)).addView(tv);
ll.addView(tv);
rowview.setTag(items.get(position));
return rowview;
}
}
我已經添加了另一個linearlayout作爲佔位符(linearlayout)的直接子對象。我給它的佈局權重爲「0.3」,然後將textview添加到它,但仍然沒有顯示:(:( – vivek 2012-08-11 06:25:37
我認爲問題出現在您的佈局xml中,但不知道究竟是什麼問題。 – Nick 2012-08-11 06:29:44
我已經檢查了hierarchyviewer工具也.. textview不存在也因此我猜嵌入本身沒有發生,但爲什麼? – vivek 2012-08-11 06:32:27