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所以我有一個基礎適配器類，我建立。我也嘗試在我的一項活動中使用它。我有一個用於父佈局的xml和用於膨脹的行的xml。但是，這些組件不能鏈接在一起。該應用程序不會崩潰，但行不膨脹（儘管母版xml文件仍顯示在屏幕上）。可以看看我的代碼並告訴我我忽略了哪些關鍵組件？我只會發布相關的代碼。無法發佈錯誤日誌，因爲沒有發生錯誤。非常感謝BaseAdapter not populating listview
父XML（nearby_places_list）
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:orientation="vertical"
android:background="@drawable/bg">
<Button
android:id="@+id/continuetomap"
android:layout_height="100dp"
android:layout_width="match_parent"
android:background="@drawable/map_continue"
/>
<ListView
android:id="@+id/list_view_nearby"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#b5b5b5"
android:listSelector="@drawable/list_selector">
</ListView>
</LinearLayout>
行膨脹XML（nearby_list_row）
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp"
android:orientation="vertical"
android:background="@drawable/list_selector">"
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="@drawable/list_selector">
<LinearLayout
android:layout_width="0dp"
android:layout_weight="3"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="@drawable/list_selector">
<TextView
android:id= "@+id/name"
android:textSize="20dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="name"
android:textColor="#54944d"/>
<TextView
android:id= "@+id/vicinity"
android:textSize="20dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="vicinity"
android:textColor="#000000"/>
<TextView
android:id= "@+id/openorclosed"
android:textSize="20dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Open"
android:textColor="#000000"
android:textStyle="bold"/>
</LinearLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.74" >
<Button
android:layout_width="60dp"
android:id="@+id/button_add_to_fav"
android:background="@drawable/add_square"
android:layout_height="60dp"
android:layout_alignParentRight="true"
/>
<Button
android:layout_width="60dp"
android:id="@+id/button_call_rest"
android:background="@drawable/add_square"
android:layout_height="60dp"
android:layout_alignParentRight="true"
android:layout_below="@+id/button_add_to_fav"
/>
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
底座適配器類
public class AdapterForList extends BaseAdapter {
private final Context context;
private final ArrayList<HashMap<String, String>> alHm;
private final String TAG_A;
private final String TAG_B;
private final String TAG_C;
public AdapterForList(Context context, ArrayList<HashMap<String, String>> alhm, String TAG_1, String TAG_2, String TAG_3) {
super();
this.context = context;
this.alHm = alhm;
TAG_A = TAG_1;
TAG_B = TAG_2;
TAG_C = TAG_3;
}
@Override
public View getView(int position, View convertView , ViewGroup parent){
LayoutInflater inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflator.inflate(R.layout.nearby_list_row, parent, false);
TextView tv1 = (TextView) convertView.findViewById(R.id.name);
TextView tv2 = (TextView) convertView.findViewById(R.id.vicinity);
TextView tv3 = (TextView) convertView.findViewById(R.id.openorclosed);
Button btnAdd= (Button) convertView.findViewById(R.id.button_add_to_fav);
Button btnCall= (Button) convertView.findViewById(R.id.button_call_rest);
if (alHm.get(position).containsKey(TAG_A)){ // get the value from the key (if it exist) and set the first text view to it
String value = alHm.get(position).get(TAG_A);
tv1.setText(value);;
}
if (alHm.get(position).containsKey(TAG_B)){
String value = alHm.get(position).get(TAG_B);
tv2.setText(value);;
}
if (alHm.get(position).containsKey(TAG_C)){ // get the value from the key (if it exist) and set the first text view to it
String value = alHm.get(position).get(TAG_C);
tv3.setText(value);;
}
return convertView;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return alHm.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
}
相關活動代碼
protected void onPostExecute(Boolean result){
if (result){
// adding data to listview
final ListView lv = (ListView) findViewById(R.id.list_view_nearby);
lv.setAdapter(new AdapterForList(context, listOfHM, JSONextractor.TAG_NAME,
JSONextractor.TAG_VICINITY, JSONextractor.TAG_OPERATINGHOURS_OPENNOW));
//more code ...
}
}
你在AdapterForList構造記錄的alhm的ArrayList大小試過嗎？因爲如果是空的多數民衆贊成在問題... – sabadow
阿爾姆有正確的計數爲20，其中的值是正確的。正確的listview也被找到 –
WTF？！？！它現在工作正常。我還沒有改變一行代碼。我已經運行這個並在調試器中多次遍歷這個 –