我的进口
import java.util.ArrayList;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.dwellesque.R;
import com.dwellesque.util.Extraadap;
import com.dwellesque.util.XMLfunctions;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class LoginsearchResult extends Fragment{
查看创建方法
public LoginsearchResult()
{
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView;
String data=null;
rootView = inflater.inflate(R.layout.loginsearchresult,container,false);
txtType = (TextView) rootView.findViewById(R.id.logintype);
lstJobs= (ListView) rootView.findViewById(R.id.loginlist);
lstJobs.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
showdata(data);
return rootView;
}
呼叫清单适配器
Extraadap adapter= new Extraadap(getActivity(),strimage, strname, loc, square, price,strposted);
lstJobs.setAdapter(adapter);
Extraadap class
public class Extraadap extends ArrayAdapter<String>{
ImageView imgProperty;
TextView txtposted;
TextView txtStreetName;
TextView txtLocation;
TextView txtSquareFotage;
TextView txtPrice;
ImageView imglike;
Context context;
String[] strimgview,strstreetname,strLocation,strSquarefootage,strPrice,strPosted;
public ImageLoader imageLoader;
public Extraadap(Context context,String[] strimgview, String[] strstreetname, String[] strLocation,
String[] strSquarefootage, String[] strPrice,String[] strPosted)
{
super(context, R.layout.propertyrow,strstreetname);
this.context= context;
this.strimgview= strimgview;
this.strstreetname= strstreetname;
this.strLocation= strLocation;
this.strSquarefootage= strSquarefootage;
this.strPrice= strPrice;
this.strPosted= strPosted;
imageLoader = new ImageLoader(context);
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View row;
row=mInflater.inflate(R.layout.propertyrow, parent,false);
imgProperty =(ImageView) row.findViewById(R.id.npTupleImage);
txtStreetName= (TextView) row.findViewById(R.id.npTupleProjectName);
txtLocation= (TextView) row.findViewById(R.id.npTupleBuilder);
txtSquareFotage= (TextView) row.findViewById(R.id.npTupleProjectAddress);
txtPrice =(TextView) row.findViewById(R.id.npTupleProjectDistance);
txtposted =(TextView) row.findViewById(R.id.npTuplePossession);
imglike= (ImageView) row.findViewById(R.id.unsavebtn);
txtposted.setText("EnteredDate :"+strPosted[position]);
txtStreetName.setText("Street Name :"+strstreetname[position]);
txtLocation.setText("Location :"+strLocation[position]);
txtSquareFotage.setText("SquareFootage :"+strSquarefootage[position]);
txtPrice.setText("Price :$"+strPrice[position]);
Log.d("Img",strimgview[position]);
try{
imageLoader.DisplayImage(strimgview[position], imgProperty);
Log.d("imageUrl", strimgview[position]);
}
catch(Exception e)
{
Toast.makeText(context, "Load"+e, Toast.LENGTH_LONG).show();
}
imglike.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(context, "Want to save", Toast.LENGTH_LONG).show();
}
});
return row;
}
}
当我调用LoginsearchResult碎片类时，应用程序崩溃
我的LogCat
04-16 15:03:14.815: E/AndroidRuntime(1956): FATAL EXCEPTION: main
04-16 15:03:14.815: E/AndroidRuntime(1956):
java.lang.NullPointerException 04-16 15:03:14.815:
E/AndroidRuntime(1956): at
com.dwellesque.LoginsearchResult.showdata(LoginsearchResult.java:249)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
com.dwellesque.LoginsearchResult.onCreateView(LoginsearchResult.java:57)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
android.app.FragmentManagerImpl.moveToState(FragmentManager.java:829)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
android.app.BackStackRecord.run(BackStackRecord.java:635) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1397)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
android.app.FragmentManagerImpl$1.run(FragmentManager.java:426) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
android.os.Handler.handleCallback(Handler.java:615) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
android.os.Handler.dispatchMessage(Handler.java:92) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
android.os.Looper.loop(Looper.java:137) 04-16 15:03:14.815:
E/AndroidRuntime(1956): at
android.app.ActivityThread.main(ActivityThread.java:4745) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
java.lang.reflect.Method.invokeNative(Native Method) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
java.lang.reflect.Method.invoke(Method.java:511) 04-16 15:03:14.815:
E/AndroidRuntime(1956): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-16 15:03:14.815: E/AndroidRuntime(1956): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 04-16
15:03:14.815: E/AndroidRuntime(1956): at
dalvik.system.NativeStart.main(Native Method) 04-16 15:03:16.616:
E/Trace(1984): error opening trace file: No such file or directory
(2)
showdata（）方法
void showdata(String data)
{
doc = XMLfunctions.XMLfromString(data);
NodeList nodes = doc.getElementsByTagName("PROPERTY");
for (int i = 0; i < nodes.getLength(); i++) {
Element e = (Element) nodes.item(i);
// Street Name
if (!("null").equals(XMLfunctions.getValue(e, "street"))) {
mainList.add(XMLfunctions.getValue(e, "street"));
arliststitname.add(XMLfunctions.getValue(e, "street"));
} else {
mainList.add(" ");
}
// Location
if (!("null").equals(XMLfunctions.getValue(e, "city"))) {
if(!("null").equals(XMLfunctions.getValue(e, "state")))
{
mainList.add(XMLfunctions.getValue(e, "city")+" ,"+XMLfunctions.getValue(e, "state"));
arlistlocation.add(XMLfunctions.getValue(e, "city")+" ,"+XMLfunctions.getValue(e, "state"));
}
mainList.add(XMLfunctions.getValue(e, "city"));
arlistlocation.add(XMLfunctions.getValue(e, "city"));
} else {
mainList.add(" ");
}
// Square Footage
if (!("null").equals(XMLfunctions.getValue(e, "SquareFootage"))) {
mainList.add(XMLfunctions.getValue(e, "SquareFootage"));
arlistsqare.add(XMLfunctions.getValue(e, "SquareFootage"));
} else {
mainList.add(" ");
}
// price
if (!("null").equals(XMLfunctions.getValue(e, "price"))) {
mainList.add(XMLfunctions.getValue(e, "price"));
arlistprice.add(XMLfunctions.getValue(e, "price"));
} else {
mainList.add(" ");
}
// Images
if (!("null").equals(XMLfunctions.getValue(e, "picture"))) {
mainList.add(XMLfunctions.getValue(e, "picture"));
arlistimg.add(XMLfunctions.getValue(e, "picture"));
Log.d("imageUrlIf", XMLfunctions.getValue(e, "picture"));
} else {
Log.d("imageUrlelse",XMLfunctions.getValue(e, "picture"));
mainList.add("");
}
// posted on
if (!("null").equals(XMLfunctions.getValue(e, "EnteredDate"))) {
mainList.add(XMLfunctions.getValue(e, "EnteredDate"));
arlistposted.add(XMLfunctions.getValue(e, "EnteredDate"));
} else {
mainList.add("");
}
if (!("null").equals(XMLfunctions.getValue(e, "description"))) {
mainList.add(XMLfunctions.getValue(e, "description"));
arlistDesc.add(XMLfunctions.getValue(e, "description"));
} else {
mainList.add("");
}
if (!("null").equals(XMLfunctions.getValue(e, "propertystatus"))) {
mainList.add(XMLfunctions.getValue(e, "propertystatus"));
arlistproperty.add(XMLfunctions.getValue(e, "propertystatus"));
} else {
mainList.add("");
}
if (!("null").equals(XMLfunctions.getValue(e, "EnteredDate"))) {
mainList.add(XMLfunctions.getValue(e, "EnteredDate"));
arlistyear.add(XMLfunctions.getValue(e, "EnteredDate"));
} else {
mainList.add("");
}
//URL
if (!("null").equals(XMLfunctions.getValue(e, "url"))) {
mainList.add(XMLfunctions.getValue(e, "url"));
arlisturl.add(XMLfunctions.getValue(e, "url"));
} else {
mainList.add("");
}
}
strposted = new String[arlistposted.size()];
strposted = arlistposted.toArray(strposted);
strname = new String[arliststitname.size()];
strname = arliststitname.toArray(strname);
loc = new String[arlistlocation.size()];
loc = arlistlocation.toArray(loc);
square = new String[arlistsqare.size()];
square = arlistsqare.toArray(square);
price = new String[arlistprice.size()];
price = arlistprice.toArray(price);
strimage = new String[arlistimg.size()];
strimage = arlistimg.toArray(strimage);
strpStatus = new String[arlistproperty.size()];
strpStatus = arlistproperty.toArray(strpStatus);
strDesc = new String[arlistDesc.size()];
strDesc = arlistDesc.toArray(strDesc);
strYear = new String[arlistyear.size()];
strYear = arlistyear.toArray(strYear);
// int currentPosition =lstJobs.getFirstVisiblePosition();
// List Adapter
Extraadap adapter= new Extraadap(getActivity(),strimage, strname, loc, square, price,strposted);
lstJobs.setAdapter(adapter);
// Log.d("List",""+e);
// Toast.makeText(getActivity(), "ss"+e, Toast.LENGTH_LONG).show();
//tSelectionFromTop(currentPosition, 0);
}
Listview布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg" >
<LinearLayout
android:id="@+id/top"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:background="#F0F0F0">
<TextView
android:layout_marginTop="0dip"
android:id="@+id/logintype"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:textStyle="bold"
android:textSize="18sp"
android:text="TextView" />
</LinearLayout>
<ListView
android:id="@+id/loginlist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/top" >
</ListView>
</RelativeLayout>
请帮助我如何解决这个问题
提前致谢。
答案 0 :(得分：1)
首先纠正这个
lstJobs= (ListView) rootView.findViewById(android.R.id.list);
到
lstJobs= (ListView) rootView.findViewById(R.id.list);
并确保ListView布局中的list loginsearchresult.xml lstJobs= (ListView) rootView.findViewById(R.id.loginlist);
更新：试试这个
{{1}}