NullPointerException android.widget.ArrayAdapter.init（ArrayAdapter.java）只是将Arraylist值添加到customAdapter类中并将这些值设置为listview，请参阅下面的代码helpm me
我的logcat错误：
01-22 14:50:46.049: E/i(26881): بعد بهش میگن با نجیب جمله بساز :میگه یدونه کت دارم نه جیب داره نه دکمه...!!
01-22 14:50:46.049: E/i(26881): به یک نفر میگن با جام جم جمله بساز میگه :مامان بیا جامو جم کن...
01-22 14:50:46.049: W/dalvikvm(26881): threadid=1: thread exiting with uncaught exception (group=0x417e9a08)
01-22 14:50:46.059: E/AndroidRuntime(26881): FATAL EXCEPTION: main
01-22 14:50:46.059: E/AndroidRuntime(26881): java.lang.NullPointerException
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.widget.ArrayAdapter.init(ArrayAdapter.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.widget.ArrayAdapter.<init>(ArrayAdapter.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at it.gmariotti.cardslib.library.internal.CardArrayAdapter.<init>(CardArrayAdapter.java:116)
01-22 14:50:46.059: E/AndroidRuntime(26881): at ir.reza.smss.Fragments.TabFragment1.populateSpinner(TabFragment1.java:75)
01-22 14:50:46.059: E/AndroidRuntime(26881): at ir.reza.smss.GetCategories.onPostExecute(GetCategories.java:88)
01-22 14:50:46.059: E/AndroidRuntime(26881): at ir.reza.smss.GetCategories.onPostExecute(GetCategories.java:1)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.os.AsyncTask.finish(AsyncTask.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.os.AsyncTask.access$600(AsyncTask.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.os.Handler.dispatchMessage(Handler.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.os.Looper.loop(Looper.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at android.app.ActivityThread.main(ActivityThread.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at java.lang.reflect.Method.invokeNative(Native Method)
01-22 14:50:46.059: E/AndroidRuntime(26881): at java.lang.reflect.Method.invoke(Method.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
01-22 14:50:46.059: E/AndroidRuntime(26881): at dalvik.system.NativeStart.main(Native Method)
这是TabFragment1：
package ir.reza.smss.Fragments;
import ir.reza.smss.Category;
import ir.reza.smss.GetCategories;
import ir.reza.smss.GooglePlaySmallCard;
import ir.reza.smss.R;
import ir.reza.smss.ServiceHandler;
import it.gmariotti.cardslib.library.internal.Card;
import it.gmariotti.cardslib.library.internal.CardArrayAdapter;
import it.gmariotti.cardslib.library.view.CardListView;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.annotation.SuppressLint;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.actionbarsherlock.app.SherlockFragment;
@SuppressLint("ValidFragment")
public class TabFragment1 extends SherlockFragment {
// array list for spinner adapter
ProgressDialog pDialog;
// Url to get all categories
private String URL_CATEGORIES = "http://varzesh-ilam.xzn.ir/app/get_categories.php";
public static ArrayList<Category> categoriesList;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_tab_1, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
GetCategories webServiceTask = new GetCategories(this.getActivity());
webServiceTask.execute();
}
public void populateSpinner() {
ArrayList<Card> cards = new ArrayList<Card>();
for (int i = categoriesList.size()-1; i >= 0; --i) {
GooglePlaySmallCard card = new GooglePlaySmallCard(this.getActivity());
card.setTitle(categoriesList.get(i).getName());
card.count=i;
Log.e("i", categoriesList.get(i).getName());
cards.add(card);
}
CardArrayAdapter mCardArrayAdapter = new CardArrayAdapter(getActivity(),cards);
CardListView listView = (CardListView) getActivity().findViewById(R.id.carddemo_list_gplaycard);
if (listView!=null){
listView.setAdapter(mCardArrayAdapter);
}
}
}
这是GetCategories：
package ir.reza.smss;
import ir.reza.smss.Fragments.TabFragment1;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
public class GetCategories extends AsyncTask<Void, Void, Void> {
private Context context;
ProgressDialog pDialog;
// Url to get all categories
private String URL_CATEGORIES = "http://varzesh-ilam.xzn.ir/app/get_categories.php";
public GetCategories(Context context) {
this.context = context;
TabFragment1.categoriesList = new ArrayList<Category>();
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(context);
pDialog.setMessage("Loading...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
ServiceHandler jsonParser = new ServiceHandler();
String json = jsonParser.makeServiceCall(URL_CATEGORIES, ServiceHandler.GET);
Log.e("Response: ", "> " + json);
if (json != null) {
try {
JSONObject jsonObj = new JSONObject(json);
if (jsonObj != null) {
JSONArray categories = jsonObj
.getJSONArray("categories");
for (int i = 0; i < categories.length(); i++) {
JSONObject catObj = (JSONObject) categories.get(i);
Category cat = new Category(catObj.getInt("id"),
catObj.getString("name"));
TabFragment1.categoriesList.add(cat);
Log.e("categories", "sakhte shod loop ham por shod");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("JSON Data", "Didn't receive any data from server!");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
TabFragment1 tb1 = new TabFragment1();
tb1.populateSpinner();
}
}
我在Android开发新手请帮我代码请帮忙.......