पर Parse
से कक्षा लोड करने का प्रयास करने का प्रयास, हालांकि ऐप जल्द ही क्रैश हो जाता है I इसे लॉन्च करें! यहाँ कोड है:java.lang.NullPointerException: वर्चुअल विधि 'java.io.File com.parse.ParsePlugins.getParseDir()' को एक शून्य ऑब्जेक्ट संदर्भ
ListView listview;
List<ParseObject> ob;
ProgressDialog mProgressDialog;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_big_board);
new RemoteDataTask().execute();
}
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(BigBoard.this);
mProgressDialog.setTitle("Parse.com Simple ListView Tutorial");
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// Locate the class table named "Country" in Parse.com
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
"Country");
query.orderByDescending("_created_at");
try {
ob = query.find();
} catch (ParseException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.listview);
// Pass the results into an ArrayAdapter
adapter = new ArrayAdapter<String>(BigBoard.this,
R.layout.listview_item);
// Retrieve object "name" from Parse.com database
for (ParseObject country : ob) {
adapter.add((String) country.get("Name"));
}
// Binds the Adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
// Capture button clicks on ListView items
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// Send single item click data to SingleItemView Class
Intent i = new Intent(BigBoard.this,
SingleItemView.class);
// Pass data "name" followed by the position
i.putExtra("name", ob.get(position).getString("name")
.toString());
// Open SingleItemView.java Activity
startActivity(i);
}
});
}
}
और यही मैं logcat में प्राप्त है:
> 10-22 20:40:18.705 12588-12872/obx.com.futurister E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #3
Process: obx.com.futurister, PID: 12588
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:309)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File com.parse.ParsePlugins.getParseDir()' on a null object reference
at com.parse.Parse.getParseDir(Parse.java:315)
at com.parse.ParseCorePlugins.getCurrentUserController(ParseCorePlugins.java:129)
at com.parse.ParseUser.getCurrentUserController(ParseUser.java:55)
at com.parse.ParseUser.getCurrentUserAsync(ParseUser.java:888)
at com.parse.ParseQuery.getUserAsync(ParseQuery.java:938)
at com.parse.ParseQuery$3.call(ParseQuery.java:1196)
at com.parse.ParseQuery$3.call(ParseQuery.java:1193)
at com.parse.ParseQuery.doWithRunningCheck(ParseQuery.java:1132)
at com.parse.ParseQuery.findAsync(ParseQuery.java:1193)
at com.parse.ParseQuery.findInBackground(ParseQuery.java:1161)
at com.parse.ParseQuery.find(ParseQuery.java:981)
at obx.com.futurister.BigBoard$RemoteDataTask.doInBackground(BigBoard.java:66)
at obx.com.futurister.BigBoard$RemoteDataTask.doInBackground(BigBoard.java:44)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
10-22 20:40:18.857 12588-12619/obx.com.futurister E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xb3a1fb90
10-22 20:40:18.955 12588-12619/obx.com.futurister E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xa96acbb0
10-22 20:40:18.996 12588-12588/obx.com.futurister E/WindowManager﹕ android.view.WindowLeaked: Activity obx.com.futurister.BigBoard has leaked window com.android.internal.policy.PhoneWindow$DecorView{a0f50b2 V.E...... R......D 0,0-1026,538} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:368)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:299)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:319)
at obx.com.futurister.BigBoard$RemoteDataTask.onPreExecute(BigBoard.java:56)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:604)
at android.os.AsyncTask.execute(AsyncTask.java:551)
at obx.com.futurister.BigBoard.onCreate(BigBoard.java:40)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
doInBackground()
विधि के साथ अपने समस्या लगता है? क्या मैं कुछ भूल रहा हूँ? कृपया मदद करें, धन्यवाद
करने के लिए अपने अनुप्रयोग वर्ग को जोड़ने आप पार्स प्रारंभ कर दिया है? – Pztar
समझाओ कि आप इसके साथ क्या इरादा रखते थे? प्रारंभिक पार्स ऑब्जेक्ट? क्या आप यही पूछ रहे हैं? :/ – OBX
लाइन 66 वें या 44 वें ऑब्जेक्ट शून्य है ?? –