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私はアンドロイドを初めて使うので、私は友人とオンラインで見つけたいくつかのチュートリアルの助けを借りて自分のタブアクティビティを実装しました。しかし、次のタブに移動しようとすると、エラーがスローされます。私はそれを見て、何が起こっているのか、私がここで間違っているのか理解できません。フラグメントにナビゲートするとアプリケーションがクラッシュする
これは私のAndroidのモニターに表示されるエラーです：
03-29 19:20:55.958 1544-1544/com.xxxxxx.eventmanager E/Trace: error opening trace file: No such file or directory (2)
03-29 19:36:25.011 1544-19421/com.xxxxxx.eventmanager E/CursorWindow: Failed to read row 0, column -1 from a CursorWindow which has 199 rows, 18 columns.
03-29 19:36:25.031 1544-19421/com.xxxxxx.eventmanager E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #3
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.database.CursorWindow.nativeGetString(Native Method)
at android.database.CursorWindow.getString(CursorWindow.java:434)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
at com.xxxxxx.eventmanager.models.InvoiceModel.get(InvoiceModel.java:129)
at com.xxxxxx.eventmanager.fragments.EventPurchasesFragment$InvoiceAsync.doInBackground(EventPurchasesFragment.java:132)
at com.xxxxxx.eventmanager.fragments.EventPurchasesFragment$InvoiceAsync.doInBackground(EventPurchasesFragment.java:106)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
03-29 19:36:25.981 1544-1544/com.xxxxxx.eventmanager E/WindowManager: Activity com.xxxxxx.eventmanager.EventDetailsActivity has leaked window [email protected] that was originally added here
android.view.WindowLeaked: Activity com.xxxxxx.eventmanager.EventDetailsActivity has leaked window [email protected] that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
at android.view.Window$LocalWindowManager.addView(Window.java:547)
at android.app.Dialog.show(Dialog.java:277)
at com.xxxxxx.eventmanager.fragments.EventPurchasesFragment$InvoiceAsync.onPreExecute(EventPurchasesFragment.java:122)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
at com.xxxxxx.eventmanager.fragments.EventPurchasesFragment.onStart(EventPurchasesFragment.java:69)
at android.support.v4.app.Fragment.performStart(Fragment.java:2000)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1102)
at android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:926)
at android.support.v4.app.FragmentManagerImpl.startPendingDeferredFragments(FragmentManager.java:1276)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1634)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:570)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:164)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1177)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:608)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:570)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:551)
at com.xxxxxx.eventmanager.EventDetailsActivity$1.onTabSelected(EventDetailsActivity.java:57)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1024)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:994)
at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1262)
at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1360)
at android.view.View$PerformClick.run(View.java:16966)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
これは私のフラグメントの活動です：
package com.xxxxxx.eventmanager.fragments;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.xxxxxx.eventmanager.EventDetailsActivity;
import com.xxxxxx.eventmanager.R;
import com.xxxxxx.eventmanager.adapters.InvoiceBaseAdapter;
import com.xxxxxx.eventmanager.models.InvoiceModel;
import com.xxxxxx.eventmanager.objects.Invoice;
import java.util.ArrayList;
import java.util.List;
/**
* Created by djoks on 22/03/2016.
*/
public class EventPurchasesFragment extends Fragment {
// Shared Preferences
SharedPreferences settings;
Context context;
View view;
InvoiceModel im;
//Array Adapter that will hold our ArrayList and display the items on the ListView
InvoiceBaseAdapter adapter;
List<Invoice> il;
ListView invoiceListView;
Invoice io;
InvoiceBroadcastReceiver receiver;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_event_purchases, container, false);
this.context = container.getContext();
this.im = new InvoiceModel(context);
this.io = new Invoice();
return view;
}
@Override
public void onStart() {
super.onStart();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
new InvoiceAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
}else{
new InvoiceAsync().execute();
}
invoiceListView = (ListView) view.findViewById(R.id.invoiceListView);
invoiceListView.setFocusable(false);
invoiceListView.setClickable(true);
invoiceListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
/*TextView eventIdView = (TextView) view.findViewById(R.id.eventIdView);
int eventId = Integer.parseInt(eventIdView.getText().toString());
Intent i = new Intent(context, EventDetailsActivity.class);
i.putExtra("eventId", eventId);
startActivity(i);*/
}
});
}
@Override
public void onResume() {
super.onResume();
IntentFilter filter = new IntentFilter("com.xxxxxx.eventmanager.UPDATE_INVOICE_DATASOURCE");
receiver = new InvoiceBroadcastReceiver();
context.registerReceiver(receiver, filter);
}
@Override
public void onPause() {
super.onPause();
context.unregisterReceiver(receiver);
}
private class InvoiceAsync extends AsyncTask<Void, Void, ArrayList<Invoice>> {
ProgressDialog pd;
InvoiceModel im;
String msg = "";
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
if (pd == null) {
pd = new ProgressDialog(context);
pd.setMessage("Loading Invoices");
pd.setIndeterminate(true);
pd.setCancelable(true);
pd.setCanceledOnTouchOutside(false);
pd.show();
}
}
@Override
protected ArrayList<Invoice> doInBackground(Void... params) {
// TODO Auto-generated method stub
InvoiceModel im = new InvoiceModel(context);
return im.get();
}
@Override
protected void onPostExecute(ArrayList<Invoice> result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if(pd.isShowing()){
pd.dismiss();
}
if(result !=null && result.size() > 0){
adapter = new InvoiceBaseAdapter(context, result);
invoiceListView.setAdapter(adapter);
invoiceListView.setTextFilterEnabled(true);
adapter.notifyDataSetChanged();
} else {
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}
}
}
private class InvoiceBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
new InvoiceAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
}else{
new InvoiceAsync().execute();
}
}
}
}
これは私がSQLiteDatabaseトランザクションを処理する私のモデルである：
package com.xxxxxx.eventmanager.models;
import android.content.ContentValues;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import com.xxxxxx.eventmanager.database.LocalDBDataSource;
import com.xxxxxx.eventmanager.objects.Event;
import com.xxxxxx.eventmanager.objects.Invoice;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
/**
* Created by djoks on 28/03/2016.
*/
public class InvoiceModel {
Context context;
SQLiteDatabase db;
SharedPreferences settings;
AppModel app;
public InvoiceModel(Context c) {
super();
this.context = c;
this.settings = c.getSharedPreferences("App", context.MODE_PRIVATE);
this.app = new AppModel(c);
}
private void insert(Invoice i) {
ContentValues cv = new ContentValues();
cv.put("invoice_id", i.getInvoiceId());
cv.put("type", i.getType());
cv.put("vendor_id", i.getVendorId());
cv.put("vendor_name", i.getVendorName());
cv.put("reference_code", i.getReferenceCode());
cv.put("total_no_of_tickets", i.getTotalNoOfTickets());
cv.put("total_tickets_amount", i.getTotalTicketsAmount());
cv.put("total_extras_amount", i.getTotalExtrasAmount());
cv.put("total_amount_billed", i.getTotalAmountBilled());
cv.put("total_charges_applied", i.getTotalChargesApplied());
cv.put("total_discounts_applied", i.getTotalDiscountsApplied());
cv.put("customer", i.getCustomerDetails().toString());
cv.put("tickets", i.getTicketsPurchased().toString());
cv.put("extras", i.getExtrasPurchased().toString());
cv.put("created_at", i.getCreatedAt());
cv.put("updated_at", i.getUpdatedAt());
cv.put("deleted_at", i.getDeletedAt());
db.insert("invoices", null, cv);
}
private void update(Invoice i){
String whereClause = "invoice_id = ?";
String[] whereParams = {String.valueOf(i.getInvoiceId())};
ContentValues cv = new ContentValues();
cv.put("invoice_id", i.getInvoiceId());
cv.put("type", i.getType());
cv.put("vendor_id", i.getVendorId());
cv.put("vendor_name", i.getVendorName());
cv.put("reference_code", i.getReferenceCode());
cv.put("total_no_of_tickets", i.getTotalNoOfTickets());
cv.put("total_tickets_amount", i.getTotalTicketsAmount());
cv.put("total_extras_amount", i.getTotalExtrasAmount());
cv.put("total_amount_billed", i.getTotalAmountBilled());
cv.put("total_charges_applied", i.getTotalChargesApplied());
cv.put("total_discounts_applied", i.getTotalDiscountsApplied());
cv.put("customer", i.getCustomerDetails().toString());
cv.put("tickets", i.getTicketsPurchased().toString());
cv.put("extras", i.getExtrasPurchased().toString());
cv.put("created_at", i.getCreatedAt());
cv.put("updated_at", i.getUpdatedAt());
cv.put("deleted_at", i.getDeletedAt());
db.update("invoices", cv, whereClause, whereParams);
}
public void save(Invoice i) {
db = LocalDBDataSource.getHelper(context).getWritableDatabase();
String whereClause = "invoice_id = ?";
String[] whereParams = {String.valueOf(i.getInvoiceId())};
String[] columns = {"*"};
Cursor c = null;
try{
c = db.query("invoices", columns, whereClause, whereParams, null, null, null);
if(c.getCount() > 0)
{
update(i);
} else{
insert(i);
}
} finally {
if(c != null && !c.isClosed()){
c.close();
}
if(db != null && db.isOpen()){
db.close();
}
}
}
public ArrayList<Invoice> get() {
db = LocalDBDataSource.getHelper(context).getWritableDatabase();
Cursor c = null;
String[] columns = {"*"};
ArrayList<Invoice> invoices = new ArrayList<Invoice>();
try{
c = db.query(false, "invoices", columns, null, null, null, null, null, null);
if(c.getCount() > 0){
while(c.moveToNext()){
invoices.add(new Invoice(
c.getInt(c.getColumnIndex("invoice_id")),
c.getString(c.getColumnIndex("type")),
c.getInt(c.getColumnIndex("vendor_id")),
c.getString(c.getColumnIndex("venue_name")),
c.getString(c.getColumnIndex("reference_code")),
c.getInt(c.getColumnIndex("total_no_of_tickets")),
c.getFloat(c.getColumnIndex("total_tickets_amount")),
c.getFloat(c.getColumnIndex("total_extras_amount")),
c.getFloat(c.getColumnIndex("total_amount_billed")),
c.getFloat(c.getColumnIndex("total_charges_applied")),
c.getFloat(c.getColumnIndex("total_discounts_applied")),
new JSONObject(c.getString(c.getColumnIndex("customer"))),
new JSONArray(c.getString(c.getColumnIndex("tickets"))),
new JSONArray(c.getString(c.getColumnIndex("extras"))),
c.getString(c.getColumnIndex("created_at")),
c.getString(c.getColumnIndex("updated_at")),
c.getString(c.getColumnIndex("deleted_at"))
));
}
}
} catch (JSONException e) {
e.printStackTrace();
} finally{
if (c !=null && !c.isClosed()) {
c.close();
}
if(db!=null && db.isOpen()) {
db.close();
}
}
return invoices.size() > 0 ? invoices : new ArrayList<Invoice>();
}
}
ありがとうございました！私はそれをまったく気付かなかった！しかし、なぜSQLiteは私に "Column Not Found"のようなデータベース固有のエラーを与えませんか？なぜ私の活動ウィンドウが漏れているのかを調べるのに多くの時間を費やしました。 – user3718908
データベースを処理するために低レベルのAPIを使用しているため、何をしているのかを知っていなければなりません。ドキュメントが示唆するように、getColumnIndexOrThrowを使用できました。上から始まる常に完全なスタックトレースを読む – Markon