SQLite: ROWID nicht gefunden

Question

Ich erhalte einen Fehler, wenn ich nach Daten abfrage, die in eine andere Aktivität eingefügt werden sollen.

Das Hauptproblem ist, dass ich keine Ausgabe in meinem Stack-Trace bekomme und ein neuer Programmierer bin, ich kann nicht herausfinden, was passiert.

Ich bin neu in SQLite und verstehe nicht vollständig, wie die Abfragen funktionieren, so dass jede Hilfe geschätzt werden würde.

Das Problem tritt auf, wenn ich jemals auf ein Element in der Listview auf dem activity_main Layout klicken möchte.

Ich habe die onItemClickListener gesetzt, die Aktivität auf das edit_data Layout zu ändern und die EditText Felder mit den entsprechenden Daten aus der SQLite-Datenbank-Tabelle, wenn ein Element in der Liste zu füllen geklickt wird.

Aber wenn ich auf ein Element klicke, wird ein Toast gemacht, der besagt: "Keine ID, die mit diesem Namen verbunden ist".

Diese Toast-Nachricht ist in der App von mir selbst gebaut, so dass ich weiß, was diese Nachricht Toasten ist, aber ich weiß nicht warum.

Hier ist mein Code:

MainActivity.java

package com.TheAbstractLightbulb.cohen.not_at_homes_app; 


import android.app.Activity; 
import android.database.Cursor; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Window; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.content.Intent; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.Toast; 

import java.util.ArrayList; 


public class MainActivity extends Activity { 
    private static final String TAG = "MainActivity"; 
    DBHelper dbHelper; 

    public MainActivity() { 
    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     requestWindowFeature(Window.FEATURE_ACTION_BAR); 
     setContentView(R.layout.activity_main); 
     dbHelper = new DBHelper(this); 


     populateListView(); 
    } 

    public void toInputScreen(View view) { 
     Button addButton = (Button) findViewById(R.id.addButton); 
     addButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent1 = new Intent(MainActivity.this, InputPage.class); 
       startActivity(intent1); 
      } 
     }); 
    } 

    private void populateListView() { 
     Log.d(TAG, "populateListView: Displaying data in list view."); 
     final Cursor data = dbHelper.getData(); 
     ArrayList<String> listData = new ArrayList<>(); 
     while (data.moveToNext()) { 
      listData.add(data.getString(2)); 
     } 
     ListView listview = (ListView) findViewById(R.id.MainListView); 
     final ListAdapter adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, listData); 
     listview.setAdapter(adapter); 

     listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
       String map = adapterView.getItemAtPosition(i).toString(); 
       String name = adapterView.getItemAtPosition(i).toString(); 
       String date = adapterView.getItemAtPosition(i).toString(); 
       String notAtHomes = adapterView.getItemAtPosition(i).toString(); 
       Log.d(TAG, "onItemClick: You Clicked on " + notAtHomes); 

       Cursor data = dbHelper.getItemID(map, name, date, notAtHomes); 
       int itemID = -1; 
       while (data.moveToNext()) { 
        itemID = data.getInt(0); 
       } 
       if (itemID > -1) { 
        Log.d(TAG, "onItemClick: The ID is: " + itemID); 
        Intent editDataIntent = new Intent(MainActivity.this, EditData.class); 
        editDataIntent.putExtra("id", itemID); 
        editDataIntent.putExtra("map", map); 
        editDataIntent.putExtra("name", name); 
        editDataIntent.putExtra("date", date); 
        editDataIntent.putExtra("notAtHomes", notAtHomes); 
        startActivity(editDataIntent); 
       } else { 
        Toast.makeText(getBaseContext(), "No ID associated with that name", Toast.LENGTH_LONG).show(); 
       } 


      } 
     }); 
    } 
} 

EditData.java

package com.TheAbstractLightbulb.cohen.not_at_homes_app; 

import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 


/** 
* Created by cohen on 2/06/2017. 
*/ 

public class EditData extends Activity { 
    private static final String TAG = "EditData"; 

    DBHelper dbhelper; 

    private int selectedID; 
    private String selectedMap; 
    private String selectedName; 
    private String selectedDate; 
    private String selectedNotAtHomes; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.edit_data); 
     final Button saveButton2 = (Button)findViewById(R.id.saveButton2); 
     Button deleteButton1 = (Button)findViewById(R.id.deleteButton1); 
     final EditText textNotAtHomes2 = (EditText)findViewById(R.id.textNotAtHomes2); 
     final EditText mapNoDisplay2 = (EditText)findViewById(R.id.mapNoDisplay2); 
     final EditText dateDisplay2 = (EditText)findViewById(R.id.dateDisplay2); 
     final EditText ListName2 = (EditText)findViewById(R.id.ListName2); 
     DBHelper DB = new DBHelper(this); 

     Intent receivedIntent = getIntent(); 
     // ID 
     selectedID = receivedIntent.getIntExtra("id",-1); 
     // Map no 
     selectedMap = receivedIntent.getStringExtra("map"); 
     // Name 
     selectedName = receivedIntent.getStringExtra("name"); 
     // Date 
     selectedDate = receivedIntent.getStringExtra("date"); 
     // Not at homes note file 
     selectedNotAtHomes = receivedIntent.getStringExtra("notAtHomes"); 

     ListName2.setText(selectedName); 
     mapNoDisplay2.setText(selectedMap); 
     dateDisplay2.setText(selectedDate); 
     textNotAtHomes2.setText(selectedNotAtHomes); 

     saveButton2.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       String item1 = ListName2.getText().toString(); 
       String item2 = mapNoDisplay2.getText().toString(); 
       String item3 = dateDisplay2.getText().toString(); 
       String item4 = textNotAtHomes2.getText().toString(); 
       if (!item1.equals("")){ 
        if (!item2.equals("")){ 
         if (!item3.equals("")) { 
          if (!item4.equals("")) { 
           dbhelper.updateData(selectedID, item2, selectedMap, item1, selectedName, item3, selectedDate, item4, selectedNotAtHomes); 
          } else { 
           new AlertDialog.Builder(getBaseContext()) 
             .setTitle("emptyBoxes") 
             .setMessage("Some boxes have been left empty, /n" + 
               "are you sure you are done?") 
             .setNegativeButton("Cancel", null) 
             .setPositiveButton("Save", new DialogInterface.OnClickListener() { 
              @Override 
              public void onClick(DialogInterface dialog, int which) { 

              } 
             }).create().show(); 
          } 

         } 

         } 
        } 

       } 
      }); 

     deleteButton1.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       dbhelper.deleteData(selectedID, selectedMap, selectedName, selectedDate, selectedNotAtHomes); 
       Intent intent = new Intent(EditData.this, MainActivity.class); 
       startActivity(intent); 
       Toast.makeText(getBaseContext(), "Note Deleted successfully", Toast.LENGTH_LONG).show(); 
      } 
     }); 
     } 

     private void toSendNote(View view){ 
      Button sendButton = (Button)findViewById(R.id.sendButton); 
      sendButton.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Intent intent1 = new Intent(EditData.this, SendRecord.class); 
        intent1.putExtra("Note", selectedNotAtHomes); 
        startActivity(intent1); 
       } 
      }); 
     } 

    } 

DBHelper.java

package com.TheAbstractLightbulb.cohen.not_at_homes_app; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.util.Log; 

/** 
* Created by cohen on 31/05/2017. 
*/ 

public class DBHelper extends SQLiteOpenHelper { 
    public static final String DATABASE_NAME = "App_database.db"; 
    public static final String TABLE_NAME = "App_date_table"; 
    public static final String MAP_NO = "Map_no"; 
    public static final String LOCATION = "Location"; 
    public static final String DATE = "Date"; 
    public static final String NOTATHOMES = "Not_at_homes"; 
    public static final String ID = "ID"; 
    public static final String TAG = "DBHelper"; 


    public DBHelper(Context context) { 
     super(context, DATABASE_NAME, null, 1); 

    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     String createTable = "CREATE TABLE " + TABLE_NAME + "(ID INTEGER PRIMARY KEY AUTOINCREMENT, " + MAP_NO + " INTEGER, " + LOCATION + " TEXT, " + DATE + " INTEGER, " + NOTATHOMES + " TEXT)"; 
     db.execSQL(createTable); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 
     onCreate(db); 

    } 

    public boolean insertData(String Map_no, String Location, String Date, String Not_at_homes) { 
     SQLiteDatabase db = this.getWritableDatabase(); 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(MAP_NO, Map_no); 
     contentValues.put(LOCATION, Location); 
     contentValues.put(DATE, Date); 
     contentValues.put(NOTATHOMES, Not_at_homes); 

     Log.d(TAG, "addData: Adding " + Location + " to " + TABLE_NAME); 

     long result = db.insert(TABLE_NAME, null, contentValues); 
     if (result == -1) { 
      return false; 
     } else { 
      return true; 
     } 


    } 

    public Cursor getData() { 
     SQLiteDatabase db = this.getWritableDatabase(); 
     String query = "SELECT * FROM " + TABLE_NAME; 
     Cursor data = db.rawQuery(query, null); 
     return data; 
    } 

    public Cursor getItemID(String map, String location, String date, String notAtHomes) { 
     SQLiteDatabase db = this.getWritableDatabase(); 
     String query = "SELECT " + ID + " FROM " + TABLE_NAME + 
       " WHERE " + MAP_NO + " = '" + map + "' AND " + LOCATION + " = '" + location + 
       "' AND " + DATE + " = '" + date + "' AND " 
       + NOTATHOMES + " = '" + notAtHomes + "'"; 
     Cursor data = db.rawQuery(query, null); 
     return data; 
    } 

    public void updateData(int id,String newMapNo, String oldMapNo, String newLocation, String oldLocation, String newDate, String oldDate, String newNotAtHomes, String oldNotAtHomes){ 
     SQLiteDatabase db = this.getWritableDatabase(); 
     String query = "UPDATE " + TABLE_NAME + " SET " + MAP_NO + 
       " = '" + newMapNo + " WHERE " + ID + " = '" + id + "'" + 
       " AND " + MAP_NO + " = '" + oldMapNo + "'"+ LOCATION + 
       " = '" + newLocation + " WHERE " + ID + " = '" + id + "'" + 
       " AND " + LOCATION + " = '" + oldLocation + "'"+ DATE + 
       " = '" + newDate + " WHERE " + ID + " = '" + id + "'" + 
       " AND " + DATE + " = '" + oldDate + "'"+ NOTATHOMES + 
       " = '" + newNotAtHomes + " WHERE " + ID + " = '" + id + "'" + 
       " AND " + NOTATHOMES + " = '" + oldNotAtHomes + "'"; 
     Log.d(TAG, "updating: query: " + query); 
     Log.d(TAG, "updating: Setting map number, Location, Date and Not at homes to new values: Map number: " + 
       newMapNo + " Location: " + newLocation + " Date: " + 
       newDate + " Not at homes: " + newNotAtHomes); 
     db.execSQL(query); 
    } 

    public void deleteData(int id, String mapNo, String location, String date, String notAtHomes){ 
     SQLiteDatabase database = this.getWritableDatabase(); 
     String query = "DELETE FROM " + TABLE_NAME + " WHERE " 
       + ID + " + '" + id + "'" + " AND " + MAP_NO + " = '" + mapNo + "'" + 
       LOCATION + " = '" + location + "'" + DATE + " = '" + date + "'" + NOTATHOMES + 
       " = '" + notAtHomes + "'"; 
     Log.d(TAG, "deleting: query: " + query); 
     Log.d(TAG, "deleting: Deleting note with values: Map number: " + mapNo + " Location: " + location + " Created on: " + date + " With notes: " + notAtHomes + "."); 
     database.execSQL(query); 
    } 
} 

MainActivity XML

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="com.TheAbstractLightbulb.cohen.not_at_homes_app.MainActivity" 
    android:background="@color/BackgroundGrey"> 


    <Button 
     android:id="@+id/addButton" 
     android:layout_width="351dp" 
     android:layout_height="61dp" 
     android:layout_marginBottom="16dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="16dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="16dp" 
     android:layout_marginTop="449dp" 
     android:onClick="toInputScreen" 
     android:background="@drawable/buttons" 
     android:text="@string/ButtonAddButton" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.733" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="1.0" /> 

    <ListView 
     android:id="@+id/MainListView" 
     android:layout_width="336dp" 
     android:layout_height="521dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginTop="8dp" 
     android:divider="@color/blackText" 
     android:headerDividersEnabled="false" 
     android:visibility="visible" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.6" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.0" /> 

</android.support.constraint.ConstraintLayout> 

EditData XML

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    tools:context=".EditData" 
    android:background="@color/BackgroundGrey"> 

    <Button 
     android:id="@+id/saveButton2" 
     android:layout_width="110dp" 
     android:layout_height="66dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@drawable/buttons" 
     android:onClick="toSaveField" 
     android:text="@string/saveButton" 
     android:textSize="16sp" 
     android:textStyle="bold" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.005" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="1.0" /> 

    <Button 
     android:id="@+id/deleteButton1" 
     android:layout_width="110dp" 
     android:layout_height="66dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@drawable/buttons" 
     android:onClick="toDeleteNote" 
     android:text="@string/ButtonDeleteButton" 
     android:textSize="16sp" 
     android:textStyle="bold" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="1.0" /> 

    <Button 
     android:id="@+id/sendButton" 
     android:layout_width="110dp" 
     android:layout_height="66dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@drawable/buttons" 
     android:onClick="toSendNote" 
     android:text="@string/sendButtonText" 
     android:textSize="16sp" 
     android:textStyle="bold" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="1.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="1.0" /> 


    <EditText 
     android:id="@+id/textNotAtHomes2" 
     android:layout_width="0dp" 
     android:layout_height="0dp" 
     android:ems="10" 
     android:background="@color/hintTextColour" 
     android:inputType="textMultiLine" 
     android:hint="@string/hintText2" 
     android:textColorHint="@color/hintTextColour2" 
     android:layout_marginLeft="9dp" 
     android:gravity="fill_horizontal" 
     android:padding="6dp" 
     app:layout_constraintLeft_toLeftOf="parent" 
     android:layout_marginRight="9dp" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintBottom_toBottomOf="parent" 
     android:layout_marginBottom="89dp" 
     app:layout_constraintTop_toTopOf="parent" 
     android:layout_marginTop="89dp" 
     tools:layout_constraintTop_creator="1" 
     tools:layout_constraintRight_creator="1" 
     tools:layout_constraintBottom_creator="1" 
     android:layout_marginStart="9dp" 
     android:layout_marginEnd="9dp" 
     tools:layout_constraintLeft_creator="1" 
     app:layout_constraintHorizontal_bias="0.0" 
     app:layout_constraintVertical_bias="1.0" /> 

    <EditText 
     android:id="@+id/ListName2" 
     android:layout_width="0dp" 
     android:layout_height="37dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@color/BackgroundGrey2" 
     android:inputType="text" 
     android:textColor="@color/blackText" 
     android:textSize="20sp" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.0" 
     tools:layout_constraintLeft_creator="1" 
     tools:layout_constraintRight_creator="1" /> 

    <EditText 
     android:id="@+id/mapNoDisplay2" 
     android:layout_width="172dp" 
     android:layout_height="37dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@color/BackgroundGrey2" 
     android:inputType="number" 
     android:textColor="@color/blackText" 
     android:textSize="20sp" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.065" /> 

    <EditText 
     android:id="@+id/dateDisplay2" 
     android:layout_width="172dp" 
     android:layout_height="37dp" 
     android:layout_marginBottom="8dp" 
     android:layout_marginEnd="8dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginStart="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@color/BackgroundGrey2" 
     android:inputType="date" 
     android:textColor="@color/blackText" 
     android:textSize="20sp" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="1.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.065" /> 

</android.support.constraint.ConstraintLayout> 

Answer 1

Es ist nicht klar, was Sie abfragen. Diese sind alle genau die gleiche Zeichenfolge

String map = adapterView.getItemAtPosition(i).toString(); 
String name = adapterView.getItemAtPosition(i).toString(); 
String date = adapterView.getItemAtPosition(i).toString(); 
String notAtHomes = adapterView.getItemAtPosition(i).toString(); 

So also SQLite nicht finden, was Sie in dbHelper.getItemID übergeben, gibt einen ungültigen ID-Wert.

Ich glaube, Sie suchen nach anderen Daten aus dem Adapter, die nicht wirklich möglich ist, weil Sie nur die dritte Spalte des Cursors zum Adapter hinzugefügt haben.

ArrayList<String> listData = new ArrayList<>(); 
    while (data.moveToNext()) { 
     listData.add(data.getString(2)); 
    } 

Sie sollten wirklich einen Adapter Cursor prüfen, mit richtig ein Listview mit einer Datenbank zu implementieren