Android Datenbank Ausnahme, Datenbank nicht gefunden

Question

Ich habe auf SQLite von Head First Android studiert, ich habe versucht, es zu nutzen, aber ich bekomme eine Ausnahme als meine Antwort. Erstellung der Datenbank `

package com.example.motorhead_luffy.tv; 
import android.content.ContentValues; 
import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 

/** 
* Created by MOTORHEAD_LUFFY on 10-06-2017. 
*/ 
class Anime extends SQLiteOpenHelper { 
Anime(Context context) 
{super(context,"ANIME",null,1); 
} 
@Override 
    public void onCreate(SQLiteDatabase database) 
{ 
    database.execSQL("CREATE TABLE ANIME (_id INTEGER PRIMARY KEY AUTOINCREMENT, " 
         + "NAME TEXT, " 
         + "DESCRIPTION TEXT, " 
         + "IMAGE INTEGER);"); 
    insertmore(database,"Naruto","A anime about ninjas",R.drawable.narut); 
    insertmore(database,"One Piece","A anime about pirates",R.drawable.one); 
    insertmore(database,"Death Note","A anime about shinigamis",R.drawable.deathnote); 

} 
@Override 
    public void onUpgrade(SQLiteDatabase database, int n,int o) 
{ 
if(o<1) 
{ 
    database.execSQL("CREATE TABLE ANIME (_ID INTEGER PRIMARY KEY AUTOINCREMENT, " 
      + "NAME TEXT, " 
      + "DESCRIPTION TEXT, " 
      + "IMAGE INTEGER);"); 
    insertmore(database,"Naruto","A anime about ninjas",R.drawable.narut); 
    insertmore(database,"One Piece","A anime about pirates",R.drawable.one); 
    insertmore(database,"Death Note","A anime about shinigamis",R.drawable.deathnote); 

} 
else if(o<3) 
{ 
    database.execSQL("ALTER TABLE ANIME ADD COLUMN FAVOURITE NUMERIC;"); 
} 
} 
    private static void insertmore(SQLiteDatabase database,String name,String desc,int id) 
    { 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put("NAME",name); 
     contentValues.put("DESCRIPTION",desc); 
     contentValues.put("IMAGE",id); 
     database.insert("ANIME",null,contentValues); 
    } 
} 

wo ich es verwenden

package com.example.motorhead_luffy.tv; 

import android.app.ListActivity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.CursorAdapter; 
import android.widget.ListView; 
import android.widget.SimpleCursorAdapter; 
import android.widget.Toast; 


public class SecondActivity extends ListActivity{ 
private SQLiteDatabase database; 
private Cursor cursor; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     ListView listView = getListView(); 
     try 
     { 
      SQLiteOpenHelper anime = new Anime(this); 
      database = anime.getReadableDatabase(); 
      cursor = database.query("ANIME", 
            new String[]{"_id","NAME"}, 
            null,null,null,null,null); 
      CursorAdapter listAdapter = new SimpleCursorAdapter(this, 
                  android.R.layout.simple_list_item_1, 
                  cursor, 
                  new String[]{"NAME"}, 
                  new int[]{android.R.id.text1}, 
                  0); 
       listView.setAdapter(listAdapter); 
     } 
     catch (Exception e) 
     { 
      Toast toast = Toast.makeText(this,"UNAVAILABLE",Toast.LENGTH_SHORT); 
      toast.show(); 
     } 
    } 
    @Override 
    public void onDestroy() 
    { 
     super.onDestroy(); 
     cursor.close(); 
     database.close(); 
    } 
    @Override 
    public void onListItemClick(ListView listView, View view,int pos, long id) 
    { 
     Intent intent = new Intent(SecondActivity.this, NextActivity.class); 
     intent.putExtra("id",(int)id); 
     startActivity(intent); 
    } 
} 

Der Ausgang I nicht erreichbar bekommen (in Fang geschrieben), es kann jemand korrigieren?

Dies ist die Ausgabe von logcat (print)

06-22 15:45:39.064 576-576/com.example.motorhead_luffy.tv W/System.err: java.lang.IllegalArgumentException: column '_id' does not exist 
06-22 15:45:39.070 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:303) 
06-22 15:45:39.070 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.widget.CursorAdapter.init(CursorAdapter.java:172) 
06-22 15:45:39.070 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.widget.CursorAdapter.<init>(CursorAdapter.java:149) 
06-22 15:45:39.070 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.widget.ResourceCursorAdapter.<init>(ResourceCursorAdapter.java:91) 
06-22 15:45:39.071 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.widget.SimpleCursorAdapter.<init>(SimpleCursorAdapter.java:104) 
06-22 15:45:39.071 576-576/com.example.motorhead_luffy.tv W/System.err:  at com.example.motorhead_luffy.tv.SecondActivity.onCreate(SecondActivity.java:31) 
06-22 15:45:39.071 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.Activity.performCreate(Activity.java:5248) 
06-22 15:45:39.071 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110) 
06-22 15:45:39.072 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162) 
06-22 15:45:39.072 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257) 
06-22 15:45:39.072 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.ActivityThread.access$800(ActivityThread.java:139) 
06-22 15:45:39.072 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210) 
06-22 15:45:39.073 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:102) 
06-22 15:45:39.073 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.os.Looper.loop(Looper.java:136) 
06-22 15:45:39.073 576-576/com.example.motorhead_luffy.tv W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5086) 
06-22 15:45:39.073 576-576/com.example.motorhead_luffy.tv W/System.err:  at java.lang.reflect.Method.invokeNative(Native Method) 
06-22 15:45:39.074 576-576/com.example.motorhead_luffy.tv W/System.err:  at java.lang.reflect.Method.invoke(Method.java:515) 
06-22 15:45:39.074 576-576/com.example.motorhead_luffy.tv W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
06-22 15:45:39.075 576-576/com.example.motorhead_luffy.tv W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
06-22 15:45:39.075 576-576/com.example.motorhead_luffy.tv W/System.err:  at dalvik.system.NativeStart.main(Native Method) 

Auch die Anwendung auf Android 4.4.4 kitkat (API-19) eine Fehlfunktion hat funktioniert, aber korrekt auf 5,1 (API-21). Beide sind unterschiedliche Geräte.

Answer 1

Spalte '_id' existiert nicht Überprüfen Sie, ob die ID-Spalte korrekt angezeigt wird. Versuchen Sie, den Code zu debuggen, indem Sie Debug-Punkte setzen und sehen, wo genau die Ausnahme kommt.