Question

我试图更新我的数据库，但每次我收到错误说没有这样的列。我还是Android的初学者，所以任何帮助都会受到赞赏。

提前感谢你。

这是我的2个数据库类：

AreaMonitoringDB：

public class AreaMonitoringDB extends SQLiteOpenHelper {

private static final String DEBUG_TAG = "AreaMonitoringDB";

private static final String DATABASE_NAME = "AreaMonitoring.db";
private static final int DATABASE_VERSION = 10;
public static final String TABLE_NAME = "AreaMonitor";
public static final String ID = "_id";
public static final String COL_FLAG= "enable1";
public static final String COL_FLAG2 = "enable2";
public static final String COL_FLAG3 = "enable3";
public static final String COL_NUMBER = "tel_number";

private static final String CREATE_TABLE_AREAMONITOR = "create table "
        + TABLE_NAME + " (" 
        + ID + " integer primary key, " 
        + COL_FLAG + " integer not null, " 
        + COL_FLAG2 + " integer not null, " 
        + COL_FLAG3 + " integer not null, " 
        + COL_NUMBER + " text );";

private static final String DB_SCHEMA = CREATE_TABLE_AREAMONITOR;

public AreaMonitoringDB(Context cx){
    super(cx, DATABASE_NAME, null, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(DB_SCHEMA);
    //init(db);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    Log.w(DEBUG_TAG, "Upgrading database. Existing contents will be lost. ["
            + oldVersion + "]->[" + newVersion + "]");
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
    onCreate(db);       
}

}

AreaMonitoringProvider：

public class AreaMonitoringProvider extends ContentProvider {

private static final String TAG = "AreaMonitoringProvider";

private AreaMonitoringDB mDB;

private static final String AUTHORITY = "com.data.AreaMonitoringProvider";

private static final String BASE_PATH = "AreaMonitor";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
        + "/" + BASE_PATH);



private static final UriMatcher sURIMatcher = new UriMatcher(
        UriMatcher.NO_MATCH);
static {
    sURIMatcher.addURI(AUTHORITY, BASE_PATH, 0);
}



@Override
public boolean onCreate() {
    mDB = new AreaMonitoringDB(getContext());
    return true;
}

@Override
public Cursor query(Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {
    SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
    queryBuilder.setTables(AreaMonitoringDB.TABLE_NAME);


    Cursor cursor = queryBuilder.query(mDB.getReadableDatabase(),
            projection, selection, selectionArgs, null, null, sortOrder);
    cursor.setNotificationUri(getContext().getContentResolver(), uri);
    return cursor;
}


@Override
public int update(Uri uri, ContentValues values, String selection,
        String[] selectionArgs) {

   SQLiteDatabase sqlDB = mDB.getWritableDatabase();

    int rowsAffected;

     String id = uri.getLastPathSegment();
     StringBuilder modSelection = new StringBuilder(AreaMonitoringDB.ID
             + "=" + id);

     if (!TextUtils.isEmpty(selection)) {
         modSelection.append(" AND " + selection);
     }

     return rowsAffected = sqlDB.update(AreaMonitoringDB.TABLE_NAME,
             values, modSelection.toString(), null);
}

@Override
public int delete(Uri arg0, String arg1, String[] arg2) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public String getType(Uri arg0) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public Uri insert(Uri arg0, ContentValues arg1) {
    // TODO Auto-generated method stub
    return null;
}


 }

在我的主要活动中，我使用以下方式更新它：

                            ContentResolver cr1 = getContentResolver();
                            ContentValues values = new ContentValues();
                            values.put(AreaMonitoringDB.COL_FLAG, flag);
                            values.put(AreaMonitoringDB.COL_NUMBER, stringArea);
                            Toast.makeText(getApplicationContext(), " "+flag+" "+stringArea, Toast.LENGTH_SHORT).show();
                            cr1.update(AreaMonitoringProvider.CONTENT_URI, 
                            values, 
                            AreaMonitoringDB.ID + "="+ 0, 
                            null);
                            Log.e("TEST PROVIDER"," NUMBER "+ AreaMonitoringDB.COL_NUMBER);
                            Log.e("TEST PROVIDER"," ID "+ AreaMonitoringDB.ID );

logcat的：

   E/AndroidRuntime( 3831): FATAL EXCEPTION: main
   E/AndroidRuntime( 3831): android.database.sqlite.SQLiteException: no such column
   : AreaMonitor: , while compiling: UPDATE AreaMonitor SET enable1=?,tel_number=?
   WHERE _id=AreaMonitor AND _id=0
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteCompiledSql.nat
   ive_compile(Native Method)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteCompiledSql.<in
   it>(SQLiteCompiledSql.java:64)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteProgram.compile
   Sql(SQLiteProgram.java:146)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteProgram.compile
   AndbindAllArgs(SQLiteProgram.java:367)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteStatement.acqui
   reAndLock(SQLiteStatement.java:253)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteStatement.execu
   teUpdateDelete(SQLiteStatement.java:83)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteDatabase.update
   WithOnConflict(SQLiteDatabase.java:1829)
   E/AndroidRuntime( 3831):        at android.database.sqlite.SQLiteDatabase.update
   (SQLiteDatabase.java:1780)
   E/AndroidRuntime( 3831):        at com.notfall.AreaMonitoringProvider.update(Are
   aMonitoringProvider.java:73)
   E/AndroidRuntime( 3831):        at android.content.ContentProvider$Transport.upd
   ate(ContentProvider.java:233)
   E/AndroidRuntime( 3831):        at android.content.ContentResolver.update(Conten
   tResolver.java:847)
   E/AndroidRuntime( 3831):        at com.notfall.MainActivity$1$1.onClick(MainActi
   vity.java:221)
   E/AndroidRuntime( 3831):        at com.android.internal.app.AlertController$Butt
    onHandler.handleMessage(AlertController.java:166)
   E/AndroidRuntime( 3831):        at android.os.Handler.dispatchMessage(Handler.ja
   va:99)
   E/AndroidRuntime( 3831):        at android.os.Looper.loop(Looper.java:132)
   E/AndroidRuntime( 3831):        at android.app.ActivityThread.main(ActivityThrea
   d.java:4025)
   E/AndroidRuntime( 3831):        at java.lang.reflect.Method.invokeNative(Native
   Method)
   E/AndroidRuntime( 3831):        at java.lang.reflect.Method.invoke(Method.java:4
   91)
   E/AndroidRuntime( 3831):        at com.android.internal.os.ZygoteInit$MethodAndA
   rgsCaller.run(ZygoteInit.java:841)
   E/AndroidRuntime( 3831):        at com.android.internal.os.ZygoteInit.main(Zygot
   eInit.java:599)
   E/AndroidRuntime( 3831):        at dalvik.system.NativeStart.main(Native Method)

@SLUKIAN 您可以查看此代码中的CursorIndexOutOdBounds Exception

        ContentResolver cr = getContentResolver();
        final String[] projection = { AreaMonitoringDB.ID, AreaMonitoringDB.COL_FLAG,AreaMonitoringDB.COL_FLAG2,AreaMonitoringDB.COL_FLAG3,AreaMonitoringDB.COL_NUMBER };
        final String id = "%1%";
         cur = cr.query(AreaMonitoringProvider.CONTENT_URI, 
                projection, 
                AreaMonitoringDB.ID + " LIKE ?", 
                new String[] {id}, 
                null);

        cur.moveToFirst();

LOGCAT：

  03-21 02:11:42.590: E/AndroidRuntime(7665): FATAL EXCEPTION: main
   03-21 02:11:42.590: E/AndroidRuntime(7665): android.database.CursorIndexOutOfBoundsException: Index 0          requested, with a size of 0
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at   android.database.AbstractCursor.checkPosition(AbstractCursor.java:421)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:117)
 03-21 02:11:42.590: E/AndroidRuntime(7665):    at android.database.AbstractWindowedCursor.getInt(AbstractWindowedCursor.java:49)
 03-21 02:11:42.590: E/AndroidRuntime(7665):    at android.database.CursorWrapper.getInt(CursorWrapper.java:96)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at com.notfall.MainActivity$3.onClick(MainActivity.java:324)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.view.View.performClick(View.java:3112)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.view.View$PerformClick.run(View.java:11956)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.os.Handler.handleCallback(Handler.java:587)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.os.Handler.dispatchMessage(Handler.java:92)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.os.Looper.loop(Looper.java:132)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at android.app.ActivityThread.main(ActivityThread.java:4025)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at java.lang.reflect.Method.invokeNative(Native Method)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at java.lang.reflect.Method.invoke(Method.java:491)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at     com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
  03-21 02:11:42.590: E/AndroidRuntime(7665):   at dalvik.system.NativeStart.main(Native Method)

Answer 1

您应该使用ContentProvider update()方法：

SQLiteDatabase sqlDB = mDB.getWritableDatabase();
int rowsAffected;

return rowsAffected = sqlDB.update(AreaMonitoringDB.TABLE_NAME, values, selection, selectionArgs);
}

如果您要查询特定的Uri联系人，请使用UriMatcher（添加要匹配的特定Uris）并在update()方法中切换其值。

Answer 2

增加数据库版本。它应该删除当前表并重新创建它以解决任何缺失的列：

private static final int DATABASE_VERSION = 11;  //previously 10

Answer 3

如果您为现有表引入了新列。首先从模拟器中卸载旧应用程序，然后重新安装应用程序。我认为这会奏效。

Answer 4

我认为该错误是由于COL_FLAG2和COL_FLAG3字段设置为NOT NULL而更新表时未指定这些列的值。

尝试从表定义中删除NOT NULL约束，或在更新表时提供值。

Android SQLiteException：没有这样的列

4 个答案: