android.database.sqlite.SQLiteException：沒有這樣的柱：ID（碼1）在編譯：■

以下錯誤發現當我點擊「插入」按鈕android.database.sqlite.SQLiteException：沒有這樣的柱：ID（碼1）在編譯：■

Error Found :android.database.sqlite.SQLiteException: no such column : id (code 1) while compiling : select id,student_name, student_rollno FROM studentTable WHERE idrh

錯誤實測值：android.database.sqlite .SQLiteException：沒有這樣的柱：ID（碼1）在編譯：選擇ID，student_name，student_rollno FROM studentTable WHERE idrh

注：其中R h是我進入

的ID編碼

Dbhelper.java

package com.example.a; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteException; 
import android.database.sqlite.SQLiteOpenHelper; 


public class DbActivity { 
public static final String KEY_ID = "id"; 
public static final String KEY_NAME = "student_name"; 
public static final String KEY_ROLLNO = "student_rollno"; 


private static final String DATABASE_NAME= "Studentdb"; 
private static final int DATABASE_VERSION = 1; 
private static final String DATABASE_TABLE = "studentTable"; 

private DbHelper ourHelper; 
private final Context ourContext; 
private SQLiteDatabase ourDatabase; 

class DbHelper extends SQLiteOpenHelper { 

    public DbHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 

     // TODO Auto-generated method stub 
    /* db.execSQL("CREATE TABLE IF NOT EXISTS " + DATABASE_TABLE + " (" + 
     KEY_ID + " TEXT PRIMARY KEY , " + 
     KEY_NAME + " TEXT NOT NULL , " + 
     KEY_ROLLNO + " TEXT NOT NULL);" 
    */ 
     db.execSQL("CREATE TABLE if not exists database_table (id TEXT PRIMARY KEY ," 
       + "student_name" 
       + " TEXT ," 
       + "student_rollno" 
       + " TEXT);"); 

      } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
     onCreate(db); 
    } 

} 


public DbActivity(Context c) { 
ourContext = c; 
} 

public DbActivity open() throws SQLException{ 
    ourHelper = new DbHelper(ourContext); 
    ourDatabase = ourHelper.getWritableDatabase(); 
    return this; 
} 

public void close() { 
    ourHelper.close(); 
} 

public void createEntry(String id, String name, String rollno) { 
    // TODO Auto-generated method stub 
    ContentValues cv = new ContentValues(); 
    cv.put(KEY_ID, id); 
    cv.put(KEY_NAME, name); 
    cv.put(KEY_ROLLNO, rollno); 
    ourDatabase.insert(DATABASE_TABLE, null, cv); 
} 


public String getData() throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    String result = ""; 

    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null,null); 
    int id = c.getColumnIndex(KEY_ID); 
    int name = c.getColumnIndex(KEY_NAME); 
    int rollno = c.getColumnIndex(KEY_ROLLNO); 

    for(c.moveToFirst();!c.isAfterLast();c.moveToNext()); 
    { 
     result = result + c.getColumnName(id) + "" + c.getColumnName(name) + "" + c.getColumnName(rollno) + "/n"; 

    } 
    return result; 
} 



public String getName(String s) throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_ID + "" + s, null, null, null, null); 
    if(c!=null) 
    { 
     c.moveToFirst(); 
     String name = c.getString(1); 
     return name; 
    } 
    return null; 

} 

public String getRollno(String s) throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_ID + "" + s, null, null, null, null); 
    if(c!=null) 
    { 
     c.moveToFirst(); 
     String rollno = c.getString(2); 
     return rollno; 
    } 
    return null; 

} 

public void updateEntry (String id1, String name, String rollno) throws SQLException { 
ContentValues cvUpdate = new ContentValues(); 
cvUpdate.put(KEY_ID, id1); 
cvUpdate.put(KEY_NAME, name); 
cvUpdate.put(KEY_ROLLNO, rollno); 
ourDatabase.update(DATABASE_TABLE, cvUpdate, KEY_ID + "=" + id1 , null); 
} 

public void deleteEntry(String id) throws SQLException { 

    ourDatabase.delete(DATABASE_TABLE, KEY_ID + "=" + id , null); 
}

}

MainActivity.java

package com.example.a; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteException; 
import android.database.sqlite.SQLiteOpenHelper; 


public class DbActivity { 
public static final String KEY_ID = "id"; 
public static final String KEY_NAME = "student_name"; 
public static final String KEY_ROLLNO = "student_rollno"; 


private static final String DATABASE_NAME= "Studentdb"; 
private static final int DATABASE_VERSION = 1; 
private static final String DATABASE_TABLE = "studentTable"; 

private DbHelper ourHelper; 
private final Context ourContext; 
private SQLiteDatabase ourDatabase; 

class DbHelper extends SQLiteOpenHelper { 

    public DbHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 

     // TODO Auto-generated method stub 
    /* db.execSQL("CREATE TABLE IF NOT EXISTS " + DATABASE_TABLE + " (" + 
     KEY_ID + " TEXT PRIMARY KEY , " + 
     KEY_NAME + " TEXT NOT NULL , " + 
     KEY_ROLLNO + " TEXT NOT NULL);" 
    */ 
     db.execSQL("CREATE TABLE if not exists database_table (id TEXT PRIMARY KEY ," 
       + "student_name" 
       + " TEXT ," 
       + "student_rollno" 
       + " TEXT);"); 

      } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
     onCreate(db); 
    } 

} 


public DbActivity(Context c) { 
ourContext = c; 
} 

public DbActivity open() throws SQLException{ 
    ourHelper = new DbHelper(ourContext); 
    ourDatabase = ourHelper.getWritableDatabase(); 
    return this; 
} 

public void close() { 
    ourHelper.close(); 
} 

public void createEntry(String id, String name, String rollno) { 
    // TODO Auto-generated method stub 
    ContentValues cv = new ContentValues(); 
    cv.put(KEY_ID, id); 
    cv.put(KEY_NAME, name); 
    cv.put(KEY_ROLLNO, rollno); 
    ourDatabase.insert(DATABASE_TABLE, null, cv); 
} 


public String getData() throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    String result = ""; 

    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null,null); 
    int id = c.getColumnIndex(KEY_ID); 
    int name = c.getColumnIndex(KEY_NAME); 
    int rollno = c.getColumnIndex(KEY_ROLLNO); 

    for(c.moveToFirst();!c.isAfterLast();c.moveToNext()); 
    { 
     result = result + c.getColumnName(id) + "" + c.getColumnName(name) + "" + c.getColumnName(rollno) + "/n"; 

    } 
    return result; 
} 



public String getName(String s) throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_ID + "" + s, null, null, null, null); 
    if(c!=null) 
    { 
     c.moveToFirst(); 
     String name = c.getString(1); 
     return name; 
    } 
    return null; 

} 

public String getRollno(String s) throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_ID + "" + s, null, null, null, null); 
    if(c!=null) 
    { 
     c.moveToFirst(); 
     String rollno = c.getString(2); 
     return rollno; 
    } 
    return null; 

} 

public void updateEntry (String id1, String name, String rollno) throws SQLException { 
ContentValues cvUpdate = new ContentValues(); 
cvUpdate.put(KEY_ID, id1); 
cvUpdate.put(KEY_NAME, name); 
cvUpdate.put(KEY_ROLLNO, rollno); 
ourDatabase.update(DATABASE_TABLE, cvUpdate, KEY_ID + "=" + id1 , null); 
} 

public void deleteEntry(String id) throws SQLException { 

    ourDatabase.delete(DATABASE_TABLE, KEY_ID + "=" + id , null); 
} 
} 

}

activity_main.xml中文件

<RelativeLayout 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" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context=".MainActivity" > 

<EditText 
    android:id="@+id/etSQLName" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentTop="true" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="50dp" 
    android:ems="10" 
    android:hint="Enter Name" > 

    <requestFocus /> 
</EditText> 

<Button 
    android:id="@+id/bSQLInsert" 
    style="?android:attr/buttonStyleSmall" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentLeft="true" 
    android:layout_below="@+id/bSQLMain" 
    android:layout_marginLeft="17dp" 
    android:layout_marginTop="38dp" 
    android:text="Insert" /> 

<Button 
    android:id="@+id/bSQLUpdate" 
    style="?android:attr/buttonStyleSmall" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBaseline="@+id/bSQLInsert" 
    android:layout_alignBottom="@+id/bSQLInsert" 
    android:layout_toRightOf="@+id/bSQLInsert" 
    android:text="update" /> 

<Button 
    android:id="@+id/bSQLView" 
    style="?android:attr/buttonStyleSmall" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBaseline="@+id/bSQLUpdate" 
    android:layout_alignBottom="@+id/bSQLUpdate" 
    android:layout_toRightOf="@+id/bSQLUpdate" 
    android:text="view" /> 

<Button 
    android:id="@+id/bSQLDelete" 
    style="?android:attr/buttonStyleSmall" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignTop="@+id/bSQLView" 
    android:layout_toRightOf="@+id/bSQLView" 
    android:text="delete" /> 

<Button 
    android:id="@+id/bSQLBack" 
    style="?android:attr/buttonStyleSmall" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/bSQLUpdate" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="18dp" 
    android:text="back" /> 

<Button 
    android:id="@+id/bSQLMain" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/etSQLRollno" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="83dp" 
    android:text="Next" /> 

<EditText 
    android:id="@+id/etSQLRollno" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/etSQLName" 
    android:layout_below="@+id/etSQLName" 
    android:ems="10" 
    android:hint="Enter Rollno" 
    /> 

<EditText 
    android:id="@+id/etSQLId" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/etSQLRollno" 
    android:layout_below="@+id/etSQLRollno" 
    android:layout_marginTop="20dp" 
    android:ems="10" 
    android:hint="enter ID" 
    />

2>問題 - 如何刪除次E中的表已經由AVD或虛擬設備創建

來源

2013-07-16 Jyotika Pandey

願這幫助你：

替換此行：

public static final String KEY_ID = "id";

通過

public static final String KEY_ID = "_id";

編輯： //改變這個方法

public String getName(String s) throws SQLException { 
    // TODO Auto-generated method stub 
    String[] columns = new String[]{KEY_ID,KEY_NAME,KEY_ROLLNO}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_ID + "=" + s, null, null, null, null);// change this line in this method 
    if(c!=null) 
    { 
     c.moveToFirst(); 
     String name = c.getString(1); 
     return name; 
    } 
    return null; 

}

來源

2013-07-16 10:36:09

我已經這樣做了前面，但隨後還有，我也得到同樣的錯誤 –

看到編輯答案 –

db.execSQL（「CREATE TABLE如果不存在database_table（_id TEXT PRIMARY KEY，」 –

android.database.sqlite.SQLiteException：沒有這樣的柱：ID（碼1）在編譯：■

回答

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