创建多个表时，应用程序崩溃

Question

当仅创建第一个表时，应用程序可以正常工作，但在创建多个表时会崩溃。

以下是我的DatabaseHelper类

public class DatabaseHelper extends SQLiteOpenHelper{ 

public static final String DATABASE_NAME = "TrainingSet.db"; 

//Column Names for selectLocation class table 
public static final String TABLE_NAME = "PrimaryLocation"; 
public static final String ID = "ID"; 
public static final String LOCATION_NAME = "LOCATION_NAME"; 
public static final String MAC_1 = "MAC_ADDRESS_1"; 
public static final String MAC_2 = "MAC_ADDRESS_2"; 
public static final String MAC_3 = "MAC_ADDRESS_3"; 

//Column Names for TrainingSet class table 
public static final String TABLE_NAME_TRAINING = "TrainingSet"; 
public static final String TRAINING_ID = "ID"; 
public static final String X_VALUE = "X"; 
public static final String Y_VALUE = "Y"; 
public static final String RSS_M1 = "M1"; 
public static final String RSS_M2 = "M2"; 
public static final String RSS_M3 = "M3"; 


public DatabaseHelper(Context context) { 
    super(context, DATABASE_NAME, null, 4); 

} 

@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL("CREATE TABLE " + TABLE_NAME + " (" + ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ LOCATION_NAME + " TEXT, " + MAC_1 +" TEXT, "+ MAC_2 +" TEXT, "+ MAC_3 +" TEXT);"); 
    db.execSQL("CREATE TABLE " + TABLE_NAME_TRAINING + " (" + TRAINING_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ X_VALUE + " INTEGER, " + Y_VALUE +" INTEGER, "+ RSS_M1 +" INTEGER, "+ RSS_M2 +" INTEGER, "+ RSS_M3 +" INTEGER, "+ ID +" INTEGER);"); 
    //db.execSQL("create table " + TABLE_NAME_TRAINING + " (" + TRAINING_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ X_VALUE + " INTEGER, " + Y_VALUE +" INTEGER, "+ RSS_M1 +" INTEGER, "+ RSS_M2 +" INTEGER, "+ RSS_M3 +" INTEGER, "+ ID +" INTEGER, " + " FOREIGN KEY ("+ID+") REFERENCES "+TABLE_NAME+"("+ID+"));"); 
} 

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

//METHODS FOR TrainingSet class TABLES 
/*public boolean insertDataTraining(int x, int y, int rss_m1, int rss_m2, int rss_m3, int i){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues contentValues = new ContentValues(); 
    contentValues.put(X_VALUE, x); 
    contentValues.put(Y_VALUE, y); 
    contentValues.put(RSS_M1, rss_m1); 
    contentValues.put(RSS_M2, rss_m2); 
    contentValues.put(RSS_M3, rss_m3); 
    contentValues.put(ID, i); 
    long result = db.insert(TABLE_NAME_TRAINING, null, contentValues); 
    if(result == -1) 
     return false; 
    else 
     return true; 
} 

public Cursor getAllDataTraining(int i){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor res = db.rawQuery("SELECT " + X_VALUE + " , " + Y_VALUE + " FROM " + TABLE_NAME_TRAINING + " WHERE " + ID + " = " + i , null); 
    return res; 
}*/ 

//METHODS FOR selectLocation class TABLES 

public int deleteData(int id){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    //delete returns the number of rows affected 
    int res = db.delete(TABLE_NAME, "ID=?", new String[]{String.valueOf(id)}); 
    return res; 
} 

public boolean insertData(String locationname, String mac1,String mac2, String mac3){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues contentValues = new ContentValues(); 
    contentValues.put(LOCATION_NAME, locationname); 
    contentValues.put(MAC_1, mac1); 
    contentValues.put(MAC_2, mac2); 
    contentValues.put(MAC_3, mac3); 
    long result = db.insert(TABLE_NAME, null, contentValues); 
    if(result == -1) 
     return false; 
    else 
     return true; 
} 

public Cursor getAllData(){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor res = db.rawQuery("select * from " + TABLE_NAME, null); 
    return res; 
} 

} 

我已经增加了数据库的版本号，也卸载并重新安装这给了我同样的错误应用程序的代码。

另外我想创建一个从“PrimaryLocation”表到“TrainingSet”表的一对多关系。为此，我在创建第二个表时添加了外键关系（我已经注释掉了）。语法是否正确？

任何帮助，将不胜感激。提前致谢。

编辑：我得到了

Process: com.example.indoorpositioning.indoorpositioning, PID: 12863 
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.indoorpositioning.indoorpositioning/com.example.indoorpositioning.indoorpositioning.selectLocation}: android.database.sqlite.SQLiteException: duplicate column name: ID (code 1): , while compiling: CREATE TABLE TrainingSet (ID INTEGER PRIMARY KEY AUTOINCREMENT, X INTEGER, Y INTEGER, M1 INTEGER, M2 INTEGER, M3 INTEGER, ID INTEGER); 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
    at android.app.ActivityThread.-wrap11(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:5417) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
    Caused by: android.database.sqlite.SQLiteException: duplicate column name: ID (code 1): , while compiling: CREATE TABLE TrainingSet (ID INTEGER PRIMARY KEY AUTOINCREMENT, X INTEGER, Y INTEGER, M1 INTEGER, M2 INTEGER, M3 INTEGER, ID INTEGER); 
    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887) 
    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:498) 
    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588) 
    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58) 
    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31) 
    at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1674) 
    at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1605) 
    at com.example.indoorpositioning.indoorpositioning.DatabaseHelper.onCreate(DatabaseHelper.java:43) 
    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251) 
    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163) 
    at com.example.indoorpositioning.indoorpositioning.DatabaseHelper.getAllData(DatabaseHelper.java:101) 
    at com.example.indoorpositioning.indoorpositioning.selectLocation.displaydata(selectLocation.java:43) 
    at com.example.indoorpositioning.indoorpositioning.selectLocation.onCreate(selectLocation.java:157) 
    at android.app.Activity.performCreate(Activity.java:6251) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)  
    at android.app.ActivityThread.-wrap11(ActivityThread.java)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)  
    at android.os.Handler.dispatchMessage(Handler.java:102)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:5417)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  

Answer 1

你在TABLE_NAME_TRAINING

TRAINING_ID + " INTEGER PRIMARY KEY AUTOINCREMENT

而且

复制钥匙的模拟器中运行应用程序时在logcat的窗口下面的ID +" INTEGER);"

---

public static final String ID = "ID"; 

//Column Names for TrainingSet class table 
public static final String TABLE_NAME_TRAINING = "TrainingSet"; 
public static final String TRAINING_ID = "ID";