我似乎无法在代码中找到错误。我尝试删除数据库并更改版本号，因为我之后添加了bottom_time，但似乎无法识别它..尝试在getDiveList（） - Method中执行db.query时会显示错误。
public class DatabaseHelper extends SQLiteOpenHelper {
//---DB Details-------------------------------------
public static final String DATABASE_NAME = "SpotTheFish.db";
public static final int DATABASE_VERSION = 3;
//---User Dives------------------------------
public static final String DIVE_TABLE_NAME = "all_dives";
public static final String DIVE_ID = "dive_id";
public static final String KEY_LOCATION_NAME = "dive_location";
public static final String KEY_DATE = "date";
public static final String KEY_TIME_IN = "time_in";
public static final String KEY_TIME_OUT = "time_out";
public static final String KEY_BOTTOM_TIME = "bottom_time";
public static final String KEY_BARS_START = "bars_at_start";
public static final String KEY_BARS_END = "bars_at_end";
public static final String KEY_DEPTH = "depth";
public static final String KEY_TEMPERATURE = "temperature";
public static final String KEY_VISIBILITY = "visibility";
public static final String[] DIVE_TABLE_KEYS = {DIVE_ID, LINK_STATES_REGIONS_ID, KEY_LOCATION_NAME, KEY_DATE, KEY_TIME_IN, KEY_TIME_OUT, KEY_BOTTOM_TIME, KEY_BARS_START, KEY_BARS_END, KEY_DEPTH, KEY_TEMPERATURE, KEY_VISIBILITY};
public static final int COL_DIVE_ID = 0;
public static final int COL_DIVE_LINK_STATES_REGIONS = 1;
public static final int COL_LOCATION_NAME = 2;
public static final int COL_DATE = 3;
public static final int COL_TIME_IN = 4;
public static final int COL_TIME_OUT = 5;
public static final int COL_BOTTOM_TIME = 6;
public static final int COL_BARS_START = 7;
public static final int COL_BARS_END = 8;
public static final int COL_DEPTH = 9;
public static final int COL_TEMPERATURE = 10;
public static final int COL_VISIBILITY = 11;
private static final String CREATE_DIVE_TABLE =
"CREATE TABLE " + DIVE_TABLE_NAME + " (" +
DIVE_ID + " INTEGER PRIMARY KEY, " +
LINK_STATES_REGIONS_ID + " INTEGER, " +
KEY_LOCATION_NAME + " TEXT, " +
KEY_DATE + " TEXT, " +
KEY_TIME_IN + " TEXT, " +
KEY_TIME_OUT + " TEXT" +
KEY_BOTTOM_TIME + " TEXT, " +
KEY_BARS_START + " TEXT, " +
KEY_BARS_END + " TEXT" +
KEY_DEPTH + " TEXT, " +
KEY_TEMPERATURE + " TEXT, " +
KEY_VISIBILITY + " TEXT" +
")";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL(CREATE_DIVE_TABLE);
} catch (SQLException e) {
e.printStackTrace();
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + DIVE_TABLE_NAME);
}
/**
* Creates an ArrayList and adds all rows from
* existing database table
*
* @return: ArrayList of subjects
*/
public ArrayList<Dive> getDiveList() {
ArrayList<Dive> diveList = new ArrayList<>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(DIVE_TABLE_NAME, DIVE_TABLE_KEYS,
null, null, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
Dive dive = new Dive(cursor.getLong(DatabaseHelper.COL_DIVE_ID),
cursor.getLong(COL_DIVE_LINK_STATES_REGIONS),
cursor.getString(COL_LOCATION_NAME),
cursor.getString(COL_DATE),
cursor.getString(COL_TIME_IN),
cursor.getString(COL_TIME_OUT),
cursor.getString(COL_BOTTOM_TIME),
cursor.getString(COL_BARS_START),
cursor.getString(COL_BARS_END),
cursor.getString(COL_DEPTH),
cursor.getString(COL_TEMPERATURE),
cursor.getString(COL_VISIBILITY));
diveList.add(dive);
cursor.moveToNext();
}
}
cursor.close();
db.close();
return diveList;
}
}
以下是错误日志：
--------- beginning of crash
05-18 13:43:19.820 7044-7044/com.id12538676.catchemallfishcollection E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.id12538676.catchemallfishcollection, PID: 7044
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.id12538676.catchemallfishcollection/com.id12538676.catchemallfishcollection.StartActivity}: android.database.sqlite.SQLiteException: no such column: bottom_time (code 1): , while compiling: SELECT dive_id, state_region_link_id, dive_location, date, time_in, time_out, bottom_time, bars_at_start, bars_at_end, depth, temperature, visibility FROM all_dives
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: no such column: bottom_time (code 1): , while compiling: SELECT dive_id, state_region_link_id, dive_location, date, time_in, time_out, bottom_time, bars_at_start, bars_at_end, depth, temperature, visibility FROM all_dives
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.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1163)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1034)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1240)
at com.id12538676.catchemallfishcollection.DatabaseHelper.getDiveList(DatabaseHelper.java:364)
at com.id12538676.catchemallfishcollection.DatabaseManager.<init>(DatabaseManager.java:26)
at com.id12538676.catchemallfishcollection.DatabaseManager.getInstance(DatabaseManager.java:19)
at com.id12538676.catchemallfishcollection.StartActivity.onCreate(StartActivity.java:29)
at android.app.Activity.performCreate(Activity.java:6237)
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)
答案 0 :(得分：2)
KEY_TIME_OUT + " TEXT" + KEY_BOTTOM_TIME + " TEXT, " +
您错过了上一列声明中的,逗号。你在其他一些专栏上也有同样的问题。
在那里添加后，您可以卸载您的应用程序以重新创建数据库。
答案 1 :(得分：0)
你应该在升级中调用create function：
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + DIVE_TABLE_NAME);
onCreate(db);
}
并且您还应该替换您的创建查询，如下所示：
private static final String CREATE_DIVE_TABLE =
"CREATE TABLE " + DIVE_TABLE_NAME + " (" +
DIVE_ID + " INTEGER PRIMARY KEY, " +
LINK_STATES_REGIONS_ID + " INTEGER, " +
KEY_LOCATION_NAME + " TEXT, " +
KEY_DATE + " TEXT, " +
KEY_TIME_IN + " TEXT, " +
KEY_TIME_OUT + " TEXT, " +
KEY_BOTTOM_TIME + " TEXT, " +
KEY_BARS_START + " TEXT, " +
KEY_BARS_END + " TEXT, " +
KEY_DEPTH + " TEXT, " +
KEY_TEMPERATURE + " TEXT, " +
KEY_VISIBILITY + " TEXT" +
")";
答案 2 :(得分：0)
请检查表创建查询..在关键超时文本
之后，您错过了一个逗号KEY_TIME_IN + " TEXT, " + KEY_TIME_OUT + " TEXT" + KEY_BOTTOM_TIME + " TEXT, "