我遇到了这个问题，虽然效果很好，但是当我打电话给GameStore.commitGame（...）时会出现问题
02-20 14:53:50.457: I/SqliteDatabaseCpp(6438): sqlite returned: error code = 1, msg = near ")": syntax error, db=/data/data/com.dwaik.minesweeper/databases/minesweeper_db
02-20 14:53:50.457: D/AndroidRuntime(6438): Shutting down VM
02-20 14:53:50.467: W/dalvikvm(6438): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
02-20 14:53:50.487: E/AndroidRuntime(6438): FATAL EXCEPTION: main
02-20 14:53:50.487: E/AndroidRuntime(6438): java.lang.RuntimeException: Unable to pause activity {com.dwaik.minesweeper/com.dwaik.minesweeper.view.MainActivity}: android.database.sqlite.SQLiteException: near ")": syntax error: , while compiling: CREATE TABLE grid(id INTEGER PRIMARY KEY,x INTEGER,y INTEGER,num_bombs INTEGER,num_flags INTEGER,num_true_flags INTEGER,num_hidden_nodes INTEGER,)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2726)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2682)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2660)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.access$800(ActivityThread.java:127)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1169)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.os.Handler.dispatchMessage(Handler.java:99)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.os.Looper.loop(Looper.java:137)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.main(ActivityThread.java:4441)
02-20 14:53:50.487: E/AndroidRuntime(6438): at java.lang.reflect.Method.invokeNative(Native Method)
02-20 14:53:50.487: E/AndroidRuntime(6438): at java.lang.reflect.Method.invoke(Method.java:511)
02-20 14:53:50.487: E/AndroidRuntime(6438): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-20 14:53:50.487: E/AndroidRuntime(6438): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-20 14:53:50.487: E/AndroidRuntime(6438): at dalvik.system.NativeStart.main(Native Method)
02-20 14:53:50.487: E/AndroidRuntime(6438): Caused by: android.database.sqlite.SQLiteException: near ")": syntax error: , while compiling: CREATE TABLE grid(id INTEGER PRIMARY KEY,x INTEGER,y INTEGER,num_bombs INTEGER,num_flags INTEGER,num_true_flags INTEGER,num_hidden_nodes INTEGER,)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:134)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:260)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1899)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1839)
02-20 14:53:50.487: E/AndroidRuntime(6438): at com.dwaik.minesweeper.db.DatabaseHelper.createTables(DatabaseHelper.java:78)
02-20 14:53:50.487: E/AndroidRuntime(6438): at com.dwaik.minesweeper.model.GameStore.commitGame(GameStore.java:17)
02-20 14:53:50.487: E/AndroidRuntime(6438): at com.dwaik.minesweeper.view.MainActivity.onPause(MainActivity.java:98)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.Activity.performPause(Activity.java:4563)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1195)
02-20 14:53:50.487: E/AndroidRuntime(6438): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2713)
02-20 14:53:50.487: E/AndroidRuntime(6438): ... 12 more
这是我的DBHelper类
public class DatabaseHelper extends SQLiteOpenHelper
{
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "minesweeper_db";
private static final String TABLE_GRID = "grid";
private static final String TABLE_NODE = "node";
private static final String KEY_X="x";
private static final String KEY_Y="y";
private static final String KEY_ID="id";
private static final String KEY_GRID_NUM_BOMBS="num_bombs";
private static final String KEY_GRID_NUM_FLAGS="num_flags";
private static final String KEY_GRID_NUM_TRUE_FLAGS="num_true_flags";
private static final String KEY_GRID_NUM_HIDDEN_NODES="num_hidden_nodes";
private static final String KEY_NODE_ADJECANT="adjecant";
private static final String KEY_NODE_RENDER_FLAG="render_flag";
private static final String KEY_NODE_BOMB="is_bomb";
private static final String KEY_NODE_REVEALED="is_revealed";
// Table Create Statements
private static final String CREATE_TABLE_GRID = "CREATE TABLE "+ TABLE_GRID +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_GRID_NUM_BOMBS + " INTEGER," +
KEY_GRID_NUM_FLAGS + " INTEGER," +
KEY_GRID_NUM_TRUE_FLAGS + " INTEGER," +
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER," + ")";
private static final String CREATE_TABLE_NODE = "CREATE TABLE "+ TABLE_NODE +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_NODE_ADJECANT + " INTEGER," +
KEY_NODE_RENDER_FLAG + " INTEGER," +
KEY_NODE_BOMB + " INTEGER," +
KEY_NODE_REVEALED + " INTEGER," + ")";
private static final String DELETE_TABLE_GRID = "delete * from "+ TABLE_GRID;
private static final String DELETE_TABLE_NODE = "delete * from "+ TABLE_NODE;
public DatabaseHelper(Context context)
{ super(context, DATABASE_NAME, null , DATABASE_VERSION); }
@Override
public void onCreate(SQLiteDatabase db)
{ createTables(); }
public void createTables()
{
SQLiteDatabase db = getWritableDatabase();
Log.v("creating tables", "....");
db.execSQL(CREATE_TABLE_GRID);
db.execSQL(CREATE_TABLE_NODE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
db.execSQL("DROP TABLE IF EXISTS " + TABLE_GRID);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NODE);
onCreate(db);
}
//---------delete data------------
public void deleteAllData()
{
SQLiteDatabase db = this.getWritableDatabase();
db.execSQL(DELETE_TABLE_GRID);
db.execSQL(DELETE_TABLE_NODE);
}
public void closeDB()
{
SQLiteDatabase db = this.getReadableDatabase();
if (db != null && db.isOpen())
db.close();
}
}
和我保存/恢复数据的GameStore
public class GameStore
{
public static void commitGame( Context context , Game game )
{
DatabaseHelper db = new DatabaseHelper(context.getApplicationContext());
//db.deleteAllData();
db.createTables();
//db.closeDB();
....
}
}
我在那里错过了什么？
答案 0 :(得分：2)
只需从以下查询的最后一行删除","：
private static final String CREATE_TABLE_GRID = "CREATE TABLE "+ TABLE_GRID +
............................
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER," + ")"; <------ Remove "," from last
将其更改如下：
private static final String CREATE_TABLE_GRID = "CREATE TABLE "+ TABLE_GRID +
............................
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER " + ")"; <----- Check here
您对另一个查询也犯了同样的错误：
private static final String CREATE_TABLE_NODE = "CREATE TABLE "+ TABLE_NODE +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
.........................................
KEY_NODE_REVEALED + " INTEGER," + ")"; <------ Remove "," from last
将其更改如下：
private static final String CREATE_TABLE_NODE = "CREATE TABLE "+ TABLE_NODE +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
.........................................
KEY_NODE_REVEALED + " INTEGER" + ")"; <----- Check here
答案 1 :(得分：2)
您在CREATE_TABLE个查询中的结束括号之前添加了一个额外的（，） ...将其删除...或者使用您的“<\ n”重新获得以下查询。< / p>
private static final String CREATE_TABLE_GRID = "CREATE TABLE "+ TABLE_GRID +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_GRID_NUM_BOMBS + " INTEGER," +
KEY_GRID_NUM_FLAGS + " INTEGER," +
KEY_GRID_NUM_TRUE_FLAGS + " INTEGER," +
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER" + ")";
private static final String CREATE_TABLE_NODE = "CREATE TABLE "+ TABLE_NODE +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_NODE_ADJECANT + " INTEGER," +
KEY_NODE_RENDER_FLAG + " INTEGER," +
KEY_NODE_BOMB + " INTEGER," +
KEY_NODE_REVEALED + " INTEGER" + ")";
答案 2 :(得分：2)
错误发生在
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER," + ")";
最后一列不得以逗号结尾。但在你的情况下，" INTEGER,"以逗号结尾。
应该是
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER" + ")";
或
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER )";
所以你需要将两个常量修改为
private static final String CREATE_TABLE_GRID = "CREATE TABLE "+ TABLE_GRID +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_GRID_NUM_BOMBS + " INTEGER," +
KEY_GRID_NUM_FLAGS + " INTEGER," +
KEY_GRID_NUM_TRUE_FLAGS + " INTEGER," +
KEY_GRID_NUM_HIDDEN_NODES + " INTEGER" + ")"; // OR can write + " INTEGER )";
private static final String CREATE_TABLE_NODE = "CREATE TABLE "+ TABLE_NODE +
"(" + KEY_ID + " INTEGER PRIMARY KEY," +
KEY_X + " INTEGER," +
KEY_Y + " INTEGER," +
KEY_NODE_ADJECANT + " INTEGER," +
KEY_NODE_RENDER_FLAG + " INTEGER," +
KEY_NODE_BOMB + " INTEGER," +
KEY_NODE_REVEALED + " INTEGER" + ")"; // OR can write + " INTEGER )";