android - 在android上的sqlite数据库中创建表

标签 android sqlite android-logcat 

@Override
        public void onCreate(SQLiteDatabase db)
        {
            try{
                db.execSQL("create table " +          NotificationManager.getUserStatic(context) + "log ("+
                KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);");

            }
            catch (SQLException e) {
                e.printStackTrace();
            }
        }

        /**
         * onOpen method called when app is opening.
         */

        @Override
        public void onOpen(SQLiteDatabase db)
        {
            try{
                System.out.println("tophere");
                db.execSQL("create table if not exists "+DATABASE_NAME+"." + NotificationManager.getUserStatic(context) + "log ("+
                KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);");
                System.out.println("downhere");
            }
            catch (SQLException e){
                e.printStackTrace();
            }
        }

我们有这段代码用于为应用程序创建数据库。问题是，据我们所知，它不会创建表，因此当我们尝试插入表并从中读取时，它会崩溃。我们已经尝试了所有方法，System.out.println 可以查看哪里失败。我们把 tophere 拿出来，但它永远不会到达日志中的 downhere 部分，所以我们猜测有什么原因导致它在那里失败。我们已使用 DDMS 检查数据库是否位于正确的文件夹中，因此数据库应该在那里，但由于某种原因找不到它(日志中的第 2 行和第 3 行)。

有什么想法吗？

这是错误日志:

04-27 10:45:46.768: I/System.out(6441): tophere
04-27 10:45:46.772: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = unknown database NOPO, db=/data/data/dmri.nopo/databases/NOPO
04-27 10:45:46.772: W/System.err(6441): android.database.sqlite.SQLiteException: unknown database NOPO: , while compiling: create table if not exists NOPO.log (time INTEGER primary key, text TEXT not null);
04-27 10:45:46.792: W/System.err(6441):     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
04-27 10:45:46.792: W/System.err(6441):     at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:134)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:260)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1899)
04-27 10:45:46.823: W/System.err(6441):     at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1839)
04-27 10:45:46.823: W/System.err(6441):     at dmri.nopo.DBAdapter$DatabaseHelper.onOpen(DBAdapter.java:67)
04-27 10:45:46.823: W/System.err(6441):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:180)
04-27 10:45:46.902: W/System.err(6441):     at dmri.nopo.DBAdapter.open(DBAdapter.java:86)
04-27 10:45:46.912: W/System.err(6441):     at dmri.nopo.LogManager.readLogFile(LogManager.java:32)
04-27 10:45:46.912: W/System.err(6441):     at dmri.nopo.LogActivity.onCreate(LogActivity.java:25)
04-27 10:45:46.921: W/System.err(6441):     at android.app.Activity.performCreate(Activity.java:4465)
04-27 10:45:46.921: W/System.err(6441):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-27 10:45:46.931: W/System.err(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-27 10:45:46.931: W/System.err(6441):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-27 10:45:46.941: W/System.err(6441):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-27 10:45:46.941: W/System.err(6441):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-27 10:45:46.953: W/System.err(6441):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-27 10:45:46.953: W/System.err(6441):     at android.os.Looper.loop(Looper.java:137)
04-27 10:45:46.972: W/System.err(6441):     at android.app.ActivityThread.main(ActivityThread.java:4424)
04-27 10:45:46.972: W/System.err(6441):     at java.lang.reflect.Method.invokeNative(Native Method)
04-27 10:45:46.972: W/System.err(6441):     at java.lang.reflect.Method.invoke(Method.java:511)
04-27 10:45:46.982: W/System.err(6441):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-27 10:45:46.982: W/System.err(6441):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-27 10:45:46.992: W/System.err(6441):     at dalvik.system.NativeStart.main(Native Method)
04-27 10:45:47.002: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = no such table: log, db=/data/data/dmri.nopo/databases/NOPO
04-27 10:45:47.012: D/AndroidRuntime(6441): Shutting down VM
04-27 10:45:47.012: W/dalvikvm(6441): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
04-27 10:45:47.181: E/AndroidRuntime(6441): FATAL EXCEPTION: main
04-27 10:45:47.181: E/AndroidRuntime(6441): java.lang.RuntimeException: Unable to start activity ComponentInfo{dmri.nopo/dmri.nopo.LogActivity}: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.os.Looper.loop(Looper.java:137)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.main(ActivityThread.java:4424)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at java.lang.reflect.Method.invokeNative(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at java.lang.reflect.Method.invoke(Method.java:511)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dalvik.system.NativeStart.main(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441): Caused by: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:127)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:94)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteQuery.(SQLiteQuery.java:53)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1449)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1405)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1485)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.DBAdapter.getAllSMS(DBAdapter.java:116)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.LogManager.readLogFile(LogManager.java:34)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.LogActivity.onCreate(LogActivity.java:25)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.Activity.performCreate(Activity.java:4465)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-27 10:45:47.181: E/AndroidRuntime(6441):     ... 11 more

最佳答案

这会对你有所帮助，我已经尝试过并且它也有效

这只是一个例子

public class DatabaseMarks {

    public static final String KEY_STUID = "stuid";
    public static final String KEY_SUB1 = "subject_one";
    public static final String KEY_SUB2 = "subject_two";
    public static final String KEY_SUB3= "subject_three";
    public static final String KEY_MARKS1= "marks_one";
    public static final String KEY_MARKS2 = "marks_two";
    public static final String KEY_MARKS3 = "marks_three";

    private static final String DATABASE_NAME = "Student";
    private static final String DATABASE_MARKSTABLE = "StudentMarks";
    private static final int DATABASE_VERSION = 1;

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

    private static 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 " + DATABASE_MARKSTABLE + " (" +
                    KEY_STUID + " TEXT PRIMARY KEY, " +
                    KEY_SUB1 + " TEXT NOT NULL, " +
                    KEY_SUB2 + " TEXT NOT NULL, " +
                    KEY_SUB3 + " TEXT NOT NULL, " +
                    KEY_MARKS1 + " INTEGER NOT NULL, " +
                    KEY_MARKS2 + " INTEGER NOT NULL, " +
                    KEY_MARKS3 + " INTEGER NOT NULL);"
            );
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub

            db.execSQL("DROP TABLE IF EXISTS " + DATABASE_MARKSTABLE);
            onCreate(db);
        }

    }
    public DatabaseMarks(Context c){
        ourContext = c;
    }
    public DatabaseMarks open()throws SQLException{
        ourHelper = new DbHelper(ourContext);
        ourDatabase = ourHelper.getWritableDatabase();
        return this;
    }
    public void close(){
        ourHelper.close();
    }
    public long createInsert(String stuid, String subject1, String subject2,
            String subject3, String marks1, String marks2, String marks3) {
        // TODO Auto-generated method stub
        ContentValues cv = new ContentValues();
        cv.put(KEY_STUID, stuid);
        cv.put(KEY_SUB1, subject1);
        cv.put(KEY_SUB2, subject2);
        cv.put(KEY_SUB3, subject3);
        cv.put(KEY_MARKS1, marks1);
        cv.put(KEY_MARKS2, marks2);
        cv.put(KEY_MARKS3, marks3);
        return ourDatabase.insert(DATABASE_MARKSTABLE, null, cv);

    }

关于android - 在android上的sqlite数据库中创建表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10349337/

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