Android數據庫SQLite日期不能為空

Question

我正在嘗試使用DatePicker使用日期字段更新SQLite數據庫。 為簡單起見（我個人）決定只將日期傳遞給String以僅使用String來更新數據庫（在這種情況下，我不希望執行任何DATETIME函數。

datbase可以正常工作（至少通過我設置的對話框），但是當將數據強制轉換為TextView時，什么也沒有出現，同時eclipse stacktrace報告以下內容：

05-09 22:47:30.164: E/SQLiteDatabase(3112): Error inserting chest=100 arms=android.widget.TextView@4125c110 legs=100 waist=100 weight=100
05-09 22:47:30.164: E/SQLiteDatabase(3112): android.database.sqlite.SQLiteConstraintException: personalStats.date may not be NULL (code 19)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:775)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at com.uhi.fatfighter.Stats.createEntry(Stats.java:86)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at com.uhi.fatfighter.MainActivity.onClick(MainActivity.java:250)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.view.View.performClick(View.java:4084)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.view.View$PerformClick.run(View.java:16966)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.os.Handler.handleCallback(Handler.java:615)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.os.Looper.loop(Looper.java:137)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at android.app.ActivityThread.main(ActivityThread.java:4928)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at java.lang.reflect.Method.invokeNative(Native Method)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at java.lang.reflect.Method.invoke(Method.java:511)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
05-09 22:47:30.164: E/SQLiteDatabase(3112):     at dalvik.system.NativeStart.main(Native Method)

下面是處理SQL的類：

public class Stats {

    public static final String KEY_ROWID = "_id";
    public static final String KEY_WEIGHT = "weight";
    public static final String KEY_WAIST = "waist";
    public static final String KEY_CHEST = "chest";
    public static final String KEY_LEGS = "legs";
    public static final String KEY_ARMS = "arms";
    public static final String KEY_DATE = "date";



    private static final String DATABASE_NAME = "statsDB";
    private static final String DATABASE_TABLE = "personalStats";
    private static final int DATABASE_VERSION = 4;

    private DbHelper ffHelper;
    private final Context ffContext;
    private SQLiteDatabase ffDatabase;

    private static class DbHelper extends SQLiteOpenHelper {

        public DbHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);

        }

        @Override
        public void onCreate(SQLiteDatabase db) {

            db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_WEIGHT
                    + " TEXT NOT NULL, " + KEY_WAIST + " TEXT NOT NULL, "
                    + KEY_CHEST + " TEXT NOT NULL, " + KEY_LEGS
                    + " TEXT NOT NULL, " + KEY_ARMS + " TEXT NOT NULL," 
                    + KEY_DATE + " TEXT NOT NULL);");

        }

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

        }
    }

    public Stats(Context c) {
        ffContext = c;
    }

    public Stats open() throws SQLException {
        ffHelper = new DbHelper(ffContext);
        ffDatabase = ffHelper.getWritableDatabase();
        return this;

    }

    public void close() {
        ffHelper.close();

    }

    public long createEntry(String weight, String waist, String chest, String legs, String arms, String date) {


        ContentValues cv = new ContentValues();
        cv.put(KEY_WEIGHT, weight);
        cv.put(KEY_WAIST, waist);
        cv.put(KEY_CHEST, chest);
        cv.put(KEY_LEGS, legs);
        cv.put(KEY_ARMS, arms);
        cv.put(KEY_ARMS, date);

        return ffDatabase.insert(DATABASE_TABLE, null, cv);

    }

    public String getData() {
        String[] columns = new String[] { KEY_ROWID, KEY_WEIGHT, KEY_WAIST, KEY_CHEST, KEY_LEGS, KEY_ARMS, KEY_DATE};
        Cursor c = ffDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        String result = "";
        int iRow = c.getColumnIndex(KEY_ROWID);
        int iWeight = c.getColumnIndex(KEY_WEIGHT);
        int iWaist = c.getColumnIndex(KEY_WAIST);
        int iChest = c.getColumnIndex(KEY_CHEST);
        int iLegs = c.getColumnIndex(KEY_LEGS);
        int iArms = c.getColumnIndex(KEY_ARMS);
        int iDate = c.getColumnIndex(KEY_DATE);

        for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
            result = result + c.getString(iRow) + " " + c.getString(iWeight)
                    + " " + c.getString(iWaist) 
                    + " " + c.getString(iChest) 
                    + " " + c.getString(iLegs) 
                    + " " + c.getString(iArms)
                    + " " + c.getString(iDate)+ "\n";

        }

        return result;
    }
}

視圖類：

public class DBView extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.view_stats);
        TextView tv = (TextView) findViewById(R.id.tvDBInfo);
        Stats dbInfo = new Stats(this);
        dbInfo.open();

        String data = dbInfo.getData();
        dbInfo.close();

            tv.setText(data);



    }

EditTexts和DatePicker在我的main_activity中，如果可以幫助我可以發帖嗎？

Answer 1

您將兩次相同的鍵放在內容值中。

 cv.put(KEY_ARMS, arms);
    cv.put(KEY_ARMS, date);

用：

    cv.put(KEY_ARMS, arms);
    cv.put(KEY_DATE, date);

Answer 2

您沒有在KEY_DATE插入任何KEY_DATE ，但KEY_DATE not null 。

Yu必須cv.put(KEY_DATE, date); 插入之前

Answer 3

不必將KEY_DATE列設置為“ TEXT NOT NULL”，而只需將其設置為普通的“ TEXT”即可。 您也可以在可能插入null或空值的任何其他列中執行此操作。