Android SQLiteOpenHelper无法打开数据库文件

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我知道这个问题以前曾被讨论过。但是我找不到解决问题的办法,所以我要再问一次。创建数据库有问题。我复制了SQLiteOpenHelper的实现:

public class DBCreator extends SQLiteOpenHelper 
{
    private static final String DATABASE_NAME = "servision.db";
    private static final int DATABASE_VERSION = 1;


    private static final String INFO_TABLE ="create table INFO(key text,value text);";
    public static final String GATEWAYS_TABLE = "GATEWAYS";

    // Table name
    public static final String TABLE = "events";

    // Columns
    public static final String TIME = "time";
    public static final String TITLE = "title";

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

    @Override
    public void onCreate(SQLiteDatabase db) 
    {
        try
        {
            String gatewaytablescript ="create table" +GATEWAYS_TABLE+"(" +
            "id int primary key, " +
            "host text not null," +
            "port int not null," +
            "username text," +
            "password text,"+
            "useproxy int," +
            "proxyHost text," +
            "proxyPort port," +
            "desc text," +
            "secondaryip text," +
            "secondaryport int," +
            "timezone int," +
            "encryption int," +
            "customkey text" +
            ");";

            Log.d("DBCreator", "Creating " + GATEWAYS_TABLE + "table");
            db.execSQL(gatewaytablescript);

            String infotablescript ="create table " + INFO_TABLE + "(key text,value text);";
            Log.d("DBCreator", "Creating " + INFO_TABLE + "table");
            db.execSQL(infotablescript);

        }
        catch(SQLException ex)
        {
            Log.d("DBCreator", "onCreate exception " +ex.getMessage()); 
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) 
    {
        Log.d("EventsData", "onUpgrade");
        if (oldVersion >= newVersion)
            return;


    }
}

我是从创建方法的主活动中创建的,就像这样。

DBCreator db =new DBCreator(this);
db.getReadableDatabase();

在logcat中,我收到以下信息:

06-01 17:31:15.523: INFO/global(2470): Default buffer size used in BufferedInputStream constructor. It would be better to be explicit if an 8k buffer is required.
06-01 17:31:15.652: INFO/Database(4160): sqlite returned: error code = 14, msg = cannot open file at source line 25467
06-01 17:31:15.652: ERROR/Database(4160): sqlite3_open_v2("/data/data/com.servision.svclient/databases/servision.db", &handle, 6, NULL) failed
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160): Couldn't open servision.db for writing (will try read-only):
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160): android.database.sqlite.SQLiteException: unable to open database file
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1921)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:883)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:960)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:953)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:602)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:158)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at com.servision.svclient.Main.onCreate(Main.java:52)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.os.Looper.loop(Looper.java:123)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at java.lang.reflect.Method.invokeNative(Native Method)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at java.lang.reflect.Method.invoke(Method.java:521)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
06-01 17:31:15.722: ERROR/SQLiteOpenHelper(4160):     at dalvik.system.NativeStart.main(Native Method)
06-01 17:31:15.738: INFO/Database(4160): sqlite returned: error code = 14, msg = cannot open file at source line 25467
06-01 17:31:15.738: ERROR/Database(4160): sqlite3_open_v2("/data/data/com.servision.svclient/databases/servision.db", &handle, 1, NULL) failed

DBCreator的onCreate从未被调用过。我正在运行程序在GalaxyS上调试模式下从Eclipse。我是不是缺少了一些权限?可能是上下文不好还是什么?

提问于
用户回答回答于

检查清单添加中的权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
用户回答回答于

sqlite returned: error code = 14, msg = cannot open file at source line 25467sqlite3_open_v2("/data/data/com.servision.svclient/databases/servision.db", &handle, 1, NULL) failed错误,这似乎是在没有数据库的情况下造成的,而Android试图创建一个数据库。

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