无法使用SQLiteAssetHelper打开存储在资产\\数据库中的SQLite数据库

Question

I am trying to use my SQLite database from assets/databases folder using SQLiteAssetHelper class but I am getting following error:-

09-25 01:34:53.007: E/SQLiteLog(1191): (14) cannot open file at line 30191 of [00bb9c9ce4]
09-25 01:34:53.007: E/SQLiteLog(1191): (14) os_unix.c:30191: (2) open(/data/data/com.sqlitetospinner1/databases/mydb.sqlite) - 
09-25 01:34:53.067: E/SQLiteDatabase(1191): Failed to open database '/data/data/com.sqlitetospinner1/databases/mydb.sqlite'.
09-25 01:34:53.067: E/SQLiteDatabase(1191): android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at com.crm.AssetsHelper.getAllColleges(AssetsHelper.java:37)
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at com.crm.Quote_Details.loadSpinnerData(Quote_Details.java:127)
09-25 01:34:53.067: E/SQLiteDatabase(1191):     at com.crm.Quote_Details.onCreate(Quote_Details.java:66)
09-25 01:34:53.067: W/SQLiteAssetHelper(1191): could not open database mydb.sqlite - unknown error (code 14): Could not open database
09-25 01:34:53.077: W/SQLiteAssetHelper(1191): copying database from assets...
09-25 01:34:53.207: E/SQLiteAssetHelper(1191): Couldn't open mydb.sqlite for writing (will try read-only):
09-25 01:34:53.207: E/SQLiteAssetHelper(1191): com.readystatesoftware.sqliteasset.SQLiteAssetException: Missing databases/mydb.sqlite.zip file in assets or target folder not writable
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at android.content.res.AssetManager.openAsset(Native Method)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at android.content.res.AssetManager.open(AssetManager.java:316)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at android.content.res.AssetManager.open(AssetManager.java:290)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.copyDatabaseFromAssets(SQLiteAssetHelper.java:376)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.createOrOpenDatabase(SQLiteAssetHelper.java:355)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getWritableDatabase(SQLiteAssetHelper.java:178)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getReadableDatabase(SQLiteAssetHelper.java:257)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.crm.AssetsHelper.getAllColleges(AssetsHelper.java:37)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.crm.Quote_Details.loadSpinnerData(Quote_Details.java:127)
09-25 01:34:53.207: E/SQLiteAssetHelper(1191):  at com.crm.Quote_Details.onCreate(Quote_Details.java:66)

This is my AssetHelper class:-

public class AssetsHelper extends SQLiteAssetHelper {

    private static final String DATABASE_NAME = "mydb.sqlite";
    private static final int DATABASE_VERSION = 1;

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

public List<String> getAllColleges(){
        List<String> colleges = new ArrayList<String>();

    String selectQuery = "SELECT * FROM colleges_list ORDER BY Organization_Name";

    // Below is line number 37
    SQLiteDatabase db = this.getReadableDatabase(); //Error comes from this line
    Cursor cursor = db.rawQuery(selectQuery, null);

        if (cursor.moveToFirst()) {
            do {
                colleges.add(cursor.getString(1));
            } while (cursor.moveToNext());
        }

        cursor.close();
        db.close();

        return colleges;
    }
}

I have already given these permissions in manifest :-

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

I have also went through lot of SO questions but none of them were helpful in my case.

UPDATE:- It used to work earlier but after I changed my db file with another db it stopped working.

Answer 1

Based on the diagnosis in comments, you're using an ancient version of the asset helper library and that is causing the problems.

The latest jar is linked on the project's github page .

Answer 2

You need to place your database in assets/databases folder.
SQLiteAssetHelper expects to find the prepopulated database file in databases folder under assets.

so the placement of the SQLite will be like this

assets/  
   databases/  
      mydb.sqlite  

And after it rebuild and reinstall the app and make sure the placement is right.