无法在Android Pie（Android 9）中打开数据库 [英] Unable to open database in Android Pie (Android 9)

问题描述

我使用checkDataBase函数来确保数据库是否已经存在，以避免每次您在Oreo中打开应用程序时都重新复制文件。

I used checkDataBase function to ensure if the database already exist to avoid re-copying the file each time you open the application in Oreo. But in Android Pie it is not working.

private boolean checkDataBase (String dbName, int dbVersion) {

    SQLiteDatabase checkDB = null;

    try {

        String myPath = DB_PATH + dbName;
        checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.CONFLICT_ABORT);

        if (checkDB.getVersion() < dbVersion) {
            Timber.d("Delete database called");
            myContext.deleteDatabase(dbName);
            return false;
        }
    } catch(SQLiteException e) {

    }

    if(checkDB != null){
        checkDB.close();
    }

    return checkDB != null;
}

出现此错误：os_unix.c：36667 ：（2）打开（/data/data/my.androidPieTrial.app/databases/admin.db）
android.database.sqlite.SQLiteCantOpenDatabaseException：未知错误（代码14 SQLITE_CANTOPEN）：无法打开数据库

Getting this error: os_unix.c:36667: (2) open(/data/data/my.androidPieTrial.app/databases/admin.db) android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14 SQLITE_CANTOPEN): Could not open database

推荐答案

我得到了解决方案。在Android Oreo及以下版本中，我访问db的方式运行良好，但在Android Pie中却无法使用。这是在Android Pie中处理它的方式。

I got the solution. In Android Oreo and below version, the way i am accessing db works fine but in Android Pie it wasn't working.This is the way to handle it in Android Pie.

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        MySQLiteOpenHelper helper = new MySQLiteOpenHelper();
        SQLiteDatabase database = helper.getReadableDatabase();
        myPath = database.getPath();

    } else {
        String DB_PATH = Environment.getDataDirectory() + "/data/my.trial.app/databases/";
        myPath = DB_PATH + dbName;
    }

    checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
    checkDB.disableWriteAheadLogging();

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