如何获得sqlite的路径，在资源文件夹？ [英] How to get the sqlite path, in asset folder?

问题描述

我这里是个初学者。

1.How可我打开一个 sqlite的数据库，它是存储在资产文件夹的Andr​​oid ？我有一个路径用来访问我的应用程序资产文件夹？

1.How can I open a Sqlite database, which is stored in the assets folder in Android? Which path I have to use to access to my app assets folder?

path = "file:///asset_folder/database.dat";
SQLiteDatabase db = null;
db = SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY);

2.How可我安装我的应用程序，或在第一次运行一个文件复制到内置存储器（ /数据/数据​​/...），其实我要一个文件夹中的assets`文件夹中复制到内存中的第一次运行。

2.How can I copy a file to the internal memory(/data/data/...) on installing my app or in the first run, actually I want to copy a folder inside the assets` folder into the internal memory on the first run.

推荐答案

我有同样的问题，让我感动的数据库文件到RES /原始文件夹，并访问它像这样：

I was having the same problem, so I moved the db file to the res/raw folder, and accessed it like so:

InputStream inputStream = getBaseContext().getResources().openRawResource(R.raw.mySQLiteFile);

然后我试图将文件移动到文件夹/data/data/com.mydomain.www/databases/，但由于目标路径不存在我会得到一个异常，所以我做了文件（destPath）.getParentFile（）的mkdir（）;

从那里，我叫了一份分贝方法到数据库传输到目标。

From there, I called a copy db method to transfer the db to the destination.

public void CopyDB(InputStream inputStream, OutputStream outputStream) throws IOException {
        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, length);
        }
        inputStream.close();
        outputStream.close();
    }

InputStream为数据库文件的OutputStream是的FileOutputStream（destPath）。

InputStream is the db file, OutputStream is the FileOutputStream(destPath).

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