Question

使用以下代码将sqlite文件从asset文件夹复制到数据库文件夹。我在这里找到了这个例子 find CommonsWare's answer in this question
但我得到java.io.FileNotFoundException：/ file:/android_asset/pg558.sqlite（没有这样的文件或目录）

void copy() throws IOException {

    InputStream in =getApplicationContext().getAssets().open("pg558.sqlite");
    OutputStream out = new FileOutputStream("data/data/com.mireader/databases/MIBOOK");

    // Transfer bytes from in to out
    byte[] buf = new byte[1024];
    int len;
    while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    in.close();
    out.close();
}

Answer 1

请检查你的pg558.sqlite文件，我已经尝试过你的代码，它适用于我的文件。我将一个xml文件从assets /复制到/ mnt / sdcard /.

Answer 2

要将文件从资产文件夹复制到/ databases文件夹，请执行以下操作：

public static final String DATABASE_NAME = "data.db";


private void copyDatabaseFromAssets() {
    try {

        byte[] buffer = new byte[1024];
        OutputStream myOutput;
        int length;
        InputStream myInput;

        String DB_PATH = this.getDatabasePath(AppSettings.DATABASE_NAME).getAbsolutePath();

        AssetManager assetManager = getAssets();
        myInput = assetManager.open("databases/" + AppSettings.DATABASE_NAME);

        myOutput = new FileOutputStream(DB_PATH);
        while ((length = myInput.read(buffer)) > 0) {
            myOutput.write(buffer, 0, length);
        }
        myOutput.close();
        myOutput.flush();
        myInput.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

如何将文件从资产文件夹复制到android中的... / database文件夹

2 个答案: