如何将数据从SQlite导出到CSV或Excel或什么？

Question

Doing research on how to export a database from SQLite, I already found the following code but was not able to make it work for me.

myDbAdapter.java:

public static void exportDB(Context context) {
    String databasePath = context.getDatabasePath(myDbHelper.DATABASE_NAME).getPath();
    String inFileName = databasePath;
    try {
        File dbFile = new File(inFileName);
        FileInputStream fis = new FileInputStream(dbFile);

        String outFileName = Environment.getExternalStorageDirectory() + "/" + myDbHelper.DATABASE_NAME;

        OutputStream output = new FileOutputStream(outFileName);

        byte[] buffer = new byte[1024];
        int length;
        while ((length = fis.read(buffer)) > 0) {
            output.write(buffer, 0, length);
        }
        //Close the streams
        output.flush();
        output.close();
        fis.close();
    } catch (Exception e) {
        Toast.makeText(context, "Export Failed", Toast.LENGTH_SHORT).show();
    }
}

MainActivity.java:

public void export(View view){
    helper.exportDB(getApplicationContext());
}

public static void main(String[] args){}

When I press the Export Button it says "Export Failed". Before I added the void main there was an error telling me that it is needed but I have no idea what to put into it. Additionally I don't think Environment.getExternalStorageDirectory() is the right way to find the directory since there is no SDCard in my Tablet. Any help appreciated!

Answer 1

You can setup any destination for output file by yourself

psThis code should not export anything. It just rewrite the same data.