如何使一个APK创建的SD卡文件安装APK什么时候？ [英] How do you make an apk create a file on the sdcard when the apk is installed?

问题描述

我很新的android开发并正在寻找一种方式来修改现有的Eclipse中源 - code，这样在安装APK时，XML文件是从里面APK复制到特定的文件夹上外置储存。

I am very new to android development and am looking for a way to modify existing source-code in eclipse so that when the apk is installed, an xml file is copied from inside the apk to a specific folder on the external storage.

有没有办法做到这一点？

Is there a way to do this?

推荐答案

查看问题和答案在这里... <一个href=\"http://stackoverflow.com/questions/3851712/android-how-to-create-a-directory-on-the-sd-card-and-copy-files-from-res-raw-to\">Android:如何创建对SD卡的目录和/ RES文件拷贝/生吧？

See the question and answer here...Android: How to create a directory on the SD Card and copy files from /res/raw to it??

修改：关于它的思考，我用/资产的文件夹，而不是/ RES /生。这大约是我做什么...

EDIT: Thinking about it, I use the /assets folder and not /res/raw. This is roughly what I do...

首先得到你的外部存储（通常是SD卡）...

First get a valid folder on your external storage (normally SD card)...

File myFilesDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/com.mycompany.myApp/files");

替换 com.mycompany.myApp 在上面的应用程序的包名称的路径。

Replace com.mycompany.myApp in the path above with your app's package name.

那么下面将所有文件从资源文件夹复制与文件名以XYZ开头，例如，xyz123.txt，xyz456.xml等。

Then the following will copy all files from the assets folder with filenames beginning with "xyz", e.g., xyz123.txt, xyz456.xml etc.

try {
    AssetManager am = getAssets();
    String[] list = am.list("");
    for (String s:list) {
        if (s.startsWith("xyz")) {
            Log.d(TAG, "Copying asset file " + s);
            InputStream inStream = am.open(s);
            int size = inStream.available();
            byte[] buffer = new byte[size];
            inStream.read(buffer);
            inStream.close();
            FileOutputStream fos = new FileOutputStream(myFilesDir + "/" + s);
            fos.write(buffer);
            fos.close();
        }
    }
}
catch (Exception e) {
    // Better to handle specific exceptions such as IOException etc
    // as this is just a catch-all
}

请注意，您需要以下权限在AndroidManifest.xml文件...

Note you'll need the following permission in the AndroidManifest.xml file...

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

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