我有一个文件夹,其中包含一些文件和一些目录,当我第一次启动应用程序时,我需要将它们复制到我的 SD 卡的 /mnt/sdcard/Android/data/ 路径,当然,如果还不是所需的文件夹不存在于该路径中。
我将在我的应用程序的 res/raw 文件夹中有这个文件夹。
我需要执行哪些分步程序才能将文件夹及其所有内容从 res/raw 复制到 SD 卡中的指定路径。
任何帮助深表感谢。
编辑
如果它可以帮助其他人,以下是解决方案:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
copyFileOrDir("edu1");//directory name in assets
}
File sdCard = Environment.getExternalStorageDirectory();
private void copyFileOrDir(String path) {
AssetManager assetManager = this.getAssets();
String assets[] = null;
try {
assets = assetManager.list(path);
if (assets.length == 0) {
copyFile(path);
} else {
File dir = new File (sdCard.getAbsolutePath() + "/" + "Android/data");
//String fullPath = "/data/data/" + this.getPackageName() + "/" + path;//path for storing internally to data/data
//File dir = new File(fullPath);
if (!dir.exists()){
System.out.println("Created directory"+sdCard.getAbsolutePath() + "/Android/data");
boolean result = dir.mkdir();
System.out.println("Result of directory creation"+result);
}
for (int i = 0; i < assets.length; ++i) {
copyFileOrDir(path + "/" + assets[i]);
}
}
} catch (IOException ex) {
System.out.println("Exception in copyFileOrDir"+ex);
}
}
private void copyFile(String filename) {
AssetManager assetManager = this.getAssets();
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(filename);
//String newFileName = "/data/data/" + this.getPackageName() + "/" + filename;//path for storing internally to data/data
String newFileName = sdCard.getAbsolutePath() + "/Android/data/" + filename;
out = new FileOutputStream(newFileName);
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
System.out.println("Exception in copyFile"+e);
}
}
}