我想使用下面的代码删除 sdcard 中的文件,但是没有删除,大家能给提点建议吗?
public void onClick(DialogInterface dialog, int which) {
File dir = new File (Environment.getExternalStorageDirectory() + "/MyApp/MyFolder");
if (dir.isDirectory())
{
File file = new File(card.imagePath);
file.delete();
}