我有一个apk“/system/app/Gallery2.apk”的路径,我想在sdcard上复制它。我实现了复制方法
public void copy(File src, File dst) throws IOException {
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dst);
// 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();
}
但它显示IOException
我传递值
try {
File file =new File( pm.getApplicationInfo(TAG_PACKAGE.get(position),PackageManager.GET_META_DATA).publicSourceDir);
Toast.makeText(MainActivity.this , pm.getApplicationInfo(TAG_PACKAGE.get(position),PackageManager.GET_META_DATA).publicSourceDir, Toast.LENGTH_LONG).show();
try {
File dir = new File(Environment.getExternalStorageDirectory() + "/foldername/");
if(!dir.exists())
{
if(dir.mkdir()) ;//directory is created;
Toast.makeText(MainActivity.this ,dir.toString(), Toast.LENGTH_LONG).show();
}
copy(file.getAbsoluteFile(), dir);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
例外:
exception java.io.FileNotFoundException: /storage/sdcard0/folder: open failed: EISDIR (Is a directory)
它没有用,thnks
答案 0 :(得分:1)
看起来您正在尝试将文件复制到文件夹,但未指定目标文件名。
我想你想把文件名附加到目标路径:
copy(file.getAbsoluteFile(), new File(dir, file.getName()));