I'm trying to save data fetched from a server to a file but I can't get it to work.
Can someone help me? And yes, I'm a newbie, just starting to learn Java.
Here is my JSON code...
JSONObject json = new JSONObject(str);
JSONArray data = json.getJSONArray("data");
for (int i = 0; i < data.length(); i++) {
JSONObject object = data.getJSONObject(i);
JSONObject category = object.getJSONObject("Category");
Category_ID.add(Long.parseLong(category.getString("Category_ID")));
Category_name.add(category.getString("Category_name"));
Category_image.add(category.getString("Category_image"));
Log.d("Category name", Category_name.get(i));
}
And here is the code where I am trying to save a file...
String FILENAME = "somefile";
String string = "hello world!";
FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();
FileInputStream fis = openFileInput(FILENAME);
fis.read(string);
fis.close();
Your code does not have any clue why and where it fails as commented by fge. But below is the code which can help you write to and read from a file. Please note it will read bytes from the file.
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class ReadWrite {
public static void main(String[] args) throws Exception {
String FILENAME = "data.dat";
String string = "hello world!";
FileOutputStream fos = new FileOutputStream(new File(FILENAME)); //openFileOutput(FILENAME); //, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();
FileInputStream fis = new FileInputStream(new File(FILENAME)); //(FILENAME);
byte[] b = new byte[100];
//fis.read(string);
fis.read(b);
fis.close();
System.out.println(b.toString());
}
}
Hope this will help
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.