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javaandroidarraysstorageinternal

Read string array from internal storage

I have been searched on the forum for a while now, but can't find my question. I see a lot of examples of how to write a String Array to internal storage, but not how to read them again.

I have a String Array which is saved by: 

String FILENAME = "data1";
fos = openFileOutput(FILENAME, Context.MODE_APPEND);
for(int j=1;j<=PupilAmount;j++) {  
    fos.write(pup[j].getBytes());  
} 
fos.close();

But how do I read the variables again, and save it in a new variable on my new Activity?

Solution

  • A string array is serializable. So you can serialize it on a file

    FileOutputStream fout = openFileOutput(FILENAME, Context.MODE_APPEND);
ObjectOutputStream oos = new ObjectOutputStream(fout);
oos.writeObject(pup);
oos.close();

    and read back this way:

    FileInputStream fin = openFileInput(FILENAME, Context.MODE_APPEND);
ObjectInputStream ois = new ObjectInputStream(fin);
String[] pup = (String[]) ois.readObject();
ois.close()