Android Open Source - AndroidToDoList I O Manager2

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.todolist;
/*from  w w w .j av  a  2s.  c  om*/
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.lang.reflect.Type;
import java.util.ArrayList;

import android.app.Activity;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class IOManager2 extends Activity {
  private static final String FILENAME = "file.sav";
  
  public void loadFromFile(ArrayList<todoItem> arrayList) {
    if(arrayList == null) {
      arrayList = new ArrayList<todoItem>();
    }
    try {
      FileInputStream fis = openFileInput(FILENAME);
      BufferedReader in = new BufferedReader(new InputStreamReader(fis));      
      //From http://www.javacreed.com/simple-gson-example/
      Gson gson = new Gson();
      Type ListType = new TypeToken<ArrayList<todoItem>>() {}.getType();
      arrayList = gson.fromJson(in, ListType);
    } catch (FileNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  
  public void saveInFile(ArrayList<todoItem> arrayList) {
    try {
      FileOutputStream fos = openFileOutput(FILENAME,0);
      Gson gson = new Gson();
      OutputStreamWriter osw = new OutputStreamWriter(fos);
      gson.toJson(arrayList, osw);
      osw.flush();
      osw.close();
    } catch (FileNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
}

Java Source Code List

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