Android File data storage

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6     <EditText 
 7         android:id="@+id/write_edit"
 8         android:layout_width="fill_parent"
 9         android:layout_height="wrap_content"
10         android:lines="4"
11         android:gravity="top"
12         />
13     <Button 
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:text="Save"
17         android:onClick="writeFile"
18         />
19     <EditText 
20         android:layout_width="fill_parent"
21         android:layout_height="wrap_content"
22         android:lines="4"
23         android:id="@+id/read_edit"
24         android:gravity="top"
25         android:editable="false"
26         android:focusable="false"
27         />
28     <Button 
29         android:layout_width="wrap_content"
30         android:layout_height="wrap_content"
31         android:text="Read"
32         android:onClick="readFile"
33         />
34 </LinearLayout>

 

1 package com. turboradio. activity;
2
3 import java. io. FileInputStream;
4 import java. io. FileNotFoundException;
5 import java. io. FileOutputStream;
6 import java. io. IOException;
7
8 import android. app. Activity;
9 import android. OS. Bundle;
10 import android. view. View;
11 import android. widget. EditText;
12
13 public class FileSaveActivity extends Activity {
14 // file name
15 private static final String FILE_NAME = "temp.txt ";
16 private EditText writeEdit;
17 private EditText readEdit;
18 @ Override
19 protected void onCreate (Bundle savedInstanceState ){
20 super. onCreate (savedInstanceState );
21 setContentView (R. layout. file_save );
22 writeEdit = (EditText) findViewById (R. id. write_edit );
23 readEdit = (EditText) findViewById (R. id. read_edit );
24}
25 /**
26 * write files
27 */
28 public void writeFile (View v ){
29 write (writeEdit. getText (). toString ());
30}
31 /**
32 * read files
33 */
34 public void readFile (View v ){
35 readEdit. setText (read ());
36}
37 private String read (){
38 try {
39 FileInputStream FCM = openFileInput (FILE_NAME );
40 byte [] bytes = new byte [1, 1024];
41. read (bytes );
42 return new String (bytes );
43} catch (FileNotFoundException e ){
44 e. printStackTrace ();
45} catch (IOException e ){
46 // TODO Auto-generated catch block
47 e. printStackTrace ();
48}
49 return null;
50}
51 private void write (String content ){
52 try {
53 FileOutputStream fos = openFileOutput (FILE_NAME, MODE_APPEND );
54 fos. write (content. getBytes ());
55 fos. close ();
56} catch (FileNotFoundException e ){
57 e. printStackTrace ();
58} catch (IOException e ){
59 e. printStackTrace ();
60}
61}
62}