Android 读写文件的第一种方式（文件方式）

 1 public void save() {
 2     String data = "Data to save";
 3     FileOutputStream out = null;
 4     BufferedWriter writer = null;
 5     try {
 6     out = openFileOutput("data", Context.MODE_PRIVATE);
 7     writer = new BufferedWriter(new OutputStreamWriter(out));
 8     writer.write(data);
 9     } catch (IOException e) {
10         e.printStackTrace();
11     } finally {
12     try {
13     if (writer != null) {
14     writer.close();
15     }
16     } catch (IOException e) {
17 e.printStackTrace();
18 }
19 }
20 }                

 1 public String load() {
 2 FileInputStream in = null;
 3 BufferedReader reader = null;
 4 StringBuilder content = new StringBuilder();
 5 try {
 6 in = openFileInput("data");
 7 reader = new BufferedReader(new InputStreamReader(in));
 8 String line = "";
 9 while ((line = reader.readLine()) != null) {
10 content.append(line);
11 }
12 } catch (IOException e) {
13 e.printStackTrace();
14 } finally {
15 if (reader != null) {
16 try {
17 reader.close();
18 } catch (IOException e) {
19 e.printStackTrace();
20 }
21 }
22 }
23 return content.toString();
24 }