Android中保存文件到内部存储器

 1     public static void saveDataToPrivateFile(Context context, String data, int mode, String fileName) {
 2         FileOutputStream fileOutputStream = null;
 3         BufferedWriter bufferedWriter = null;
 4 
 5         try {
 6             fileOutputStream = context.openFileOutput(fileName, mode);
 7             bufferedWriter = new BufferedWriter(new OutputStreamWriter(fileOutputStream));
 8             bufferedWriter.write(data);
 9         } catch (IOException e) {
10             e.printStackTrace();
11         } finally {
12             try {
13                 if (bufferedWriter != null) {
14                     bufferedWriter.close();
15                 }
16             } catch (IOException e) {
17                 e.printStackTrace();
18             }
19         }
20     }
21 
22     public static String loadDataFromPrivateFile(Context context, String fileName) {
23         FileInputStream fileInputStream = null;
24         BufferedReader bufferedReader = null;
25         StringBuilder stringBuilder = new StringBuilder();
26 
27         try {
28             fileInputStream = context.openFileInput(fileName);
29             bufferedReader = new BufferedReader(new InputStreamReader(fileInputStream));
30             String result = "";
31             while ((result = bufferedReader.readLine()) != null) {
32                 stringBuilder.append(result);
33             }
34         } catch (IOException e) {
35             e.printStackTrace();
36         } finally {
37             if (bufferedReader != null) {
38                 try {
39                     bufferedReader.close();
40                 } catch (IOException e) {
41                     e.printStackTrace();
42                 }
43             }
44         }
45 
46         return stringBuilder.toString();
47     }
48 
49     public static boolean deletePrivateFile(Context context, String fileName) {
50         try {
51             return context.deleteFile(fileName);
52         } catch (Exception e) {
53             e.printStackTrace();
54             return false;
55         }
56     }