FileSystem.java
3.95 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
* Copyright 2017 wugian
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.qnbar.smc.utils;
import android.os.Environment;
import com.telink.bluetooth.TelinkLog;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
public abstract class FileSystem {
public static boolean writeAsString(String fileName, String content) {
File dir = Environment.getExternalStorageDirectory();
File file = new File(dir, fileName);
FileWriter fw;
try {
if (!file.exists())
file.createNewFile();
fw = new FileWriter(file, false);
fw.write(content);
fw.flush();
fw.close();
return true;
} catch (IOException e) {
}
return false;
}
public static String readAsString(String fileName) {
File dir = Environment.getExternalStorageDirectory();
File file = new File(dir, fileName);
if (!file.exists())
return "";
try {
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
String line = null;
StringBuilder sb = new StringBuilder();
while ((line = br.readLine()) != null) {
sb.append(line);
}
br.close();
fr.close();
return sb.toString();
} catch (IOException e) {
}
return "";
}
public static boolean exists(String fileName) {
File directory = Environment.getExternalStorageDirectory();
File file = new File(directory, fileName);
return file.exists();
}
public static boolean writeAsObject(String fileName, Object obj) {
File dir = Environment.getExternalStorageDirectory();
File file = new File(dir, fileName);
FileOutputStream fos = null;
ObjectOutputStream ops = null;
boolean success = false;
try {
if (!file.exists())
file.createNewFile();
fos = new FileOutputStream(file);
ops = new ObjectOutputStream(fos);
ops.writeObject(obj);
ops.flush();
success = true;
} catch (IOException e) {
} finally {
try {
if (ops != null)
ops.close();
if (ops != null)
fos.close();
} catch (Exception e) {
}
}
return success;
}
public static Object readAsObject(String fileName) {
File dir = Environment.getExternalStorageDirectory();
File file = new File(dir, fileName);
if (!file.exists())
return null;
FileInputStream fis = null;
ObjectInputStream ois = null;
Object result = null;
try {
fis = new FileInputStream(file);
ois = new ObjectInputStream(fis);
result = ois.readObject();
} catch (IOException | ClassNotFoundException e) {
TelinkLog.w("read object error : ", e);
} finally {
try {
if (ois != null)
ois.close();
} catch (Exception e) {
}
}
return result;
}
}