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
|
public class SharedUtil {
private final static String FILE_NAME = "data_save";
private final static String KEY = "data";
/**
* desc:保存对象
* @param context
* @param key
* @param obj
* modified:
*/
public static void saveObject(Context context,Object obj){
try {
// 保存对象
SharedPreferences.Editor sharedata = context.getSharedPreferences(FILENAME, 0).edit();
//先将序列化结果写到byte缓存中，其实就分配一个内存空间
ByteArrayOutputStream bos=new ByteArrayOutputStream();
ObjectOutputStream os=new ObjectOutputStream(bos);
//将对象序列化写入byte缓存
os.writeObject(obj);
//将序列化的数据转为16进制保存
String bytesToHexString = bytesToHexString(bos.toByteArray());
//保存该16进制数组
sharedata.putString(KEY, bytesToHexString);
sharedata.commit();
} catch (Exception e) {
}
}
/**
* desc:将数组转为16进制
* @param bArray
* @return
* modified:
*/
public static String bytesToHexString(byte[] bArray) {
if(bArray == null){
return null;
}
if(bArray.length == 0){
return "";
}
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i < bArray.length; i++) {
sTemp = Integer.toHexString(0xFF & bArray[i]);
if (sTemp.length() < 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
/**
* desc:获取保存的Object对象
* @param context
* @param key
* @return
* modified:
*/
public static Object readObject(Context context){
try {
SharedPreferences sharedata = context.getSharedPreferences(FILENAME, 0);
if (sharedata.contains(KEY)) {
String string = sharedata.getString(KEY, "");
if(TextUtils.isEmpty(string)){
return null;
}else{
//将16进制的数据转为数组，准备反序列化
byte[] stringToBytes = StringToBytes(string);
ByteArrayInputStream bis=new ByteArrayInputStream(stringToBytes);
ObjectInputStream is=new ObjectInputStream(bis);
//返回反序列化得到的对象
Object readObject = is.readObject();
return readObject;
}
}
} catch (Exception e) {
}
//所有异常返回null
return null;
}
/**
* desc:将16进制的数据转为数组
* <p>创建人：聂旭阳 , 2014-5-25 上午11:08:33</p>
* @param data
* @return
* modified:
*/
public static byte[] StringToBytes(String data){
String hexString=data.toUpperCase().trim();
if (hexString.length()%2!=0) {
return null;
}
byte[] retData=new byte[hexString.length()/2];
for(int i=0;i<hexString.length();i++)
{
int int_ch; // 两位16进制数转化后的10进制数
char hex_char1 = hexString.charAt(i); ////两位16进制数中的第一位(高位*16)
int int_ch3;
if(hex_char1 >= '0' && hex_char1 <='9')
int_ch3 = (hex_char1-48)*16; //// 0 的Ascll - 48
else if(hex_char1 >= 'A' && hex_char1 <='F')
int_ch3 = (hex_char1-55)*16; //// A 的Ascll - 65
else
return null;
i++;
char hex_char2 = hexString.charAt(i); ///两位16进制数中的第二位(低位)
int int_ch4;
if(hex_char2 >= '0' && hex_char2 <='9')
int_ch4 = (hex_char2-48); //// 0 的Ascll - 48
else if(hex_char2 >= 'A' && hex_char2 <='F')
int_ch4 = hex_char2-55; //// A 的Ascll - 65
else
return null;
int_ch = int_ch3+int_ch4;
retData[i/2]=(byte) int_ch;//将转化后的数放入Byte里
}
return retData;
}
}
|
