1 import java.io.File;
2 import java.io.FileOutputStream;
3 import java.io.IOException;
4 import java.io.InputStream;
5 import java.io.OutputStream;
6 import java.util.ArrayList;
7 import java.util.List;
8
9 import android.os.Environment;
10
11 import com.androidmediaplayer.model.Mp3Info;
12
13 public class FileUtil {
14
15 /**
16 * 得到当前外部存储设备的目录
17 */
18 private static String SDCardRoot = Environment
19 .getExternalStorageDirectory().getAbsolutePath() + File.separator;
20
21 /**
22 * 在SD卡上创建文件
23 *
24 * @throws IOException
25 */
26 public static File createFileInSDCard(String fileName, String dir)
27 throws IOException {
28 if (isFileExist(fileName, dir)) {
29 deleteFile(dir, fileName);
30 }
31 File file = new File(SDCardRoot + dir + File.separator + fileName);
32 file.createNewFile();
33 return file;
34 }
35
36 /**
37 * 在SD卡上创建目录
38 *
39 * @param dirName
40 */
41 public static File creatSDDir(String dir) {
42 File dirFile = new File(SDCardRoot + dir + File.separator);
43 dirFile.mkdirs();
44 return dirFile;
45 }
46
47 /**
48 * 删除SD卡上的文件
49 *
50 * @param dir
51 * 文件夹目录(已包含根目录)
52 * @param fileName
53 * 文件名
54 * @return
55 * @throws IOException
56 */
57 public static boolean deleteFile(String dir, String fileName)
58 throws IOException {
59 File dirFile = new File(SDCardRoot + dir + File.separator + fileName);
60 return dirFile.delete();
61 }
62
63 /**
64 * 删除_data路径的文件
65 *
66 * @param _data
67 * @return
68 */
69 public static boolean deleteAnotherFile(String _data) throws IOException {
70 File dirFile = new File(_data);
71 return dirFile.delete();
72 }
73
74 /**
75 * 判断SD卡上的文件是否存在
76 */
77 public static boolean isFileExist(String fileName, String path) {
78 File file = new File(SDCardRoot + path + File.separator + fileName);
79 return file.exists();
80 }
81
82 public static boolean _isFileExist(String fileName) {
83 File file = new File(SDCardRoot + "mp3" + File.separator + fileName);
84 return file.exists();
85 }
86
87 /**
88 *
89 * @param path 路径加文件名加后缀
90 * @return
91 */
92 public static boolean _isFileExist2(String path){
93 File file = new File(path);
94 return file.exists();
95 }
96
97 /**
98 * 判断SD卡上的文件夹是否存在
99 */
100 public static boolean isFilePathExist(String path) {
101 File file = new File(SDCardRoot + path);
102 return file.exists();
103 }
104
105 public static String getFilePath(String fileName) {
106 return SDCardRoot + "mp3" + File.separator + fileName;
107 }
108
109 public static void updateFileName(File file, String finalFileName) {
110 String path = file.getAbsolutePath();
111 String orgFileName = path.substring(0, path.lastIndexOf("/") + 1)
112 + finalFileName;
113 file.renameTo(new File(orgFileName));
114 }
115
116 /**
117 * 将一个InputStream里面的数据写入到SD卡中
118 */
119 public static File write2SDFromInput(String path, String fileName,
120 InputStream inPutStream) {
121 File file = null;
122 OutputStream outPutStream = null;
123 try {
124 creatSDDir(path);
125 file = createFileInSDCard(fileName, path);
126 outPutStream = new FileOutputStream(file);
127 byte buffer[] = new byte[64];
128 int temp;
129 while ((temp = inPutStream.read(buffer)) != -1) {
130 outPutStream.write(buffer, 0, temp);
131 }
132 outPutStream.flush();
133 } catch (Exception e) {
134 e.printStackTrace();
135 } finally {
136 try {
137 if (outPutStream != null) {
138 outPutStream.close();
139 }
140 } catch (Exception e) {
141 e.printStackTrace();
142 }
143 }
144 return file;
145 }
146
147 /**
148 * 读取目录中的MP3文件的名字和大小
149 */
150 public static List<Mp3Info> getMp3Files(String path) {
151 ArrayList<Mp3Info> mp3Infos = new ArrayList<Mp3Info>();
152 File file = new File(SDCardRoot + File.separator + path);
153 File[] files = file.listFiles();
154 Mp3Info mp3Info = null;
155 int length = files.length;
156 for (int i = 0; i < length; i++) {
157 if (files[i].getName().endsWith("mp3")) {
158 mp3Info = new Mp3Info();
159 mp3Info.setMp3Name(files[i].getName());
160 mp3Info.setMp3Size(String.valueOf(files[i].length()));
161 String[] temp = mp3Info.getMp3Name().split("\\.");
162 String lrcName = temp[0] + ".lrc";
163 mp3Info.setLrcName(lrcName);
164 mp3Infos.add(mp3Info);
165 }
166 }
167 return mp3Infos;
168 }
169
170 }
