6.29增加漏掉的依赖文件 :
import android.text.TextUtils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
public class FileUtils {
public final static String FILE_EXTENSION_SEPARATOR = ".";
private FileUtils() {
throw new AssertionError();
}
/**
* read file
*
* @param filePath
* @return if file not exist, return null, else return content of file
* @throws RuntimeException if an error occurs while operator BufferedReader
*/
public static String readFile(String filePath) {
String fileContent = "";
File file = new File(filePath);
if (!file.isFile()) {
return null;
}
BufferedReader reader = null;
try {
InputStreamReader is = new InputStreamReader(new FileInputStream(file));
reader = new BufferedReader(is);
String line;
while ((line = reader.readLine()) != null) {
fileContent += line + " ";
}
reader.close();
return fileContent;
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return fileContent;
}
/**
* write file
*
* @param filePath
* @param content
* @param append is append, if true, write to the end of file, else clear content of file and write into it
* @return return false if content is empty, true otherwise
* @throws RuntimeException if an error occurs while operator FileWriter
*/
public static boolean writeFile(String filePath, String content, boolean append) {
if (filePath == null || filePath.length() == 0) {
return false;
}
FileWriter fileWriter = null;
try {
makeDirs(filePath);
fileWriter = new FileWriter(filePath, append);
fileWriter.write(content);
fileWriter.close();
return true;
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
} finally {
if (fileWriter != null) {
try {
fileWriter.close();
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
}
}
}
}
/**
* write file
*
* @param filePath
* @param contentList
* @param append is append, if true, write to the end of file, else clear content of file and write into it
* @return return false if contentList is empty, true otherwise
* @throws RuntimeException if an error occurs while operator FileWriter
*/
public static boolean writeFile(String filePath, List<String> contentList, boolean append) {
if (contentList == null || contentList.size() == 0) {
return false;
}
FileWriter fileWriter = null;
try {
makeDirs(filePath);
fileWriter = new FileWriter(filePath, append);
int i = 0;
for (String line : contentList) {
if (i++ > 0) {
fileWriter.write("\r\n");
}
fileWriter.write(line);
}
fileWriter.close();
return true;
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
} finally {
if (fileWriter != null) {
try {
fileWriter.close();
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
}
}
}
}
/**
* write file, the string will be written to the begin of the file
*
* @param filePath
* @param content
* @return
*/
public static boolean writeFile(String filePath, String content) {
return writeFile(filePath, content, false);
}
/**
* write file, the string list will be written to the begin of the file
*
* @param filePath
* @param contentList
* @return
*/
public static boolean writeFile(String filePath, List<String> contentList) {
return writeFile(filePath, contentList, false);
}
/**
* write file, the bytes will be written to the begin of the file
*
* @param filePath
* @param stream
* @return
* @see {@link #writeFile(String, InputStream, boolean)}
*/
public static boolean writeFile(String filePath, InputStream stream) {
return writeFile(filePath, stream, false);
}
/**
* write file
*
* @param stream the input stream
* @param append if <code>true</code>, then bytes will be written to the end of the file rather than the beginning
* @return return true
* @throws RuntimeException if an error occurs while operator FileOutputStream
*/
public static boolean writeFile(String filePath, InputStream stream, boolean append) {
return writeFile(filePath != null ? new File(filePath) : null, stream, append);
}
/**
* write file, the bytes will be written to the begin of the file
*
* @param file
* @param stream
* @return
* @see {@link #writeFile(File, InputStream, boolean)}
*/
public static boolean writeFile(File file, InputStream stream) {
return writeFile(file, stream, false);
}
/**
* write file
*
* @param file the file to be opened for writing.
* @param stream the input stream
* @param append if <code>true</code>, then bytes will be written to the end of the file rather than the beginning
* @return return true
* @throws RuntimeException if an error occurs while operator FileOutputStream
*/
public static boolean writeFile(File file, InputStream stream, boolean append) {
OutputStream o = null;
try {
makeDirs(file.getAbsolutePath());
o = new FileOutputStream(file, append);
byte data[] = new byte[1024];
int length = -1;
while ((length = stream.read(data)) != -1) {
o.write(data, 0, length);
}
o.flush();
return true;
} catch (FileNotFoundException e) {
throw new RuntimeException("FileNotFoundException occurred. ", e);
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
} finally {
if (o != null) {
try {
o.close();
stream.close();
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
}
}
}
}
/**
* move file
*
* @param sourceFilePath
* @param destFilePath
*/
public static void moveFile(String sourceFilePath, String destFilePath) {
if (TextUtils.isEmpty(sourceFilePath) || TextUtils.isEmpty(destFilePath)) {
throw new RuntimeException("Both sourceFilePath and destFilePath cannot be null.");
}
moveFile(new File(sourceFilePath), new File(destFilePath));
}
/**
* move file
*
* @param srcFile
* @param destFile
*/
public static void moveFile(File srcFile, File destFile) {
boolean rename = srcFile.renameTo(destFile);
if (!rename) {
copyFile(srcFile.getAbsolutePath(), destFile.getAbsolutePath());
deleteFile(srcFile.getAbsolutePath());
}
}
/**
* copy file
*
* @param sourceFilePath
* @param destFilePath
* @return
* @throws RuntimeException if an error occurs while operator FileOutputStream
*/
public static boolean copyFile(String sourceFilePath, String destFilePath) {
InputStream inputStream = null;
try {
inputStream = new FileInputStream(sourceFilePath);
} catch (FileNotFoundException e) {
throw new RuntimeException("FileNotFoundException occurred. ", e);
}
return writeFile(destFilePath, inputStream);
}
/**
* read file to string list, a element of list is a line
*
* @param filePath
* @param charsetName The name of a supported {@link java.nio.charset.Charset </code>charset<code>}
* @return if file not exist, return null, else return content of file
* @throws RuntimeException if an error occurs while operator BufferedReader
*/
public static List<String> readFileToList(String filePath, String charsetName) {
File file = new File(filePath);
List<String> fileContent = new ArrayList<String>();
if (file == null || !file.isFile()) {
return null;
}
BufferedReader reader = null;
try {
InputStreamReader is = new InputStreamReader(new FileInputStream(file), charsetName);
reader = new BufferedReader(is);
String line = null;
while ((line = reader.readLine()) != null) {
fileContent.add(line);
}
reader.close();
return fileContent;
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
throw new RuntimeException("IOException occurred. ", e);
}
}
}
}
/**
* get file name from path, not include suffix
* <p/>
* getFileNameWithoutExtension(null) = null
* getFileNameWithoutExtension("") = ""
* getFileNameWithoutExtension(" ") = " "
* getFileNameWithoutExtension("abc") = "abc"
* getFileNameWithoutExtension("a.mp3") = "a"
* getFileNameWithoutExtension("a.b.rmvb") = "a.b"
* getFileNameWithoutExtension("c:\\") = ""
* getFileNameWithoutExtension("c:\\a") = "a"
* getFileNameWithoutExtension("c:\\a.b") = "a"
* getFileNameWithoutExtension("c:a.txt\\a") = "a"
* getFileNameWithoutExtension("/home/admin") = "admin"
* getFileNameWithoutExtension("/home/admin/a.txt/b.mp3") = "b"
*
* @param filePath
* @return file name from path, not include suffix
* @see
*/
public static String getFileNameWithoutExtension(String filePath) {
if (filePath == null || filePath.length() == 0) {
return filePath;
}
int extenPosi = filePath.lastIndexOf(FILE_EXTENSION_SEPARATOR);
int filePosi = filePath.lastIndexOf(File.separator);
if (filePosi == -1) {
return (extenPosi == -1 ? filePath : filePath.substring(0, extenPosi));
}
if (extenPosi == -1) {
return filePath.substring(filePosi + 1);
}
return (filePosi < extenPosi ? filePath.substring(filePosi + 1, extenPosi) : filePath.substring(filePosi + 1));
}
/**
* get file name from path, include suffix
* <p/>
* getFileName(null) = null
* getFileName("") = ""
* getFileName(" ") = " "
* getFileName("a.mp3") = "a.mp3"
* getFileName("a.b.rmvb") = "a.b.rmvb"
* getFileName("abc") = "abc"
* getFileName("c:\\") = ""
* getFileName("c:\\a") = "a"
* getFileName("c:\\a.b") = "a.b"
* getFileName("c:a.txt\\a") = "a"
* getFileName("/home/admin") = "admin"
* getFileName("/home/admin/a.txt/b.mp3") = "b.mp3"
*
* @param filePath
* @return file name from path, include suffix
*/
public static String getFileName(String filePath) {
if (filePath == null || filePath.length() == 0) {
return filePath;
}
int filePosi = filePath.lastIndexOf(File.separator);
return (filePosi == -1) ? filePath : filePath.substring(filePosi + 1);
}
/**
* get folder name from path
* <p/>
* getFolderName(null) = null
* getFolderName("") = ""
* getFolderName(" ") = ""
* getFolderName("a.mp3") = ""
* getFolderName("a.b.rmvb") = ""
* getFolderName("abc") = ""
* getFolderName("c:\\") = "c:"
* getFolderName("c:\\a") = "c:"
* getFolderName("c:\\a.b") = "c:"
* getFolderName("c:a.txt\\a") = "c:a.txt"
* getFolderName("c:a\\b\\c\\d.txt") = "c:a\\b\\c"
* getFolderName("/home/admin") = "/home"
* getFolderName("/home/admin/a.txt/b.mp3") = "/home/admin/a.txt"
*
* @param filePath
* @return
*/
public static String getFolderName(String filePath) {
if (filePath == null || filePath.length() == 0) {
return filePath;
}
int filePosi = filePath.lastIndexOf(File.separator);
return (filePosi == -1) ? "" : filePath.substring(0, filePosi);
}
/**
* get suffix of file from path
* <p/>
* getFileExtension(null) = ""
* getFileExtension("") = ""
* getFileExtension(" ") = " "
* getFileExtension("a.mp3") = "mp3"
* getFileExtension("a.b.rmvb") = "rmvb"
* getFileExtension("abc") = ""
* getFileExtension("c:\\") = ""
* getFileExtension("c:\\a") = ""
* getFileExtension("c:\\a.b") = "b"
* getFileExtension("c:a.txt\\a") = ""
* getFileExtension("/home/admin") = ""
* getFileExtension("/home/admin/a.txt/b") = ""
* getFileExtension("/home/admin/a.txt/b.mp3") = "mp3"
*
* @param filePath
* @return
*/
public static String getFileExtension(String filePath) {
if (filePath == null || filePath.trim().length() == 0) {
return filePath;
}
int extenPosi = filePath.lastIndexOf(FILE_EXTENSION_SEPARATOR);
int filePosi = filePath.lastIndexOf(File.separator);
if (extenPosi == -1) {
return "";
}
return (filePosi >= extenPosi) ? "" : filePath.substring(extenPosi + 1);
}
/**
* Creates the directory named by the trailing filename of this file, including the complete directory path required
* to create this directory.
* Attentions:
* makeDirs("C:\\Users\\Trinea") can only create users folder
* makeFolder("C:\\Users\\Trinea\\") can create Trinea folder
*
* @param filePath
* @return true if the necessary directories have been created or the target directory already exists, false one of
* the directories can not be created.
* if {@link FileUtils#getFolderName(String)} return null, return false
* if target directory already exists, return true
* return {@link java.io.File#makeFolder}
*/
public static boolean makeDirs(String filePath) {
String folderName = getFolderName(filePath);
if (filePath == null || filePath.length() == 0) {
return false;
}
File folder = new File(folderName);
return (folder.exists() && folder.isDirectory()) ? true : folder.mkdirs();
}
/**
* @param filePath
* @return
* @see #makeDirs(String)
*/
public static boolean makeFolders(String filePath) {
return makeDirs(filePath);
}
/**
* Indicates if this file represents a file on the underlying file system.
*
* @param filePath
* @return
*/
public static boolean isFileExist(String filePath) {
if (filePath == null || filePath.trim().length() == 0) {
return false;
}
File file = new File(filePath);
return (file.exists() && file.isFile());
}
/**
* Indicates if this file represents a directory on the underlying file system.
*
* @param directoryPath
* @return
*/
public static boolean isFolderExist(String directoryPath) {
if (directoryPath == null || directoryPath.trim().length() == 0) {
return false;
}
File dire = new File(directoryPath);
return (dire.exists() && dire.isDirectory());
}
/**
* delete file or directory
*
* if path is null or empty, return tru
* if path not exist, return true
* if path exist, delete recursion. return true
*
* @param path
* @return
*/
public static boolean deleteFile(String path) {
if (path == null || path.trim().length() == 0) {
return true;
}
File file = new File(path);
if (!file.exists()) {
return true;
}
if (file.isFile()) {
return file.delete();
}
if (!file.isDirectory()) {
return false;
}
for (File f : file.listFiles()) {
if (f.isFile()) {
f.delete();
} else if (f.isDirectory()) {
deleteFile(f.getAbsolutePath());
}
}
return file.delete();
}
/**
* get file size
* if path is null or empty, return -1
* <if path exist and it is a file, return file size, else return -1
*
* @param path
* @return returns the length of this file in bytes. returns -1 if the file does not exist.
*/
public static long getFileSize(String path) {
if (path == null || path.trim().length() == 0) {
return -1;
}
File file = new File(path);
return (file.exists() && file.isFile() ? file.length() : -1);
}
}
本来之前用UUID获取是没有问题的
原文章地址 : Unity功能记录(二十) ------ 获取Android与ios唯一设备标识码UUID
但是呢,突然所有华为设备获取到的UUID都是一致的,虽然不知道是什么原因导致的,因此改成以下方法:
import android.content.Context;
import android.os.Environment;
import android.provider.Settings;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.UUID;
public class UniversalID {
private static String filePath = File.separator + "UTips" + File.separator + "UUID";
public static String getUniversalID(Context context) {
String androidId;
String fileRootPath = getPath(context) + filePath;
String uuid = FileUtils.readFile(fileRootPath);
if (uuid == null || uuid.equals("")) {
androidId = "" + Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.ANDROID_ID);
try {
if (!"9774d56d682e549c".equals(androidId)) {
uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8")).toString();
} else {
uuid = UUID.randomUUID().toString();
}
} catch (Exception e) {
uuid = UUID.randomUUID().toString();
}
if(!uuid.equals("")){
saveUUID(context,uuid);
}
}
return uuid;
}
private static void saveUUID(Context context, String UUID) {
String ExternalSdCardPath = getExternalSdCardPath() + filePath;
FileUtils.writeFile(ExternalSdCardPath, UUID);
String InnerPath = context.getFilesDir().getAbsolutePath() + filePath;
FileUtils.writeFile(InnerPath,UUID);
}
public static String getPath(Context context) {
//首先判断是否有外部存储卡，如没有判断是否有内部存储卡，如没有，继续读取应用程序所在存储
String phonePicsPath = getExternalSdCardPath();
if (phonePicsPath == null) {
phonePicsPath = context.getFilesDir().getAbsolutePath();
}
return phonePicsPath;
}
/**
* 遍历 "system/etc/vold.fstab” 文件，获取全部的Android的挂载点信息
*
* @return
*/
private static ArrayList<String> getDevMountList() {
String[] toSearch = FileUtils.readFile("/system/etc/vold.fstab").split(" ");
ArrayList<String> out = new ArrayList<>();
for (int i = 0; i < toSearch.length; i++) {
if (toSearch[i].contains("dev_mount")) {
if (new File(toSearch[i + 2]).exists()) {
out.add(toSearch[i + 2]);
}
}
}
return out;
}
/**
* 获取扩展SD卡存储目录
* <p/>
* 如果有外接的SD卡，并且已挂载，则返回这个外置SD卡目录
* 否则：返回内置SD卡目录
*
* @return
*/
public static String getExternalSdCardPath() {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File sdCardFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
return sdCardFile.getAbsolutePath();
}
String path = null;
File sdCardFile = null;
ArrayList<String> devMountList = getDevMountList();
for (String devMount : devMountList) {
File file = new File(devMount);
if (file.isDirectory() && file.canWrite()) {
path = file.getAbsolutePath();
String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
File testWritable = new File(path, "test_" + timeStamp);
if (testWritable.mkdirs()) {
testWritable.delete();
} else {
path = null;
}
}
}
if (path != null) {
sdCardFile = new File(path);
return sdCardFile.getAbsolutePath();
}
return null;
}
}
已测试过vivo/小米/华为三款手机,无论是重启还是卸载重装,获取到的UUID是一致的
参考网站 :
如何唯一的标识一台Android设备?
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