http://blog.csdn.net/etzmico/article/details/7786525
/**
* 複製單個文件
* @param oldPath String 原文件路徑 如:c:/fqf.txt
* @param newPath String 複製後路徑 如:f:/fqf.txt
* @return boolean
*/
public void copyFile(String oldPath, String newPath) {
try {
int bytesum = 0;
int byteread = 0;
File oldfile = new File(oldPath);
if (oldfile.exists()) { //文件存在時
InputStream inStream = new FileInputStream(oldPath); //讀入原文件
FileOutputStream fs = new FileOutputStream(newPath);
byte[] buffer = new byte[1444];
int length;
while ( (byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; //字節數 文件大小
System.out.println(bytesum);
fs.write(buffer, 0, byteread);
}
inStream.close();
}
}
catch (Exception e) {
System.out.println("複製單個文件操作出錯");
e.printStackTrace();
}
}
/**
* 複製整個文件夾內容
* @param oldPath String 原文件路徑 如:c:/fqf
* @param newPath String 複製後路徑 如:f:/fqf/ff
* @return boolean
*/
public void copyFolder(String oldPath, String newPath) {
try {
(new File(newPath)).mkdirs(); //如果文件夾不存在 則建立新文件夾
File a=new File(oldPath);
String[] file=a.list();
File temp=null;
for (int i = 0; i < file.length; i++) {
if(oldPath.endsWith(File.separator)){
temp=new File(oldPath+file[i]);
}
else{
temp=new File(oldPath+File.separator+file[i]);
}
if(temp.isFile()){
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(newPath + "/" +
(temp.getName()).toString());
byte[] b = new byte[1024 * 5];
int len;
while ( (len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if(temp.isDirectory()){//如果是子文件夾
copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
}
}
}
catch (Exception e) {
System.out.println("複製整個文件夾內容操作出錯");
e.printStackTrace();
}
}
PS:
拷貝assets目錄下文件
- InputStream is = ctx.getAssets().open("test.apk");
特別感謝jqj1107提的建議,寫代碼時要謹慎,儘可能不使用try/catch,拷貝文件時檢查文件屬性等參數,確保萬無一失
- if (!oldfile.exists()) {return ;}
- if (!oldfile.isFile()) {return ;}
- if (!oldfile.canRead()) {return ;}