android刪除文件操作方法:
/**
* 刪除文件夾以及目錄下的文件
* @param filePath 被刪除目錄的文件路徑
* @return 目錄刪除成功返回true,否則返回false
*/
public boolean deleteDirectory(String filePath) {
boolean flag = false;
//如果filePath不以文件分隔符結尾,自動添加文件分隔符
if (!filePath.endsWith(File.separator)) {
filePath = filePath + File.separator;
}
File dirFile = new File(filePath);
if (!dirFile.exists() || !dirFile.isDirectory()) {
return false;
}
flag = true;
File[] files = dirFile.listFiles();
//遍歷刪除文件夾下的所有文件(包括子目錄)
for (int i = 0; i < files.length; i++) {
if (files[i].isFile()) {
//刪除子文件
flag = deleteFile(files[i].getAbsolutePath());
if (!flag) break;
} else {
//刪除子目錄
flag = deleteDirectory(files[i].getAbsolutePath());
if (!flag) break;
}
}
if (!flag) return false;
//刪除當前空目錄
return dirFile.delete();
}
/**
* 根據路徑刪除指定的目錄或文件,無論存在與否
*@param filePath 要刪除的目錄或文件
*@return 刪除成功返回 true,否則返回 false。
*/
public boolean DeleteFolder(String filePath) {
File file = new File(filePath);
if (!file.exists()) {
return false;
} else {
if (file.isFile()) {
// 爲文件時調用刪除文件方法
return deleteFile(filePath);
} else {
// 爲目錄時調用刪除目錄方法
return deleteDirectory(filePath);
}
}
}
android 拷貝文件操作方法:
public void copyFile(File sourcefile, File targetFile) {
FileInputStream input = null;
BufferedInputStream inbuff = null;
FileOutputStream out = null;
BufferedOutputStream outbuff = null;
try {
input = new FileInputStream(sourcefile);
inbuff = new BufferedInputStream(input);
out = new FileOutputStream(targetFile);
outbuff = new BufferedOutputStream(out);
byte[] b = new byte[1024 * 5];
int len = 0;
while ((len = inbuff.read(b)) != -1) {
outbuff.write(b, 0, len);
}
outbuff.flush();
} catch (Exception ex) {
} finally {
try {
if (inbuff != null)
inbuff.close();
if (outbuff != null)
outbuff.close();
if (out != null)
out.close();
if (input != null)
input.close();
} catch (Exception ex) {
}
}
}
public boolean copyLast6Files(String srcDir, String dstDir) {
// (new File(dstDir)).mkdir();
Log.v(TAG, "" + dstDir.toString());
File[] files = (new File(srcDir)).listFiles();
List<File> listFiles = Arrays.asList(files);
Collections.sort(listFiles, new Comparator<File>() {
public final int compare(File aa, File ab) {
long sa = aa.lastModified();
long sb = ab.lastModified();
Log.v(TAG, "copyLast6Files success 1");
return (sa > sb) ? -1 : ((sa == sb) ? 0 : 1);
}
});
if (files.length <= 0)
Log.v(TAG, "dump failure qiu");
if (files.length >= 6) {
(new File(dstDir)).mkdir();
for (int i = 0; i < 6; ++i) {
File temp = listFiles.get(i);
copyFile(temp, new File(dstDir + temp.getName()));
}
Log.v(TAG, "copyLast6Files success 2");
return true;
} else {
Log.v(TAG, "copyLast6Files failure 2");
return false;
}
return false;
}