如何以编程方式移动、复制和删除SD上的文件和目录？
如何以编程方式移动、复制和删除SD上的文件和目录？
提问于 2010-11-14 23:34:21
我想以编程方式移动，复制和删除SD卡上的文件和目录。我已经在谷歌上搜索过了，但是找不到任何有用的东西。
回答 11
Stack Overflow用户
回答已采纳
发布于 2010-11-14 23:38:18
Use standard Java I/O。使用Environment.getExternalStorageDirectory()进入外部存储(在某些设备上是SD卡)的根目录。
Stack Overflow用户
发布于 2012-07-04 19:02:27
在清单中设置正确的权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />下面是一个将以编程方式移动您的文件的函数
private void moveFile(String inputPath, String inputFile, String outputPath) {
InputStream in = null;
OutputStream out = null;
try {
//create output directory if it doesn't exist
File dir = new File (outputPath);
if (!dir.exists())
{
dir.mkdirs();
}
in = new FileInputStream(inputPath + inputFile);
out = new FileOutputStream(outputPath + inputFile);
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
in.close();
in = null;
// write the output file
out.flush();
out.close();
out = null;
// delete the original file
new File(inputPath + inputFile).delete();
}
catch (FileNotFoundException fnfe1) {
Log.e("tag", fnfe1.getMessage());
}
catch (Exception e) {
Log.e("tag", e.getMessage());
}
}要删除文件，请使用
private void deleteFile(String inputPath, String inputFile) {
try {
// delete the original file
new File(inputPath + inputFile).delete();
}
catch (Exception e) {
Log.e("tag", e.getMessage());
}
}复制
private void copyFile(String inputPath, String inputFile, String outputPath) {
InputStream in = null;
OutputStream out = null;
try {
//create output directory if it doesn't exist
File dir = new File (outputPath);
if (!dir.exists())
{
dir.mkdirs();
}
in = new FileInputStream(inputPath + inputFile);
out = new FileOutputStream(outputPath + inputFile);
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
in.close();
in = null;
// write the output file (You have now copied the file)
out.flush();
out.close();
out = null;
} catch (FileNotFoundException fnfe1) {
Log.e("tag", fnfe1.getMessage());
}
catch (Exception e) {
Log.e("tag", e.getMessage());
}
}Stack Overflow用户
发布于 2014-07-19 21:58:47
移动文件：
File from = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/kaic1/imagem.jpg");
File to = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/kaic2/imagem.jpg");
from.renameTo(to);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4178168
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