Android:将文件从一个目录复制到另一个目录 [英] Android: copying files from one directory to another
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问题描述
我正在使用以下代码使用apache commons库将一个文件(临时音频文件)从源文件夹复制到目标文件夹为TT_1A。
I am working on copying one file (the temp audio file) from source folder to the destination folder as TT_1A using the following code with the use of apache commons library.
button1_save.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
String sourcePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TT/tt_temp.3gp";
File source = new File(sourcePath);
String descPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TT/tt_1A.3gp";
File desc = new File(descPath);
try
{
FileUtils.copyDirectory(source, desc);
}
catch (IOException e)
{
e.printStackTrace();
}
}
});
Apache Commons:
http://commons.apache.org/proper/commons-io/download_io.cgi
我使用了 FileUtils
函数,以便复制临时文件并粘贴到desc文件夹为TT_1A。然而logcat报告错误,具有以下详细信息:
I have used the FileUtils
function so as to copy the temp file and paste to the desc folder as TT_1A. Yet logcat reports error with the following details:
10-17 00:41:04.260: E/AndroidRuntime(27450): FATAL EXCEPTION: main
10-17 00:41:04.260: E/AndroidRuntime(27450): java.lang.NoClassDefFoundError: org.apache.commons.io.FileUtils
10-17 00:41:04.260: E/AndroidRuntime(27450): at com.abc.abc.TT_details_canton$14.onClick(TT_details_canton.java:575)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.view.View.performClick(View.java:4223)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.view.View$PerformClick.run(View.java:17275)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.os.Handler.handleCallback(Handler.java:615)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.os.Handler.dispatchMessage(Handler.java:92)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.os.Looper.loop(Looper.java:137)
10-17 00:41:04.260: E/AndroidRuntime(27450): at android.app.ActivityThread.main(ActivityThread.java:4898)
10-17 00:41:04.260: E/AndroidRuntime(27450): at java.lang.reflect.Method.invokeNative(Native Method)
10-17 00:41:04.260: E/AndroidRuntime(27450): at java.lang.reflect.Method.invoke(Method.java:511)
10-17 00:41:04.260: E/AndroidRuntime(27450): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
10-17 00:41:04.260: E/AndroidRuntime(27450): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
10-17 00:41:04.260: E/AndroidRuntime(27450): at dalvik.system.NativeStart.main(Native Method)
我已经坚持了这一整夜。有没有办法复制文件?
I have stucked by this for the whole night. Are there ways to copy files??
推荐答案
在以下方式修改后运行良好:
It runs good after amended in the following way:
button1_save.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
String sourcePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TongueTwister/tt_temp.3gp";
File source = new File(sourcePath);
String destinationPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TongueTwister/tt_1A.3gp";
File destination = new File(destinationPath);
try
{
FileUtils.copyFile(source, destination);
}
catch (IOException e)
{
e.printStackTrace();
}
}
});
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