我正在尝试让我的应用程序在启动时删除sdcard(带子文件夹)上的文件夹,但我不明白如何设置要删除的路径。
我创建了一个简单的Activity来删除这个文件夹,如下所示:
package org.android.test;
import java.io.File;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class DelSD extends Activity {
File dir = new File(android.os.Environment
.getExternalStorageDirectory().getPath(),
"/TEST");
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
void DeleteRecursive(File dir)
{
Log.d("DeleteRecursive", "DELETEPREVIOUS TOP" + dir.getPath());
if (dir.isDirectory())
{
String[] children = dir.list();
for (int i = 0; i < children.length; i++)
{
File temp = new File(dir, children[i]);
if(temp.isDirectory())
{
Log.d("DeleteRecursive", "Recursive Call" + temp.getPath());
DeleteRecursive(temp);
}
else
{
Log.d("DeleteRecursive", "Delete File" + temp.getPath());
boolean b = temp.delete();
if(b == false)
{
Log.d("DeleteRecursive", "DELETE FAIL");
}
}
}
dir.delete();
}
}
}
并添加到我的清单中:
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
但仍然没有去。 SD卡上的我的TEST文件夹仍在那里。我在模拟器和我的设备2.2上测试了这个Activity。
我不知道如何设置我的路径被删除:
File dir = new File(android.os.Environment
.getExternalStorageDirectory().getPath(),
"/TEST");
因为如果我将“dir”更改为其他内容,则“void DeleteRecursive(File dir)”不会抱怨“dir”未被设置!所以这根本不起作用。任何消化?
答案 0 :(得分:2)
import java.io.File;
class DeleteDir {
public static void main(String args[]) {
deleteDirectory(new File(args[0]));
}
static public boolean deleteDirectory(File path) {
if( path.exists() ) {
File[] files = path.listFiles();
for(int i=0; i<files.length; i++) {
if(files[i].isDirectory()) {
deleteDirectory(files[i]);
}
else {
files[i].delete();
}
}
}
return( path.delete() );
}
}
答案 1 :(得分:0)
试试这个:
public void DeleteFromSdCard() //Testing purpose only
{
File checkFile = new File("/sdcard/TEST/");
File[] lstFile;
if(checkFile.exists())
{
lstFile = checkFile.listFiles();
for(int i =0; i<lstFile.length;i++)
{
File file = lstFile[i];
file.delete();
}
}
}