当我通过 OTG usb 将闪存驱动器插入我的平板电脑或手机时，我正在制作一个 android 应用程序，它会将文件从它传输到指定位置。现在，如果我指定一个文件名，它将传输，但我怎样才能让它传输所有文件而不必指定一个名称？我正在使用带有字节数组的文件输入/文件输出。
@SuppressLint("SdCardPath")
公共类文件传输扩展 Activity {
Button btnsend;
String extstorage = Environment.getExternalStorageDirectory().toString();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activityfiletransfer);
btnsend = (Button) findViewById(R.id.button1);
final Runtime runtime = Runtime.getRuntime();
try
{
runtime.exec("su -c");
}
catch(Exception e)
{
}
btnsend.setOnClickListener(new View.OnClickListener()
{
Context context = getApplicationContext();
CharSequence scs = "Folder Doesn't Exist, Creating now, Checking for Flash Drive....";
CharSequence mvng = "Folder already exist, checking now for flash drive....";
CharSequence chk1 = "Flash Drive detected, transferring files now.";
CharSequence chk2 = "Flash Drive Is Not Detected";
int duration = Toast.LENGTH_SHORT;
Toast bldng = Toast.makeText(context, scs, duration);
Toast mvfldr = Toast.makeText(context, mvng, duration);
Toast chkffd = Toast.makeText(context, chk1, duration);
Toast chkffd2 = Toast.makeText(context, chk2, duration);
@Override
public void onClick(View arg0)
{
File src = new File(extstorage + "/FILEBACKUP");
File usbdrive = new File(extstorage + "/usbStorage/sda1");
if(!src.exists())
{
src.mkdirs();
bldng.show();
if(!usbdrive.exists())
{
chkffd2.show();
}
else
{
chkffd.show();
copyfiles();
}
}
else
{
mvfldr.show();
if(!usbdrive.exists())
{
chkffd2.show();
}
else
{
chkffd.show();
copyfiles();
}
}
}
private void copyfiles()
{
String pathofd = "/sdcard/usbStorage/sda1";
String internalpath = "/sdcard/FILEBACKUP";
File dir = new File(pathofd);
File[] files = dir.listFiles();
for (File afile : files)
{
if(afile.isFile())
{
copyFile(afile.getAbsolutePath(), internalpath, afile.getName());
}
}
try
{
}
/*OutputStream myoutput = new FileOutputStream("/sdcard/FILEBACKUP");
InputStream myinput = new FileInputStream("/sdcard/usbStorage/");
byte[] buffer = new byte[1024];
int length;
while((length=myinput.read(buffer))>0)
{
myoutput.write(buffer);
}
myoutput.flush();
myoutput.close();
myinput.close();
}*/
catch(Exception e)
{
}
}
private void copyFile(String absolutePath, String internalpath,
String name) {
// TODO Auto-generated method stub
try
{
OutputStream myoutput = new FileOutputStream(extstorage + "/FILEBACKUP/");
InputStream myinput = new FileInputStream(extstorage + "/usbStorage/sda1");
byte[] buffer = new byte[1024];
int length;
while((length=myinput.read(buffer))>0)
{
myoutput.write(buffer, 0, length);
}
myoutput.flush();
myoutput.close();
myinput.close();
}
catch(Exception e)
{
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activityfiletransfer,
menu);
return true;
}
}