我有一个 ViewPager，在第二页，我有一个连接 Ftp 的表单。当我按下连接按钮时，它会用另一个片段（ftp 列表文件夹）替换片段。我不知道如何将 FTPClient 对象从一个片段传递到另一个片段。有什么建议吗？
MainActivity.java
public class MainActivity extends FragmentActivity {
FileAdapter adapter = null;
int mColor = 0;
File[] files = null;
File mCurrentFile = null;
List<File> lfiles = null;
public List<FTPFile> lftpFiles = null;
ViewPager pager = null;
// ListView lv = null;
RelativeLayout ftp = null;
List<Fragment> fragments = null;
private boolean mCountdown = false;// Se pone a true cuando se le pica una
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewpager);
fragments = new Vector<Fragment>();
fragments.add(Fragment.instantiate(this, LocalFragment.class.getName()));
fragments.add(Fragment.instantiate(this, FtpFragment.class.getName()));
fragments.add(Fragment.instantiate(this, CreditsFragment.class.getName()));
ViewPagerAdapter mPagerAdapter = new ViewPagerAdapter(
super.getSupportFragmentManager(), fragments);
pager = (ViewPager) super.findViewById(R.id.viewpager);
pager.setAdapter(mPagerAdapter);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && pager.getCurrentItem() == 0) {
File parent = ((LocalFragment) fragments.get(0)).mCurrentFile.getParentFile();
if (parent != null) {
((LocalFragment) fragments.get(0)).updateDirectory(parent);
((LocalFragment) fragments.get(0)).mCurrentFile = parent;
mCountdown = false;
} else {// estamos a la raiz, desplegamos un toast
Toast.makeText(getApplicationContext(),"Ya esta a la raiz, pica de nuevo para salir",
Toast.LENGTH_SHORT).show();
if (mCountdown == false) {
mCountdown = true;
} else
finish();
}
} else if (keyCode == KeyEvent.KEYCODE_BACK && pager.getCurrentItem() != 0){
return super.onKeyDown(keyCode, event);
}
else{
return false; // return super.onKeyDown(keyCode, event);
}
return true;
}
// pager.setCurrentItem(0, true);
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_settings:
Intent i = new Intent(this, ExploradorPreference.class);
startActivity(i);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
FtpFragment.java
public class FtpFragment extends Fragment {
public FileAdapter adapter;
Context mContext;
List<File> lfiles = null;
File[] files = null;
File mCurrentFile = null;
ListView lv = null;
int mColor = 0;
String server = null;
String user = null;
String pass = null;
FTPClient ftpClient=null;
FtpListFragment ftpList = null;
List<FTPFile> ftpLstDir = null;
List<FTPFile> ftpLstFiles =null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = getActivity();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.ftp, container, false);
Button b = (Button) v.findViewById(R.id.connect);
EditText txtServer = (EditText) v.findViewById(R.id.TxtServidor);
EditText txtUser = (EditText) v.findViewById(R.id.TxtUser);
EditText txtPass = (EditText) v.findViewById(R.id.TxtPass);
txtServer.setText("ftpperso.free.fr");
txtUser.setText("fleur.de.lotus");
txtPass.setText("9sz07jd0");
server = ((EditText) v.findViewById(R.id.TxtServidor)).getText()
.toString();
user = ((EditText) v.findViewById(R.id.TxtUser)).getText().toString();
pass = ((EditText) v.findViewById(R.id.TxtPass)).getText().toString();
ftpList = new FtpListFragment();
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (server.equalsIgnoreCase("") || user.equalsIgnoreCase("")
|| pass.equalsIgnoreCase("")) {
Toast.makeText(mContext,
"A lo menos un campo no esta lleno", Toast.LENGTH_LONG).show();
} else {
boolean conectionOk = ftpConnect(server, user, pass);
if (conectionOk) {
Toast.makeText(mContext, "Conexion Succeed", Toast.LENGTH_LONG).show();
try {
String toppath = new String();
FTPFile[] ftpDirs = ftpClient.listDirectories();
FTPFile[] ftpdirs2 = ftpClient.listFiles(toppath);
ftpLstDir = Arrays.asList(ftpDirs);
ftpLstFiles = Arrays.asList(ftpdirs2);
}
// Remplazar el fragento
final FragmentManager fm = getActivity().getSupportFragmentManager();
final FragmentTransaction ft = fm.beginTransaction();
// We can also animate the changing of fragment
ft.setCustomAnimations(android.R.anim.slide_in_left,android.R.anim.slide_out_right);
ft.replace(R.id.ftp_fragment_form, ftpList);
ft.setTransition(FragmentTransaction.TRANSIT_EXIT_MASK);
ft.commit();
}catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(mContext, "Conexion Failed", Toast.LENGTH_LONG).show();
}
}
}
});
return v;
}
public boolean ftpConnect(String server, String loginName, String password) {
try {
ftpClient = new FTPClient();
ftpClient.connect(InetAddress.getByName(server));
ftpClient.setFileTransferMode(FTPClient.BINARY_FILE_TYPE);
ftpClient.enterLocalPassiveMode();
ftpClient.login(loginName, password);
System.out.println("status :: " + ftpClient.getStatus());
System.out.println("status :: " + ftpClient.getReplyString());
System.out.println("status :: " + ftpClient.getStatus());
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
public void onDestroyView() {
try{
ftpClient.logout();
ftpClient.disconnect();
Log.d("DISCONNECT","Desconectando");
super.onDestroyView();
}catch (IOException e){
System.out.println(e.getMessage());
}
}
FtpListFragment.java
public class FtpListFragment extends ListFragment {
public FtpFileAdapter adapter;
List<FTPFile> lfiles=null;
Context mContext;
FTPClient ftpClient = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = getActivity();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.ftplist, container, false);
lfiles = new ArrayList<FTPFile>();
try {
// I'd like to get my ftpClient object from the FtpFragment !
}catch (Exception e) {
e.printStackTrace();
}
adapter = new FtpFileAdapter(mContext, lfiles);
setListAdapter(adapter);
return v;
}
}