我有一个网站数据（ftp 地址、用户名、密码、端口、homedir、url 等）的 SQLite 数据库。我可以将记录添加到表中，但似乎无法更新它们。
我创建了一个 SiteManager Activity，它加载每一行并从每一行创建一个 WebSite 对象。网站的属性被加载到 EditTexts。该人可以编辑属性，然后更新按钮应该更新表格行，但它不会。Logcat 没有给出任何错误，所以我完全不知所措，不知道从哪里开始。
public class SiteManager extends Activity {
private DBAdapter myDb;
private EditText siteManFTPAddress;
private EditText siteManFTPUsername;
private EditText siteManFTPPassword;
private EditText siteManFTPPort;
private EditText siteManURL;
private EditText siteManHome;
private ImageView favIcon;
public ListView site_list;
private Button openBtn;
private Button siteManUpdateBtn;
private int _rowId;
private String _name;
private String _remoteHomeDir;
private int _isLive;
private String _address;
private String _username;
private String _password;
private int _port;
private String _url;
private boolean _status = false;
private String siteFolder;
private List<WebSite> model = new ArrayList<WebSite>();
private ArrayAdapter<WebSite> adapter;
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.site_manager);
site_list = (ListView) findViewById(R.id.siteList);
adapter = new SiteAdapter(this, R.id.ftpsitename, R.layout.siterow,
model);
site_list.setAdapter(adapter);
addListeners();
openDb();
displayRecords();
}
public void addListeners() {
siteManFTPAddress = (EditText) findViewById(R.id.siteManFTPAdd);
siteManFTPUsername = (EditText) findViewById(R.id.siteManFTPUser);
siteManFTPPassword = (EditText) findViewById(R.id.siteManFTPPass);
siteManFTPPort = (EditText) findViewById(R.id.siteManFTPPort);
siteManURL = (EditText) findViewById(R.id.siteManURL);
siteManHome = (EditText) findViewById(R.id.siteManHome);
site_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, final View view,
int position, long id) {
File rootDir = new File(Environment
.getExternalStorageDirectory() + "/My Webs");
final WebSite item = (WebSite) parent
.getItemAtPosition(position);
_name = item.getName();
siteFolder = rootDir.toString() + "/" + _name;
_remoteHomeDir = item.getHomeDir();
_isLive = item.isLive();
String tmpaddress = item.getAddress();
_address = tmpaddress;
siteManFTPAddress.setText(_address);
String tmpuser = item.getUsername();
_username = tmpuser;
siteManFTPUsername.setText(_username);
String tmppass = item.getPassword();
_password = tmppass;
siteManFTPPassword.setText(_password);
int tmpport = item.getPort();
_port = tmpport;
String portString = Integer.toString(tmpport);
siteManFTPPort.setText(portString);
String tmpURL = item.getUrl();
_url = tmpURL;
siteManURL.setText(_url);
String tmpHome = item.getHomeDir();
_remoteHomeDir = tmpHome;
siteManURL.setText(_remoteHomeDir);
}
});
openBtn = (Button) findViewById(R.id.openSiteBtn);
openBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent returnResult = new Intent();
returnResult.putExtra("siteopen", "siteopen");
returnResult.putExtra("sitename", _name);
returnResult.putExtra("sitehome", siteFolder);
returnResult.putExtra("sitelive", _isLive);
returnResult.putExtra("siteremotehome", _remoteHomeDir);
returnResult.putExtra("siteaddress", _address);
returnResult.putExtra("siteusername", _username);
returnResult.putExtra("sitepassword", _password);
returnResult.putExtra("siteport", _port);
returnResult.putExtra("url", _url);
setResult(2, returnResult);
finish();
}
});
siteManUpdateBtn = (Button)findViewById(R.id.siteManFTPUpdate);
siteManUpdateBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
_address = siteManFTPAddress.getText().toString();
_username = siteManFTPUsername.getText().toString();
_password = siteManFTPPassword.getText().toString();
String port = siteManFTPPort.getText().toString();
_port = Integer.parseInt(port);
Toast.makeText(SiteManager.this, "Update", Toast.LENGTH_LONG).show();
myDb.updateRow(_rowId, _name, _name, _isLive, _address, _username, _password, _port, _url);
model.clear();
adapter.notifyDataSetChanged();
displayRecords();
}
});
}
private void openDb() {
myDb = new DBAdapter(this);
myDb.open();
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
closeDb();
}
private void closeDb() {
myDb.close();
}
public void displayRecords() {
Cursor cursor = myDb.getAllRows();
displayRecordSet(cursor);
}
protected void displayRecordSet(Cursor c) {
if (c.moveToFirst()) {
do {
int rowId = c.getInt(c.getColumnIndex(DBAdapter.KEY_ROWID));
_rowId = c.getInt(rowId);
int keyNameIndex = c.getColumnIndex(DBAdapter.KEY_NAME);
_name = c.getString(keyNameIndex);
int keyHomeIndex = c.getColumnIndex(DBAdapter.KEY_HOME);
_remoteHomeDir = c.getString(keyHomeIndex);
int keyLiveIndex = c.getColumnIndex(DBAdapter.KEY_LIVE);
_isLive = c.getInt(keyLiveIndex);
int keyAddressIndex = c.getColumnIndex(DBAdapter.KEY_ADDRESS);
_address = c.getString(keyAddressIndex);
int keyUsernameIndex = c.getColumnIndex(DBAdapter.KEY_USERNAME);
_username = c.getString(keyUsernameIndex);
int keyPassIndex = c.getColumnIndex(DBAdapter.KEY_PASSWORD);
_password = c.getString(keyPassIndex);
int keyPortIndex = c.getColumnIndex(DBAdapter.KEY_PORT);
_port = c.getInt(keyPortIndex);
int keyUrlIndex = c.getColumnIndexOrThrow(DBAdapter.KEY_URL);
_url = c.getString(keyUrlIndex);
WebSite sitesFromDB = new WebSite(_rowId, _name, _remoteHomeDir,
_isLive, _address, _username, _password, _port, _url);
model.add(sitesFromDB);
adapter.notifyDataSetChanged();
if(adapter.isEmpty()){
}
} while (c.moveToNext());
}
c.close();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
adapter.notifyDataSetChanged();
}
class SiteAdapter extends ArrayAdapter<WebSite> {
private final List<WebSite> objects;
private final Context context;
public SiteAdapter(Context context, int resource,
int textViewResourceId, List<WebSite> objects) {
super(context, R.id.sitename, R.layout.siterow, objects);
this.context = context;
this.objects = objects;
}
/** @return The number of items in the */
public int getCount() {
return objects.size();
}
public boolean areAllItemsSelectable() {
return false;
}
/** Use the array index as a unique id. */
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.siterow, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.sitename);
textView.setText(objects.get(position).getName());
return (rowView);
}
}
DBAdapter.java
public boolean updateRow(long rowId, String name, String homedir,
int islive, String address, String username, String password,
int port, String url) {
String where = KEY_ROWID + "=" + rowId;
/*
* CHANGE 4:
*/
// TODO: Update data in the row with new fields.
// TODO: Also change the function's arguments to be what you need!
// Create row's data:
ContentValues newValues = new ContentValues();
newValues.put(KEY_NAME, name);
newValues.put(KEY_HOME, homedir);
newValues.put(KEY_LIVE, islive);
newValues.put(KEY_ADDRESS, address);
newValues.put(KEY_USERNAME, username);
newValues.put(KEY_PASSWORD, password);
newValues.put(KEY_PORT, port);
newValues.put(KEY_URL, url);
// newValues.put(KEY_PASSIVE, passive);
// Insert it into the database.
return db.update(DATABASE_TABLE, newValues, where, null) != 0;
}