我正在使用 ASYNTask。而且我使用了自定义进度条。它在旋转一段时间后停止工作，然后出现一个空白（黑色）屏幕 2 秒，然后我的下一个屏幕的 UI 加载。
public class LoginActivity extends Activity {
/** Variable define here. */
private EditText metLoginUserName, metLoginPassword;
private Button mbtnLogin;
private ImageView ivRegister;
private String Host, username, password;
private int Port;
private UserChatActivity xmppClient;
public static ArrayList<String> all_user = new ArrayList<String>();
public static CustomProgressDialog mCustomProgressDialog;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loginlayout);
metLoginUserName = (EditText) this.findViewById(R.id.etLoginUserName);
metLoginPassword = (EditText) this.findViewById(R.id.etLoginPassword);
mbtnLogin = (Button) findViewById(R.id.btnLogin);
ivRegister = (ImageView) findViewById(R.id.ivRegister);
/** Set the hint in username and password edittext */
metLoginUserName = CCMStaticMethod.setHintEditText(metLoginUserName,
getString(R.string.hint_username), true);
metLoginPassword = CCMStaticMethod.setHintEditText(metLoginPassword,
getString(R.string.hint_password), true);
/** Click on login button */
mbtnLogin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
/** Login Activity */
username = metLoginUserName.getText().toString();
password = metLoginPassword.getText().toString();
CCMStaticVariable.musername = username;
CCMStaticVariable.musername = password;
if(CCMStaticMethod.isInternetAvailable(LoginActivity.this)){
LoginUserTask loginUserTask = new LoginUserTask(v.getContext());
loginUserTask.execute();
}
}
});
/** Click on forgot button */
this.findViewById(R.id.ivForgot).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(LoginActivity.this,
ForgotPassActivity.class));
}
});
/** Click on register button */
ivRegister.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(LoginActivity.this,
RegisterActivity.class));
}
});
}
public class LoginUserTask extends AsyncTask<Void, Void, XMPPConnection> {
public LoginUserTask(Context context) {
super();
this.context = context;
}
private Context context;
@Override
protected void onPostExecute(XMPPConnection result) {
if (result != null) {
/**Start services*/
startService(new Intent(LoginActivity.this, UpdaterService.class));
/**Call usermenu activity*/
finish();
startActivity(new Intent(LoginActivity.this,UserMenuActivity.class));
} else {
DialogInterface.OnClickListener LoginUnSuccessOkAlertListener = new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
};
CCMStaticMethod.showAlert(context, "Login",
"Invalid Username or Password. Try Again !", R.drawable.unsuccess,
true, true, "Ok", LoginUnSuccessOkAlertListener, null,
null);
}
mCustomProgressDialog.dismiss();
}
@Override
protected void onPreExecute() {
mCustomProgressDialog = CustomProgressDialog.createDialog(
LoginActivity.this, "", "");
mCustomProgressDialog.show();
}
@Override
protected XMPPConnection doInBackground(Void... params) {
CCMStaticVariable.CommonConnection = XMPPConn.checkXMPPConnection(username,
password);
return CCMStaticVariable.CommonConnection;
}
}
}
用户菜单活动
public class UserMenuActivity extends ExpandableListActivity {
private XMPPConnection connection;
String name,availability,subscriptionStatus;
TextView tv_Status;
public static final String ACTION_UPDATE = "ACTION_UPDATE";
/** Variable Define here */
private String[] data = { "View my profile", "New Multiperson Chat",
"New Broad Cast Message", "New Contact Category", "New Group",
"Invite to CCM", "Search", "Expand All", "Settings", "Help",
"Close" };
private String[] data_Contact = { "Rename Category","Move Contact to Category", "View my profile",
"New Multiperson Chat", "New Broad Cast Message",
"New Contact Category", "New Group", "Invite to CCM", "Search",
"Expand All", "Settings", "Help", "Close" };
private String[] data_child_contact = { "Open chat", "Delete Contact","View my profile",
"New Multiperson Chat", "New Broad Cast Message",
"New Contact Category", "New Group", "Invite to CCM", "Search",
"Expand All", "Settings", "Help", "Close" };
private String[] menuItem = { "Chats", "Contacts", "CGM Groups", "Pending","Request" };
private List<String> menuItemList = Arrays.asList(menuItem);
private int commonGroupPosition = 0;
private String etAlertVal;
private DatabaseHelper dbHelper;
private int categoryID, listPos;
/** New Code here.. */
private ArrayList<String> groupNames;
private ArrayList<ArrayList<ChildItems>> childs;
private UserMenuAdapter adapter;
private Object object;
private CustomProgressDialog mCustomProgressDialog;
private String[] data2 = { "PIN Michelle", "IP Call" };
private ListView mlist2;
private ImageButton mimBtnMenu;
private LinearLayout mllpopmenu;
private View popupView;
private PopupWindow popupWindow;
private AlertDialog.Builder alert;
private EditText input;
private TextView mtvUserName, mtvUserTagLine;
private ExpandableListView mExpandableListView;
public static List<CategoryDataClass> categoryList;
public static ArrayList<String> chatUser;
private boolean menuType = false;
private String childValContact="";
public static Context context;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.usermenulayout);
dbHelper = new DatabaseHelper(UserMenuActivity.this);
XMPPConn.getContactList();
connection = CCMStaticVariable.CommonConnection;
registerReceiver(UpdateList, new IntentFilter(ACTION_UPDATE));
}
@Override
public void onBackPressed() {
if (mllpopmenu.getVisibility() == View.VISIBLE) {
mllpopmenu.setVisibility(View.INVISIBLE);
} else {
if (CCMStaticVariable.CommonConnection.isConnected()) {
CCMStaticVariable.CommonConnection.disconnect();
}
super.onBackPressed();
}
}
@SuppressWarnings("unchecked")
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU) {
if (mllpopmenu.getVisibility() == View.VISIBLE) {
mllpopmenu.setVisibility(View.INVISIBLE);
} else {
if (commonGroupPosition >= 4 && menuType == true) {
if(childValContact == ""){
mllpopmenu.setVisibility(View.VISIBLE);
mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
R.layout.listviewtext, R.id.tvMenuText,
data_Contact));
}else{
mllpopmenu.setVisibility(View.VISIBLE);
mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
R.layout.listviewtext, R.id.tvMenuText,
data_child_contact));
}
} else if (commonGroupPosition == 0) {
mllpopmenu.setVisibility(View.VISIBLE);
mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
R.layout.listviewtext, R.id.tvMenuText, data));
}
}
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
protected void onResume() {
super.onResume();
mCustomProgressDialog = CustomProgressDialog.createDialog(
UserMenuActivity.this, "", "");
mCustomProgressDialog.show();
new Thread(){
public void run() {
XMPPConn.getContactList();
expendableHandle.sendEmptyMessage(0);
};
}.start();
super.onResume();
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
unregisterReceiver(UpdateList);
}
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
if(groupPosition == 0){
Intent intent = new Intent(UserMenuActivity.this,UserChatActivity.class);
intent.putExtra("userNameVal",chatUser.get(childPosition));
intent.putExtra("message","");
startActivity(intent);
}else if (groupPosition == 1 && childPosition == 0) {
startActivity(new Intent(UserMenuActivity.this,
InvitetoCCMActivity.class));
} else if (groupPosition == 1 && childPosition != 0) {
Intent intent = new Intent(UserMenuActivity.this,
UserChatActivity.class);
intent.putExtra("userNameVal",
XMPPConn.mfriendList.get(childPosition - 1).friendName);
intent.putExtra("message","");
startActivity(intent);
} else if (groupPosition == 2 && childPosition == 0) {
startActivity(new Intent(UserMenuActivity.this,
CreateGroupActivity.class));
} else if (groupPosition == 2 && childPosition != 0) {
String GROUP_NAME = childs.get(groupPosition).get(childPosition)
.getName().toString();
int end = GROUP_NAME.indexOf("(");
CCMStaticVariable.groupName = GROUP_NAME.substring(0, end).trim();
startActivity(new Intent(UserMenuActivity.this,
GroupsActivity.class));
} else if (groupPosition >= 4) {
childValContact = childs.get(groupPosition).get(childPosition).getName().trim();
showToast("user==>"+childValContact, 0);
}
return false;
}
private void setExpandableListView() {
/***###############GROUP ARRAY ############################*/
final ArrayList<String> groupNames = new ArrayList<String>();
chatUser = dbHelper.getChatUser();
groupNames.add("Chats ("+chatUser.size()+")");
groupNames.add("Contacts (" + XMPPConn.mfriendList.size() + ")");
groupNames.add("CGM Groups (" + XMPPConn.mGroupList.size() + ")");
groupNames.add("Pending (1)");
XMPPConn.getGroup();
categoryList = dbHelper.getAllCategory();
/**Group From Sever*/
if (XMPPConn.mGroupList.size() > 0) {
for (int g = 0; g < XMPPConn.mGroupList.size(); g++) {
XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName);
groupNames.add(XMPPConn.mGroupList.get(g).groupName + "("
+ XMPPConn.mGroupContactList.size()+ ")");
}
}
if(categoryList.size() > 0){
for (int cat = 0; cat < categoryList.size(); cat++) {
groupNames.add(categoryList.get(cat).getCategoryName()+ "(0)");
}
}
this.groupNames = groupNames;
/*** ###########CHILD ARRAY * #################*/
ArrayList<ArrayList<ChildItems>> childs = new ArrayList<ArrayList<ChildItems>>();
ArrayList<ChildItems> child = new ArrayList<ChildItems>();
if(chatUser.size() > 0){
for(int i = 0; i < chatUser.size(); i++){
child.add(new ChildItems(userName(chatUser.get(i)), "",0,null));
}
}else{
child.add(new ChildItems("--No History--", "",0,null));
}
childs.add(child);
child = new ArrayList<ChildItems>();
child.add(new ChildItems("", "",0,null));
if (XMPPConn.mfriendList.size() > 0) {
for (int n = 0; n < XMPPConn.mfriendList.size(); n++) {
child.add(new ChildItems(XMPPConn.mfriendList.get(n).friendNickName,
XMPPConn.mfriendList.get(n).friendStatus,
XMPPConn.mfriendList.get(n).friendState,
XMPPConn.mfriendList.get(n).friendPic));
}
}
childs.add(child);
/************** CGM Group Child here *********************/
child = new ArrayList<ChildItems>();
child.add(new ChildItems("", "",0,null));
if (XMPPConn.mGroupList.size() > 0) {
for (int grop = 0; grop < XMPPConn.mGroupList.size(); grop++) {
child.add(new ChildItems(
XMPPConn.mGroupList.get(grop).groupName + " ("
+ XMPPConn.mGroupList.get(grop).groupUserCount
+ ")", "",0,null));
}
}
childs.add(child);
child = new ArrayList<ChildItems>();
child.add(new ChildItems("Shuchi",
"Pending (Waiting for Authorization)",0,null));
childs.add(child);
/************************ Group Contact List *************************/
if (XMPPConn.mGroupList.size() > 0) {
for (int g = 0; g < XMPPConn.mGroupList.size(); g++) {
/** Contact List */
XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName);
child = new ArrayList<ChildItems>();
for (int con = 0; con < XMPPConn.mGroupContactList.size(); con++) {
child.add(new ChildItems(
XMPPConn.mGroupContactList.get(con).friendName,
XMPPConn.mGroupContactList.get(con).friendStatus,0,null));
}
childs.add(child);
}
}
if(categoryList.size() > 0){
for (int cat = 0; cat < categoryList.size(); cat++) {
child = new ArrayList<ChildItems>();
child.add(new ChildItems("-none-", "",0,null));
childs.add(child);
}
}
this.childs = childs;
/** Set Adapter here */
adapter = new UserMenuAdapter(this, groupNames, childs);
setListAdapter(adapter);
object = this;
mlist2 = (ListView) findViewById(R.id.list2);
mimBtnMenu = (ImageButton) findViewById(R.id.imBtnMenu);
mllpopmenu = (LinearLayout) findViewById(R.id.llpopmenu);
mtvUserName = (TextView) findViewById(R.id.tvUserName);
mtvUserTagLine = (TextView) findViewById(R.id.tvUserTagLine);
//Set User name..
System.out.println("CCMStaticVariable.loginUserName==="
+ CCMStaticVariable.loginUserName);
if (!CCMStaticVariable.loginUserName.equalsIgnoreCase("")) {
mtvUserName.setText("" + CCMStaticVariable.loginUserName);
}
/** Expandable List set here.. */
mExpandableListView = (ExpandableListView) this
.findViewById(android.R.id.list);
mExpandableListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
if (parent.isGroupExpanded(groupPosition)) {
commonGroupPosition = 0;
}else{
commonGroupPosition = groupPosition;
}
String GROUP_NAME = groupNames.get(groupPosition);
int end = groupNames.get(groupPosition).indexOf("(");
String GROUP_NAME_VALUE = GROUP_NAME.substring(0, end).trim();
if (menuItemList.contains(GROUP_NAME_VALUE)) {
menuType = false;
CCMStaticVariable.groupCatName = GROUP_NAME_VALUE;
} else {
menuType = true;
CCMStaticVariable.groupCatName = GROUP_NAME_VALUE;
}
long findCatId = dbHelper.getCategoryID(GROUP_NAME_VALUE);
if (findCatId != 0) {
categoryID = (int) findCatId;
}
childValContact="";
//showToast("Clicked on==" + GROUP_NAME_VALUE, 0);
return false;
}
});
/** Click on item */
mlist2.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos,long arg3) {
if (commonGroupPosition >= 4) {
if(childValContact == ""){
if (pos == 0) {
showAlertEdit(CCMStaticVariable.groupCatName);
}
/** Move contact to catgory */
if (pos == 1) {
startActivity(new Intent(UserMenuActivity.this,AddContactCategoryActivity.class));
}
}else{
if(pos == 0){
Intent intent = new Intent(UserMenuActivity.this,UserChatActivity.class);
intent.putExtra("userNameVal",childValContact);
startActivity(intent);
}
if(pos == 1){
XMPPConn.removeEntry(childValContact);
showToast("Contact deleted sucessfully", 0);
Intent intent = new Intent(UserMenuActivity.this,UserMenuActivity.class);
}
}
} else {
/** MyProfile */
if (pos == 0) {
startActivity(new Intent(UserMenuActivity.this,
MyProfileActivity.class));
}
/** New multiperson chat start */
if (pos == 1) {
startActivity(new Intent(UserMenuActivity.this,
NewMultipersonChatActivity.class));
}
/** New Broadcast message */
if (pos == 2) {
startActivity(new Intent(UserMenuActivity.this,
NewBroadcastMessageActivity.class));
}
/** Click on add category */
if (pos == 3) {
showAlertAdd();
}
if (pos == 4) {
startActivity(new Intent(UserMenuActivity.this,
CreateGroupActivity.class));
}
if (pos == 5) {
startActivity(new Intent(UserMenuActivity.this,
InvitetoCCMActivity.class));
}
if (pos == 6) {
startActivity(new Intent(UserMenuActivity.this,
SearchActivity.class));
}
if (pos == 7) {
onGroupExpand(2);
for (int i = 0; i < groupNames.size(); i++) {
mExpandableListView.expandGroup(i);
}
}
/** Click on settings */
if (pos == 8) {
startActivity(new Intent(UserMenuActivity.this,
SettingsActivity.class));
}
if (pos == 10) {
System.exit(0);
}
if (pos == 14) {
if (mllpopmenu.getVisibility() == View.VISIBLE) {
mllpopmenu.setVisibility(View.INVISIBLE);
if (popupWindow.isShowing()) {
popupWindow.dismiss();
}
} else {
mllpopmenu.setVisibility(View.VISIBLE);
mlist2.setAdapter(new ArrayAdapter(
UserMenuActivity.this,
R.layout.listviewtext, R.id.tvMenuText,
data));
}
}
}
}
});
}
/** Toast message display here.. */
private void showToast(String msg, int time) {
Toast.makeText(this, msg, time).show();
}
/** Show EditAlert Box */
private void showAlertEdit(String msg) {
alert = new AlertDialog.Builder(UserMenuActivity.this);
input = new EditText(UserMenuActivity.this);
input.setSingleLine();
input.setText(msg);
alert.setTitle("Edit Category Name");
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
etAlertVal = input.getText().toString();
/** isGroupFromServerOrMobile */
RosterGroup isGroupExists = CCMStaticVariable.CommonConnection
.getRoster().getGroup(CCMStaticVariable.groupCatName);
if (isGroupExists == null) {
dbHelper.updateCategory(categoryID, etAlertVal);
Intent intent = new Intent(UserMenuActivity.this,
UserMenuActivity.class);
startActivity(intent);
showToast("Category updated sucessfully", 0);
} else {
CCMStaticVariable.CommonConnection.getRoster()
.getGroup(CCMStaticVariable.groupCatName)
.setName(etAlertVal);
Intent intent = new Intent(UserMenuActivity.this,
UserMenuActivity.class);
startActivity(intent);
showToast("Category updated sucessfully", 0);
}
}
});
alert.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
}
});
alert.show();
}
/** ShowAlertBox Edit */
private void showAlertAdd() {
alert = new AlertDialog.Builder(UserMenuActivity.this);
input = new EditText(UserMenuActivity.this);
input.setSingleLine();
alert.setTitle("New Category Name");
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
etAlertVal = input.getText().toString();
if (!etAlertVal.equalsIgnoreCase("request")) {
long lastInsertedId = dbHelper.insertCategory(etAlertVal);
CCMStaticVariable.groupCatName = etAlertVal;
Intent intent = new Intent(UserMenuActivity.this,AddContactCategoryActivity.class);
startActivity(intent);
}
}
});
alert.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
}
});
alert.show();
}
public String showSubscriptionStatus(String friend){
return friend;
}
public String userName(String jid){
String username = "";
if(jid.contains("@")){
int index = jid.indexOf("@");
username = jid.substring(0, index);
}else{
username = jid;
}
return username;
}
/**Set expandable handler here..*/
Handler expendableHandle = new Handler(){
public void handleMessage(android.os.Message msg) {
mCustomProgressDialog.dismiss();
setExpandableListView();
};
};
BroadcastReceiver UpdateList = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Toast.makeText(UserMenuActivity.this, "CALLED", Toast.LENGTH_SHORT).show();
adapter.notifyDataSetChanged();
}
};
}
请建议我这里有什么问题。我看过很多帖子，并尝试了很多关于相同的事情。但它对我不起作用。请告诉我。
谢谢