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POButton visibility/invisibility issue.
primarykey
Id
10994480
data
AcceptedAnswerId
10994499
AnswerCount
2
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2012-06-12T10:09:49.127
FavoriteCount
0
LastActivityDate
2012-06-12T14:03:39.733
LastEditDate
2012-06-12T14:03:39.733
LastEditorUserId
646806
OwnerUserId
1263679
ParentId
0
PostTypeId
1
Score
0
ViewCount
566
LastEditorDisplayName
text
Body
<p>I am working android application that required login, Now I want After successfully login into my application, login button should be invisible and logout button should be visible, but getting errors.</p> <p>I am using this function:</p> <pre><code>login.setVisibility(View.GONE); & logout.setVisibility(View.VISIBLE); </code></pre> <p>Eclipse give me error in logcat like: </p> <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rahul.cheerfoolz/com.rahul.cheerfoolz.CheerfoolznativeActivity}: java.lang.NullPointerException. </code></pre> <p>Main.class</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); session = new SessionID(); Button login = (Button) findViewById(R.id.home_btn_feature_login); Button logout = (Button) findViewById(R.id.home_btn_feature_logout); int userID = SessionID.getUserID(); System.out.println("value of the userID into the main page:====>"+userID); // when user login then here I got the userID value if ((userID) > 0) { login.setVisibility(View.GONE); //when Execute this give me error logout.setVisibility(View.VISIBLE); //when Execute this give me error } else { login.setVisibility(View.VISIBLE); //when Execute this give me error logout.setVisibility(View.GONE); //when Execute this give me error } setContentView(R.layout.main); setHeader_home(""); } </code></pre> <p>Main.xml</p> <pre><code> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="2" android:orientation="horizontal" >  <Button android:id="@+id/home_btn_feature_login" style="@style/HomeButton" android:drawableTop="@drawable/login_button" android:onClick="onClickFeature" android:text="@string/title_feature_login" />  <Button android:id="@+id/home_btn_feature_logout" style="@style/HomeButton" android:drawableTop="@drawable/logout_button" android:onClick="onClickFeature" android:text="@string/title_feature_logout" /> <Button android:id="@+id/home_btn_feature2" style="@style/HomeButton" android:drawableTop="@drawable/register_button" android:onClick="onClickFeature" android:text="@string/title_feature_register" /> </LinearLayout> </code></pre>
Tags
<android><button><visibility>
Title
Button visibility/invisibility issue.
singulars
PostAcceptedAnswerId
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USRobinHood
UserOwnerUserId
1. USRahul Patel
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
2. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. VO
  singulars
  PostPostId
  POButton visibility/invisibility issue.
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTApproveEditSuggestion
CommentsPostId

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