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POerror on button click in android
primarykey
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15631810
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ClosedDate
CommentCount
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CreationDate
2013-03-26T07:41:54.063
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2013-03-26T07:49:39.697
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2013-03-26T07:45:23.090
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Score
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ViewCount
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text
Body
<pre><code>public boolean isValidPin(String pin) { type = false; Cursor c =db .rawQuery( "select * from"+ pinTable+" where Pin='" + pin+ "'", null); if (c.getCount() > 0) { c.moveToFirst(); type = true; } c.close(); return type; } </code></pre> <p>i have a button on a dialog box in android wen iclick it stops forcefully... this is the logcat error..</p> <pre><code>03-26 07:35:23.140: E/AndroidRuntime(16907): FATAL EXCEPTION: main 03-26 07:35:23.140: E/AndroidRuntime(16907): java.lang.NullPointerException 03-26 07:35:23.140: E/AndroidRuntime(16907): at com.android.lnt_form.WayDataBase.isValidPin(WayDataBase.java:147) 03-26 07:35:23.140: E/AndroidRuntime(16907): at com.android.lnt_form.LoginActivity$3.onClick(LoginActivity.java:133) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.view.View.performClick(View.java:4202) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.view.View$PerformClick.run(View.java:17340) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.os.Handler.handleCallback(Handler.java:725) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.os.Handler.dispatchMessage(Handler.java:92) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.os.Looper.loop(Looper.java:137) 03-26 07:35:23.140: E/AndroidRuntime(16907): at android.app.ActivityThread.main(ActivityThread.java:5039) 03-26 07:35:23.140: E/AndroidRuntime(16907): at java.lang.reflect.Method.invokeNative(Native Method) 03-26 07:35:23.140: E/AndroidRuntime(16907): at java.lang.reflect.Method.invoke(Method.java:511) 03-26 07:35:23.140: E/AndroidRuntime(16907): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 03-26 07:35:23.140: E/AndroidRuntime(16907): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 03-26 07:35:23.140: E/AndroidRuntime(16907): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>pls help . how do i rectify it??</p>
Tags
<android><buttonclick>
Title
error on button click in android
singulars
PostAcceptedAnswerId
1. PO
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PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USPragnani
UserOwnerUserId
1. USshivani
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
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VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.