Databases
StackOverflow2013
Postsdbo
POAndroid: Null Pointer exception when using property
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid: Null Pointer exception when using property
    primarykey
    data
    text
    <p>I'm using a public class to save 2 pieces of information to an array (so I can easily get the name and the ID). However for some reason it doesn't seem to like it!</p> <p><strong>I'm getting the following error on the line :-</strong></p> <p><code>AssetDetails.ID = f.getString(f.getColumnIndex("AssetObsID"));</code></p> <pre><code>Null pointer access: The variable details can only be null at this location </code></pre> <p>My code that is having the error is:</p> <pre><code>public static List&lt;clsNameID&gt; assetHelperTypes(){ Log.e("Asset Helper Types:", "Started"); clsNameID AssetDetails = null; List&lt;clsNameID&gt; mHelperNames = new ArrayList&lt;clsNameID&gt;(); File dbfile = new File(Global.currentDBfull); SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbfile, null); Cursor f = db.rawQuery("select * from assetobservationtypes", null); Log.e("Asset Helper Types:", "Cursor run"); if(f.getCount() != 0) { f.moveToFirst(); while(!f.isAfterLast()) { Log.e("Asset Helper Types:", "Finding Items"); AssetDetails.ID = f.getString(f.getColumnIndex("AssetObsID")); AssetDetails.Name = f.getString(f.getColumnIndex("Observation")); mHelperNames.add(AssetDetails); Log.e("Asset Helper Types:", "Added Items"); } } f.close(); return mHelperNames; } </code></pre> <p>Class clsNameID :-</p> <pre><code>package com.directenquiries.assessment.tool; public class clsNameID { public String Name; public String ID; } </code></pre> <p>I'm trying to call it with:</p> <pre><code> public void addCondition(View view){ List&lt;clsNameID&gt; mHelperNames = DBFunctions.assetHelperTypes(); final List&lt;Integer&gt; mSelectedItems = new ArrayList&lt;Integer&gt;(); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("My Title") .setMultiChoiceItems(mHelperNames.toArray(new CharSequence[mHelperNames.size()]), null, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { if (isChecked) { mSelectedItems.add(which); } else if (mSelectedItems.contains(which)) { mSelectedItems.remove(Integer .valueOf(which)); } } }) .setPositiveButton("Save", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { //Create onlcick method } }) .setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { //Create onlcick method } }); builder.show(); } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USScorpion
    1. USTMB87
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAndroid: Null Pointer exception when using property
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COPost full stack trace please'
      singulars
      1. POAndroid: Null Pointer exception when using property
      1. USRohit Jain
    2. COyou never initialized `AssetDetails`, its null . and you are trying to access `ID` on it.
      singulars
      1. POAndroid: Null Pointer exception when using property
      1. USPermGenError
 

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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload