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PONullpointer @ managedQuery
 

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    <p>When I run my code, I get an exception @ managedQuery. Whats wrong? I don't see it.</p> <pre><code>import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.database.Cursor; import android.os.Bundle; import android.provider.MediaStore; public class FileManager extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } public List&lt;String&gt; getAudioFiles() { List&lt;String&gt; songs = new ArrayList&lt;String&gt;(); //Some audio may be explicitly marked as not being music String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0"; String[] projection = { MediaStore.Audio.Media._ID, MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.DURATION }; Cursor cursor = managedQuery( MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, projection, null, null, MediaStore.Audio.Media._ID); while(cursor.moveToNext()){ songs.add(cursor.getString(0) + "||" + cursor.getString(1) + "||" + cursor.getString(2) + "||" + cursor.getString(3) + "||" + cursor.getString(4) + "||" + cursor.getString(5)); } return songs; } </code></pre> <p>}</p> <p>This is the exception</p> <pre><code> 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): FATAL EXCEPTION: main 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test/com.test.testActivity}: java.lang.NullPointerException 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.os.Handler.dispatchMessage(Handler.java:99) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.os.Looper.loop(Looper.java:130) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread.main(ActivityThread.java:3691) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at java.lang.reflect.Method.invokeNative(Native Method) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at java.lang.reflect.Method.invoke(Method.java:507) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at dalvik.system.NativeStart.main(Native Method) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): Caused by: java.lang.NullPointerException 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.content.ContextWrapper.getContentResolver(ContextWrapper.java:90) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.Activity.managedQuery(Activity.java:1556) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at com.test.FileManager.getAudioFiles(FileManager.java:35) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at com.test.testActivity.onCreate(testActivity.java:21) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 09-27 17:04:20.130: ERROR/AndroidRuntime(4079): ... 11 more </code></pre>
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    1. USJohan
    1. USJohan
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    1. COPlease post your exception as well. Also, according to the Android SDK API managedQuery is deprecated (you should be using CursorLoader instead).
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      1. USThor84no
    2. COIf you use the same e-mail on your new account as you did in your old account, I can merge your accounts and give you back ownership of this question. Please flag your question once you've done so, select 'other' and ask for a merge.
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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.

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