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PONullPointerException on map initialisation
 

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  1. PONullPointerException on map initialisation
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    <p>I am getting nullpointer exception on map initialisation using SupportMapFragment.I have added google play lib also. It throws exception at line <code>map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();</code> on onStart() method.</p> <p>My code is:</p> <pre><code>public class MapSectionFragment extends Fragment { GoogleMap map; @Override public void onStart() { // TODO Auto-generated method stub super.onStart(); map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); } public Fragment newInstance() { return new MapSectionFragment(); } View rootView = null; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { try{ if (null == savedInstanceState) rootView = inflater.inflate(R.layout.lay_search_map, container, false); map = ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap(); } } </code></pre> <p>lay_search_map.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/transparent" tools:context=".LocatorMainActivity$DummySectionFragment" &gt; &lt;fragment android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="fill_parent" android:layout_height="match_parent" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>this is my error log:</p> <pre><code>11-30 14:37:13.100: E/AndroidRuntime(6159): FATAL EXCEPTION: main 11-30 14:37:13.100: E/AndroidRuntime(6159): java.lang.NullPointerException 11-30 14:37:13.100: E/AndroidRuntime(6159): at com.agile.pbc.LocatorMainActivity$MapSectionFragment.onStart(LocatorMainActivity.java:533) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.Fragment.performStart(Fragment.java:1524) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:957) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.view.ViewPager.populate(ViewPager.java:914) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.View.measure(View.java:12922) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.View.measure(View.java:12922) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.View.measure(View.java:12922) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.widget.LinearLayout.measureVertical(LinearLayout.java:822) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.widget.LinearLayout.onMeasure(LinearLayout.java:563) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.View.measure(View.java:12922) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 11-30 14:37:13.100: E/AndroidRuntime(6159): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2261) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.View.measure(View.java:12922) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1255) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2649) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.os.Handler.dispatchMessage(Handler.java:99) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.os.Looper.loop(Looper.java:137) 11-30 14:37:13.100: E/AndroidRuntime(6159): at android.app.ActivityThread.main(ActivityThread.java:4507) 11-30 14:37:13.100: E/AndroidRuntime(6159): at java.lang.reflect.Method.invokeNative(Native Method) 11-30 14:37:13.100: E/AndroidRuntime(6159): at java.lang.reflect.Method.invoke(Method.java:511) 11-30 14:37:13.100: E/AndroidRuntime(6159): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978) 11-30 14:37:13.100: E/AndroidRuntime(6159): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745) 11-30 14:37:13.100: E/AndroidRuntime(6159): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. This table or related slice is empty.
    1. USgIrL
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    1. This table or related slice is empty.
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    1. PO
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      1. PTAnswer
    2. PO
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    1. This table or related slice is empty.
    1. COdebug through the return values of each method an check which one is null
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      1. PONullPointerException on map initialisation
      1. USPhilipp Sander
    2. COmap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); on onStart() method is giving nullpointer exception.
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      1. PONullPointerException on map initialisation
      1. USgIrL
    3. COno. you don't understand what i mean: each method returns something and you perform an new method on this return value which causes the nullpointer. please check, which method returns null
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      1. PONullPointerException on map initialisation
      1. USPhilipp Sander
 

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