Develop Reference

AndroidStudio still thinks the id of a drawable is seized by a missing resource

I am testing an Android app with item-list->item-detail activity-fragment structure.
I get this kind of error:
java.lang.NullPointerException
at android.text.style.DynamicDrawableSpan.getSize(DynamicDrawableSpan.java:81)
at android.text.MeasuredText.addStyleRun(MeasuredText.java:207)
at android.text.StaticLayout.generate(StaticLayout.java:281)
at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
at android.text.DynamicLayout.<init>(DynamicLayout.java:170)
at android.widget.TextView.makeSingleLayout(TextView.java:6134)
at android.widget.TextView.makeNewLayout(TextView.java:6032)
at android.widget.TextView.onMeasure(TextView.java:6389)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at androidx.core.widget.NestedScrollView.measureChildWithMargins(NestedScrollView.java:1502)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at androidx.core.widget.NestedScrollView.onMeasure(NestedScrollView.java:556)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at com.google.android.material.appbar.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:95)
at com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1556)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:803)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1352)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(Activi
It is originated in unknown place but it is related to a drawable.
span = new ImageSpan(activity, R.drawable.suitable_id);
The drawable was created from a svg file by means of new vector asset automatic import.
Before correctly importing it that way, I wrongly created a resource with a svg element inside a selector element. The id of the element was on the selector (suitable_id).
After the importing with vector asset I did not realize that the id was still recognized by the compiler, although it had not been assigned to the new resource.
So it gave the above null pointer error.
Now the id is on the vector element, it is the legitimate element (it has a path inside that reproduces the svg outline indeed), unless the id goes on the path element.
I cleaned the project and made it, but the resource still is not updated, I think it is trying to load the old missing resource. No files are present on the project, that I can see, corresponding to the old wrong resource.
What do I have to do now?

Invalidate caches and restart instead of rebuild

FragmentManager IllegalStateException: No host

UPDATE:
Crashes gone when i put nullcheks (fragment != null, getActivity() != null) whereever i could.
My app is using ViewPager (offscreen limit 5) with FragmentStatePagerAdapter initialized with getSupportFragmentManager(). Each page has it's own fragments and backstack.
App crashes on startup. Problem occurs only on preLollipop devices and emulator. Using latest support lbrary (tried 24.0.0 also - same result)
Stacktrace:
java.lang.IllegalStateException: No host at
android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1273)
at
android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1268)
at
android.support.v4.app.FragmentManagerImpl.dispatchCreate(FragmentManager.java:2138)
at android.support.v4.app.Fragment.onCreate(Fragment.java:1254)
at android.support.v4.app.Fragment.performCreate(Fragment.java:2062)
at
android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1051)
at
android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286)
at
android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758)
at
android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1632)
at
android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:637)
at
android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1237)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1085)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1611)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at
android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at
android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at
android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at
android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at
com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1912)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1109)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1291)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
at
android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
at
android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)

If you have nested Fragment (extends FragmentActivity), then use getChildFragmentManager() instead of getFragmentManager().
may be it will help you ..

In my case, I am using viewpager inside fragment and was using getChildFragmentManager() while setting viewpager adapter. It is also recommended to use this I guess.
There is also an issue, java.lang.IllegalStateException: No host exception was not showing everytime but it was showing too often when I called a method of viewpager containing Activity or coming back from another Activity class before setting viewpager.setCurrentItem(POSITION);
I tried in many ways and finally I changed getChildFragmentManager() to getActivity().getSupportFragmentManager();
After changing this java.lang.IllegalStateException: No host exception is not showing any more.
I think its related to Activity state issue which contains viewpager.

When you are using viewPager , make sure you are following these practices
call super(fragmentManager) in your constructor
if you are using Viewpager inside a Fragment, pass getChildFragmentManager in to Adapter

android RecyclerView onMeasure nullpointer

I wanna use recyclerview, but null pointer has appeared.
So I searched this issue, They said i have to make LinearLayoutManager set like below, I did it.:
setLayoutManager(new LinearLayoutManager(context))
But, It doesn't work.
My error log is :
java.lang.NullPointerException
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:1694)
at android.view.View.measure(View.java:16628)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:847)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16628)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:883)
at android.view.View.measure(View.java:16628)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16628)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16628)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16628)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16628)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2298)
at android.view.View.measure(View.java:16628)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5610)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:212)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
at dalvik.system.NativeStart.main(Native Method)
My code :
GridLayoutManager gridLayoutManager = new GridLayoutManager(IndexActivity.this , 2 );
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(gridLayoutManager);
recyclerView.setAdapter(mAdapter);
xml :
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:horizontalSpacing="#dimen/index_gridview_horizontal_spacing"
android:verticalSpacing="#dimen/index_gridview_vertical_spacing"
android:numColumns="2"
android:id="#+id/recyclerView" />
This problem was solved by changing gradle.
My reference is here : beecanvas.com/yjcSh8Tp

Try like this:
RecyclerView recyclerView = (RecyclerView) findViewById(
R.id.recycler_view);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
recyclerView.setAdapter(new NumberedAdapter(30));
Here I have used span count of 2, you will have 30 elements, you can modify as per your need. Hope this helps you.

have you used an old revision of recyclerview? you can check my another answer for details, hope it help.

I suppose you are using wrong GridLayoutManager. Please make sure you have import android.support.v7.widget.GridLayoutManager, and then:
//for Activity
recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
or //for Fragment
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 2));
should be ok.
[UPDATE]
You only can set one LayoutManager for RecyclerView, LinearLayoutManager or GridLayoutManager or StaggeredGridLayoutManager, not both of them. For your case, just set GridLayoutManager.
Hope this help!

ButterKnife does not injects views for MyFragment

Something is wrong with ButterKnife injection. Upon starting my app, I'm getting below error:
01-23 11:35:36.229 23663-23663/lt.andro.myapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: lt.andro.myapp, PID: 23663
java.lang.RuntimeException: Unable to inject views for MyNewFragment{528796ec #0 id=0x7f0a017c android:switcher:2131362172:1}
at butterknife.ButterKnife.inject(ButterKnife.java:263)
at butterknife.ButterKnife.inject(ButterKnife.java:207)
at lt.andro.myapp.BaseFragment.onViewCreated(BaseFragment.java:66)
at lt.andro.myapp.MyNewFragment.onViewCreated(MyNewFragment.java:117)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:961)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1912)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1109)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1291)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.
Looks like all ButterKnife's #InjectView types are correct, but still ButterKnife is unable to inject views for my new fragment.
My layout looks like this
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/swipe_refresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
and my new fragment has this #InjectViews:
#InjectView(R.id.swipe_refresh) SwipeRefreshLayout swipeRefreshLayout;
#InjectView(R.id.recycler) RecyclerView list;

In a fragment you should use it in onCreateView(...)
View v = inflater.inflate(R.layout.meh, container, false);
ButterKnife.inject(this, v);

Apparently I had to check other ButterKnife's annotations like #OnItemClick. I've used it for a RecyclerView, which was causing that RuntimeException for me.

It also pays to watch any bindings you are injecting from within the injected view that throws the error.
In my instance I had a fragment foo that injected a view bar
// Foo.java
View v = inflater.inflate(R.layout.bar, container, false);
ButterKnife.inject(this, v);
This was throwing the described error. It turns out that in foo I was binding to an element in baz that I expected to find inside my injected view bar.
// Foo.java
#InjectView(R.id.baz)
TextView filterTextView;
Except I had a typo in 'baz' in the layout xml for bar
// bar.xml
<EditText
android:id="#+id/bazz"
/>
And this caused Unable to inject views for...

$CustomDataAdapter.getView(MainActivity.java:168)

Android App keeps crashing and I am getting the following crash report
java.lang.NullPointerException
at lk.digitalarc.elan.MainActivity$CustomDataAdapter.getView(MainActivity.java:168)
at android.widget.AbsListView.obtainView(AbsListView.java:2263)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1263)
at android.widget.ListView.onMeasure(ListView.java:1175)
at android.view.View.measure(View.java:16497)
at android.widget.RelativeLayout.measureChild(RelativeLayout.java:689)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:473)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
The error began happening after I wrote a conditional code to update image src on an imageview
ImageView img = (ImageView) v.findViewById(R.id.imgDP);
// update display pic for message according to content
if (!burst.getBurstFile().isEmpty()) {
img.setImageResource(R.drawable.dp_attachment);
} else if (!burst.getBurstImg().isEmpty()) {
img.setImageResource(R.drawable.dp_pic);
}
I know this seems like something very basic but for the life of me I cant figure out what the problem is.
The version this app is build for sdk version 14 to 19. I have a suspension about the .Empty() function but am not sure.

As per the Adapter.getView() javadocs, you should always check that your ConvertView v is not null. I am guessing the reference to v in the line ImageView img = (ImageView) v.findViewById(R.id.imgDP); is what is causing the null pointer exception.