Some android devices encounter java.lang.NoClassDefFoundError
<p>This is my first question here, hopefully it won't be ignored.</p>

<p>Application was published 3 months ago. Generally app was tested on multiple android devices and works fine, but some customers experience crashes.</p>

<p>Stack Trace:</p>

<pre><code>java.lang.NoClassDefFoundError: com.lostnfound.mobile_app.Past_mapactivityinstance
at com.lostnfound.mobile_app.Past_map_fragm.onCreateView(Past_map_fragm.java:52)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:845)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1058)
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1156)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:270)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
at android.app.Activity.setContentView(Activity.java:1862)
at com.lostnfound.mobile_app.Past_act.onCreate(Past_act.java:44)
at android.app.Activity.performCreate(Activity.java:4492)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
</code></pre>

<p>Past_map_fragm code: </p>

<pre><code>@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    ...
    final TabSpec tabSpec = tabHost.newTabSpec("map").setIndicator("Map")
            .setContent(new Intent(getActivity(), Past_mapactivityinstance.class));
    ...
}
</code></pre>

<p>I understand that NoClassDefFoundError is really general error. I can't figure out why the application works fine on most of android devices, but some encounter this error.</p>

<p>Manifest:</p>

<pre><code>&lt;uses-sdk android:minSdkVersion="7"
          android:targetSdkVersion="8" /&gt;
</code></pre>
