Blank GoogleMap on a real Android 2.3 device with Google API (Lv. 17)
android, google-maps, google-maps-android-api-2
Solution
OK, after hours of hours of thinking and trying, I think I can mark this problem as fixed.
The problem is caused by the Wrong Date & Time in the 2.3 device.
The time and date on 2.3 device is reset to 2013/01/01 due to out of power for a long time(as you can see in the log output, it shows 01/04 as date). And that can also explain why running with the same code, the Google Maps V2 didn't show up on 2.3 device but will show up on 4.0+ device (because the 4.0+ device I'm using has the correct time).
I think because of the huge difference of date and time between this device and the Google Maps server, the communication between them got malfunctioned (don't know exactly why, but it should be some timestamp stuff).
When I manually set the date and time of the 2.3 device to the current time, the problem got solved immediately.
This problem is so weird and the logout just showing like:
Could not find class 'maps.i.k', referenced from method maps.z.ag.a
is so ambiguous that makes me very hard to think about the problem is caused by wrong date & time on the device.
So next time if you encountered something wrong while playing around with Google Maps API, please follow this steps to check:
- Check if your devices' date & time settings correspond to your current time zone (Unfortunately the log output will not return much constructive information to lead you to think about the date & time)
- Check if you've enabled the correct service in your API console (Enable `Google Maps API Android V2` not `Google Maps API V2`, log will return `Authentication Failed` if you do something wrong with this step)
- Check if you've used the correct keystore to get the API secret (The log will give you a hint saying `Authentication Failed`
- Check if you've included the correct library files
Thanks for anyone who tried to help me, and I hope this question & solution can help others.
Problem
Question Description, Please read this first I am trying to get my simple app which will display user's location running on devices from Android 2.3 to Android 4.0+ devices. The map does not show up on a real Android 2.3 device. The app currently can run and show maps as I desired on Android 4.0+ device without any problem. Because it can display maps without any problem on Android 4.0+, so I presume the problem should not be anything wrong with the settings or permissions of Google Maps V2. However when I try it on Android 2.3 devices, the map area will be a blank like the screen shot shown below: The app uses ActionBarSherlock, Google Maps API v2 and SupportMapFragment. Build targeted to SDK 17, min SDK 10. Code Snippet I pasted and trimmed the code to show the only related part, please leave a comment if you need anything else. activity_layout.xml ``` <fragment android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="@dimen/incident_padding_right" /> ``` Activity.java ``` import com.actionbarsherlock.app.SherlockFragmentActivity; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.GoogleMap.OnMarkerDragListener; import com.google.android.gms.maps.SupportMapFragment; public class Activity extends SherlockFragmentActivity{ private static GoogleMap map; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.activity_layout); ............ //Set up map view map = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); ............ OnMarkerDragListener markerDragListener = new OnMarkerDragListener() { @Override public void onMarkerDragStart(Marker marker) { // Called when the marker drag is started } @Override public void onMarkerDragEnd(Marker marker) { // Called when the marker is dropped down. coords[0] = marker.getPosition().latitude; coords[1] = marker.getPosition().longitude; RestoreUIwithSavedLocation(coords); Log.d(TAG, "Pin Dropped at: " + coords[0] + ", " + coords[1]); } @Override public void onMarkerDrag(Marker marker) { } }; map.setOnMarkerDragListener(markerDragListener); } ``` The Logcat when running on a real Android 2.3 device: ``` 01-04 21:16:52.020: D/dalvikvm(19074): VFY: dead code 0x0014-0018 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b (Landroid/content/res/Resources;)Z 01-04 21:16:52.150: W/dalvikvm(19074): Unable to resolve superclass of Lmaps/p/s; (427) 01-04 21:16:52.150: W/dalvikvm(19074): Link of class 'Lmaps/p/s;' failed 01-04 21:16:52.150: W/dalvikvm(19074): Unable to resolve superclass of Lmaps/y/bo; (3820) 01-04 21:16:52.150: W/dalvikvm(19074): Link of class 'Lmaps/y/bo;' failed 01-04 21:16:52.150: W/dalvikvm(19074): Unable to resolve superclass of Lmaps/i/k; (4208) 01-04 21:16:52.150: W/dalvikvm(19074): Link of class 'Lmaps/i/k;' failed 01-04 21:16:52.150: E/dalvikvm(19074): Could not find class 'maps.i.k', referenced from method maps.z.ag.a 01-04 21:16:52.150: W/dalvikvm(19074): VFY: unable to resolve new-instance 3540 (Lmaps/i/k;) in Lmaps/z/ag; 01-04 21:16:52.150: D/dalvikvm(19074): VFY: replacing opcode 0x22 at 0x006d 01-04 21:16:52.160: D/dalvikvm(19074): VFY: dead code 0x006f-007f in Lmaps/z/ag;.a (Landroid/view/LayoutInflater;Lcom/google/android/gms/maps/GoogleMapOptions;ZLjava/lang/String;)Lmaps/z/ag; ``` The logcat when running on emulator with Google API Lv.10 ``` 03-25 13:00:47.974: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:47.992: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:47.992: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:48.002: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:48.002: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:48.022: W/GooglePlayServicesUtil(751): Google Play services is missing. 03-25 13:00:48.072: D/AndroidRuntime(751): Shutting down VM 03-25 13:00:48.072: W/dalvikvm(751): threadid=1: thread exiting with uncaught exception (group=0x40015560) 03-25 13:00:48.133: E/AndroidRuntime(751): FATAL EXCEPTION: main 03-25 13:00:48.133: E/AndroidRuntime(751): java.lang.RuntimeException: Unable to start activity ComponentInfo{Activity}: java.lang.NullPointerException 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.os.Handler.dispatchMessage(Handler.java:99) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.os.Looper.loop(Looper.java:130) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread.main(ActivityThread.java:3683) 03-25 13:00:48.133: E/AndroidRuntime(751): at java.lang.reflect.Method.invokeNative(Native Method) 03-25 13:00:48.133: E/AndroidRuntime(751): at java.lang.reflect.Method.invoke(Method.java:507) 03-25 13:00:48.133: E/AndroidRuntime(751): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 03-25 13:00:48.133: E/AndroidRuntime(751): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 03-25 13:00:48.133: E/AndroidRuntime(751): at dalvik.system.NativeStart.main(Native Method) 03-25 13:00:48.133: E/AndroidRuntime(751): Caused by: java.lang.NullPointerException 03-25 13:00:48.133: E/AndroidRuntime(751): at Activity.onCreate(Activity.java:250) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 03-25 13:00:48.133: E/AndroidRuntime(751): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 03-25 13:00:48.133: E/AndroidRuntime(751): ... 11 more ``` `Activity.onCreate(Activity.java:250)` is pointed to this line: map.setOnMarkerDragListener(markerDragListener); What I Have Tried And its strange that if I add this line ``` <uses-library android:name="com.google.android.maps" /> ``` to `AndroidManifest.xml`, the logcat will show nothing (no error no warning), and the map is still blank. But someone has a post saying that this line solved her/his blank map issue: https://stackoverflow.com/questions/15595357/android-supportmapfragment-google-play-services-issue In my project's `Android Dependencies` folder, I've got these `*.jar` files: ``` actionbar-sherlock-4.2-library.jar google-play-services_lib.jar android-support-v4.jar actionbarsherlock-plugin-maps-4.2.0.jar google-play-services.jar ``` From an answer of this post, I am aware that the Google Maps may not running well on emulator. All I need is to make the map displayed on a real Android 2.3 device which I failed. In addition, I've also paid close attention to these post and tried their method (if applicable to my circumstances) but still no joy on my issue: Google Map V2 android map referencing How to use Google Maps API v2 with API level 10? Google MapFragment is blank (white) with Could not find class 'maps.j.k' Using ActionBarSherlock With the New SupportMapFragment If you need more information, please leave a comment below and I'll try to add them.