Develop Reference

Can't integrate Firebase in my Android app

I added new project in my Firebase account like all the time and downloaded google-services.json setting file and successfully install it and the app works however not with firebase service the following is my debug , while the app crash.
please note that this error shows up when i try to add : implementation 'com.google.firebase:firebase-core:16.0.4' and in android studio it shows no error in gradle
10/08 19:55:40: Launching app
$ adb push C:\xxx\app\build\outputs\apk\debug\app-debug.apk /data/local/tmp/com.xxx.insidecartoon
$ adb shell pm install -t -r "/data/local/tmp/com.xxx.xxx"
pkg: /data/local/tmp/com.xxx.xxx
Success
APK installed in 27 s 241 ms
$ adb shell am start -n "com.xxx.xxx/com.xxx.xxx.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D
Waiting for application to come online: com.xxx.xxx.test | com.xxx.xxx
Connecting to com.xxx.xxx
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
I/System.out: Sending WAIT chunk
W/ActivityThread: Application com.xxx.xxx is waiting for the debugger on port 8100...
I/dalvikvm: Debugger is active
I/System.out: Debugger has connected
waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
Connected to the target VM, address: 'localhost:8602', transport: 'socket'
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: debugger has settled (1405)
I/dalvikvm: Could not find method android.content.Context.createDeviceProtectedStorageContext, referenced from method android.support.v4.content.ContextCompat.createDeviceProtectedStorageContext
W/dalvikvm: VFY: unable to resolve virtual method 565: Landroid/content/Context;.createDeviceProtectedStorageContext ()Landroid/content/Context;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getCodeCacheDir, referenced from method android.support.v4.content.ContextCompat.getCodeCacheDir
W/dalvikvm: VFY: unable to resolve virtual method 573: Landroid/content/Context;.getCodeCacheDir ()Ljava/io/File;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getColor, referenced from method android.support.v4.content.ContextCompat.getColor
W/dalvikvm: VFY: unable to resolve virtual method 574: Landroid/content/Context;.getColor (I)I
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getColorStateList, referenced from method android.support.v4.content.ContextCompat.getColorStateList
W/dalvikvm: VFY: unable to resolve virtual method 575: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getDataDir, referenced from method android.support.v4.content.ContextCompat.getDataDir
W/dalvikvm: VFY: unable to resolve virtual method 577: Landroid/content/Context;.getDataDir ()Ljava/io/File;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getDrawable, referenced from method android.support.v4.content.ContextCompat.getDrawable
W/dalvikvm: VFY: unable to resolve virtual method 580: Landroid/content/Context;.getDrawable (I)Landroid/graphics/drawable/Drawable;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.getNoBackupFilesDir, referenced from method android.support.v4.content.ContextCompat.getNoBackupFilesDir
W/dalvikvm: VFY: unable to resolve virtual method 587: Landroid/content/Context;.getNoBackupFilesDir ()Ljava/io/File;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.isDeviceProtectedStorage, referenced from method android.support.v4.content.ContextCompat.isDeviceProtectedStorage
W/dalvikvm: VFY: unable to resolve virtual method 600: Landroid/content/Context;.isDeviceProtectedStorage ()Z
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.startForegroundService, referenced from method android.support.v4.content.ContextCompat.startForegroundService
W/dalvikvm: VFY: unable to resolve virtual method 615: Landroid/content/Context;.startForegroundService (Landroid/content/Intent;)Landroid/content/ComponentName;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006
I/dalvikvm: Could not find method android.content.Context.isDeviceProtectedStorage, referenced from method com.google.android.gms.internal.measurement.zzsl.init
W/dalvikvm: VFY: unable to resolve virtual method 600: Landroid/content/Context;.isDeviceProtectedStorage ()Z
D/dalvikvm: VFY: replacing opcode 0x6e at 0x0009
V/FA: Registered activity lifecycle callback
D/FirebaseApp: com.google.firebase.auth.FirebaseAuth is not linked. Skipping initialization.
D/FirebaseApp: com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization.
I/FirebaseInitProvider: FirebaseApp initialization successful
V/FA: onActivityCreated
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
VFY: unable to find class referenced in signature (Lcom/google/android/gms/ads/internal/client/zze;)
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
I/dalvikvm: Could not find method com.google.android.gms.ads.internal.client.zze.zzb, referenced from method com.google.android.gms.ads.internal.client.zzac.zzH
W/dalvikvm: VFY: unable to resolve virtual method 17122: Lcom/google/android/gms/ads/internal/client/zze;.zzb (Landroid/content/Context;Lcom/google/android/gms/ads/internal/client/AdSizeParcel;Ljava/lang/String;Lcom/google/android/gms/internal/zzew;)Lcom/google/android/gms/ads/internal/client/zzu;
D/dalvikvm: VFY: replacing opcode 0x6e at 0x001f
I/dalvikvm: Could not find method com.google.android.gms.common.internal.zzx.zzb, referenced from method com.google.android.gms.ads.AdRequest$Builder.setContentUrl
W/dalvikvm: VFY: unable to resolve static method 21535: Lcom/google/android/gms/common/internal/zzx;.zzb (Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
D/dalvikvm: VFY: replacing opcode 0x71 at 0x0002
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
E/dalvikvm: Could not find class 'com.google.android.gms.ads.internal.client.zze', referenced from method com.google.android.gms.ads.internal.client.zzn.<init>
W/dalvikvm: VFY: unable to resolve new-instance 2192 (Lcom/google/android/gms/ads/internal/client/zze;) in Lcom/google/android/gms/ads/internal/client/zzn;
D/dalvikvm: VFY: replacing opcode 0x22 at 0x000a
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
VFY: unable to find class referenced in signature (Lcom/google/android/gms/ads/internal/client/zze;)
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zzaf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zzaf;' failed
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zzaf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zzaf;' failed
VFY: unable to find class referenced in signature (Lcom/google/android/gms/ads/internal/client/zzaf;)
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/internal/zzcv; (3038)
Link of class 'Lcom/google/android/gms/internal/zzcv;' failed
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/internal/zzcv; (3038)
Link of class 'Lcom/google/android/gms/internal/zzcv;' failed
W/dalvikvm: VFY: unable to find class referenced in signature (Lcom/google/android/gms/internal/zzcv;)
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/reward/client/zzf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/reward/client/zzf;' failed
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/reward/client/zzf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/reward/client/zzf;' failed
W/dalvikvm: VFY: unable to find class referenced in signature (Lcom/google/android/gms/ads/internal/reward/client/zzf;)
Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zze; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zze;' failed
D/dalvikvm: DexOpt: unable to opt direct call 0x42de at 0x0c in Lcom/google/android/gms/ads/internal/client/zzn;.<init>
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/client/zzaf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/client/zzaf;' failed
D/dalvikvm: DexOpt: unable to opt direct call 0x427b at 0x1a in Lcom/google/android/gms/ads/internal/client/zzn;.<init>
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/internal/zzcv; (3038)
Link of class 'Lcom/google/android/gms/internal/zzcv;' failed
D/dalvikvm: DexOpt: unable to opt direct call 0x623a at 0x21 in Lcom/google/android/gms/ads/internal/client/zzn;.<init>
W/dalvikvm: Unable to resolve superclass of Lcom/google/android/gms/ads/internal/reward/client/zzf; (3038)
Link of class 'Lcom/google/android/gms/ads/internal/reward/client/zzf;' failed
D/dalvikvm: DexOpt: unable to opt direct call 0x46fd at 0x28 in Lcom/google/android/gms/ads/internal/client/zzn;.<init>
W/dalvikvm: DexOpt: resolve class illegal access: Lcom/google/android/gms/ads/internal/util/client/zza; -> Lcom/google/android/gms/common/zze;
I/dalvikvm: Could not find method com.google.android.gms.common.zze.isGooglePlayServicesAvailable, referenced from method com.google.android.gms.ads.internal.util.client.zza.zzU
W/dalvikvm: VFY: unable to resolve static method 22073: Lcom/google/android/gms/common/zze;.isGooglePlayServicesAvailable (Landroid/content/Context;)I
D/dalvikvm: VFY: replacing opcode 0x71 at 0x0000
I/dalvikvm: Could not find method com.google.android.gms.internal.zzne.zzsi, referenced from method com.google.android.gms.ads.internal.util.client.zza.zzW
W/dalvikvm: VFY: unable to resolve static method 27575: Lcom/google/android/gms/internal/zzne;.zzsi ()Z
D/dalvikvm: VFY: replacing opcode 0x71 at 0x0014
W/dalvikvm: Exception Ljava/lang/NoClassDefFoundError; thrown while initializing Lcom/google/android/gms/ads/internal/client/zzn;
Exception Ljava/lang/NoClassDefFoundError; thrown while initializing Lcom/google/android/gms/ads/internal/client/zzaa;
Exception Ljava/lang/NoClassDefFoundError; thrown while initializing Lcom/google/android/gms/ads/AdRequest;
D/AndroidRuntime: Shutting down VM
W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x417e1da0)
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xxx.xxx, PID: 29691
java.lang.NoClassDefFoundError: com.google.android.gms.ads.internal.client.zze
at com.google.android.gms.ads.internal.client.zzn.<init>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzn.<clinit>(Unknown Source)
at com.google.android.gms.ads.internal.client.zzaa.<clinit>(Unknown Source)
at com.google.android.gms.ads.AdRequest.<clinit>(Unknown Source)
at com.google.android.gms.ads.AdRequest$Builder.<init>(Unknown Source)
at com.xxx.xxx.MainActivity.requestNewInterstitial(MainActivity.java:77)
at com.xxx.xxx.MainActivity.onCreate(MainActivity.java:49)
at android.app.Activity.performCreate(Activity.java:5541)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2368)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2464)
at android.app.ActivityThread.access$900(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5653)
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:1291)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
at dalvik.system.NativeStart.main(Native Method)
Disconnected from the target VM, address: 'localhost:8602', transport: 'socket'
my gradle info also i run android version 3.2 and gradle wrapper gradle-4.6
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion "28.0.2"
defaultConfig {
applicationId "com.xxx.xxx"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "KING-DEV"
}
buildTypes {
release {
debuggable false
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.2.1'
compile 'com.google.android.gms:play-services-ads:8.4.0'
implementation 'com.google.firebase:firebase-core:16.0.4'
}
apply plugin: 'com.google.gms.google-services'**
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.0'
classpath 'com.google.gms:google-services:4.1.0' // google-services plugin
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
google()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}

Try applying plugin of google play services
apply plugin: 'com.google.gms.google-services'

To solve this, please change the following line of code:
compile 'com.google.android.gms:play-services-ads:8.4.0'
to
implementation 'com.google.android.gms:play-services-ads:16.0.0'
And remove ** after this line of code:
apply plugin: 'com.google.gms.google-services'

GooglePlayServicesUtil.getErrorDialog doesn't work

This has been asked before here and here, but there are not useful answers, so I'll try to be specific: I'm trying to implement Google Cloud Messaging on an app developed using Android Studio 1.2.2. I have installed Google Play Services as explained here, and I implemented the checkPlayServices() method as suggested in this sample:
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
Log.i(TAG, "This device is not supported.");
finish();
}
return false;
}
return true;
}
If the device doesn't has Google Play Service or if it is outdated this method should alert the user and provide a button to install/update it easily. I test the app on a Samsung Galaxy S II with Android 4.1.2 with factory settings so it doesn't has an updated Google Play Services. I have confirmed that the GooglePlayServicesUtil.getErrorDialog() method is called, but the dialog doesn't appear. Instead I got the following in the logcat:
06-14 19:19:45.691 10616-10616/? I/dalvikvm﹕ Could not find method android.app.Notification$Builder.setLocalOnly, referenced from method com.google.android.gms.common.GooglePlayServicesUtil.zza
06-14 19:19:45.691 10616-10616/? W/dalvikvm﹕ VFY: unable to resolve virtual method 250: Landroid/app/Notification$Builder;.setLocalOnly (Z)Landroid/app/Notification$Builder;
06-14 19:19:45.691 10616-10616/? D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x00c2
06-14 19:19:45.691 10616-10616/? I/dalvikvm﹕ DexOpt: access denied from Lcom/google/android/gms/common/GooglePlayServicesUtil; to field Landroid/app/Notification;.extras
06-14 19:19:45.691 10616-10616/? W/dalvikvm﹕ VFY: unable to resolve instance field 18
06-14 19:19:45.691 10616-10616/? D/dalvikvm﹕ VFY: replacing opcode 0x54 at 0x00e1
06-14 19:19:45.691 10616-10616/? E/dalvikvm﹕ Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.zza
06-14 19:19:45.691 10616-10616/? W/dalvikvm﹕ VFY: unable to resolve check-cast 27 (Landroid/app/AppOpsManager;) in Lcom/google/android/gms/common/GooglePlayServicesUtil;
06-14 19:19:45.691 10616-10616/? D/dalvikvm﹕ VFY: replacing opcode 0x1f at 0x000e
06-14 19:19:45.696 10616-10616/? I/dalvikvm﹕ Could not find method android.content.pm.PackageManager.getPackageInstaller, referenced from method com.google.android.gms.common.GooglePlayServicesUtil.zzh
06-14 19:19:45.696 10616-10616/? W/dalvikvm﹕ VFY: unable to resolve virtual method 542: Landroid/content/pm/PackageManager;.getPackageInstaller ()Landroid/content/pm/PackageInstaller;
06-14 19:19:45.696 10616-10616/? D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x000b
06-14 19:19:45.696 10616-10616/? W/GooglePlayServicesUtil﹕ Google Play services out of date. Requires 7571000 but found 2012110
I'm completely stuck. Any help will be appreciated.

Your dialog is not being displayed because execution in the UI thread does not suspend when a dialog is created. This means your application will continue to run after the dialog is supposed to be displayed. If your code does something such as:
showDialog();
startDifferentActivity();
A user wouldn't be able to interact with the dialog because the different activity would start before the dialog even displayed. If you have code execution that is dependent on the user selecting the positive/negative/neutral buttons of a dialog or dismissing a dialog, implement the appropriate listeners.

Could not find class 'com.google.android.maps.GeoPoint', referenced from method

I have one user running my app getting the following error, which I can't reproduce on my phone or I haven't see on any other phone.
Can any one suggest why this isn't working just for this user, they say that the Googlemaps app works fine.
Note I have Google API and maps in my manifest too.
E/dalvikvm( 1978): Could not find class 'com.google.android.maps.GeoPoint', referenced from method id.wilsononline.gcadroid.gcadroid$loadNearby.<init>
W/dalvikvm( 1978): VFY: unable to resolve new-instance 522 (Lcom/google/android/maps/GeoPoint;) in Lid/wilsononline/gcadroid/gcadroid$loadNearby;
D/dalvikvm( 1978): VFY: replacing opcode 0x22 at 0x006b
D/dalvikvm( 1978): DexOpt: unable to opt direct call 0x0de1 at 0x7d in Lid/wilsononline/gcadroid/gcadroid$loadNearby;.<init>
W/dalvikvm( 1978): VFY: unable to find class referenced in signature (Lcom/google/android/maps/GeoPoint;)
W/dalvikvm( 1978): VFY: unable to find class referenced in signature (Lcom/google/android/maps/GeoPoint;)
W/dalvikvm( 1978): VFY: unable to find class referenced in signature (Lcom/google/android/maps/GeoPoint;)
I/dalvikvm( 1978): Could not find method com.google.android.maps.GeoPoint.getLatitudeE6, referenced from method id.wilsononline.gcadroid.gaLoadNearbyCaches.startLoadCaches
W/dalvikvm( 1978): VFY: unable to resolve virtual method 3554: Lcom/google/android/maps/GeoPoint;.getLatitudeE6 ()I
D/dalvikvm( 1978): VFY: replacing opcode 0x6e at 0x0004

Issues with Google Play Game Services occupying Android Res folder & Web API alternative?

So we're in the middle of development of our Unity based game for Android. We had Facebook authentication already implemented and this makes use of the Android/Res folder. It stores some values and images there.
While trying to implement Google Play SDK for Authentication, Leaderboards, Achievements.... we came to realize it too makes use of the Android/Res folder which apparently causes a crash and not currently possible.
We're curious about 2 options
1) is there any possible way to allow 2 different services to make use of the Android resource system? Please note we're using Unity, and the plugin is made by Prime31.
If the source for the library is released then it could be possible to modify so the resource folder isn't used.
2) If we're stuck not being able to have Facebook and Google Play Services co-exist then is the entire process possible via REST JSON access? How is the Google+ sign in performed with our app launching a browser or Google+ app to securely take in credentials?
See our error log below
W/PopupManager(11358): You have not specified a View to use as content view for popups. Falling back to the Activity content view which may not work properly in future versions of the API. Use setViewForPopups() to set your content view.W/dalvikvm(11358): VFY: unable to resolve static field 1994 (common_google_play_services_install_title) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0041
W/dalvikvm(11358): VFY: unable to resolve static field 1990 (common_google_play_services_enable_title) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x004c
W/dalvikvm(11358): VFY: unable to resolve static field 2000 (common_google_play_services_update_title) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0057
W/dalvikvm(11358): VFY: unable to resolve static field 1997 (common_google_play_services_unsupported_title) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0069
W/dalvikvm(11358): VFY: unable to resolve static field 1991 (common_google_play_services_install_button) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0009
W/dalvikvm(11358): VFY: unable to resolve static field 1988 (common_google_play_services_enable_button) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0010
W/dalvikvm(11358): VFY: unable to resolve static field 1998 (common_google_play_services_update_button) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0017
W/dalvikvm(11358): VFY: unable to resolve static field 1995 (common_google_play_services_unknown_issue) in Lcom/google/android/gms/R$string;
D/dalvikvm(11358): VFY: replacing opcode 0x60 at 0x0004
I/dalvikvm(11358): DexOpt: unable to optimize static field ref 0x07c9 at 0x18 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b
I/dalvikvm(11358): DexOpt: unable to optimize static field ref 0x07c8 at 0x38 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b
I/dalvikvm(11358): DexOpt: unable to optimize static field ref 0x07c5 at 0x3f in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b
I/dalvikvm(11358): DexOpt: unable to optimize static field ref 0x07cf at 0x46 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b
I/dalvikvm(11358): DexOpt: unable to optimize static field ref 0x07cc at 0x66 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b
D/Prime31 (11358): onConnectionFailed: result 4
D/Prime31 (11358): onConnectionFailed: since user didn't initiate sign-in, failing now.
D/dalvikvm(11358): GC_CONCURRENT freed 430K, 5% free 9477K/9936K, paused 2ms+2ms, total 27ms
I/Unity (11358): authenticationFailedEvent: Unknown error
I/Unity (11358):
I/Unity (11358): (Filename: ./Runtime/ExportGenerated/AndroidManaged/UnityEngineDebug.cpp Line: 54)
I/Unity (11358):
E/Prime31 (11358): Exception running command on UI thread: Not connected. Call connect() and wait for onConnected() to be called.
D/dalvikvm(11358): GC_CONCURRENT freed 385K, 5% free 9477K/9936K, paused 2ms+2ms, total 27ms
D/dalvikvm( 6765): GC_CONCURRENT freed 417K, 7% free 9483K/10172K, paused 7ms+2ms, total 32ms
E/Prime31 (11358): Exception running command on UI thread: Not connected. Call connect() and wait for onConnected() to be called.
D/dalvikvm(11358): GC_CONCURRENT freed 385K, 5% free 9478K/9936K, paused 2ms+2ms, total 29ms
D/dalvikvm(11358): GC_CONCURRENT freed 387K, 5% free 9478K/9936K, paused 6ms+1ms, total 62ms
D/Prime31 (11358): isGooglePlayServicesAvailable returned 0
D/Prime31 (11358): beginUserInitiatedSignIn: continuing pending sign-in flow.
D/Prime31 (11358): resolveConnectionResult: trying to resolve result: ConnectionResult{statusCode=SIGN_IN_REQUIRED, resolution=PendingIntent{423c8fe8: android.os.BinderProxy#423c8f88}}
D/Prime31 (11358): --------------------- result has resolution. Starting it. --------------------
I/ActivityManager( 506): START u0 {cmp=com.phyken.wizardopstactics/com.prime31.PlayServicesProxyActivity} from pid 11358
D/dalvikvm(11358): GC_CONCURRENT freed 384K, 5% free 9481K/9936K, paused 5ms+4ms, total 80ms

1) There isn't any problem in two services using the resources folder. All the resources will be on the final APK, just pay attention on the resources names so they don't conflict. The best practice is to use a suffix (example: fb_logo.png and google_logo.png, instead of two logo.png images)
2) Not needed!
If you posted the error log it would have been easier to help and point the exact issue!

Why can disabling obfuscation in ProGuard break the optimization step?

We've recently decided to disable code obfuscation in our Android build, since while it makes the final APK slightly larger, it makes debugging so much more difficult.
Ever since we've done that, I keep running into crashes in our app that were not present before, i.e. while obfuscation was still active. Usually these crashes are caused by Java VerifyErrors or NoSuchMethodErrors.
Here are two of these errors I suddenly see when I disable obfuscation:
Could not find method org.apache.http.HttpConnectionMetrics.getResponseCount, referenced from method com.google.android.apps.analytics.PipelinedRequester.sendRequests
W/dalvikvm( 6652): VFY: unable to resolve virtual method 16112: Lorg/apache/http/HttpConnectionMetrics;.getResponseCount ()J
W/dalvikvm( 6652): VFY: rejecting opcode 0x6e at 0x000c
W/dalvikvm( 6652): VFY: rejected Lcom/google/android/apps/analytics/PipelinedRequester;.sendRequests ()V
W/dalvikvm( 6652): Verifier rejected class Lcom/google/android/apps/analytics/PipelinedRequester;
D/dalvikvm( 6652): GC_CONCURRENT freed 253K, 46% free 3261K/6023K, external 0K/0K, paused 2ms+2ms
I/dalvikvm( 6652): Rejecting re-init on previously-failed class Lcom/google/android/apps/analytics/PipelinedRequester; v=0x4062de30
D/AndroidRuntime( 6652): Shutting down VM
W/dalvikvm( 6652): threadid=1: thread exiting with uncaught exception (group=0x400a7560)
E/AndroidRuntime( 6652): FATAL EXCEPTION: main
E/AndroidRuntime( 6652): java.lang.VerifyError: com/google/android/apps/analytics/PipelinedRequester
...
I could resolve this error by disabling class merging via !class/merging/*
Another error I was seeing was this:
I/dalvikvm( 7292): DexOpt: access denied from Lcom/urbanairship/analytics/EventUploadManager; to field Lorg/apache/http/entity/AbstractHttpEntity;.contentEncoding
W/dalvikvm( 7292): VFY: unable to resolve instance field 5188
D/dalvikvm( 7292): VFY: replacing opcode 0x5b at 0x00ec
I/dalvikvm( 7292): Could not find method org.apache.http.conn.scheme.PlainSocketFactory.<init>, referenced from method com.google.android.apps.analytics.PipelinedRequester.<init>
W/dalvikvm( 7292): VFY: unable to resolve direct method 15044: Lorg/apache/http/conn/scheme/PlainSocketFactory;.<init> (B)V
D/dalvikvm( 7292): VFY: replacing opcode 0x70 at 0x0003
D/dalvikvm( 7292): VFY: dead code 0x0006-0009 in Lcom/google/android/apps/analytics/PipelinedRequester;.<init> (Lorg/apache/http/HttpHost;)V
I/dalvikvm( 7292): DexOpt: access denied from Lcom/google/android/apps/analytics/PipelinedRequester; to field Lorg/apache/http/impl/SocketHttpClientConnection;.open
W/dalvikvm( 7292): VFY: unable to resolve instance field 5234
D/dalvikvm( 7292): VFY: replacing opcode 0x55 at 0x0006
D/dalvikvm( 7292): VFY: dead code 0x0008-000e in Lcom/google/android/apps/analytics/PipelinedRequester;.closeConnection ()V
D/dalvikvm( 7292): VFY: dead code 0x0010-0011 in Lcom/google/android/apps/analytics/PipelinedRequester;.closeConnection ()V
I/dalvikvm( 7292): DexOpt: access denied from Lcom/google/android/apps/analytics/PipelinedRequester; to field Lorg/apache/http/impl/SocketHttpClientConnection;.open
W/dalvikvm( 7292): VFY: unable to resolve instance field 5234
D/dalvikvm( 7292): VFY: replacing opcode 0x55 at 0x0006
D/dalvikvm( 7292): VFY: dead code 0x0008-0009 in Lcom/google/android/apps/analytics/PipelinedRequester;.addRequest (Lorg/apache/http/HttpEntityEnclosingRequest;)V
D/dalvikvm( 7292): GC_CONCURRENT freed 253K, 47% free 3251K/6023K, external 0K/0K, paused 2ms+3ms
I/dalvikvm( 7292): DexOpt: access denied from Lcom/google/android/apps/analytics/PipelinedRequester; to field Lorg/apache/http/impl/AbstractHttpClientConnection;.metrics
W/dalvikvm( 7292): VFY: unable to resolve instance field 5225
D/dalvikvm( 7292): VFY: replacing opcode 0x54 at 0x0008
D/dalvikvm( 7292): VFY: dead code 0x000a-0090 in Lcom/google/android/apps/analytics/PipelinedRequester;.sendRequests ()V
D/AndroidRuntime( 7292): Shutting down VM
W/dalvikvm( 7292): threadid=1: thread exiting with uncaught exception (group=0x400a7560)
E/AndroidRuntime( 7292): FATAL EXCEPTION: main
E/AndroidRuntime( 7292): java.lang.NoSuchMethodError: org.apache.http.conn.scheme.PlainSocketFactory.<init>
This one I could resolve by setting !method/propagation/*
But why do these problems only appear with obfuscation disabled? Shouldn't one have no impact on the other?

The obfuscation was saving you because it was renaming your copies of the Apache HttpClient classes to names that wouldn't collide with the copies of those classes already present in Android.
Nasty place to be... you might want to consider not using Apache HttpClient at all, and using the in-built HttpURLConnection class as suggested by Jesse Wilson:
http://android-developers.blogspot.com/2011/09/androids-http-clients.html
You could try this Android-friendly veneer on HttpURLConnection:
https://github.com/kevinsawicki/http-request
If you really have to use Apache HttpClient, either use the old version embedded in Android, or try tweaking your ProGuard configuration to just obfuscate the HttpClient libraries.