title: My android app crash when installed in android 4.4.2
body: <p>I am trying to test my android application in my device.
  First i have tested on <code>android 6</code> and it works fine, when i try to installed in my android <code>4.4.2</code> device it crashed.
  This is the sdk information in my gradle file</p>
  
  <pre><code> compileSdkVersion 25
    buildToolsVersion "25.0.2"
    minSdkVersion 14
    targetSdkVersion 25
  </code></pre>
  
  <p>Any one here have any idea can help me please.
  Logcat:
  <code>02-22 12:46:17.170 2136-2136/? D/dalvikvm: Not late-enabling CheckJNI (already on)
  02-22 12:46:17.190 2136-2136/? D/AndroidRuntime: Shutting down VM
  02-22 12:46:17.190 2136-2136/? W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x9cd8eb20)
  02-22 12:46:17.190 2136-2142/? E/jdwp: Failed sending reply to debugger: Broken pipe
  02-22 12:46:17.190 2136-2142/? D/dalvikvm: Debugger has detached; object registry had 1 entries
  02-22 12:46:17.190 2136-2136/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.example.kaouther.needtaxi, PID: 2136
                                                   java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.kaouther.needtaxi-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.kaouther.needtaxi-1, /vendor/lib, /system/lib]]
                                                       at android.app.ActivityThread.installProvider(ActivityThread.java:4793)
                                                       at android.app.ActivityThread.installContentProviders(ActivityThread.java:4385)
                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4325)
                                                       at android.app.ActivityThread.access$1500(ActivityThread.java:135)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                       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)
                                                    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.kaouther.needtaxi-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.kaouther.needtaxi-1, /vendor/lib, /system/lib]]
                                                       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
                                                       at android.app.ActivityThread.installProvider(ActivityThread.java:4778)
                                                       at android.app.ActivityThread.installContentProviders(ActivityThread.java:4385) 
                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4325) 
                                                       at android.app.ActivityThread.access$1500(ActivityThread.java:135) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                       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) 
  02-22 12:47:36.370 2136-2136/? I/Process: Sending signal. PID: 2136 SIG: 9</code></p>