Search code examples
androidweb-servicesandroid-contextandroid-internet

android crash on internet connection turn off

I am new to android, as my study project I made an application. Which is syncing data from webservice and fetching in my application.

Everything working fine.

But in this scenario

  1. Launch the application
  2. Check for internet connection
  3. Get content from server
  4. Fetch data in application

5. When we turn off Mobile Data / WiFi , then press any button in application suddenly application crashes.

There is any way to handle this issue ?

Thanks in advance

Error message

08-14 21:28:57.670: E/AndroidRuntime(7466): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.tvc/com.myapp.tvc.SingleActivity}: java.lang.NullPointerException
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2122)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread.access$600(ActivityThread.java:140)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1228)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.os.Looper.loop(Looper.java:137)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread.main(ActivityThread.java:4895)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at java.lang.reflect.Method.invokeNative(Native Method)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at java.lang.reflect.Method.invoke(Method.java:511)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at dalvik.system.NativeStart.main(Native Method)
08-14 21:28:57.670: E/AndroidRuntime(7466): Caused by: java.lang.NullPointerException
08-14 21:28:57.670: E/AndroidRuntime(7466):     at com.myapp.tvc.SingleActivity.onCreate(SingleActivity.java:76)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.Activity.performCreate(Activity.java:5163)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-14 21:28:57.670: E/AndroidRuntime(7466):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2061)
08-14 21:28:57.670: E/AndroidRuntime(7466):     ... 11 more
Solution

  • whatever is at line 76 of SingleActivity is null, since you did not provide code the best we can say is find out what and why is null at that line