07-06 14:41:21.870: E/AndroidRuntime(24097): FATAL EXCEPTION: main
07-06 14:41:21.870: E/AndroidRuntime(24097): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.locademo/com.example.locademo.MainActivity}: java.lang.NumberFormatException: Invalid double: ""
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2146)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread.access$700(ActivityThread.java:140)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.os.Handler.dispatchMessage(Handler.java:99)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.os.Looper.loop(Looper.java:177)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread.main(ActivityThread.java:4947)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at java.lang.reflect.Method.invokeNative(Native Method)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at java.lang.reflect.Method.invoke(Method.java:511)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at dalvik.system.NativeStart.main(Native Method)
07-06 14:41:21.870: E/AndroidRuntime(24097): Caused by: java.lang.NumberFormatException: Invalid double: ""
07-06 14:41:21.870: E/AndroidRuntime(24097):    at java.lang.StringToReal.invalidReal(StringToReal.java:63)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at java.lang.StringToReal.parseDouble(StringToReal.java:248)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at java.lang.Double.parseDouble(Double.java:295)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at com.example.locademo.MainActivity.getExpandableListData(MainActivity.java:203)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at com.example.locademo.MainActivity.onCreate(MainActivity.java:107)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.Activity.performCreate(Activity.java:5207)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
07-06 14:41:21.870: E/AndroidRuntime(24097):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2085)
07-06 14:41:21.870: E/AndroidRuntime(24097):    ... 11 more