dheeraj22 / simple-calculator

This repository contains source files for building a simple calculator Android Application using Android Studio

Simple-Calculator App Android Version 2.3

This is a simple code demonstrating the working of a calculator!

simple-calculator's Issues

Updating UI

Hey, the UI of the app is very bad. I can update it.

i'm posting my logcat for the problem pls help thanks

06-30 16:45:31.584 22070-22070/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.calculator.calculator, PID: 22070
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.calculator.calculator/com.example.calculator.calculator.calculator}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2113)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5095)
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:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.support.v7.app.AppCompatDelegateImplBase.(AppCompatDelegateImplBase.java:117)
at android.support.v7.app.AppCompatDelegateImplV9.(AppCompatDelegateImplV9.java:149)
at android.support.v7.app.AppCompatDelegateImplV14.(AppCompatDelegateImplV14.java:56)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:202)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:183)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:190)
at com.example.calculator.calculator.calculator.(calculator.java:10)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2104)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2236) 
at android.app.ActivityThread.access$800(ActivityThread.java:138) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5095) 
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:786) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 
at dalvik.system.NativeStart.main(Native Method) 

It forced me out from the app whenever i try to add another number.

Hello sir. This app can be installed an run on my phone but the problem is now whenever I tried to insert second number, example like i:
First round : 5+4 = 9 (this one i get it)
and when i try to add another number,
Second round: i clicked on the add button and it forced me out from the application.

That's the problem I discover so far. Can you please help me in this?
Thank you.

the app isn't working it say's calculator unfortunately stop.....pls help..