Global Variable class not working

Question

I am trying to setup and global variable, but I my app fails after adding the following line to my AndroidManifest.xml

<application android:name=".MyApp"
              android:icon="@drawable/icon" 
              android:label="@string/app_name">

I am using the following code as well:

Class: package com.mynamecompany.datahelp;

import android.app.Application;

class MyApp extends Application {

      private String myState;

      public String getState(){
        return myState;
      }
      public void setState(String s){
        myState = s;
      }
    }

Usage:

MyApp appState = ((MyApp)getApplicationContext());
String state = appState.getState();
Toast.makeText(getApplicationContext(), "My Value-" + state, Toast.LENGTH_SHORT).show();
appState.setState("Test");
Toast.makeText(getApplicationContext(), "My Value-" + appState.getState(), Toast.LENGTH_SHORT).show();

The program starts and errors immediately on the Splash screen before the usage code can be called further in the program, on a different Activity.

Any ideas?

Answer 1

You are trying to cast to your class from Context. You have to call getApplication.

Answer 2

What's the package indication in your manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mynamecompany">
    <application android:name=".datahelp.MyApp"
        android:icon="@drawable/icon" android:label="@string/app_name">
...

Probably you have to change it as I made it above. The rest should just work fine, tried it out on my own project.