Android global variable

You can extend the base android.app.Application class and add member variables like so:

public class MyApplication extends Application {    private String someVariable;    public String getSomeVariable() {        return someVariable;    }    public void setSomeVariable(String someVariable) {        this.someVariable = someVariable;    }}

In your android manifest you must declare the class implementing android.app.Application (add the android:name=".MyApplication" attribute to the existing application tag):

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

Then in your activities you can get and set the variable like so:

// set((MyApplication) this.getApplication()).setSomeVariable("foo");// getString s = ((MyApplication) this.getApplication()).getSomeVariable();

You can use a Singleton Pattern like this:

package com.ramps;public class MyProperties {private static MyProperties mInstance= null;public int someValueIWantToKeep;protected MyProperties(){}public static synchronized MyProperties getInstance() {        if(null == mInstance){            mInstance = new MyProperties();        }        return mInstance;    }}

In your application you can access your singleton in this way:

MyProperties.getInstance().someValueIWantToKeep

This global variable works for my project:

public class Global {    public static int ivar1, ivar2;    public static String svar1, svar2;    public static int[] myarray1 = new int[10];}//  How to use other or many activityGlobal.ivar1 = 10;int i = Global.ivar1;