android save global variable

Question

i want to save a variable to be global variable on all screens i have, for example, for every connect to the localhost i am using 10.0.2.2 so i have to write that ip on every connect,and when i want to try my application on my mobile device i have to go to code and replace all the 10.0.2.2 with my system static ip 192.168.1.101 ,is there any way to say that ip on a global variable? i read that i have to used string on android but i don't know how, any help please

You can use Android shared preferences: http://developer.android.com/reference/android/content/SharedPreferences.html, another solution can be: http://stackoverflow.com/questions/708012/android-how-to-declare-global-variables — Nermeen, Jul 04 '12 at 12:46
Look at this question http://stackoverflow.com/questions/11326443/passing-variables-from-one-class-to-another-wiithout-using-the-intent-get-extra/11326561#11326561 — user370305, Jul 04 '12 at 12:47

score 1 · Accepted Answer · answered Jul 04 '12 at 12:47

Use SharedPreferences to store and retrieve it: http://developer.android.com/reference/android/content/SharedPreferences.html

Example: http://developer.android.com/guide/topics/data/data-storage.html#pref

public static final String PREFS_NAME = "MyPrefsFile";

//retrieve
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
String ip= settings.getString("ip");
//use ip

//store
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("ip", mIp);
editor.commit();

android save global variable

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