Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.util.UUID;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.telephony.TelephonyManager;

public class Main {
    private static String uniqueID = null;
    private static final String PREF_UNIQUE_ID = "PREF_UNIQUE_ID";

    /**
     * Get device Id<br>
     * <b>Will work only on mobile and NOT tablets</b>
     * 
     * @param context
     * @return
     */
    public static String getDeviceId(Context context) {
        final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        String deviceid = tm.getDeviceId();
        if (deviceid == null) {
            deviceid = getUniqueId(context);
        }
        return deviceid;
    }

    public synchronized static String getUniqueId(Context context) {
        if (uniqueID == null) {
            SharedPreferences sharedPrefs = context.getSharedPreferences(PREF_UNIQUE_ID, Context.MODE_PRIVATE);
            uniqueID = sharedPrefs.getString(PREF_UNIQUE_ID, null);
            if (uniqueID == null) {
                uniqueID = UUID.randomUUID().toString();
                Editor editor = sharedPrefs.edit();
                editor.putString(PREF_UNIQUE_ID, uniqueID);
                editor.commit();
            }
        }
        return uniqueID;
    }
}