Android: SharedPreferences shared by different activities

Following code cannot be shared by different Activities:

context.getSharedPreferences("PreferenceManager", context.MODE_PRIVATE).getString(key, defaultValue);

If you save on one Activity and wants to load on the other activity, the other Activity cannot find it.

Solution:

PreferenceManager.getDefaultSharedPreferences(context).getString(key, defaultValue);

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Android: How to get device unique ID example

Available starting from 2.3+ (level 9)

  public void example() {

         String sUID = Build.SERIAL;

  }

Android: Get device model name example

  public void example() {

         String sModel = Build.MODEL;
  }

Android: Get device CPU Processor example

  public void example() {

         String sCPU = Build.CPU_ABI;

  }

Android: Get device manufacturer name example

  public void example() {

         String sManufacturer = Build.MANUFACTURER;
  }

Android: Get Android OS version example

  public void example() {

         String sOSVersion = Build.VERSION.RELEASE;

  }

Android: Wifi - Get hidden SSID example

       WifiManager wifiManager = (WifiManager)

                    getSystemService(Context.WIFI_SERVICE);
       WifiInfo wifiInfo = wifiManager.getConnectionInfo();
       String hiddenSSID = wifiInfo.getHiddenSSID();

Android: wifi - Get Network Link Speed exmaple

       WifiManager wifiManager = (WifiManager)

                    getSystemService(Context.WIFI_SERVICE);
       WifiInfo wifiInfo = wifiManager.getConnectionInfo();
       String networkSpeed = wifiInfo.getLinkSpeed();