How to set a static IP for new WiFi configuration?

Question

Again stuck on the same problem.

I have found around that we can set static system settings like this:

System.putString(getContentResolver(), android.provider.Settings.System.WIFI_USE_STATIC_IP, "1"); // to define it use static ip's
System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_IP,"192.168.1.15");
System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_NETMASK,"255.255.255.0");
System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_DNS1,"192.168.1.1");
System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_GATEWAY,"192.168.1.1");

But No Success!

I don't understand that when to set these settings?

Should I do it before the wifi configuration creation or after saving the wifi configuration or even before activating it or after it?

However, I have tried the all possible cases from my side and when I check Android WiFi settings, I see it's still on DHCP.

A previous question i.e. How to configue a static IP address, netmask, gateway programmatically on Android 3.x or 4.x has completely ruined my android device and now it can't switch ON its WiFi anymore.

I also tried static IP on my HTC phone and no success, its always in DHCP mode!

Do I need to call a "reconnect" command? If yes, then in which way?

Answer 1

I think you it should look like:

android.provider.Settings.System.putString(getContentResolver(),android.provider.Settings.System.WIFI_STATIC_IP,"192.168.1.15");
android.provider.Settings.System.putString(getContentResolver(),android.provider.Settings.System.WIFI_STATIC_DNS1, "192.168.1.1");        
android.provider.Settings.System.putString(getContentResolver(),android.provider.Settings.System.WIFI_STATIC_GATEWAY, "192.168.1.1");   
android.provider.Settings.System.putString(getContentResolver(),android.provider.Settings.System.WIFI_STATIC_NETMASK, "255.255.255.0");                 
android.provider.Settings.System.putString(getContentResolver(),android.provider.Settings.System.WIFI_USE_STATIC_IP, "1");

And don't forget the manifest:

<uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>

Regarding the WiFi problem that your device had, you can try switching the WIFI on programmatically. This post might be helpful: How to programmatically turn off WiFi on Android device?