move NetworkUtils to WPUtils subtree

WordPressUtils/src/main/java/org/wordpress/android/util/NetworkUtils.java

@@ -0,0 +1,81 @@
+package org.wordpress.android.util;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.os.Build;
+import android.provider.Settings;
+
+/**
+ * requires android.permission.ACCESS_NETWORK_STATE
+ */
+public class NetworkUtils {
+    public static final int TYPE_UNKNOWN = -1;
+
+    /**
+     * returns information on the active network connection
+     */
+    private static NetworkInfo getActiveNetworkInfo(Context context) {
+        if (context == null) {
+            return null;
+        }
+        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        if (cm == null) {
+            return null;
+        }
+        // note that this may return null if no network is currently active
+        return cm.getActiveNetworkInfo();
+    }
+
+    /**
+     * returns the ConnectivityManager.TYPE_xxx if there's an active connection, otherwise
+     * returns TYPE_UNKNOWN
+     */
+    private static int getActiveNetworkType(Context context) {
+        NetworkInfo info = getActiveNetworkInfo(context);
+        if (info == null || !info.isConnected()) {
+            return TYPE_UNKNOWN;
+        }
+        return info.getType();
+    }
+
+    /**
+     * returns true if a network connection is available
+     */
+    public static boolean isNetworkAvailable(Context context) {
+        NetworkInfo info = getActiveNetworkInfo(context);
+        return (info != null && info.isConnected());
+    }
+
+    /**
+     * returns true if the user is connected to WiFi
+     */
+    public static boolean isWiFiConnected(Context context) {
+        return (getActiveNetworkType(context) == ConnectivityManager.TYPE_WIFI);
+    }
+
+    /**
+     * returns true if airplane mode has been enabled
+     */
+    public static boolean isAirplaneModeOn(Context context) {
+        // prior to JellyBean 4.2 this was Settings.System.AIRPLANE_MODE_ON, JellyBean 4.2
+        // moved it to Settings.Global
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return Settings.System.getInt(context.getContentResolver(), Settings.System.AIRPLANE_MODE_ON, 0) != 0;
+        } else {
+            return Settings.Global.getInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
+        }
+    }
+
+    /**
+     * returns true if there's an active network connection, otherwise displays a toast error
+     * and returns false
+     */
+    public static boolean checkConnection(Context context) {
+        if (isNetworkAvailable(context)) {
+            return true;
+        }
+        ToastUtils.showToast(context, R.string.no_network_message);
+        return false;
+    }
+}

WordPressUtils/src/main/res/values/strings.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="ptr_tip_message">Tip: Pull down to refresh</string>
+    <string name="no_network_message">There is no network available</string>
 </resources>