fixed network lint abort

Author: longbai

library/src/main/java/com/qiniu/android/utils/AndroidNetwork.java

@@ -78,9 +78,9 @@ public static String getHostIP() {
     public static String networkType(Context context) {
         ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo networkInfo = connectivity.getActiveNetworkInfo();
-        if (connectivity == null || !networkInfo.isConnected())
+        if (connectivity == null || !networkInfo.isConnected()) {
             return Constants.NETWORK_CLASS_UNKNOWN;
-
+        }
         int netWorkType = connectivity.getActiveNetworkInfo().getType();
         if (netWorkType == ConnectivityManager.TYPE_WIFI) {
             return Constants.NETWORK_WIFI;
@@ -91,7 +91,14 @@ public static String networkType(Context context) {
     }
 
     private static String getNetWorkClass(Context context) {
+        if (context.checkPermission(Manifest.permission.READ_PHONE_STATE, Process.myPid(), Process.myUid()) != PackageManager.PERMISSION_GRANTED) {
+            return Constants.NETWORK_CLASS_UNKNOWN;
+        }
+
         TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+        if (telephonyManager == null){
+            return Constants.NETWORK_CLASS_UNKNOWN;
+        }
 
         switch (telephonyManager.getNetworkType()) {
             case TelephonyManager.NETWORK_TYPE_GPRS:
@@ -118,7 +125,6 @@ private static String getNetWorkClass(Context context) {
             default:
                 return Constants.NETWORK_CLASS_UNKNOWN;
         }
-
     }
 
     /**