Merge pull request #240 from sxci/header_iso_8859_1

 okhttp 头信息中字符只允许 iso-8859-1

Author: longbai

library/build.gradle

@@ -38,7 +38,6 @@ android {
 dependencies {
     compile 'com.squareup.okhttp3:okhttp:3.2.0'
     compile 'com.qiniu:happy-dns:0.2.7'
-//    compile 'com.android.support:appcompat-v7:21.0.3'
     compile fileTree(include: ['*.jar'], dir: 'libs')
 }
 

library/src/main/java/com/qiniu/android/http/UserAgent.java

@@ -6,6 +6,7 @@
 import com.qiniu.android.common.Constants;
 import com.qiniu.android.utils.StringUtils;
 
+import java.nio.charset.Charset;
 import java.util.Locale;
 import java.util.Random;
 
@@ -72,7 +73,7 @@ private static String deviceName(String manufacturer, String model) {
     public String getUa(String part) {
         String _part = ("" + part).trim();
         _part = _part.substring(0, Math.min(16, _part.length()));
-        return ua + "; " + _part + ")";
+        return new String((ua + "; " + _part + ")").getBytes(Charset.forName("ISO-8859-1")));
     }
 
 }