Fix layoutlib by avoiding Java7 calls

This change also fixes a NPE in TypedArray caused by changes in the
framework.

Change-Id: Ie64237c567fa16c35c807db22ce9a4b609ee411d

core/java/android/content/res/Resources.java

@@ -1625,7 +1625,7 @@ public class Resources {
 
             String locale = null;
             if (mConfiguration.locale != null) {
-                locale = mConfiguration.locale.toLanguageTag();
+                locale = localeToLanguageTag(mConfiguration.locale);
             }
             int width, height;
             if (mMetrics.widthPixels >= mMetrics.heightPixels) {
@@ -1706,6 +1706,12 @@ public class Resources {
         }
     }
 
+    // Locale.toLanguageTag() is not available in Java6. LayoutLib overrides
+    // this method to enable users to use Java6.
+    private String localeToLanguageTag(Locale locale) {
+        return locale.toLanguageTag();
+    }
+
     /**
      * Update the system resources configuration if they have previously
      * been initialized.

tools/layoutlib/bridge/src/android/content/res/BridgeTypedArray.java

@@ -58,7 +58,7 @@ public final class BridgeTypedArray extends TypedArray {
 
     public BridgeTypedArray(BridgeResources resources, BridgeContext context, int len,
             boolean platformFile) {
-        super(null, null, null, 0);
+        super(resources, null, null, 0);
         mBridgeResources = resources;
         mContext = context;
         mPlatformFile = platformFile;

tools/layoutlib/bridge/src/android/content/res/Resources_Delegate.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.content.res;
+
+import java.util.Locale;
+
+import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
+import com.ibm.icu.util.ULocale;
+
+/**
+ * Delegate used to provide new implementation of a select few methods of {@link Resources}
+ *
+ * Through the layoutlib_create tool, the original  methods of Resources have been replaced
+ * by calls to methods of the same name in this delegate class.
+ *
+ */
+public class Resources_Delegate {
+
+    @LayoutlibDelegate
+    /*package*/ static String localeToLanguageTag(Resources res, Locale locale)  {
+        return ULocale.forLocale(locale).toLanguageTag();
+    }
+}

tools/layoutlib/create/src/com/android/tools/layoutlib/create/CreateInfo.java

@@ -125,6 +125,7 @@ public final class CreateInfo implements ICreateInfo {
         "android.app.Fragment#instantiate", //(Landroid/content/Context;Ljava/lang/String;Landroid/os/Bundle;)Landroid/app/Fragment;",
         "android.content.res.Resources$Theme#obtainStyledAttributes",
         "android.content.res.Resources$Theme#resolveAttribute",
+        "android.content.res.Resources#localeToLanguageTag",
         "android.content.res.TypedArray#getValueAt",
         "android.graphics.BitmapFactory#finishDecode",
         "android.os.Handler#sendMessageAtTime",