Get update folder method (#1323)

* Exposed current update path.

* Check for null

* API reference update

Author: Anna Kocheshkova

android/app/src/main/java/com/microsoft/codepush/react/CodePush.java

@@ -17,7 +17,6 @@
 import org.json.JSONObject;
 
 import java.io.File;
-import java.io.NotActiveException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -159,6 +158,14 @@ long getBinaryResourcesModifiedTime() {
         }
     }
 
+    public String getPackageFolder() {
+        JSONObject codePushLocalPackage = mUpdateManager.getCurrentPackage();
+        if (codePushLocalPackage == null) {
+            return null;
+        }
+        return mUpdateManager.getPackageFolderPath(codePushLocalPackage.optString("packageHash"));
+    }
+
     @Deprecated
     public static String getBundleUrl() {
         return getJSBundleFile();

docs/api-android.md

@@ -57,4 +57,6 @@ As an alternative to constructors *you can also use `CodePushBuilder`* to setup
 
 - __getBundleUrl(String bundleName)__ - Returns the path to the most recent version of your app's JS bundle file, using the specified resource name (e.g. `index.android.bundle`). This method has the same resolution behavior as the Objective-C equivalent described above.
 
+- __getPackageFolder()__ - Returns the path to the current update folder.
+
 - __overrideAppVersion(String appVersionOverride)__ - Sets the version of the application's binary interface, which would otherwise default to the Play Store version specified as the `versionName` in the `build.gradle`. This should be called a single time, before the CodePush instance is constructed.