ja added

Author: valf1st

doc/japanese/referrer_ja.md

@@ -0,0 +1,43 @@
+## Support multiple broadcast receivers
+
+If multiple SDKs need to register a broadcast receiver for the
+`INSTALL_REFERRER` intent in your app, you will have to implement your own
+`BroadcastReceiver` that calls all the other receivers that you want to
+support. It should look like this [1]:
+
+```java
+public class InstallReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // Adjust
+        new AdjustReferrerReceiver().onReceive(context, intent);
+
+        // Google Analytics
+        new CampaignTrackingReceiver().onReceive(context, intent);
+    }
+}
+```
+
+Make sure to adjust the list of supported receviers and fix the imports. You
+also need to update your `AndroidManifest.xml` to use your own
+`InstallReceiver`:
+
+```xml
+<receiver
+    android:name="com.your.app.InstallReceiver"
+    android:exported="true" >
+    <intent-filter>
+        <action android:name="com.android.vending.INSTALL_REFERRER" />
+    </intent-filter>
+</receiver>
+```
+
+Make sure to adjust your package name.
+
+---
+
+References and related links:
+
+- [1] http://stackoverflow.com/questions/14158841/android-google-analytics-v2-broadcast-receiver-for-all-sdks
+- [2] http://stackoverflow.com/questions/4093150/get-referrer-after-installing-app-from-android-market
+- [3] http://docs.mdotm.com/index.php/Universal_Application_Tracking