E2-1372 : Add Exception handler code (#202)

Author: e7mac

AndroidSDKCore/src/main/java/com/leanplum/Leanplum.java

@@ -581,6 +581,8 @@ protected Void doInBackground(Void... params) {
           return null;
         }
       });
+
+      Util.initExceptionHandling(context);
     } catch (Throwable t) {
       Util.handleException(t);
     }

AndroidSDKCore/src/main/java/com/leanplum/internal/Util.java

@@ -47,6 +47,7 @@
 import com.leanplum.LeanplumException;
 import com.leanplum.internal.Constants.Methods;
 import com.leanplum.internal.Constants.Params;
+import com.leanplum.monitoring.ExceptionHandler;
 import com.leanplum.utils.SharedPreferencesUtil;
 
 import org.json.JSONException;
@@ -837,10 +838,19 @@ private static void setUpdateTime(Map<String, Object> params, PackageManager pac
     }
   }
 
+  /**
+   * Initialize exception handling in the SDK.
+   */
+  public static void initExceptionHandling(Context context) {
+    ExceptionHandler.getInstance().setContext(context);
+  }
+
   /**
    * Handles uncaught exceptions in the SDK.
    */
   public static void handleException(Throwable t) {
+    ExceptionHandler.getInstance().reportException(t);
+
     if (t instanceof OutOfMemoryError) {
       if (Constants.isDevelopmentModeEnabled) {
         throw (OutOfMemoryError) t;

AndroidSDKCore/src/main/java/com/leanplum/monitoring/ExceptionHandler.java

@@ -0,0 +1,45 @@
+package com.leanplum.monitoring;
+
+import android.content.Context;
+
+import com.leanplum.internal.Log;
+
+public class ExceptionHandler {
+  private static final String LEANPLUM_CRASH_REPORTER_CLASS =
+          "com.leanplum.monitoring.internal.LeanplumExceptionReporter";
+  private static final ExceptionHandler instance = new ExceptionHandler();
+  public ExceptionReporting exceptionReporter = null;
+
+  private ExceptionHandler() {}
+
+  public static ExceptionHandler getInstance() {
+    return instance;
+  }
+
+  public void setContext(Context context) {
+    try {
+      // Class.forName runs the static initializer in LeanplumExceptionReporter
+      // which sets the exceptionReporter on the singleton
+      Class.forName(LEANPLUM_CRASH_REPORTER_CLASS);
+      if (exceptionReporter != null) {
+        try {
+          exceptionReporter.setContext(context);
+        } catch (Throwable t) {
+          Log.e("LeanplumCrashHandler", t);
+        }
+      }
+    } catch (Throwable t) {
+      Log.e("LeanplumCrashHandler", t);
+    }
+  }
+
+  public void reportException(Throwable exception) {
+    if (exceptionReporter != null) {
+      try {
+        exceptionReporter.reportException(exception);
+      } catch (Throwable t) {
+        Log.e("LeanplumCrashHandler", t);
+      }
+    }
+  }
+}

AndroidSDKCore/src/main/java/com/leanplum/monitoring/ExceptionReporting.java

@@ -0,0 +1,8 @@
+package com.leanplum.monitoring;
+
+import android.content.Context;
+
+public interface ExceptionReporting {
+    void setContext(Context context);
+    void reportException(Throwable t);
+}