diff --git a/src/android/startApp.java b/src/android/startApp.java
index adb2d4f..11501d3 100644
--- a/src/android/startApp.java
+++ b/src/android/startApp.java
@@ -21,12 +21,15 @@ package org.apache.cordova.startapp;
 import org.apache.cordova.CallbackContext;
 import org.apache.cordova.CordovaPlugin;
 import org.json.JSONArray;
+import org.json.JSONObject;
 import org.json.JSONException;
 
 import android.content.Context;
 import android.content.Intent;
 import android.content.ComponentName;
 import android.content.pm.PackageManager;
+import java.util.Iterator;
+import android.net.Uri;
 
 /**
  * This class provides access to vibration on the device.
@@ -51,11 +54,7 @@ public class startApp extends CordovaPlugin {
             this.start(args, callbackContext);
         }
 		else if(action.equals("check")) {
-			this.check(
-				args.getString(0), 
-				callbackContext,
-				this.cordova.getActivity().getApplicationContext()
-			);
+			this.check(args.getString(0), callbackContext);
 		}
 		
 		return true;
@@ -68,31 +67,85 @@ public class startApp extends CordovaPlugin {
      * startApp
      */
     public void start(JSONArray args, CallbackContext callback) {
-		// args.getString(0) - com name
-		// args.getString(1) - activity
-		// args.getString(2) - key
-		// args.getString(3) - value
+		/**
+		 * arguments
+		 * ['com.application.name']
+		 */
+		String com_name = null;
+		String activity = null;
+		Intent LaunchIntent;
+		
 		try {
-			Intent LaunchIntent = this.cordova.getActivity().getPackageManager().getLaunchIntentForPackage(args.getString(0));
+			if (args.get(0) instanceof JSONArray) {
+				com_name = args.getJSONArray(0).getString(0);
+				activity = args.getJSONArray(0).getString(1);                     
+			}
+			else {
+				com_name = args.getString(0);
+			}
+		
+			/**
+			 * call activity
+			 */
+			if(activity != null) {
+				if(com_name.equals("action")) {
+					// sample: android.intent.action.VIEW
+					LaunchIntent = new Intent("android.intent.action." + activity);
+				}
+				else {
+					LaunchIntent = new Intent();
+					LaunchIntent.setComponent(new ComponentName(com_name, activity));
+				}
+			}
+			else {
+				LaunchIntent = this.cordova.getActivity().getPackageManager().getLaunchIntentForPackage(com_name);
+			}
 			
-			if(args.length() > 3) {
-				ComponentName comp = new ComponentName(args.getString(0), args.getString(1));
-				LaunchIntent.setComponent(comp);
-				LaunchIntent.putExtra(args.getString(2), args.getString(3));
+			/**
+			 * put arguments
+			 */
+			if(args.length() > 1) {
+				JSONArray params = args.getJSONArray(1);
+				JSONObject key_value;
+				String key;
+				String value;
+
+				for(int i = 0; i < params.length(); i++) {
+					if (params.get(i) instanceof JSONObject) {
+						Iterator<String> iter = params.getJSONObject(i).keys();
+						
+						 while (iter.hasNext()) {
+							key = iter.next();
+							try {
+								value = params.getJSONObject(i).getString(key);
+								
+								LaunchIntent.putExtra(key, value);
+							} catch (JSONException e) {
+								callback.error("json params: " + e.toString());
+							}
+						}
+					}
+					else {
+						LaunchIntent.setData(Uri.parse(params.getString(i)));
+					}
+				}
 			}
 			
 			this.cordova.getActivity().startActivity(LaunchIntent);
 			callback.success();
+			
+		} catch (JSONException e) {
+			callback.error("json: " + e.toString());
 		} catch (Exception e) {
-			callback.error(e.toString());
+			callback.error("intent: " + e.toString());
         }
     }
 
     /**
      * checkApp
      */	 
-	public void check(String component, CallbackContext callback, Context context) {
-		PackageManager pm = context.getPackageManager();
+	public void check(String component, CallbackContext callback) {
+		PackageManager pm = this.cordova.getActivity().getApplicationContext().getPackageManager();
 		try {
 			pm.getPackageInfo(component, PackageManager.GET_ACTIVITIES);
 			callback.success();