Read more Android data on Unity app launch

Question

I am launching a Unity application from another Android application using an implicit intent. This works fine, but I can't figure out how to read extra data in Unity?

ANDROID HISTORY TO START APP UNITY

i=new Intent(); i.setAction("com.company.unityapp.MyMethod"); i.putExtra("KEY","This is the message string"); startActivity(i); 

UNITY APP AndroidManifest.xml

 <intent-filter> <action android:name="com.company.unityapp.MyMethod" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> 

I have a GameObject in my scene with a script application. Inside the launch method, I have this code to try and read the extra data that was transmitted along with the intent

 AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer"); AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity"); AndroidJavaObject intent = currentActivity.Call<AndroidJavaObject>("getIntent"); bool hasExtra = intent.Call<bool> ("hasExtra", "arguments"); if (hasExtra) { AndroidJavaObject extras = intent.Call<AndroidJavaObject> ("getExtras"); arguments = extras.Call<string> ("getString", "arguments"); } 

This does not work, and the arguments are always empty. Any help would be appreciated.

Answer 1

It took me a while to figure this out. All solutions found on the Internet were only partially completed. Below is the complete solution to launch a Unity application from another Android application using a custom implicit intent, as well as access to additional data sent with intent inside Unity.

To do this, you need to create an Android plugin that will be used by Unity to access additional intent data.

ANDROID PLUGIN:

---

You need to copy class.jar from the Unity installation folder to the plugin folder android / classes.jar .//

 public class MainActivity extends UnityPlayerActivity { @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); handleNewIntent(intent); } private void handleNewIntent(Intent intent){ String text = intent.getStringExtra("KEY"); UnityPlayer.UnitySendMessage("AccessManager","OnAccessToken", text); } } 

AndroidManifest.xml

It is important to use the package name: com.company.plugin

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.company.plugin"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:label="@string/app_name" android:theme="@style/AppTheme.NoActionBar"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> 

Gradle build file:

Add the following to your gradle build file: to create a .jar file for use with Unity

 android { compileSdkVersion 23 buildToolsVersion "23.0.2" sourceSets { main { java { srcDir 'src/main/java' } } } ... ... dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:23.2.1' compile 'com.android.support:design:23.2.1' compile files('libs/classes.jar') } //task to delete the old jar task deleteOldJar(type: Delete) { delete 'release/AndroidPlugin.jar' } //task to export contents as jar task exportJar(type: Copy) { from('build/intermediates/bundles/release/') into('release/') include('classes.jar') ///Rename the jar rename('classes.jar', 'AndroidPlugin.jar') } exportJar.dependsOn(deleteOldJar, build) 

Copy the generated AndroidPlugin.jar to Unity Assets / Plugins / Android

UNITY APP:

---

Set the package identifier in PlayerSettings to the same settings as in Android Plugin - com.company.plugin

Create your own AndroidManifest.xml file in Assets / Plugins / Android

It is important here to use the same package name that is used in the plugin. Also note the name of the intent: com.company.plugin.do

AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.company.plugin" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="9" /> <application android:label="@string/app_name"> <activity android:name=".MainActivity" android:label="@string/app_name" android:launchMode="singleTask" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:screenOrientation="sensor"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <action android:name="com.company.plugin.do" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="text/plain"/> </intent-filter> </activity> </application> </manifest> 

Create a unity script called AccessManager and attach the script to the game object in the scene. OnAccessToken is a method that will receive a message sent from the android plugin and will contain additional data sent with intent.

 public class accessManager : MonoBehaviour { public void OnAccessToken(string accessToken) { Debug.Log("Message Received!!!! :" + accessToken); } } 

---

ANDROID APP:

Create a standard Android app that launches the Unity app and sends additional intent information

 public void LaunchUnityApp(){ Intent i=new Intent(); i.setAction("com.company.plugin.do"); i.setType("text/plain"); i.putExtra("KEY","This is the text message sent from Android"); startActivity(i); } 

Answer 2

This is a solution that does not require overriding Unity activity: https://blog.getsocial.im/android-unity-app-and-the-intent-issue/