Launching Android Applications through Unity / Java plugins

Question

I'm attempting to connect my Unity project to Java via plugin in order to launch another application, and have been unsuccessful with attempts to do so.

Unity (C#):

public void AndroidCallNonStatic() {
    using (AndroidJavaClass javaClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) {
        using (AndroidJavaObject activity = javaClass.GetStatic<AndroidJavaObject>("currentActivity")) {
            object[] targs = new object[1] { "org.mozilla.firefox" };
            activity.Call("nonStaticMethod", targs);
        }
    }
}

Java (Android):

import com.unity3d.player.UnityPlayerActivity;
public class Main extends UnityPlayerActivity {

    public static Context mContext;
    public static PackageManager mManager;

    @Override
    protected void onCreate(Bundle bundle)
    {
            super.onCreate(bundle);
            mContext = this;
            mManager = getPackageManager();
    }

    public void nonStaticMethod(String s)
    {
            Log.d("TAG","nonStatic method was called");
            launchApp(s);
    }

    public static void StaticMethod(String s)
    {
            Log.d("TAG","Static method was called " + s);
            launchApp(s);
    }

    public void launchApp(String packageName)
    {
        Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);
        if (intent != null)
        {
            // Activity was found, launch new app
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
        }
        else
        {
            // Activity not found. Send user to market
            intent = new Intent(Intent.ACTION_VIEW);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setData(Uri.parse("market://details?id="+packageName));
            startActivity(intent);
        }
    }

}

Can anyone help me out with this? I've exhausted the extent of my Android/Unity knowledge and can't understand why it's not working. My thoughts are that it has something to do with the package name.

Answer 1

You can launch an Android application from Unity directly in C#:

public void LaunchApp(String packageName)
{
    AndroidJavaClass unityPlayer;
    AndroidJavaObject currentActivity;
    AndroidJavaObject packageManager;
    AndroidJavaObject launchIntent;

    unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
    packageManager = currentActivity.Call<AndroidJavaObject>("getPackageManager");
    launchIntent = packageManager.Call<AndroidJavaObject>("getLaunchIntentForPackage", packageName);
    currentActivity.Call("startActivity", launchIntent);
}