我想在Android活动上调用Unity功能

Question

public void CameraOnClick(){

    using (AndroidJavaClass javaClass = new AndroidJavaClass ("com.d3d.viewer.NativePlugin")) {
        using (AndroidJavaObject currentActivity = javaClass.CallStatic<AndroidJavaObject> ("instance")) {
            Debug.Log ("Start Camera@@@@@@@@@@@@");
            //javaClass.CallStatic ("showCamera");
            currentActivity.Call("showCamera");
        }
}

}

public void getimageUrl1(string ImageUrl){
    imageurl1 = ImageUrl;
    Debug.Log ("ImageUrl11111111111111111111"+ImageUrl);
}

Android来源

public class NativePlugin extends UnityPlayerActivity {

    final Activity b = m_instance;

    final Activity a = UnityPlayer.currentActivity;

    private static NativePlugin m_instance;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        UnityPlayer.UnitySendMessage("PlusPopupManager","getimageUrl1","22222");      //don't activate

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, 1);



    }

    public static NativePlugin instance()
    {
        if(m_instance == null)
        {

            m_instance = new NativePlugin();
        }
        return m_instance;
    }



    public void showCamera ()     // Connect Camera
    {

        UnityPlayer.UnitySendMessage("PlusPopupManager","getimageUrl1","111111");  //activate

        a.runOnUiThread(new Runnable()
        {
            public void run() {
                Intent intent = new Intent(a, NativePlugin.class);
               a.startActivity(intent);
            }
        });




    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        UnityPlayer.UnitySendMessage("PlusPopupManager","getimageUrl1","333333");//don't activate


    }
}

manifast.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.d3d.viewer">

    <application android:allowBackup="true" android:label="@string/app_name"
        android:supportsRtl="true">

        <activity android:name="com.d3d.viewer.NativePlugin"  android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:label="@string/app_name" android:screenOrientation="landscape" android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" android:launchMode="singleTask">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>

        </activity>



    </application>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature android:name="android.hardware.camera" />
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-feature android:name="android.hardware.camera.autofocus"/>

</manifest>

我制作ARR android插件。并导入Unity3d。

当我调用'showCamera'时，会激活'UnityPlayer.UnitySendMessage'。 但是当我调用intent（NativePlugin）函数时不要激活。

为什么不在Android活动上调用'UnityPlayer.UnitySendMessage'功能。