Unity plugin call android Activity implements TextureView.SurfaceTextureListener!

I need add mirrored video midea player in Unity plugin from Android project.

So , I use TextureView to show my mp4 file , and I have build Android native project success work in my android device.

But , when I build a jar file import to my unity project , run the application will crash.

This is my Android code "mirrored video.class" :

         import android.app.Activity;
         import android.content.pm.ActivityInfo;
         import android.graphics.SurfaceTexture;
         import android.media.AudioManager;
         import android.os.Bundle;
         import android.util.Log;
         import android.view.MenuItem;
         import android.view.Surface;
         import android.view.TextureView;
 
 public class mirroredvideo extends Activity implements TextureView.SurfaceTextureListener{
 
     boolean isMirrored = true;
     public CustomMediaPlayer customMediaPlayer;
     public String video_url = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         try
         {
             int layoutID = getResources().getIdentifier("activity_mirroredvideo", "layout", getPackageName());
             int textureViewID = getResources().getIdentifier("mirrored_textureView", "id", getPackageName());
             setContentView(layoutID);
             //video_url = this.getIntent().getStringExtra("VURL"); // your URL here
             video_url = "http://devstreaming.apple.com/videos/wwdc/2015/217wu453thu1r1/217/217_hd_adopting_new_trackpad_features.mp4";
             customMediaPlayer = new CustomMediaPlayer ();
             TextureView textureView = (TextureView)findViewById(textureViewID);
             textureView.setSurfaceTextureListener(this);
             textureView.setScaleX(isMirrored ? -1 : 1);
         }catch (Error e)
         {
             Log.v("mirroredvideo","catch error : "+e);
         }
 
 
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         return super.onOptionsItemSelected(item);
     }
 
 
     @Override
     public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
 
         try {
             customMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
             customMediaPlayer.setSurface(new Surface(surface));
             customMediaPlayer.setDataSource(video_url);
             customMediaPlayer.prepare(); // might take long! (for buffering, etc)
             customMediaPlayer.start();
 
             if(customMediaPlayer.isPlaying())
             {
                 Log.v("customMediaPlayer:","customMediaPlayer really start..");
             }
 
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
 
     @Override
     public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
 
     }
 
     @Override
     public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
         return false;
     }
 
     @Override
     public void onSurfaceTextureUpdated(SurfaceTexture surface) {
 
     }
 
     @Override
     protected void onPause() {
         super.onPause();
         customMediaPlayer.pause();
     }
 
     @Override
     protected void onDestroy() {
         super.onDestroy();
         customMediaPlayer.stop();
     }
 
     @Override
     protected void onRestart() {
         super.onRestart();
         customMediaPlayer.start();
     }
 
     @Override
     protected void onResume() {
         if(getRequestedOrientation()!= ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
             setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
         }
         super.onResume();
     }
 
 }

And I create a class "CustomMediaPlayer.class" :

 import android.media.MediaPlayer;
 
 import java.io.IOException;
 
 /**
  * Created by playar on 2016/2/24.
  */
 class CustomMediaPlayer extends MediaPlayer
 {
     String dataSource;
 
     @Override
     public void setDataSource(String path) throws IOException, IllegalArgumentException, SecurityException, IllegalStateException
     {
         // TODO Auto-generated method stub
         super.setDataSource(path);
         dataSource = path;
     }
 
     public String getDataSource()
     {
         return dataSource;
     }
 }

Then , this is my request and response with Unity class "requestUnity.class" :

 public class requestUnity extends UnityPlayerActivity{
 
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
     }
 
 
     public static void videomirrored(Activity gactivity) {
         Intent intent = new Intent(gactivity, mirroredvideo.class);
         gactivity.startActivity(intent);
     }
 }

Finally , this is my unity C# script code :

         using (AndroidJavaClass androidJC = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
         { 
             using(AndroidJavaObject jo = androidJC.GetStatic<AndroidJavaObject>("currentActivity"))
             {
                 using(AndroidJavaClass jc = new AndroidJavaClass("com.xxx.xxx.requestUnity"))
                 {
                     jc.CallStatic("videomirrored", jo);
                 }
             }
         } 

There is my crash log when I run this application :

And I have find the application can't run to onSurfaceTextureAvailable function! (If in the native code project , it's nice work for me.) Did anyone can help me this problem ?