github.com/c-darwin/mobile@v0.0.0-20160313183840-ff625c46f7c9/app/work-cross/GoNativeActivity.java

package org.golang.app;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.pm.ActivityInfo;
import android.app.NativeActivity;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.content.Intent;
import android.net.Uri;
import android.app.PendingIntent;
import android.content.Context;
import android.widget.Toast;
import android.app.TaskStackBuilder;
import android.support.v4.app.NotificationCompat;
import android.view.KeyCharacterMap;
import org.chromium.base.library_loader.LibraryLoader;
import org.xwalk.core.XWalkView;
import android.widget.LinearLayout;

public class GoNativeActivity extends NativeActivity {

    private static GoNativeActivity goNativeActivity;

	private LinearLayout commentsLayout;
	private XWalkView mXWalkView;


    public GoNativeActivity() {
        super();
		Log.d("Go", "GoNativeActivity");
        goNativeActivity = this;
    }  
        
    public void openBrowser(String url) {
    	  	Intent intent = new Intent(Intent.ACTION_VIEW);
			Uri data = Uri.parse("http://localhost:8089");
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			  intent.setData(data);
			  startActivity(intent);
    }
    
    public void notif(String title, String text) {

	  Log.d("Go", "GoNativeActivity notif");

  	  Intent intent = new Intent("org.golang.app.MainActivity");	    

	  NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
	  mBuilder.setSmallIcon(R.drawable.icon);
	  mBuilder.setContentTitle(title);
	  mBuilder.setContentText(text);
	          
	  Intent resultIntent = new Intent(this, MainActivity.class);
	  TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
	  stackBuilder.addParentStack(MainActivity.class);

	  // Adds the Intent that starts the Activity to the top of the stack
	  stackBuilder.addNextIntent(resultIntent);
	  PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
	  mBuilder.setContentIntent(resultPendingIntent);

	  NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    
	  // notificationID allows you to update the notification later on.
	  mNotificationManager.notify(2, mBuilder.build());

    }    

    String getTmpdir() {
        return getCacheDir().getAbsolutePath();
    }

    String getFilesdir() {
		return getExternalFilesDir(null).getAbsolutePath();
    }

	int getRune(int deviceId, int keyCode, int metaState) {
		try {
			int rune = KeyCharacterMap.load(deviceId).get(keyCode, metaState);
			if (rune == 0) {
				return -1;
			}
			return rune;
		} catch (KeyCharacterMap.UnavailableException e) {
			return -1;
		} catch (Exception e) {
			Log.e("Go", "exception reading KeyCharacterMap", e);
			return -1;
		}
	}

    public static void load() {

		Log.d("Go", "GoNativeActivity load 00001");
        // Interestingly, NativeActivity uses a different method
        // to find native code to execute, avoiding
        // System.loadLibrary. The result is Java methods
        // implemented in C with JNIEXPORT (and JNI_OnLoad) are not
        // available unless an explicit call to System.loadLibrary
        // is done. So we do it here, borrowing the name of the
        // library from the same AndroidManifest.xml metadata used
        // by NativeActivity.
		try {
			System.loadLibrary("dcoin");

		} catch (Exception e) {
			Log.e("Go", "loadLibrary failed", e);
		}



	}

    public void onStart(Bundle savedInstanceState) {

		Log.d("Go", "GoNativeActivity onStart");
		try {
			Intent intent = new Intent(Intent.ACTION_VIEW);
			Uri data = Uri.parse("http://localhost:8089");
			intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			intent.setData(data);
			startActivity(intent);
		} catch (Exception e) {
			  Log.e("Go", "http://localhost:8089 failed", e);
		 }
		/*Runnable r = new Runnable() {
			public void run() {
				if (MyService.DcoinStarted(8089)) {
					try {
						Intent intent1 = new Intent(Intent.ACTION_VIEW);
						Uri data = Uri.parse("http://localhost:8089");
						intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
						intent1.setData(data);
						startActivity(intent1);
					} catch (Exception e) {
						Log.e("Go", "http://localhost:8089 failed", e);
					}
				}
			}
		};
		Thread t = new Thread(r);
		t.start();*/
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {

		Log.d("Go", "GoNativeActivity onCreate");

		/*try {
			System.load("xwalkcore");
		} catch (UnsatisfiedLinkError e) {
			System.err.println("xwalkcore code library failed to load 0.\n" + e);
			System.exit(1);
		}
		try {
			System.load("xwalkdummy");
		} catch (UnsatisfiedLinkError e) {
			System.err.println("xwalkdummy code library failed to load 1.\n" + e);
			System.exit(1);
		}

		setContentView(R.layout.activity_xwalk_embed_lib);
		commentsLayout=(LinearLayout)findViewById(R.id.principal);
		mXWalkView = new XWalkView(this, this);
	  final String html = "<html><body bgcolor=\"#090998\"><h1>Hello world!</h1></body></html>";
            mXWalkView.load(null, html);
            commentsLayout.addView(mXWalkView);

		//moveTaskToBack(true);*/

        super.onCreate(savedInstanceState);        
    }
}