Programmatically determine if App is running on Android Emulator

public static int dpToPx(int dp)
{
    return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}

public static int pxToDp(int px)
{
    return (int) (px / Resources.getSystem().getDisplayMetrics().density);
}

import java.util.Map;
import java.util.TreeMap;

public class MainClass {
	public static void main(String[] arg) {

		// english;germany dictionary
		String[] arrayOfString = { "one;eine", "two;zwei", "two sets of;zwei"
				, "three;drei", "four;vier" };

		Map<String, String> map = new TreeMap<String, String>();

		for (String s : arrayOfString) {
			String[] array = s.split(";");
			String sKey = "", sValue = "";
			if (array.length > 1) {
				sKey = array[0];
				sValue = array[1];
				map.put(sKey, sValue);
			}
		}
    Object[] objectArrayOfValues = map.values().toArray();
	for (int i = 0; i < objectArrayOfValues.length; i++) {
		System.out.println(objectArrayOfValues[i]);
	}
		 
		
	}// end main

}
/*
vier
eine
drei
zwei
zwei
 */

public class ApokusActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}
		
		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = new Paint();
			
			canvas.drawColor(Color.YELLOW);
            
	         
	         paint.setFilterBitmap(true);
	         Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),R.drawable.flower_blue);
	         int targetWidth  = bitmapOrg.getWidth() * 2;
	         int targetHeight = bitmapOrg.getHeight() * 2;
	         Bitmap bmp = Bitmap.createBitmap(targetWidth, targetHeight,Bitmap.Config.ARGB_8888);
	         RectF rectf = new RectF(0, 0, targetWidth, targetHeight);
	         Canvas c = new Canvas(bmp);
	         Path path = new Path();
	         path.addRect(rectf, Path.Direction.CW);
	         c.clipPath(path);
	         c.drawBitmap( bitmapOrg, new Rect(0, 0, bitmapOrg.getWidth(), bitmapOrg.getHeight()),
	                         new Rect(0, 0, targetWidth, targetHeight), paint);
	         Matrix matrix = new Matrix();
	         matrix.postScale(1f, 1f);
	         Bitmap resizedBitmap = Bitmap.createBitmap(bmp, 0, 0, targetWidth, targetHeight, matrix, true);
	         int h = bitmapOrg.getHeight();
           canvas.drawBitmap(bitmapOrg, 10,10, paint);
           canvas.drawBitmap(resizedBitmap, 10,10 + h + 10, paint);
           
		}

	}
}

package com.asynctaskexample;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {
	private TextView textView;
	private ProgressBar progressBar;
	private DownloadWebPageTask mTask = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		textView = (TextView) findViewById(R.id.TextView01);
		downloadPage();
	}

	// AsyncTask <TypeOfVarArgParams , ProgressValue , ResultValue> .
	private class DownloadWebPageTask extends AsyncTask<String, Integer, String> {

		@Override
		protected void onPreExecute() {
			//textView.setText("Hello !!!");
			progressBar = (ProgressBar) findViewById(R.id.progressBar1);
			progressBar.setVisibility(View.VISIBLE);
			super.onPreExecute();
		}

		@Override
		protected void onProgressUpdate(Integer... values) {
			super.onProgressUpdate(values);

		}

		@Override
		protected String doInBackground(String... urls) {
			String response = "";
			for (String url : urls) {
				DefaultHttpClient client = new DefaultHttpClient();
				HttpGet httpGet = new HttpGet(url);
				try {
					HttpResponse execute = client.execute(httpGet);
					InputStream content = execute.getEntity().getContent();

					BufferedReader buffer = new BufferedReader(new InputStreamReader(
							content));
					String s = "";
					while ((s = buffer.readLine()) != null) {
						response += s;
					}

				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			return response;
		}

		@Override
		protected void onPostExecute(String result) {
			progressBar.setVisibility(View.INVISIBLE);
			textView.setText(result);
		}
	}

	private void downloadPage() {
		if (mTask != null
				&& mTask.getStatus() != DownloadWebPageTask.Status.FINISHED) {
			mTask.cancel(true);
		}
               // execute(String[]) you can put array of links to web pages, or array of Integer[] 
               // if first param is Integer[] etc.
		mTask = (DownloadWebPageTask) new DownloadWebPageTask()
				.execute(new String[] { "//android.okhelp.cz/android-market.html",
						"//android.okhelp.cz/android-market.html" });
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();

		if (mTask != null
				&& mTask.getStatus() != DownloadWebPageTask.Status.FINISHED) {
			mTask.cancel(true);
			mTask = null;
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}

<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ProgressBar
        android:id="@+id/progressBar1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</LinearLayout>

<uses-permission android:name="android.permission.INTERNET" />

    <string name="template_user_agent">"%s/%s (Linux; Android)"</string>
    <string name="template_wotd_title">"Wiktionary:Word of the day/%s %s"</string>
    <string name="template_define_url">"//en.wiktionary.org/wiki/%s"</string>

   <string name="template_user_agent" translatable="false">"%1$s/%2$s (Linux; Android)"</string>
    <string name="template_wotd_title">"Wiktionary:Word of the day/%1$s %2$s"</string>
    <string name="template_define_url" translatable="false">"//en.wiktionary.org/wiki/%s"</string>