title: How to transfer data from one activity to another?
body: <p>I am trying to transfer data from one page to another but some problem is coming below is the code. I am trying to transfer value of variable using bundle from first activity to second but something is wrong please tell me whats going wrong.</p>
  
  <p>below is first activity:-</p>
  
  <pre><code>package route.planning;
  
  
  
  import android.app.Activity;
  import android.content.Context;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;
  import android.widget.Toast;
  
  
  public class login extends Activity {
      /** Called when the activity is first created. */
  
      Context mCtx;
      final static int START =0;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.main);
  
          mCtx = this;
  
  
          Button btn = (Button)findViewById(R.id.btn);
  
          btn.setOnClickListener(new OnClickListener(){
  
          //  @Override
          public void onClick(View v)
          {
              String fromLat = new String();
              String fromLong = new String();
              String toLat = new String();
              String toLong = new String();
  
              fromLat=String.valueOf(R.id.FromLatitude);
              fromLong=String.valueOf(R.id.FromLongitude);
              toLat=String.valueOf(R.id.ToLatitude);
              toLong=String.valueOf(R.id.ToLongitude);
  
  
              Intent intent = new Intent(mCtx, MapRouteActivity.class);
  
              /*Sending some arguments*/ 
              Bundle bundle = new Bundle();
  
                bundle.putString("fromLat",fromLat );
                bundle.putString("fromLong",fromLong );
                bundle.putString("toLat",toLat );
                bundle.putString("toLong",toLong );
  
  
                intent.putExtras(bundle);
  
              /*Start Activity*/
              mCtx.startActivity(intent);
  
              /*Start ActivityForResult*/
              ((Activity)mCtx).startActivityForResult(intent, 2);
          }
      });
      }
  
  
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          // TODO Auto-generated method stub
          super.onActivityResult(requestCode, resultCode, data);
  
          if(requestCode == START)
          {
  
              Toast.makeText(mCtx, Integer.toString(resultCode), Toast.LENGTH_SHORT).show();
          }
      }
  
  
      @Override
      public void onDestroy(){
          super.onDestroy();
          finish();
      }
  }
  </code></pre>
  
  <p>Below is part of second activity where i am trying to get value from above</p>
  
  <pre><code>import java.io.IOException;
  import java.io.InputStream;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.net.URLConnection;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.ci.geo.route.Road;
  import org.ci.geo.route.RoadProvider;
  
  import route.planning.R;
  
  import android.graphics.Canvas;
  import android.graphics.Color;
  import android.graphics.Paint;
  import android.graphics.Point;
  import android.os.Bundle;
  import android.os.Handler;
  import android.widget.LinearLayout;
  import android.widget.TextView;
  
  import com.google.android.maps.GeoPoint;
  import com.google.android.maps.MapActivity;
  import com.google.android.maps.MapController;
  import com.google.android.maps.MapView;
  import com.google.android.maps.Overlay;
  
  public class MapRouteActivity extends MapActivity {
  
          LinearLayout linearLayout;
          MapView mapView;
          private Road mRoad;
  
          @Override
          public void onCreate(Bundle savedInstanceState) {
                  super.onCreate(savedInstanceState);
                  setContentView(R.layout.routeplanning);
                  mapView = (MapView) findViewById(R.id.mapview);
                  mapView.setBuiltInZoomControls(true);
  
                  Bundle extras = this.getIntent().getExtras();
                  final String fLat=extras.getString("fromLat");
                  final String fLong=extras.getString("fromLong");
                  final String tLat=extras.getString("toLat");
                  final String tLong=extras.getString("toLong");
  
  
  
                  new Thread() {
                          @Override
                          public void run() {
  
                              double fromLat=Double.parseDouble(fLat);
                              double fromLon=Double.parseDouble(fLong);
                              double toLat=Double.parseDouble(tLat);
                              double toLon=Double.parseDouble(tLong);
                                //double fromLat = 28.6353, fromLon = 77.2250, toLat = 30.7313, toLon = 76.7754;
                                  /***url contains the path to fetch the kml file from the internet*/
                                  String url = RoadProvider
                                                  .getUrl(fromLat, fromLon, toLat, toLon);
                                  InputStream is = getConnection(url);
                                  mRoad = RoadProvider.getRoute(is);
                                  mHandler.sendEmptyMessage(0);
                          }
                  }.start();
          }
  </code></pre>