Hi everyone:
take a look at the following code:

Code: Select all

package com.android.test;

import com.google.android.maps.GeoPoint;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class test extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        setGeoPoint();
    }
   
   private GeoPoint[] station_geo;

    private void setGeoPoint() {
      try {
         station_geo[0] = new GeoPoint((int) (39.902420 * 1000000),
               (int) (116.425728 * 1000000));
         station_geo[1] = new GeoPoint((int) (39.895458 * 1000000),
               (int) (116.321274 * 1000000));
         }
                catch (Exception e) {
         Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
                                   }
   }
}

when i run this app on the android emulator, an alertdialog occurred 'the application test has stopped unexceptedly. please try again.' as a rookie in android dev, i don't quite catch it. what's the problem here? thanks for ur help!

damninggodson wrote:Hi everyone:
take a look at the following code:

Code: Select all

package com.android.test;

import com.google.android.maps.GeoPoint;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class test extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        setGeoPoint();
    }
   
   private GeoPoint[] station_geo;

    private void setGeoPoint() {
      try {
         station_geo[0] = new GeoPoint((int) (39.902420 * 1000000),
               (int) (116.425728 * 1000000));
         station_geo[1] = new GeoPoint((int) (39.895458 * 1000000),
               (int) (116.321274 * 1000000));
         }
                catch (Exception e) {
         Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
                                   }
   }
}

when i run this app on the android emulator, an alertdialog occurred 'the application test has stopped unexceptedly. please try again.' as a rookie in android dev, i don't quite catch it. what's the problem here? thanks for ur help!

Try using the DDMS tool in the ~\android*\tools directory, taht should give you some more information on the error. You should see a bunch of red text and then the error at some line in test.java

what your logcat shows ?? if you can put it here that might help solving

thx for the 2 replies!

someone helped me find the problems this morning, it's because i didn't add

Code: Select all

<uses-library android:name="com.google.android.maps"/>

in my code and i made mistakes when i was declaring an array of GeoPoint, it should be like this:

Code: Select all

GeoPoint[] station_geo = new GeoPoint[n];// n is the num of elements in the array

so mission clear~ hope this post can be useful to others who meet the same troubles in the future.cheers.