MapActivity in Android 2

You can control google map further. 你可以更進一步地使用Google map。

1. mapdemo.java：再將上一篇的程式碼加上籃色部份，可用手機按鍵控制地圖，O為拉遠、I為拉近、S為衛星地圖、上下左右鍵為移動。

package com.test.demo; import com.google.android.maps.MapActivity; import android.os.Bundle; import android.view.KeyEvent; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.Point; public class mapdemo extends MapActivity{ /** Called when the activity is first created. */ public static final int change = 3000; private MapView mapView; private MapController mapConrtoller; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); //get id from main.xml mapView =(MapView) findViewById(R.id.my_map); mapConrtoller = mapView.getController(); mapConrtoller.zoomTo(17); updateView(); } public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_I) { // zoom in mapView.getController().zoomTo(mapView.getZoomLevel() + 1); return true; } else if (keyCode == KeyEvent.KEYCODE_O) { // zoom out mapView.getController().zoomTo(mapView.getZoomLevel() - 1); return true; } else if (keyCode == KeyEvent.KEYCODE_S) { // 衛星地图 if(!mapView.isSatellite()){ mapView.toggleSatellite(); } return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP) { Double lat = mapView.getMapCenter().getLatitudeE6()/1.0; Double lng = mapView.getMapCenter().getLongitudeE6()/1.0; lat=lat+change; Point point = new Point(lat.intValue(),lng.intValue()); mapConrtoller.animateTo(point); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) { Double lat = mapView.getMapCenter().getLatitudeE6()/1.0; Double lng = mapView.getMapCenter().getLongitudeE6()/1.0; lat=lat-change; Point point = new Point(lat.intValue(),lng.intValue()); mapConrtoller.animateTo(point); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) { Double lat = mapView.getMapCenter().getLatitudeE6()/1.0; Double lng = mapView.getMapCenter().getLongitudeE6()/1.0; lng=lng-change; Point point = new Point(lat.intValue(),lng.intValue()); mapConrtoller.animateTo(point); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) { Double lat = mapView.getMapCenter().getLatitudeE6()/1.0; Double lng = mapView.getMapCenter().getLongitudeE6()/1.0; lng=lng+change; Point point = new Point(lat.intValue(),lng.intValue()); mapConrtoller.animateTo(point); return true; } return false; } private void updateView(){ Double lat = 25.025708*1E6; Double lng = 121.526403*1E6; Point point = new Point(lat.intValue(), lng.intValue()); mapConrtoller.centerMapTo(point, false); } }