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1. Eclipse
2. Android SDK
3. å¼åAndroidç¨åºçEclipse æ件
为äºå¼å§æ们çå·¥ä½ï¼é¦å è¦å®è£ Eclipseï¼ç¶åä»Googleçç½ç«è·å¾Android SDKï¼å¹¶ä¸å®è£ Eclipseæ件ã
äºãActivityç±»
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public class LocateMe extends Activity{public void onCreate(Bundle params){
super.onCreate(params);
setContentView(R.layout.main);
}
public boolean onKeyDown(int keyCode,驱驱动java 源码排序 KeyEvent event){
return true;
}
}
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Viewç±»æ¯Androidçä¸ä¸ªè¶ ç±»ï¼è¿ä¸ªç±»å ä¹å å«äºææçå±å¹ç±»åãä½å®ä»¬ä¹é´æä¸äºä¸åãæ¯ä¸ä¸ªviewé½æä¸ä¸ªç¨äºç»ç»çç»å¸ãè¿ä¸ªç»å¸å¯ä»¥ç¨ æ¥è¿è¡ä»»ææ©å±ãæ¬æ为äºæ¹ä¾¿èµ·è§ï¼åªæ¶åå°äºä¸¤ä¸ªä¸»è¦çViewç±»åï¼å®ä¹ViewåAndroidçXMLå 容Viewãå¨ä¸é¢ç代ç ä¸ï¼ä½¿ç¨çæ¯ âHello Worldâ XML Viewï¼å®æ¯ä»¥é常èªç¶çæ¹å¼å¼å§çã
å¦ææ们æ¥çä¸ä¸æ°çAndroidå·¥ç¨ï¼å°±ä¼åç°ä¸ä¸ªå«main.xmlçæ件ãå¨è¿ä¸ªæ件ä¸ï¼éè¿ä¸ä¸ªç®åçXMLæ件ï¼æè¿°äºä¸ä¸ªå±å¹çå¸å±ãè¿ä¸ª ç®åçxmlæ件çå 容å¦ä¸ï¼
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="/apk/res/android"
androidrientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerHoriz
android:text="ress the center key to locate yourself"
/>
</RelativeLayout>
ä¸é¢çå 容çåè½çèµ·æ¥é常ææ¾ãè¿ä¸ªç¹æ®æ件å®ä¹äºä¸ä¸ªç¸å ³çå¸å±ï¼è¿å°±æå³çéè¿ä¸ä¸ªå ç´ å°å¦ä¸ä¸ªå ç´ çå ³ç³»ææ¯å®ä»¬ç¶å ç´ çå ³ç³»æ¥æè¿°ã对äºè§å¾æ¥ 说ï¼æä¸äºç¨äºå¸å±çæ¹æ³ï¼ä½æ¯å¨æ¬æä¸åªå ³æ³¨äºä¸è¿°çxmlæ件ã
RealtiveLayoutä¸å å«äºä¸ä¸ªå¡«å æ´ä¸ªå±å¹çææ¬æ¡ï¼ä¹å°±æ¯æ们çLocateMe activityï¼ãè¿ä¸ªLocateMe activityå¨é»è®¤æ åµä¸æ¯å ¨å±çï¼å æ¤ï¼ææ¬æ¡å°ç»§æ¿è¿ä¸ªå±æ§ï¼å¹¶ä¸ææ¬æ¡å°å¨å±å¹çå·¦ä¸è§æ¾ç¤ºãå¦å¤ï¼å¿ 须为è¿ä¸ªXMLæ件设置ä¸ä¸ªå¼ç¨æ°ï¼ä»¥ä¾¿ Androidå¯ä»¥å¨æºä»£ç ä¸æ¾å°å®ãå¨é»è®¤æ åµä¸ï¼è¿äºå¼ç¨æ°è¢«ä¿åå¨R.javaä¸ï¼ä»£ç å¦ä¸ï¼
public final class R{public static final class layout{
public static final int main=0x7f;
}
}
è§å¾ä¹å¯ä»¥è¢«åµå¥ï¼ä½åJ2MEä¸åï¼æ们å¯ä»¥å°å®å¶çè§å¾åAndroidå¢éåå¸çWidgetsä¸èµ·ä½¿ç¨ãå¨J2MEä¸ï¼å¼å人å被迫éæ© GameCanvasåJ2MEåºç¨ç¨åºç»å¸ãè¿å°±æå³çå¦ææ们æ³è¦ä¸ä¸ªå®å¶çææï¼å°±å¿ é¡»å¨GameCanvasä¸éæ°è®¾è®¡æ们ææçwidgetã Androidè¿ä¸ä» ä» æ¯è¿äºï¼è§å¾ç±»åä¹å¯ä»¥æ··å使ç¨ãAndroidè¿å¸¦äºä¸ä¸ª widgetåºï¼è¿ä¸ªç±»åºå æ¬äºæ»å¨æ¡ï¼ææ¬å®ä½ï¼è¿åº¦æ¡ä»¥åå ¶ä»å¾å¤æ§ä»¶ãè¿äºæ åçwidgetå¯ä»¥è¢«éè½½æ被æçæ们çä¹ æ¯å®å¶ãç°å¨è®©æ们æ¥è¿å ¥ æ们çä¾åã
åãAndroidå®ä¾
è¿ä¸ªæ¼ç¤ºåºç¨ç¨åºå°æ¼ç¤ºäºç¨æ·çå½åçç»åº¦å纬度ï¼å¨ææ¬æ¡ä¸æ¾ç¤ºï¼ãonCreateæé æ¹æ³å°åä¸é¢çä¾ååºæ¬ç¸åï¼é¤äºå¨å ¶ä¸å å ¥äºé®çå¤çï¼ç°å¨ 让æ们çä¸ä¸onKeyDownç代ç ã
public boolean onKeyDown(int keyCode, KeyEvent event){if(keyCode != KeyEvent.KEYCODE_DPAD_CENTER || m_bLoading)
{
return true;
}
m_bLoading = true;
getLocation();
return true;
}
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private void getLocation(){Location loc;
LocationManager locMan;
LocationProvider locPro;
List<LocationProvider> proList;
setContentView(R.layout.laoding);
locMan = (LocationManager) getSystemService(LOCATION_SERVICE);
proList = locMan.getProviders();
locPro = proList.get(0);
loc = locMan.getCurrentLocation(locPro.getName());
Lat = (float)loc.getLatitude();
Lon = (float)loc.getLongitude();
CreateView();
setContentView(customView);
}
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读è è¦æ³¨æçæ¯ï¼å¨ç¼è¯æ¶ï¼Androidä¼é¢å å°ææçXMLå¸å±æ°æ®å è£ èµ·æ¥ãå¦ææ们æ³å¨ç¼è¯åååå¸å±å±æ§ï¼æçè§å®ï¼æä»¬å¿ é¡»å¨æºç¨åºä¸åè¿äº äºã
è·å¾LocationManagerçå¯ä¸æ¹æ³æ¯éè¿getSystemService()æ¹æ³çè°ç¨ãéè¿ä½¿ç¨LocationManagerï¼ æ们å¯ä»¥è·å¾ä¸ä¸ªä½ç½®æä¾è çå表ãå¨ä¸ä¸ªçå®çææ设å¤ä¸ï¼è¿ä¸ªå表å å«äºä¸äºGPSæå¡ãå®é ä¸ï¼æ们å¸æéæ©æ´å¼ºå¤§ï¼æ´ç²¾ç¡®ï¼æåä¸å¸¦æå ¶ä»éå æ å¡çGPSãç°å¨ï¼å¨æ¨¡æå¨ä¸æä¾äºä¸ä¸ªç¨äºæµè¯çGPSï¼è¿ä¸ªGPSæ¥èªSan Franciscoãå®å¶çGPSæ件å¯ä»¥å¯ä»¥è¢«ä¸ä¼ ï¼å¹¶è¿è¡æµè¯ãå¦ææ们è¦æµè¯æ´å¤æçåºç¨ï¼æ¥èªSan FranciscoçGPSå¯è½å¹¶ä¸éåã
ç®åæ们å¯ä»¥ä½¿ç¨ä½ç½®ç®¡çå¨åä½ç½®æä¾è è¿è¡getCurrentLocationçè°ç¨ãè¿ä¸ªæ¹æ³è¿åæ¬æºçå½åä½ç½®çä¸ä¸ªå¿«ç §ï¼è¿ä¸ªå¿«ç §å°ä»¥ Location对象形å¼æä¾ãå¨ææ设å¤ä¸ï¼æ们å¯ä»¥è·å¾å½åä½ç½®çç»åº¦å纬度ãç°å¨ï¼ä½¿ç¨è¿ä¸ªèæçææ设å¤ï¼æ们å¯ä»¥è·å¾è¿ä¸ªä¾åç¨åºçæç»ç»æï¼ å»ºç«äºæ¾ç¤ºä¸ä¸ªå®å¶çè§å¾ã
äºã使ç¨å®å¶è§å¾
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public void CreateView(){customView = new CustomView(this);
}
è¿ä¸ªæ¹æ³ç®åå°è°ç¨äºCustomView对象çæé æ¹æ³ãCustomViewç±»çå®ä¹å¦ä¸ï¼
public class CustomView extends View{LocateMe overlord;
public CustomView(LocateMe pCtx){
super(pCtx);
overlord = pCtx;
}
public void onDraw(Canvas cvs){
Paint p = new Paint();
String sLat = "Latitude: " + overlord.getLat();
String sLon = "Longitude: " + overlord.getLon();
cvs.drawText(sLat , , , p);
cvs.drawText(sLon, , , p);
}
}
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