1、使用Android Google Map Api之前必須檢測系統中是否安裝了Google map 應用,檢測方法如下:
protected boolean checkGoogleMap(){
lean isInstallGMap = false;
List<PackageInfo>
packs = getPackageManager().getInstalledPackages(0);
for (int i = 0; i < packs.size(); i++) {
PackageInfo p = packs.get(i);
if (p.versionName == null) { // system packages
continue;
}
if ("com.google.android.apps.maps".equals(p.packageName)) {
isInstallGMap = true;
break;
}
}
return isInstallGMap;
}
2、當檢測出系統中沒有安裝Google map 應用時,可以轉向Web版的Google map 來訪問,如下:
1 Intent it = new Intent(
2 Intent.ACTION_VIEW, Uri.parse(
3 "http://ditu.google.cn/maps?hl=zh&mrt=loc&q="+weiduExtra+",
4 "+jingduExtra+""));
5 startActivity(it);
6 注意:使用此方法需在AndroidManifest.xml中加入網路存取權限
7 <uses-permission android:name="android.permission.INTERNET">
8 </uses-permission>
3、當檢測出系統中已經安裝Google map 應用時,我們就可以使用Google map api 了,使用方法如下:
1)方法一:
Intent it = new Intent(
Intent.ACTION_VIEW, Uri.parse("geo:"+weiduExtra+",
"+jingduExtra));
startActivity(it);
注意:使用此方法需在AndroidManifest.xml中加入相應的存取權限
<uses-permission android:name="android.permission.
ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.
INTERNET" />
2)方法二:
可以建立一個MapActivity的子類,將MapView顯示於其上即可,可以用MapController來控制顯示的座標、地圖模式和視野高度,處理起來非常簡單。
public class MapTest extends MapActivity {
private MapView mapView;
private MapController mc;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapview);
mapView = (MapView) findViewById(R.id.map);
mapView.setTraffic(true);
mc = mapView.getController();
GeoPoint gp = new GeoPoint((int) (30.659259 * 1000000),
(int) (104.065762 * 1000000)); //地理座標
mc.animateTo(gp);
mc.setZoom(12);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
public class MapTest extends MapActivity {
private MapView mapView;
private MapController mc;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapview);
mapView = (MapView) findViewById(R.id.map);
mapView.setTraffic(true);
mc = mapView.getController();
GeoPoint gp = new GeoPoint((int) (30.659259 * 1000000),
(int) (104.065762 * 1000000)); //地理座標
mc.animateTo(gp);
mc.setZoom(12);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
mapview.xml內容如下:
Xml代碼
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http:
//schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<com.google.android.maps.MapView android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="0mHnPl2NS9XPKx6pKwJriV2Wj-mEHSh71yyX_SQ"
/>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http:
//schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<com.google.android.maps.MapView android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="0mHnPl2NS9XPKx6pKwJriV2Wj-mEHSh71yyX_SQ"
/>
</RelativeLayout>
注意:
A、使用此方法需在AndroidManifest.xml中加入相應的存取權限。
<uses-permission android:name="
android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="
android.permission.INTERNET" />;
B、你要申請一個自己的apiKey。