Android Google Map

Android Google Map

1. Before using the android Google map API, you must check whether the Google map application is installed in the system. The detection method is as follows:

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. When detecting that the Google map application is not installed in the system, you can switch to Google map for web access, as shown below:

Intent it = new intent (intent. action_view, Uri. parse ("http://ditu.google.cn/maps? Hl = ZH & MRT = loc & Q = "+ weiduextra +", "+ jingduextra +"); startactivity (it); Note: use this method in androidmanifest. add the network access permission <uses-Permission Android: Name = "android. permission. internet "> </uses-Permission>

3. When the system detects that the Google map application has been installed, we can use the Google map API as follows:

1) Method 1:

Intent it = new intent (intent. action_view, Uri. parse ("Geo:" + weiduextra + "," + jingduextra); startactivity (it); Note: use this method in androidmanifest. <uses-Permission Android: Name = "android. permission. access_coarse_location "/> <uses-Permission Android: Name =" android. permission. internet "/>

2) Method 2:

You can create a subclass of mapactivity and display mapview on it. You can use mapcontroller to control the displayed coordinates, map mode, and field height, which is very easy to process.

Java code:

Public class maptest extends mapactivity {private 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*1 000000); // geographical coordinate MC. animateto (GP); MC. setzoom (12) ;}@ override protected Boolean isroutedisplayed () {return false ;}} public class maptest extends mapactivity {private mapview; private mapcontroller MC; @ overridepublic 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); // geographic coordinate MC. animateto (GP); MC. setzoom (12) ;}@ overrideprotected Boolean isroutedisplayed () {return false ;}} mapview. the XML content is as follows: XML Code <? 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>

Note:

A. to use this method, you must add the corresponding access permission to androidmanifest. xml.

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" />；

B. You need to apply for an apikey.