Android to determine if the app is installed, not installed to download the installation from the store

 Public Static Booleanisavilible (Context context, String PackageName) {FinalPackagemanager Packagemanager = Context.getpackagemanager ();//Get Packagemanagerlist< packageinfo> pinfo = packagemanager.getinstalledpackages (0);//Get package information for all installed programsList<string> PName =NewArraylist<string> ();//the package name used to store all installed programs//Remove the package name from pinfo and press it into the PName list            if(pinfo! =NULL){              for(inti = 0; I < pinfo.size (); i++) {String pn=Pinfo.get (i). PackageName;             Pname.add (PN); }         }         returnPname.contains (PackageName);//determine if there is a package name for the target program in PName, there is true, no false}

if(Baidutool.isavilible (setting_activity. This. Getapplicationcontext (), "Com.baidu.BaiduMap")){                 Try{Intent= Intent.getintent ("INTENT://MAP/DIRECTION?ORIGIN=LATLNG:" +baidutool.getinstance (). Getlocationx () + "," + Baidutool.getinstance (). Getlocationy () + "|name: My location &destination= &mode=transit&region= Qingdao &src= Mobile Medical Care #intent;scheme=bdapp;package=com.baidu.baidumap;end "); } Catch(URISyntaxException e) {toastutils.show (Getapplicationcontext (),"Call Baidu Map failed."); LOG.I ("Baidutoolisavilible", "Not Installed");                } startactivity (Intent); }             //not installed, jump to market download the program            Else {                 //Baidu Map is not installed, jump to the App store.Toastutils.show (Getapplicationcontext (), "Baidu maps not installed, jump App Store."); Uri URI= Uri.parse ("Market://details?id=com.baidu.baidumap");//ID is the package nameIntent it =NewIntent (Intent.action_view, URI);             StartActivity (IT); }            //mobile app to tune up Android Baidu map Way Example

Android to determine if the app is installed, not installed to download the installation from the store