我正在制作一个Android启动器,作为自己制作Android应用程序的入门,并且我的设计需要我知道用户设备上安装了多少应用程序,并且最好只计算可以启动的普通应用程序。 我希望将这些应用程序数量存储在全局整数变量中。 只考虑这个目标,最简单的方式是什么,以便将此数字检索为该变量?
PackageManager
的getInstalledApplications()
方法。List
。如果设置了标志GET_UNINSTALLED_PACKAGES
,将返回所有应用程序的列表,包括那些使用DONT_DELETE_DATA
(带数据目录的部分安装应用程序)删除的应用程序。int numberOfInstalledApps = getPackageManager(0).getInstalledApplications().size();
int numberOfNonSystemApps = 0;
List<ApplicationInfo> appList = getPackageManager().getInstalledApplications(0);
for(ApplicationInfo info : appList) {
if((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
numberOfNonSystemApps++;
}
}
PackageManager pm = getPackageManager();
int nonSysAppsCount=0;
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
for(ApplicationInfo packageInfo:packages){
if( pm.getLaunchIntentForPackage(packageInfo.packageName) != null ){
String currAppName = pm.getApplicationLabel(packageInfo).toString();
nonSysAppsCount++;
//This app is a non-system app
}
else{
//System App
}
}
public static ArrayList<String> getInstalledApps() {
ArrayList<String> appList = new ArrayList<>();
List<PackageInfo> packList = getPackageManager().getInstalledPackages(0);
for (int i=0; i < packList.size(); i++) {
PackageInfo packInfo = packList.get(i);
if ( (packInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
String appName = packInfo.applicationInfo.loadLabel(getPackageManager()).toString();
appList.add(appName);
Log.e("App >" + Integer.toString(i), appName);
}
}
return appList;
}
int number = getInstalledApps().size();
Intent myIntent = new Intent(Intent.ACTION_MAIN, null);
myIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List appsList = context.getPackageManager().queryIntentActivities(myIntent, 0);