下面是获取Android上安装的活动/应用程序列表的代码:

Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> pkgAppsList = context.getPackageManager().queryIntentActivities( mainIntent, 0);

您将在ResolveInfo中获得启动应用程序所需的所有数据。你可以在这里检查ResolveInfo javadoc。

干净的解决方案，过滤成功的系统应用程序

这个解决方案背后的思想是，每个系统应用程序的主活动都没有一个自定义的活动图标。这个方法给了我一个很好的结果:

 public static Set<PackageInfo> getInstalledApps(Context ctx) {
    final PackageManager packageManager = ctx.getPackageManager();

    final List<PackageInfo> allInstalledPackages = packageManager.getInstalledPackages(PackageManager.GET_META_DATA);
    final Set<PackageInfo> filteredPackages = new HashSet();

    Drawable defaultActivityIcon = packageManager.getDefaultActivityIcon();

    for(PackageInfo each : allInstalledPackages) {
        if(ctx.getPackageName().equals(each.packageName)) {
            continue;  // skip own app
        }

        try {
            // add only apps with application icon
            Intent intentOfStartActivity = packageManager.getLaunchIntentForPackage(each.packageName);
            if(intentOfStartActivity == null)
                continue;

            Drawable applicationIcon = packageManager.getActivityIcon(intentOfStartActivity);
            if(applicationIcon != null && !defaultActivityIcon.equals(applicationIcon)) {
                filteredPackages.add(each);
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.i("MyTag", "Unknown package name " + each.packageName);
        }
    }

    return filteredPackages;
}

下面是获取Android上安装的活动/应用程序列表的代码:

Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> pkgAppsList = context.getPackageManager().queryIntentActivities( mainIntent, 0);

您将在ResolveInfo中获得启动应用程序所需的所有数据。你可以在这里检查ResolveInfo javadoc。

我有另一个解决方案:

ArrayList<AppInfo> myAppsToUpdate;

    // How to get the system and the user apps.
    public ArrayList<AppInfo> getAppsToUpdate() {

        PackageManager pm = App.getContext().getPackageManager();
        List<ApplicationInfo> installedApps = pm.getInstalledApplications(0);
        myAppsToUpdate = new ArrayList<AppInfo>();
        for (ApplicationInfo aInfo : installedApps) {

            if ((aInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
                // System apps 
            } else {
                // Users apps
                AppInfo appInfo = new AppInfo();
                appInfo.setAppName(aInfo.loadLabel(pm).toString());
                appInfo.setPackageName(aInfo.packageName);
                appInfo.setLaunchActivity(pm.getLaunchIntentForPackage(aInfo.packageName).toString());
                try {
                    PackageInfo info = pm.getPackageInfo(aInfo.packageName, 0);
                    appInfo.setVersionName(info.versionName.toString());
                    appInfo.setVersionCode("" + info.versionCode);
                    myAppsToUpdate.add(appInfo);
                } catch (NameNotFoundException e) {
                    Log.e("ERROR", "we could not get the user's apps");
                }

            }
        }
        return myAppsToUpdate;
    }

下面是使用PackageManager的一种更简洁的方式

final PackageManager pm = getPackageManager();
//get a list of installed apps.
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);

for (ApplicationInfo packageInfo : packages) {
    Log.d(TAG, "Installed package :" + packageInfo.packageName);
    Log.d(TAG, "Source dir : " + packageInfo.sourceDir);
    Log.d(TAG, "Launch Activity :" + pm.getLaunchIntentForPackage(packageInfo.packageName)); 
}
// the getLaunchIntentForPackage returns an intent that you can use with startActivity() 

更多信息请点击这里http://qtcstation.com/2011/02/how-to-launch-another-app-from-your-app/

public static List<ApplicationInfo> getApplications(Context context) {
    return context.getPackageManager().getInstalledApplications(PackageManager.GET_META_DATA);
}