android 遍历安装过的包名

pageManage = getPackageManager();
List<PackageInfo> packages = pageManage.getInstalledPackages(0); 
for(int i=0;i<packages.size();i++) { 
PackageInfo packageInfo = packages.get(i); 
String appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
String pagName = packageInfo.packageName;
if(pagName.equals("com.cric.mobile.manager")){
image.setBackgroundDrawable(packageInfo.applicationInfo.loadIcon(pageManage));
Intent intent = pageManage.getLaunchIntentForPackage("com.cric.mobile.manager");
startActivity(intent);