How to show details for installed application on Android?

Android-App details

  Intent intent;

    if (android.os.Build.VERSION.SDK_INT >= 9) {
        /* on 2.3 and newer, use APPLICATION_DETAILS_SETTINGS with proper URI */
        Uri packageURI = Uri.parse("package:" + pkgName);
        intent = new Intent("android.settings.APPLICATION_DETAILS_SETTINGS", packageURI);
        ctx.startActivity(intent);
    }  else  {
        /* on older Androids, use trick to show app details */
        intent = new Intent(Intent.ACTION_VIEW); 
        intent.setClassName("com.android.settings", "com.android.settings.InstalledAppDetails"); 
        intent.putExtra("com.android.settings.ApplicationPkgName", pkgName); 
        intent.putExtra("pkg", pkgName); 
        ctx.startActivity(intent);          
    }