How to know if a particular application is installed or not on the device?

Question

I want to check whether an app is installed on the device or not. I am using code below :

PackageManager pm = context.getPackageManager();
        List

        

Answer 1

I found the answer here

Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List pkgAppsList = 
context.getPackageManager().queryIntentActivities( mainIntent, 0);
for (ResolveInfo resolveInfo : pkgAppsList) {
            Log.d(TAG, "__<>"+resolveInfo.activityInfo.packageName);
            if (resolveInfo.activityInfo.packageName != null 
                    && resolveInfo.activityInfo.packageName.equals(uri)) {
              return true;
          }
        }
        return false;

This worked for me perfectly.