[FIXED] How to check Whatsapp is installed in device in android?

Issue

I want to check that whether whatsapp is installed in mobile or not if installed then show toast "installed" and if not installed then show Toast "Not Installed".How can I do that Kindly help.

Solution

You can use this code. It will check if package is installed.

public class Example extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //Put the package name here...
        if(isAppInstalled("com.whatsapp")) {
            System.out.println("App is already installed on your phone");         
        } else {
            System.out.println("App is not currently installed on your phone");
        }
    }

    private boolean isAppInstalled(String packageName) {
        try {
            getPackageManager().getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
            return true;
        }
        catch (PackageManager.NameNotFoundException ignored) {
            return false;
        }
    }
}

Answered By - Eliasz Kubala
Answer Checked By - Senaida (JavaFixing Volunteer)