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

Use Below Code:

public boolean isAppInstalled(String package_name, String app_name)
{
    try {
        PackageManager pm = getPackageManager();
        PackageInfo info = pm.getPackageInfo("" + package_name, PackageManager.GET_META_DATA);
        return true;

    }
    catch (PackageManager.NameNotFoundException e) {
        Toast.makeText(getApplicationContext(), "Your device has not installed " + app_name, Toast.LENGTH_SHORT)
                .show();
        return false;
    }
}

Call the method like:

isAppInstalled("com.whatsapp", "Whatsapp"); // it will return true if your device is having whatsApp.

isAppInstalled("com.randomname", "anyname"); //it will return false