Java tutorial
//package com.java2s; import android.content.Context; import android.content.pm.PackageManager; public class Main { public static boolean isGooglePayInstalled(Context context) { return isAppInstalled(context, "com.android.vending"); } public static boolean isAppInstalled(Context context, String packageName) { try { context.getPackageManager().getApplicationInfo(packageName, 0); return true; } catch (PackageManager.NameNotFoundException e) { return false; } } }