Java tutorial
//package com.java2s; import android.content.Context; import android.content.pm.PackageManager; public class Main { public static boolean apkInstalled(Context context, String uri) { PackageManager pm = context.getPackageManager(); try { pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES); return true; } catch (PackageManager.NameNotFoundException e) { return false; } } }