Java tutorial
//package com.java2s; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; public class Main { public static void launchApp(Context context, String packageName) { PackageManager packageManager = context.getPackageManager(); Intent intent = packageManager.getLaunchIntentForPackage(packageName); if (intent != null) { context.startActivity(intent); } } }