FacebookDialog.MessageDialogBuilder builder = new FacebookDialog.MessageDialogBuilder(getActivity()) .setLink("https://developers.facebook.com/docs/android/share/") .setName("Message Dialog Tutorial") .setCaption("Build great social apps that engage your friends.") .setPicture("http://i.imgur.com/g3Qc1HN.png") .setDescription("Allow your users to message links from your app using the Android SDK.") .setFragment(this); // If the Facebook app is installed and we can present the share dialog if (builder.canPresent()) { // Enable button or other UI to initiate launch of the Message Dialog FacebookDialog dialog = builder.build(); dialog.present(); } else { // Disable button or other UI for Message Dialog Log.e("===Error===","Error!No Message!");//出現此log說明未安裝Messager }