Android First App Tutorial Issue

I've been trying to get this to work, even copying and pasting the code exactly as the tutorial says it, but it doesn't seem to work. I know the issue is in MainActivity or Display

Solution 1:

I had the same problem yesterday (: You need to add to your imports in DisplayMessageActivity

import android.annotation.SuppressLint;
import android.support.v4.app.NavUtils;

Also, you need to add to your build.gradle file in dependencies section:

compile'com.android.support:support-v4:18.0.+'

About Support Libraries you can red here.

Solution 2:

I don't see the imports for SuppressLint in your DisplayMessageActivity class. Add the correct imports.

Also not that SuppressLint annotation was added in API level 16. Make sure that you are using build SDK to 16 or higher.

Solution 3:

The last part of your issue is that you don't have 'package com.example.firstapp;' at the top of DisplayMessageActivity.java.

Solution 4:

As for the Android first app documentiaont they have clearly mentioned as below. The Note near the ***

Build an Intent topic , Step 1

---

Note: The reference to DisplayMessageActivity will raise an error if you’re using an IDE such as Android Studio because the class doesn’t exist yet. Ignore the error for now; you’ll create the class soon.

Therefore, if you scroll down more in the documentation you can find the topic Create the Second Activity that create the new DisplayMessageActivity.

Android First App Tutorial By Google

Solution 5:

Add this to your activity_display_message.xml

android:id="@+id/activity_display_message">