Error 'No resource identifier found' with Android sample project

Question

I am trying to open the Android sample project - Navigation Drawer in Android Studio, but got error while building it.

These are the steps to reproduce it:

Answer 1

The compiler cannot find this attribute in the activity_navigation_drawer.xml:

app:layoutManager="LinearLayoutManager"

To fix this

1. Remove this attribute from the XML so your Recyclerview looks like this:

2. press the Gradle Sync button

3. In NavigationDrawerActivity, add the following 2 lines of code in your OnCreate();

   LinearLayoutManager mLinearLayoutmanager = new LinearLayoutManager(this);
   mDrawerList.setLayoutManager(mLinearLayoutmanager);
   

So your code now looks like this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_navigation_drawer);

    mTitle = mDrawerTitle = getTitle();
    mPlanetTitles = getResources().getStringArray(R.array.planets_array);
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (RecyclerView) findViewById(R.id.left_drawer);

    LinearLayoutManager mLinearLayoutmanager = new LinearLayoutManager(this);
    mDrawerList.setLayoutManager(mLinearLayoutmanager);
    ....

Good luck

Edit: The reason why this the original xml code is no longer working, is most likely that the xmlns:app="http://schemas.android.com/apk/res-auto" namespace is no longer supporting the layoutManager attribute.

More info on the namespace can be found here: https://stackoverflow.com/a/26692768/3708094