cannot resolve RecyclerView Adapter

Question

I'm following this tutorial and I need to add recycleview. But Android Studio cannot resolve RecyclerView. I added dependency to the gradle file as well. And I tried to add library to lib folder as stated here . But nothing works.

compile 'com.android.support:recyclerview-v7:23.2.0'

Here is the gradle code part.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.2.0'
    compile 'com.android.support:design:23.2.0'
    compile 'com.android.support:recyclerview-v7:23.2.0'

}

It fails in this line.

RecyclerView.Adapter recyclerViewAdapter; 

recyclerViewAdapter = new RecyclerViewAdapter(navTitles,navIcons,this);
recyclerView.setAdapter(recyclerViewAdapter); 

Answer 1

您只需在教程中进一步阅读，其中包含RecyclerViewAdapter类（扩展RecyclerView.Adapter ）的定义。