Android开发中recyclerview组件的认识

public class MyActivity extends Activity { 
  private RecyclerView mRecyclerView; 
  private RecyclerView.Adapter mAdapter; 
  private RecyclerView.LayoutManager mLayoutManager; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.my_activity); 
    mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view); 
 
    // improve performance if you know that changes in content 
    // do not change the size of the RecyclerView 
    mRecyclerView.setHasFixedSize(true); 
 
    // use a linear layout manager 
    mLayoutManager = new LinearLayoutManager(this); 
    mRecyclerView.setLayoutManager(mLayoutManager); 
 
    // specify an adapter (see also next example) 
    mAdapter = new MyAdapter(myDataset); 
    mRecyclerView.setAdapter(mAdapter); 
  } 
  ... 
} 

public class MyAdapter extends RecyclerView.Adapter { 
  private String[] mDataset; 
 
  // Provide a reference to the type of views that you are using 
  // (custom viewholder) 
  public static class ViewHolder extends RecyclerView.ViewHolder { 
    public TextView mTextView; 
    public ViewHolder(TextView v) { 
      super(v); 
      mTextView = v; 
    } 
  } 
 
  // Provide a suitable constructor (depends on the kind of dataset) 
  public MyAdapter(String[] myDataset) { 
    mDataset = myDataset; 
  } 
 
  // Create new views (invoked by the layout manager) 
  @Override 
  public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, 
                          int viewType) { 
    // create a new view 
    View v = LayoutInflater.from(parent.getContext()) 
                .inflate(R.layout.my_text_view, parent, false); 
    // set the view's size, margins, paddings and layout parameters 
    ... 
    ViewHolder vh = new ViewHolder(v); 
    return vh; 
  } 
 
  // Replace the contents of a view (invoked by the layout manager) 
  @Override 
  public void onBindViewHolder(ViewHolder holder, int position) { 
    // - get element from your dataset at this position 
    // - replace the contents of the view with that element 
    holder.mTextView.setText(mDataset[position]); 
 
  } 
 
  // Return the size of your dataset (invoked by the layout manager) 
  @Override 
  public int getItemCount() { 
    return mDataset.length; 
  } 
}