@stan_kocken EfficientAdapter use of RecyclerView much easier 

RecyclerView 

RecyclerView LayoutManager 

RecyclerView LayoutManager Adapter Dataset ViewHolder 

w er Adapter ViewHolder public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } @Override public int getItemCount() { return mDataset.length; } } https://developer.android.com/training/material/lists-cards.html 

Click listeners ? 

w er Adapter ViewHolder public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } @Override public int getItemCount() { return mDataset.length; } } https://developer.android.com/training/material/lists-cards.html 

Click listeners ? only on some items? 

w er Adapter ViewHolder public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } @Override public int getItemCount() { return mDataset.length; } } https://developer.android.com/training/material/lists-cards.html 

Click listeners ? only on some items? add an element ? 

w er Adapter ViewHolder public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } @Override public int getItemCount() { return mDataset.length; } } https://developer.android.com/training/material/lists-cards.html 

Click listeners ? only on some items? add an element ? Different layouts ? 

w er Adapter ViewHolder public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } @Override public int getItemCount() { return mDataset.length; } } https://developer.android.com/training/material/lists-cards.html 

Click listeners ? only on some items? add an element ? Different layouts ? One adapter like that per list ? 

EfficientAdapter 

w er Adapter ViewHolder EfficientAdapter EfficientViewHolder 

public class MyAdapter extends RecyclerView.Adapter { ... public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } ... @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } ... } Made in Google ViewHolder 

public class MyAdapter extends RecyclerView.Adapter { ... public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } ... @Override public void onBindViewHolder(ViewHolder holder, int position) { holder.mTextView.setText(mDataset[position]); } ... } public class MyViewHolder extends EfficientViewHolder { public MyViewHolder(View v) { super(v); } @Override protected void updateView(Context context, String object) { TextView textView = (TextView) getView(); textView.setText(object); } } Made in Google with EfficientAdapter ViewHolder 

public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; ... public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } ... @Override public int getItemCount() { return mDataset.length; } } recyclerView.setAdapter(new MyAdapter()); Made in Google Adapter 

public class MyAdapter extends RecyclerView.Adapter { private String[] mDataset; ... public MyAdapter(String[] myDataset) { mDataset = myDataset; } @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, parent, false); ViewHolder vh = new ViewHolder(v); return vh; } ... @Override public int getItemCount() { return mDataset.length; } } recyclerView.setAdapter(new MyAdapter()); Made in Google recyclerView.setAdapter( new EfficientRecyclerAdapter(R.layout.my_text_view, MyViewHolder.class, myDataset)); with EfficientAdapter Adapter 

Advanced topics ● access view into the layout 

public class MyViewHolder extends EfficientViewHolder { ... @Override protected void updateView(Context context, String object) { TextView textView = findViewByIdEfficient(R.id.my_textview); textView.setText(object); } } findViewByIdEfficient 

findViewByIdEfficient public class MyViewHolder extends EfficientViewHolder { ... @Override protected void updateView(Context context, String object) { TextView textView = findViewByIdEfficient(R.id.my_textview); textView.setText(object); } } auto-hold views 

findViewByIdEfficient public class MyViewHolder extends EfficientViewHolder { ... @Override protected void updateView(Context context, String object) { TextView textView = findViewByIdEfficient(R.id.my_textview); textView.setText(object); } } auto-cast 

Advanced topics ● add clicks listeners 

EfficientAdapter adapter = new EfficientRecyclerAdapter(...); adapter.setOnItemClickListener(this); adapter.setOnItemLongClickListener(this); add clicks listeners void onItemClick(EfficientAdapter parent, View view, String object, int position); void onLongItemClick(EfficientAdapter parent, View view, String object, int position); 

add clicks listeners - not everywhere public class MyViewHolder extends EfficientViewHolder { ... @Override public boolean isClickable() { return true; } @Override public boolean isLongClickable() { return false; } } 

Advanced topics ● add / remove elements 

add / remove elements adapter.add(“example1”); // add one object adapter.addAll(“example 2”, “example 3”); // add from an array adapter.addAll(list); // add from a collection adapter.remove(“example1”); // remove element adapter.removeAt(1); // remove element at position 1 adapter.move(1, 2); // invert element 1 and 2 Auto-animated 

Advanced topics ● different layout / item 

different layout / item EfficientAdapter adapter = new EfficientRecyclerAdapter(myDataset); 

different layout / item EfficientAdapter adapter = new EfficientRecyclerAdapter(myDataset) { @Override public int getItemViewType(int position) { return ? } }; 

different layout / item private static final int VIEW_TYPE_BOOK = 0; private static final int VIEW_TYPE_PLANE = 1; EfficientAdapter adapter = new EfficientRecyclerAdapter(myDataset) { @Override public int getItemViewType(int position) { return (get(position) instanceof Plane) ? VIEW_TYPE_PLANE : VIEW_TYPE_BOOK; } }; 

different layout / item private static final int VIEW_TYPE_BOOK = 0; private static final int VIEW_TYPE_PLANE = 1; EfficientAdapter adapter = new EfficientRecyclerAdapter(myDataset) { @Override public int getItemViewType(int position) { return (get(position) instanceof Plane) ? VIEW_TYPE_PLANE : VIEW_TYPE_BOOK; } @Override public Class getViewHolderClass(int viewType) { return ? } @Override public int getLayoutResId(int viewType) { return ? } }; 

different layout / item private static final int VIEW_TYPE_BOOK = 0; private static final int VIEW_TYPE_PLANE = 1; EfficientAdapter adapter = new EfficientRecyclerAdapter(myDataset) { @Override public int getItemViewType(int position) { return (get(position) instanceof Plane) ? VIEW_TYPE_PLANE : VIEW_TYPE_BOOK; } @Override public Class getViewHolderClass(int viewType) { return viewType == VIEW_TYPE_PLANE ? PlaneViewHolder.class : BookViewHolder.class; } @Override public int getLayoutResId(int viewType) { return viewType == VIEW_TYPE_PLANE ? R.layout.item_plane : R.layout.item_book; } }; 

ViewPager Also compatible with 

github.com/ StanKocken/EfficientAdapter ★268 Gradle: dependencies { compile 'com.skocken:efficientadapter:2.0' } @stan_kocken