Android 萬能RecycleView 的Adapter

public abstract class CommonAdapter<T> extends RecyclerView.Adapter<CommonAdapter.MyViewHolder>
{
    private Context mContext;
    private int mLayoutId;
    private List<T> mDatas;
    private LayoutInflater mInflater;


    public CommonAdapter(Context context, int layoutId, List<T> datas){
        mContext = context;
        mInflater = LayoutInflater.from(context);
        mLayoutId = layoutId;
        mDatas = datas;
    }


    @Override
    public MyViewHolder onCreateViewHolder(final ViewGroup parent, int viewType) {
        View view = mInflater.inflate(mLayoutId,parent,false);
        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        if(position < mDatas.size()){
            convert(holder, mDatas.get(position), position);
        }
    }

    @Override
    public int getItemCount() {
        return mDatas ==null? 0:mDatas.size();
    }

    public static class MyViewHolder extends RecyclerView.ViewHolder {
        private SparseArray<View> mViews;
        private View mConvertview;

        public View getConverView(){
            return mConvertview;
        }

        private MyViewHolder(View itemView) {
            super(itemView);
            mConvertview = itemView;
            mViews = new SparseArray<View>();
        }

        public <V extends View>V getViewById(int viewId){
            View view = mViews.get(viewId);
            if(view == null){
                view = mConvertview.findViewById(viewId);
                mViews.put(viewId, view);
            }
            return (V)view;
        }
    }

    /**
     *
     * @param holder holder.getViewById
     * @param dataBean return DataBean
     * @param position posittion
     */
    public abstract void convert(MyViewHolder holder, T dataBean, int position);

}

activity

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    /**
     * Button
     */
    private Button mButton;
    private RecyclerView mRecycleView;
    private Toolbar mToolBar;
    private CommonAdapter<String> adapter;
    private FloatingActionButton mFab;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        if (Build.VERSION.SDK_INT >= 21) {
            View decorView = getWindow().getDecorView();
            int option = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
            decorView.setSystemUiVisibility(option);
            getWindow().setNavigationBarColor(Color.TRANSPARENT);
            getWindow().setStatusBarColor(Color.TRANSPARENT);
        }
        afterInitView();
    }

    private void initView() {
//        mButton.setOnClickListener(this);
        mRecycleView = (RecyclerView) findViewById(R.id.list_view);
        mToolBar = (Toolbar) findViewById(R.id.tool_bar);
        mFab = (FloatingActionButton) findViewById(R.id.fab);
        mFab.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
//            case R.id.button:
//                Small.openUri("detail", this);
//                break;
            case R.id.fab:
                startActivity(new Intent(this, Test3Activity.class));
                break;
        }
    }

    private void afterInitView() {
        setSupportActionBar(mToolBar);
        ArrayList<String> list = new ArrayList<>();
        for (int i = 0; i < 30; i++) {
            list.add("hello " + i);
        }
        adapter = new CommonAdapter<String>(this, android.R.layout.activity_list_item, list) {
            @Override
            public void convert(MyViewHolder holder, String dataBean, int position) {
                TextView textView = holder.getViewById(android.R.id.text1);
                textView.setText("hello " + position);
            }
        };
        mRecycleView.setLayoutManager(new LinearLayoutManager(this));
        mRecycleView.setAdapter(adapter);
    }


}