BaseAcitivty

public abstract class BaseActivity extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getResId());
        initView(savedInstanceState);
        initData();
    }

    protected abstract void initData();

    protected abstract void initView(Bundle savedInstanceState);

    public abstract int getResId();

}
 

BaseFragment

public abstract class BaseFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(getResId(),container,false);
    }


    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        initView(view);
        initDate();
    }

    protected abstract void initDate();

    public abstract void initView(View view);

    protected abstract int getResId();
}
 

MyBaseAdapter

public abstract class MyBaseAdapter<T> extends BaseAdapter {

    private List<T> mDatas;
    protected Context mContext;

    public MyBaseAdapter(Context mContext) {
        this.mContext = mContext;
        mDatas = new ArrayList<>();
    }

    @Override
    public int getCount() {
        return mDatas.size();
    }

    public void setDatas(List<T> datas) {
        mDatas.clear();
        if(datas != null) {
            mDatas.addAll(datas);
        }
        notifyDataSetChanged();
    }

    public void addDatas(List<T> datas) {
        if(datas != null) {
            mDatas.addAll(datas);
            notifyDataSetChanged();
        }
    }

    @Override
    public T getItem(int position) {
        return mDatas.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
}