BaseAdapter封装优化

参照ArrayAdapter的源码，对BasAdapter进行封装。添加addAll（），remove（），clear（），sort（）等操作数据源的方法。

代码如下

public abstract class BaseAdapterWraper<D> extends BaseAdapter {  private List<D> mInfos = new ArrayList<>();  private final Object mLock = new Object();  protected LayoutInflater mInflater;  protected Context context;  private boolean mNotifyOnChange = true;  public BaseAdapterWraper(Context context) {    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);    this.context = context;  }  @Override  public void notifyDataSetChanged() {    super.notifyDataSetChanged();    mNotifyOnChange = true;  }  public void setNotifyOnChange(boolean notifyOnChange) {    mNotifyOnChange = notifyOnChange;  }  public Context getContext() {    return context;  }  public int getCount() {    return isEmpty() ? 0 : mInfos.size();  }  public D getItem(int position) {    return isEmpty() ? null : mInfos.get(position);  }  public long getItemId(int position) {    return position;  }  public abstract View getView(int position, View convertView, ViewGroup parent);  public void setDatas(@Nullable List<D> infos) {    mInfos = infos;    notifyDataSetChanged();  }  public List<D> getDatas() {    return mInfos;  }  public boolean isEmpty() {    return mInfos == null;  }  public void add(D t) {    synchronized (mLock) {      if (isEmpty()) {        return;      }      mInfos.add(t);    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void addAll(List<D> list) {    synchronized (mLock) {      if (isEmpty()) {        return;      }      if (list != null) {        mInfos.addAll(list);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void clear() {    if (isEmpty()) {      return;    }    synchronized (mLock) {      mInfos.clear();    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void remove(D t){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        mInfos.remove(t);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void insert(D t, int index){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        mInfos.add(index,t);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void sort(Comparator<? super D> comparator){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        Collections.sort(mInfos, comparator);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void hideLastPositionView(int position, View v) {    v.setVisibility(position == getCount() - 1 ? View.GONE : View.VISIBLE);  }  public void lastPositionDividerFull(int position, View v, int margin) {    LayoutParams params =        new LayoutParams(LayoutParams.MATCH_PARENT, DensityUtil.dip2px(context, 0.6f));    if (position == getCount() - 1) {      params.setMargins(0, 0, 0, 0);    } else {      params.setMargins(margin, 0, 0, 0);    }    v.setLayoutParams(params);  }  @SuppressWarnings("unchecked")  protected static <T extends View> T findViewById(View view, int id) {    return (T) view.findViewById(id);  }}

ArrayAdapter源码如下

public abstract class BaseAdapterWraper<D> extends BaseAdapter {  private List<D> mInfos = new ArrayList<>();  private final Object mLock = new Object();  protected LayoutInflater mInflater;  protected Context context;  private boolean mNotifyOnChange = true;  public BaseAdapterWraper(Context context) {    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);    this.context = context;  }  @Override  public void notifyDataSetChanged() {    super.notifyDataSetChanged();    mNotifyOnChange = true;  }  public void setNotifyOnChange(boolean notifyOnChange) {    mNotifyOnChange = notifyOnChange;  }  public Context getContext() {    return context;  }  public int getCount() {    return isEmpty() ? 0 : mInfos.size();  }  public D getItem(int position) {    return isEmpty() ? null : mInfos.get(position);  }  public long getItemId(int position) {    return position;  }  public abstract View getView(int position, View convertView, ViewGroup parent);  public void setDatas(@Nullable List<D> infos) {    mInfos = infos;    notifyDataSetChanged();  }  public List<D> getDatas() {    return mInfos;  }  public boolean isEmpty() {    return mInfos == null;  }  public void add(D t) {    synchronized (mLock) {      if (isEmpty()) {        return;      }      mInfos.add(t);    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void addAll(List<D> list) {    synchronized (mLock) {      if (isEmpty()) {        return;      }      if (list != null) {        mInfos.addAll(list);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void clear() {    if (isEmpty()) {      return;    }    synchronized (mLock) {      mInfos.clear();    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void remove(D t){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        mInfos.remove(t);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void insert(D t, int index){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        mInfos.add(index,t);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void sort(Comparator<? super D> comparator){    synchronized (mLock){      if(isEmpty()){        return;      }      if(mInfos != null){        Collections.sort(mInfos, comparator);      }    }    if (mNotifyOnChange) notifyDataSetChanged();  }  public void hideLastPositionView(int position, View v) {    v.setVisibility(position == getCount() - 1 ? View.GONE : View.VISIBLE);  }  public void lastPositionDividerFull(int position, View v, int margin) {    LayoutParams params =        new LayoutParams(LayoutParams.MATCH_PARENT, DensityUtil.dip2px(context, 0.6f));    if (position == getCount() - 1) {      params.setMargins(0, 0, 0, 0);    } else {      params.setMargins(margin, 0, 0, 0);    }    v.setLayoutParams(params);  }  @SuppressWarnings("unchecked")  protected static <T extends View> T findViewById(View view, int id) {    return (T) view.findViewById(id);  }}

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