Fragment预防预加载

最新推荐文章于 2021-06-09 16:47:32 发布

原创最新推荐文章于 2021-06-09 16:47:32 发布 · 765 阅读

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#android

本文介绍了一个公共的BaseFragment抽象类实现，该类用于简化Fragment的生命周期管理，并提供与Presenter和Model交互的基础结构。BaseFragment实现了Fragment的常用逻辑，如视图初始化、数据加载等，以减少子类中的重复代码。

public abstract class BaseFragment<P extends BasePresenter,M extends BaseModel> extends Fragment {
    /**
     * 视图是否已经初初始化
     */
    public Activity mActivity;
    public P mPresenter;
    public M mModel;
    private Unbinder bind;
    public boolean isViewInited = false;
    public boolean isVisibleToUser = false;
    @Override
    public void onAttach(Context context) {
        mActivity = (Activity) context;
        super.onAttach(context);
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View inflate = inflater.inflate(getFragmentLayoutId(), container, false);
        bind = ButterKnife.bind(this, inflate);
        init();
        isViewInited = true;
        if (isViewInited && isVisibleToUser)
            initData();
        return inflate;
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        this.isVisibleToUser = isVisibleToUser;
        Log.e("TAG",isVisibleToUser+"--"+this.getClass().getName());
        if(isVisibleToUser&&isViewInited){
            initData();
        }
    }

    @Override
    public void onDestroy() {
        bind.unbind();
        mActivity = null;
        super.onDestroy();
    }
    private void init() {
        mPresenter = TUtils.getT(this, 0);
        mModel = TUtils.getT(this, 1);
        if (this instanceof BaseView) {
            mPresenter.setMv(mModel, this);
        }
        initView();
    }
    protected abstract void initView();
    protected abstract void initData();
    public abstract int getFragmentLayoutId();

}