Android MVP：安全使用Presenter中的上下文

Cursor&gt ;. 片段(檢視)

public class ArticleCatalogFragment extends BaseFragment
implements ArticleCatalogPresenter.View,
LoaderManager.LoaderCallbacks<Cursor> {

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
return onCreateArticleCatalogLoader(args);
}

@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
data.registerContentObserver(new LoaderContentObserver(new Handler(), loader));
updateUI(data);
}

private Loader onCreateArticleCatalogLoader(Bundle args) {
int categoryId = args.getInt(CATEGORY_ID);
Loader loader = new ArticleCatalogLoader(this.getActivity(), categoryId);
return loader;
}

}

從MVP我需要：

主持人

public class ArticleCatalogPresenter extends BasePresenter
implements LoaderManager.LoaderCallbacks<Cursor> {

View view;

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
return onCreateArticleCatalogLoader(args);
}

@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
data.registerContentObserver(new LoaderContentObserver(new Handler(), loader));
view.updateUI(data);
}

private Loader onCreateArticleCatalogLoader(Bundle args) {
int categoryId = args.getInt(CATEGORY_ID);
Loader loader = new ArticleCatalogLoader(context, categoryId); // need Context
return loader;
}


interface View {
updateUI(Cursor data)
}

}

所以,我需要一個上下文在Presenter.

有一些細微差別：

主持人知道上下文 – 這是壞的,演講者不應該

瞭解Android.

在Presenter中擁有上下文可能導致記憶體洩漏.

我現在擔心如何避免記憶體洩漏等問題,以及如何最好地傳遞Presenter中的Context,使用Application Context或Activity / Fragment？

向Presenter新增上下文不是很好,因為演示者負責業務邏輯.要處理上下文,您需要具有片段/活動

在介面的幫助下使用回撥函式,這些介面將說明處理檢視時活動/片段需要執行的操作.

片段/活動負責提供上下文.

例：

interface BaseContract {
interface BaseView {
//Methods for View
void onDoSomething();
}

interface BasePresenter {
void doSomething();

}
}

class BaseMainPresenter implements BaseContract.BasePresenter {
BaseContract.BaseView view;

BaseMainPresenter(BaseContract.BaseView view) {
this.view = view;
}

@Override
public void doSomething() {
if (view != null)
view.onDoSomething();
}
}

class DemoClass implements BaseContract.BaseView {

//Create object of Presenter 

/****
* Example :
* BaseMainPresenter baseMainPresenter = new BaseMainPresenter(this);
*/
@Override
public void onDoSomething() {
//Deal with Context here.
}
}