BaseFragment base class

package com.test.mvp.mvpdemo.mvp.v6.basemvp;

import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.annotation.LayoutRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.test.mvp.mvpdemo.mvp.v6.inject.InjectPresenter;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

public abstract class BaseFragment extends Fragment implements IBaseView {

private List<BasePresenter> mInjectPresenters;

private View mLayoutView;

protected abstract @LayoutRes int setLayout();

protected abstract void initViews(@Nullable Bundle savedInstanceState);

protected abstract void initData();

@SuppressWarnings("ConstantConditions")
protected <T extends View> T $(@IdRes int viewId) {
return this.getView().findViewById(viewId);
}

@SuppressWarnings({"unchecked", "TryWithIdenticalCatches"})
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(setLayout(), container, false);

mInjectPresenters = new ArrayList<>();

//获得已经申明的变量，包括私有的
Field[] fields = this.getClass().getDeclaredFields();
for (Field field : fields) {
//获取变量上面的注解类型
InjectPresenter injectPresenter = field.getAnnotation(InjectPresenter.class);
if (injectPresenter != null) {
try {
Class<? extends BasePresenter> type = (Class<? extends BasePresenter>) field.getType();
BasePresenter mInjectPresenter = type.newInstance();
//绑定
mInjectPresenter.attach(this);
field.setAccessible(true);
field.set(this, mInjectPresenter);
mInjectPresenters.add(mInjectPresenter);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (java.lang.InstantiationException e) {
e.printStackTrace();
} catch (ClassCastException e) {
e.printStackTrace();
throw new RuntimeException("SubClass must extends Class:BasePresenter");
}
}
}
return view;
}

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

initViews(savedInstanceState);
initData();
}

@Override
public void onDestroy() {
super.onDestroy();
for (BasePresenter presenter : mInjectPresenters) {
presenter.detach();
}
mInjectPresenters.clear();
mInjectPresenters = null;
}
}
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