/* * Copyright 2017 Google Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.example.networksecurity; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.design.widget.CoordinatorLayout; import android.support.design.widget.Snackbar; import android.support.v4.app.Fragment; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ProgressBar; import com.example.networksecurity.model.Post; import com.example.networksecurity.ui.PostAdapter; public class MainFragment extends Fragment implements MainContract.View { private static final String TAG = MainFragment.class.getSimpleName(); private MainContract.Presenter mPresenter; private ProgressBar mProgressBar; private CoordinatorLayout mLayout; private RecyclerView mPostList; private PostAdapter mPostAdapter; private View mEmptyView; private Snackbar mErrorSnackbar; public MainFragment() { // Required empty public constructor } public static MainFragment newInstance() { return new MainFragment(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { PostAdapter.PostAdapterCallback mPostLoadingListener = new PostAdapter.PostAdapterCallback() { @Override public void onPostImageLoadingError(String error, Exception e) { mPresenter.onLoadPostImageError(error, e); } }; mPostAdapter = new PostAdapter(getContext(), mPostLoadingListener); // Inflate the layout for this fragment View layout = inflater.inflate(R.layout.fragment_main, container, false); mProgressBar = (ProgressBar) layout.findViewById(R.id.progressBar); mLayout = (CoordinatorLayout) layout.findViewById(R.id.layout_coordinator); mPostList = (RecyclerView) layout.findViewById(R.id.post_list); mEmptyView = layout.findViewById(R.id.empty_view); LinearLayoutManager layoutManager = new LinearLayoutManager(getContext()); layoutManager.setOrientation(LinearLayoutManager.VERTICAL); mPostList.setLayoutManager(layoutManager); mPostList.setAdapter(mPostAdapter); layout.findViewById(R.id.load_posts).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onLoadPostsClick(); } }); return layout; } @Override public void onResume() { super.onResume(); mPresenter.start(); } private void onLoadPostsClick() { if (mPresenter == null) { return; } mPresenter.loadPosts(); } @Override public void setPresenter(MainContract.Presenter presenter) { mPresenter = presenter; } @Override public void setLoadingPosts(boolean isLoading) { mProgressBar.setVisibility(isLoading ? View.VISIBLE : View.GONE); } @Override public void setPosts(Post[] posts) { mPostAdapter.setPosts(posts); if (posts == null || posts.length < 1) { mPostList.setVisibility(View.GONE); } else { mPostList.setVisibility(View.VISIBLE); } } @Override public void showError(@NonNull String title, String error) { Log.e(TAG, error != null ? error : title); mErrorSnackbar = Snackbar.make(mLayout, title, Snackbar.LENGTH_INDEFINITE); mErrorSnackbar.show(); } @Override public void hideError() { if (mErrorSnackbar != null) { mErrorSnackbar.dismiss(); } } @Override public void showNoPostsMessage(boolean showMessage) { mEmptyView.setVisibility(showMessage ? View.VISIBLE : View.GONE); } }