Java tutorial
/* * Copyright (C) 2016 SamuelGjk <samuel.alva@outlook.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package moe.yukinoneko.gcomic.module.gallery; import android.content.Intent; import android.os.Build; import android.os.Handler; import android.support.design.widget.CoordinatorLayout; import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPropertyAnimatorListenerAdapter; import android.support.v7.widget.AppCompatSeekBar; import android.support.v7.widget.AppCompatTextView; import android.view.View; import android.widget.LinearLayout; import android.widget.SeekBar; import com.liulishuo.filedownloader.util.FileDownloadUtils; import java.util.List; import butterknife.BindView; import butterknife.OnClick; import moe.yukinoneko.gcomic.R; import moe.yukinoneko.gcomic.base.ToolBarActivity; import moe.yukinoneko.gcomic.data.ComicData; import moe.yukinoneko.gcomic.download.DownloadTasksManager; import moe.yukinoneko.gcomic.network.GComicApi; import moe.yukinoneko.gcomic.utils.SnackbarUtils; import moe.yukinoneko.gcomic.utils.Utils; import moe.yukinoneko.gcomic.widget.HackyViewPager; /** * Created by SamuelGjk on 2016/4/20. */ public class GalleryActivity extends ToolBarActivity<GalleryPresenter> implements IGalleryView { private final String TAG = "GalleryActivity"; public static final String GALLERY_CMOIC_ID = "GALLERY_CMOIC_ID"; public static final String GALLERY_CMOIC_FIRST_LETTER = "GALLERY_CMOIC_FIRST_LETTER"; public static final String GALLERY_CHAPTER_LIST = "GALLERY_CHAPTER_LIST"; public static final String GALLERY_CHAPTER_POSITION = "GALLERY_CHAPTER_POSITION"; public static final String GALLERY_BROWSE_POSITION = "GALLERY_BROWSE_POSITION"; @BindView(R.id.gallery_pager) HackyViewPager galleryPager; @BindView(R.id.bottom_bar) LinearLayout bottomBar; @BindView(R.id.seek_bar) AppCompatSeekBar seekBar; @BindView(R.id.cur_page) AppCompatTextView curPage; @BindView(R.id.total_pages) AppCompatTextView totalPages; @BindView(R.id.load_error_layout) LinearLayout loadErrorLayout; @BindView(R.id.load_error_tips) AppCompatTextView loadErrorTips; private View mDecorView; private GalleryPagerAdapter mPagerAdapter; private int mComicId; private String firstLetter; private List<ComicData.ChaptersBean.ChapterBean> mChapters; private int mCurChapterPosition; private int mLastChapterPosition; private int mHistoryBrowsePosition; private int intCurPage; private Handler mHandler; private Runnable mPreviousRunnable, mNextRunnable; private boolean useHistory = true; private final int NOT_FULL_SCREEN_FLAG = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; private final int FULL_SCREEN_FLAG = NOT_FULL_SCREEN_FLAG | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY; @OnClick(R.id.load_error_layout) void onClick(View v) { switch (v.getId()) { case R.id.load_error_layout: loadErrorLayout.setVisibility(View.INVISIBLE); fetchChapterContent(mChapters.get(mCurChapterPosition).chapterId); break; default: break; } } @Override protected int provideContentViewId() { return R.layout.activity_gallery; } @Override protected void initPresenter() { presenter = new GalleryPresenter(this, this); presenter.init(); } @Override public void init() { mDecorView = getWindow().getDecorView(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) bottomBar.getLayoutParams(); lp.setMargins(0, 0, 0, Utils.getNavigationBarHeight(this)); } mHandler = new Handler(); mPreviousRunnable = new Runnable() { @Override public void run() { if (mCurChapterPosition < mChapters.size() - 1) { mLastChapterPosition = mCurChapterPosition; mCurChapterPosition += 1; fetchChapterContent(mChapters.get(mCurChapterPosition).chapterId); } else { galleryPager.setCurrentItem(1); galleryPager.setLocked(false); seekBar.setEnabled(true); showMessageSnackbar(R.string.already_first); } } }; mNextRunnable = new Runnable() { @Override public void run() { if (mCurChapterPosition > 0) { mLastChapterPosition = mCurChapterPosition; mCurChapterPosition -= 1; fetchChapterContent(mChapters.get(mCurChapterPosition).chapterId); } else { galleryPager.setCurrentItem(mPagerAdapter.getCount() - 2); galleryPager.setLocked(false); seekBar.setEnabled(true); showMessageSnackbar(R.string.already_last); } } }; galleryPager.setLocked(true); galleryPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { seekBar.setProgress(position - 1); intCurPage = position; if (intCurPage > mPagerAdapter.getCount() - 2) { intCurPage = mPagerAdapter.getCount() - 2; } else if (intCurPage < 1) { intCurPage = 1; } curPage.setText(String.valueOf(intCurPage)); if (position == 0) { galleryPager.setLocked(true); seekBar.setEnabled(false); mHandler.postDelayed(mPreviousRunnable, 1000); } else if (position == mPagerAdapter.getCount() - 1) { galleryPager.setLocked(true); seekBar.setEnabled(false); mHandler.postDelayed(mNextRunnable, 1000); } } @Override public void onPageScrollStateChanged(int state) { } }); mPagerAdapter = new GalleryPagerAdapter(getSupportFragmentManager()); galleryPager.setAdapter(mPagerAdapter); seekBar.setEnabled(false); seekBar.setKeyProgressIncrement(1); seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { int progress = 0; @Override public void onProgressChanged(SeekBar seekBar, int i, boolean b) { progress = i; } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { galleryPager.setCurrentItem(progress + 1, false); } }); loadErrorLayout.setBackgroundColor(0xFF444444); loadErrorTips.setTextColor(0x80FFFFFF); Intent intent = getIntent(); mComicId = intent.getIntExtra(GALLERY_CMOIC_ID, -1); firstLetter = intent.getStringExtra(GALLERY_CMOIC_FIRST_LETTER); mChapters = intent.getParcelableArrayListExtra(GALLERY_CHAPTER_LIST); mCurChapterPosition = intent.getIntExtra(GALLERY_CHAPTER_POSITION, -1); mLastChapterPosition = mCurChapterPosition; mHistoryBrowsePosition = intent.getIntExtra(GALLERY_BROWSE_POSITION, 1); mToolbar.setTitle(mChapters.get(mCurChapterPosition).chapterTitle); galleryPager.setCurrentItem(1, false); fetchChapterContent(mChapters.get(mCurChapterPosition).chapterId); } @Override public void showMessageSnackbar(int resId) { SnackbarUtils.showShort(galleryPager, resId); } @Override public void updatePagerContent(List<String> urls, List<byte[]> bytes, boolean isFromDisk) { mToolbar.setTitle(mChapters.get(mCurChapterPosition).chapterTitle); int count = isFromDisk ? bytes.size() : urls.size(); totalPages.setText(String.valueOf(count)); seekBar.setMax(count - 1); galleryPager.setCurrentItem(1, false); mPagerAdapter.replaceAll(urls, bytes, isFromDisk); galleryPager.setLocked(false); seekBar.setEnabled(true); if (useHistory) { useHistory = false; galleryPager.setCurrentItem(mHistoryBrowsePosition, false); } // galleryPager.setCurrentItem(1, false); } @Override public void loadError() { galleryPager.setCurrentItem(intCurPage < 1 ? 1 : intCurPage); mCurChapterPosition = mLastChapterPosition; if (mPagerAdapter.getCount() == 3) { loadErrorLayout.setVisibility(View.VISIBLE); } else { galleryPager.setLocked(false); seekBar.setEnabled(true); } } private void fetchChapterContent(int chapterId) { // @formatter:off // presenter.updateReadHistory(mComicId, chapterId); String url = GComicApi.getInstance().generateDownloadUrl(firstLetter, mComicId, chapterId); String path = DownloadTasksManager.getInstance(this).generatePath(url); int id = FileDownloadUtils.generateId(url, path); if (DownloadTasksManager.getInstance(this).isExist(path) && DownloadTasksManager.getInstance(this).isDownloadedById(id)) { presenter.fetchPicturesFromDisk(path); } else { presenter.fetchChapterDetails(mComicId, chapterId); } } public void toggleSystemUi() { boolean isShown = mToolbar.getAlpha() == 1.0f; ViewCompat.animate(mToolbar).alpha(isShown ? 0.0f : 1.0f).start(); ViewCompat.animate(bottomBar).alpha(isShown ? 0.0f : 1.0f) .setListener(new ViewPropertyAnimatorListenerAdapter() { @Override public void onAnimationStart(View view) { super.onAnimationStart(view); if (view.isShown()) { return; } view.setVisibility(View.VISIBLE); } @Override public void onAnimationEnd(View view) { super.onAnimationEnd(view); if (view.getAlpha() == 1.0f) { return; } view.setVisibility(View.INVISIBLE); } }).start(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { mDecorView.setSystemUiVisibility(isShown ? FULL_SCREEN_FLAG : NOT_FULL_SCREEN_FLAG); } } @Override protected void onPause() { super.onPause(); presenter.updateReadHistory(mComicId, mChapters.get(mCurChapterPosition).chapterId, intCurPage); } @Override protected void onDestroy() { mHandler.removeCallbacks(mPreviousRunnable); mHandler.removeCallbacks(mNextRunnable); super.onDestroy(); } }