Java tutorial
/* * Copyright (C) 2012,2013 Renard Wellnitz. * * 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.linhdq.test.documents.viewing.single; import android.content.res.Configuration; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.text.Html; import android.text.Spanned; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import com.example.linhdq.test.MonitoredActivity; import com.example.linhdq.test.R; import com.example.linhdq.test.documents.viewing.single.tts.TextSpeaker; import com.example.linhdq.test.util.PreferencesUtils; import com.viewpagerindicator.CirclePageIndicator; public class DocumentPagerFragment extends Fragment implements DocumentActivity.DocumentContainerFragment { private ViewPager mPager; private CirclePageIndicator mTitleIndicator; private boolean mIsTitleIndicatorVisible = false; private boolean mIsNewCursor; private Cursor mCursor; private DocumentAdapter mAdapter; private int mLastPosition = -1; private TextSpeaker mTextSpeaker = new TextSpeaker(); @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_document_pager, container, false); mPager = (ViewPager) v.findViewById(R.id.document_pager); mTitleIndicator = (CirclePageIndicator) v.findViewById(R.id.titles); mLastPosition = 0; initPager(); return v; } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); boolean isKeyboardHidden = Configuration.KEYBOARDHIDDEN_YES == newConfig.hardKeyboardHidden; boolean isKeyboardShown = Configuration.KEYBOARDHIDDEN_NO == newConfig.hardKeyboardHidden; if (isKeyboardShown) { showTitleIndicator(false); } else if (isKeyboardHidden) { showTitleIndicator(true); } } private void showTitleIndicator(final boolean show) { if (mIsTitleIndicatorVisible) { if (show) { mTitleIndicator.setVisibility(View.VISIBLE); } else { mTitleIndicator.setVisibility(View.GONE); } } } @Override public void onDestroyView() { super.onDestroyView(); mTextSpeaker.onDestroyView(); } public void applyTextPreferences() { final int count = mPager.getChildCount(); for (int i = 0; i < count; i++) { View v = mPager.getChildAt(i); EditText e = (EditText) v.findViewById(R.id.editText_document); PreferencesUtils.applyTextPreferences(e, getActivity()); } } public void setDisplayedPage(final int pageno) { mPager.setCurrentItem(pageno, true); } public void setDisplayedPageByDocumentId(final int documentId) { final int count = mAdapter.getCount(); for (int i = 0; i < count; i++) { final int id = mAdapter.getId(i); if (documentId == id) { mPager.setCurrentItem(i, false); return; } } } private void initPager() { if (mIsNewCursor && mPager != null) { if (mAdapter != null) { mAdapter.setCursor(mCursor); } else { mAdapter = new DocumentAdapter(getChildFragmentManager(), mCursor); mPager.setAdapter(mAdapter); } if (mAdapter.getCount() > 1) { mTitleIndicator.setViewPager(mPager); mIsTitleIndicatorVisible = true; mTitleIndicator.setVisibility(View.VISIBLE); } else { mTitleIndicator.setVisibility(View.GONE); } mTitleIndicator.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int position) { final DocumentTextFragment fragment = mAdapter.getFragment(mLastPosition); if (fragment != null) { fragment.saveIfTextHasChanged(); } mLastPosition = position; final String title = mAdapter.getLongTitle(position); ((MonitoredActivity) getActivity()).setToolbarMessage(title); } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageScrollStateChanged(int arg0) { } }); mIsNewCursor = false; } } @Override public String getTextOfCurrentlyShownDocument() { int currentItem = mPager.getCurrentItem(); final String htmlText = mAdapter.getText(currentItem); if (htmlText != null) { return Html.fromHtml(htmlText).toString(); } else { return null; } } @Override public int getDocumentCount() { if (mCursor != null) { return mCursor.getCount(); } else { return 0; } } @Override public void setCursor(Cursor cursor) { mIsNewCursor = true; mCursor = cursor; initPager(); } @Override public String getTextOfAllDocuments() { final DocumentTextFragment fragment = mAdapter.getFragment(mLastPosition); DocumentAdapter adapter = (DocumentAdapter) mPager.getAdapter(); final int count = adapter.getCount(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < count; i++) { String text = null; if (i == mLastPosition && fragment != null) { final Spanned documentText = fragment.getDocumentText(); if (!TextUtils.isEmpty(documentText)) { text = Html.toHtml(documentText); } } else { text = adapter.getText(i); } if (text != null) { if (sb.length() > 0) { sb.append("\n"); } sb.append(text); } } return sb.toString(); } @Override public void setShowText(boolean text) { mAdapter.setShowText(text); } @Override public boolean getShowText() { return mAdapter.getShowText(); } public TextSpeaker getTextSpeaker() { return mTextSpeaker; } }