Java tutorial
/* == This file is part of Tomahawk Player - <http://tomahawk-player.org> === * * Copyright 2014, Enno Gottschalk <mrmaffen@googlemail.com> * * Tomahawk 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. * * Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>. */ package org.tomahawk.tomahawk_android.views; import org.tomahawk.tomahawk_android.R; import org.tomahawk.tomahawk_android.TomahawkApp; import org.tomahawk.tomahawk_android.adapters.TomahawkPagerAdapter; import org.tomahawk.tomahawk_android.fragments.PagerFragment; import org.tomahawk.tomahawk_android.utils.AnimationUtils; import org.tomahawk.tomahawk_android.utils.FragmentInfo; import org.tomahawk.tomahawk_android.utils.OnSizeChangedListener; import android.content.Context; import android.graphics.ColorFilter; import android.graphics.PorterDuff; import android.graphics.PorterDuffColorFilter; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.view.animation.Animation; import android.view.animation.RotateAnimation; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import java.util.ArrayList; import java.util.List; public class PageIndicator extends LinearLayout implements ViewPager.OnPageChangeListener { private ViewPager mViewPager; private List<PagerFragment.FragmentInfoList> mFragmentInfosList; private final List<View> mItems = new ArrayList<>(); private View mRootview; private Selector mSelector; private String mSelectorPosStorageKey; private OnSizeChangedListener mOnSizeChangedListener; public PageIndicator(Context context) { super(context); } public PageIndicator(Context context, AttributeSet attrs) { super(context, attrs); } public void setup(ViewPager viewPager, List<PagerFragment.FragmentInfoList> fragmentInfosList, View rootView, Selector selector, String selectorPosStorageKey) { mViewPager = viewPager; mFragmentInfosList = fragmentInfosList; mRootview = rootView; mSelector = selector; mSelectorPosStorageKey = selectorPosStorageKey; populate(); } private void populate() { removeAllViews(); mItems.clear(); for (int i = 0; i < mViewPager.getAdapter().getCount(); i++) { LayoutInflater inflater = (LayoutInflater) getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); final View item = inflater.inflate(R.layout.page_indicator_item, this, false); final TextView textView = (TextView) item.findViewById(R.id.textview); textView.setText(mViewPager.getAdapter().getPageTitle(i)); final int j = i; if (mFragmentInfosList.get(i).size() > 1) { final ImageView arrow = (ImageView) item.findViewById(R.id.arrow); arrow.setVisibility(VISIBLE); item.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (!mSelector.isListShowing()) { rotateArrow(arrow, false); mViewPager.setCurrentItem(j); final List<FragmentInfo> fragmentInfos = mFragmentInfosList.get(j).getFragmentInfos(); Selector.SelectorListener selectorListener = new Selector.SelectorListener() { @Override public void onSelectorItemSelected(int position) { rotateArrow(arrow, true); FragmentInfo selectedItem = fragmentInfos.get(position); ((TomahawkPagerAdapter) mViewPager.getAdapter()).changeFragment(j, selectedItem); TextView textView = (TextView) mItems.get(j).findViewById(R.id.textview); textView.setText(selectedItem.mTitle); ImageView imageView = (ImageView) item.findViewById(R.id.imageview); imageView.setImageResource(selectedItem.mIconResId); } @Override public void onCancel() { rotateArrow(arrow, true); } }; mSelector.setup(fragmentInfos, selectorListener, mRootview, mSelectorPosStorageKey); mSelector.showSelectorList(); } else { rotateArrow(arrow, true); mSelector.hideSelectorList(); } } }); } else { item.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mSelector.hideSelectorList(); mViewPager.setCurrentItem(j); } }); } if (mFragmentInfosList.get(i).getCurrentFragmentInfo().mIconResId > 0) { ImageView imageView = (ImageView) item.findViewById(R.id.imageview); imageView.setVisibility(VISIBLE); imageView.setImageResource(mFragmentInfosList.get(i).getCurrentFragmentInfo().mIconResId); } if (i != 0) { View spacer = inflater.inflate(R.layout.page_indicator_spacer, this, false); addView(spacer); } addView(item); mItems.add(item); updateColors(mViewPager.getCurrentItem()); } } private void rotateArrow(View arrow, boolean reverse) { RotateAnimation rotate; if (reverse) { rotate = new RotateAnimation(180, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); } else { rotate = new RotateAnimation(360, 180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); } rotate.setDuration(AnimationUtils.DURATION_ARROWROTATE); arrow.startAnimation(rotate); rotate.setFillAfter(true); } private void updateColors(int position) { for (int i = 0; i < mItems.size(); i++) { TextView textView = (TextView) mItems.get(i).findViewById(R.id.textview); ImageView imageView = (ImageView) mItems.get(i).findViewById(R.id.imageview); ImageView arrow = (ImageView) mItems.get(i).findViewById(R.id.arrow); if (i == position) { textView.setTextColor(getResources().getColor(R.color.primary_textcolor_inverted)); imageView.clearColorFilter(); arrow.clearColorFilter(); } else { textView.setTextColor(getResources().getColor(R.color.tertiary_textcolor_inverted)); ColorFilter grayOutFilter = new PorterDuffColorFilter( TomahawkApp.getContext().getResources().getColor(R.color.tertiary_textcolor_inverted), PorterDuff.Mode.MULTIPLY); imageView.setColorFilter(grayOutFilter); arrow.setColorFilter(grayOutFilter); } } } @Override public void onPageScrolled(int i, float v, int i2) { } @Override public void onPageSelected(int position) { updateColors(position); } @Override public void onPageScrollStateChanged(int i) { } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); if (mOnSizeChangedListener != null) { mOnSizeChangedListener.onSizeChanged(w, h, oldw, oldh); } } public void setOnSizeChangedListener(OnSizeChangedListener listener) { mOnSizeChangedListener = listener; } }