Java tutorial
/* * Copyright 2013 Google Inc. * * 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.google.android.apps.dashclock.configuration; import com.google.android.apps.dashclock.Utils; import com.google.android.apps.dashclock.ui.PagerPositionStrip; import net.nurik.roman.dashclock.R; import android.app.Fragment; import android.app.backup.BackupManager; import android.content.SharedPreferences; import android.os.Bundle; import android.os.Handler; import android.preference.PreferenceManager; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.FrameLayout; import java.util.HashMap; import java.util.Map; /** * Fragment for allowing the user to configure widget appearance, shown within a {@link * ConfigurationActivity}. */ public class ConfigureAppearanceFragment extends Fragment { private static final int AUTO_HIDE_DELAY_MILLIS = 1 * Utils.SECONDS_MILLIS; private Handler mHandler = new Handler(); private Map<View, Runnable> mHidePositionStripRunnables = new HashMap<View, Runnable>(); private Map<String, String> mCurrentStyleNames = new HashMap<String, String>(); private int mAnimationDuration; private View[] mPositionStrips; private View mAppearanceContainerView; public ConfigureAppearanceFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mAnimationDuration = getResources().getInteger(android.R.integer.config_shortAnimTime); final SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity()); ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_configure_appearance, container, false); mCurrentStyleNames.put(AppearanceConfig.PREF_STYLE_TIME, sp.getString(AppearanceConfig.PREF_STYLE_TIME, AppearanceConfig.TIME_STYLE_NAMES[0])); configureStylePager((ViewPager) rootView.findViewById(R.id.pager_time_style), (PagerPositionStrip) rootView.findViewById(R.id.pager_time_position_strip), AppearanceConfig.TIME_STYLE_NAMES, AppearanceConfig.COMPONENT_TIME, Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM, AppearanceConfig.PREF_STYLE_TIME); mCurrentStyleNames.put(AppearanceConfig.PREF_STYLE_DATE, sp.getString(AppearanceConfig.PREF_STYLE_DATE, AppearanceConfig.DATE_STYLE_NAMES[0])); configureStylePager((ViewPager) rootView.findViewById(R.id.pager_date_style), (PagerPositionStrip) rootView.findViewById(R.id.pager_date_position_strip), AppearanceConfig.DATE_STYLE_NAMES, AppearanceConfig.COMPONENT_DATE, Gravity.CENTER_HORIZONTAL | Gravity.TOP, AppearanceConfig.PREF_STYLE_DATE); ((ConfigurationActivity) getActivity()).showWallpaper(); mAppearanceContainerView = rootView.findViewById(R.id.appearance_container); if (savedInstanceState == null) { getChildFragmentManager().beginTransaction() .add(R.id.appearance_more_container, new ConfigureAppearanceMoreFragment()).commit(); } return rootView; } @Override public void onResume() { super.onResume(); View rootView = getView(); if (rootView != null) { mPositionStrips = new View[] { rootView.findViewById(R.id.pager_time_position_strip), rootView.findViewById(R.id.pager_date_position_strip) }; for (View strip : mPositionStrips) { strip.setAlpha(0f); } showPositionStrips(true, AUTO_HIDE_DELAY_MILLIS); } } @Override public void onPause() { super.onPause(); final SharedPreferences.Editor sp = PreferenceManager.getDefaultSharedPreferences(getActivity()).edit(); for (String key : mCurrentStyleNames.keySet()) { sp.putString(key, mCurrentStyleNames.get(key)); } sp.commit(); new BackupManager(getActivity()).dataChanged(); } @Override public void onDestroy() { super.onDestroy(); // remove all scheduled runnables mHidePositionStripRunnables.clear(); mHandler.removeCallbacksAndMessages(null); } private void configureStylePager(final ViewPager pager, final PagerPositionStrip positionStrip, final String[] styleNames, final String styleComponent, final int gravity, final String preference) { String currentStyleName = mCurrentStyleNames.get(preference); final LayoutInflater inflater = getActivity().getLayoutInflater(); pager.setAdapter(new PagerAdapter() { @Override public int getCount() { return styleNames.length; } @Override public boolean isViewFromObject(View view, Object o) { return view == o; } @Override public Object instantiateItem(ViewGroup container, int position) { FrameLayout wrapper = new FrameLayout(getActivity()); ViewPager.LayoutParams wrapperLp = new ViewPager.LayoutParams(); wrapper.setLayoutParams(wrapperLp); String styleName = styleNames[position]; if (styleName.contains("analog")) { styleName += "_white"; } View v = inflater.inflate( AppearanceConfig.getLayoutByStyleName(getActivity(), styleComponent, styleName), container, false); FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); lp.gravity = gravity; v.setLayoutParams(lp); wrapper.addView(v); container.addView(wrapper); return wrapper; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } }); pager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { mCurrentStyleNames.put(preference, styleNames[position]); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { positionStrip.setPosition(position + positionOffset); } }); positionStrip.setPageCount(styleNames.length); pager.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getActionMasked()) { case MotionEvent.ACTION_DOWN: showPositionStrips(true, -1); break; case MotionEvent.ACTION_UP: showPositionStrips(false, AUTO_HIDE_DELAY_MILLIS); break; } return false; } }); for (int i = 0; i < styleNames.length; i++) { if (currentStyleName.equals(styleNames[i])) { pager.setCurrentItem(i); positionStrip.setPosition(i); break; } } } private void showPositionStrips(final boolean show, final int hideDelay) { // remove any currently scheduled runnables mHandler.removeCallbacks(mHidePositionStripsRunnable); // if show or hide immediately, take action now if (show || hideDelay <= 0) { for (View strip : mPositionStrips) { strip.animate().cancel(); strip.animate().alpha(show ? 1f : 0f).setDuration(mAnimationDuration); } } // schedule a hide if hideDelay > 0 if (hideDelay > 0) { mHandler.postDelayed(mHidePositionStripsRunnable, hideDelay); } } private Runnable mHidePositionStripsRunnable = new Runnable() { @Override public void run() { showPositionStrips(false, 0); } }; @Override public void onDetach() { super.onDetach(); } public void setAppearanceContainerTranslationY(int translationY) { mAppearanceContainerView.setTranslationY(translationY); } }