Java tutorial
/* * ****************************************************************************** * Copyright (c) 2015 Yang Feng. * * 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.ffmpeger.card.ui; import android.animation.ArgbEvaluator; import android.animation.ObjectAnimator; import android.animation.TypeEvaluator; import android.animation.ValueAnimator; import android.content.Intent; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.view.ViewCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.widget.Toolbar; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.animation.DecelerateInterpolator; import android.widget.ImageView; import android.widget.TextView; import com.ffmpeger.card.R; import com.ffmpeger.card.Utils; import com.ffmpeger.card.utils.PrefUtils; import java.util.ArrayList; /** * @author Yang Feng (e13310@gmail.com) */ public abstract class BaseNaviActivity extends AbstractIabActivity { // Navigation drawer: private DrawerLayout mDrawerLayout; private static final TypeEvaluator ARGB_EVALUATOR = new ArgbEvaluator(); private ObjectAnimator mStatusBarColorAnimator; private int mThemedStatusBarColor; private int mNormalStatusBarColor; // When set, these components will be shown/hidden in sync with the action bar // to implement the "quick recall" effect (the Action Bar and the header views disappear // when you scroll down a list, and reappear quickly when you scroll up). private ArrayList<View> mHideableHeaderViews = new ArrayList<View>(); // Primary toolbar and drawer toggle private Toolbar mActionBarToolbar; // Durations for certain animations we use: private static final int HEADER_HIDE_ANIM_DURATION = 300; // list of navdrawer items that were actually added to the navdrawer, in order private ArrayList<Integer> mNavDrawerItems = new ArrayList<Integer>(); // symbols for navdrawer items (indices must correspond to array below). This is // not a list of items that are necessarily *present* in the Nav Drawer; rather, // it's a list of all possible items. protected static final int NAVDRAWER_ITEM_NATIVE_CARDSLIB = 0; protected static final int NAVDRAWER_ITEM_CARDSLIB_V1 = 1; protected static final int NAVDRAWER_ITEM_GUIDELINES = 2; protected static final int NAVDRAWER_ITEM_GITHUB = 3; protected static final int NAVDRAWER_ITEM_DONATE = 4; protected static final int NAVDRAWER_ITEM_INFO = 5; protected static final int NAVDRAWER_ITEM_INVALID = -1; protected static final int NAVDRAWER_ITEM_SEPARATOR = -2; protected static final int NAVDRAWER_ITEM_SEPARATOR_SPECIAL = -3; private ViewGroup mDrawerItemsListContainer; // views that correspond to each navdrawer item, null if not yet created private View[] mNavDrawerItemViews = null; // titles for navdrawer items (indices must correspond to the above) private static final int[] NAVDRAWER_TITLE_RES_ID = new int[] { R.string.navdrawer_item_native_cardslib, R.string.navdrawer_item_cardslib_v1, R.string.navdrawer_item_guidelines, R.string.navdrawer_item_github, R.string.navdrawer_item_donate, R.string.navdrawer_item_info }; // icons for navdrawer items (indices must correspond to above array) private static final int[] NAVDRAWER_ICON_RES_ID = new int[] { R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_warning_black_36dp, R.drawable.ic_github, R.drawable.ic_money, R.drawable.ic_l_info }; // delay to launch nav drawer item, to allow close animation to play private static final int NAVDRAWER_LAUNCH_DELAY = 250; // fade in and fade out durations for the main content when switching between // different Activities of the app through the Nav Drawer private static final int MAIN_CONTENT_FADEOUT_DURATION = 150; private static final int MAIN_CONTENT_FADEIN_DURATION = 250; // variables that control the Action Bar auto hide behavior (aka "quick recall") private boolean mActionBarAutoHideEnabled = false; private boolean mActionBarShown = true; // A Runnable that we should execute when the navigation drawer finishes its closing animation private Runnable mDeferredOnDrawerClosedRunnable; private Handler mHandler; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mThemedStatusBarColor = getResources().getColor(R.color.demo_colorPrimaryDark); mNormalStatusBarColor = mThemedStatusBarColor; mHandler = new Handler(); } @Override public void setContentView(int layoutResID) { super.setContentView(layoutResID); getActionBarToolbar(); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); setupNavDrawer(); } //---------------------------------------------------------------------------- // Navigation Drawer //---------------------------------------------------------------------------- /** * Sets up the navigation drawer as appropriate. Note that the nav drawer will be * different depending on whether the attendee indicated that they are attending the * event on-site vs. attending remotely. */ private void setupNavDrawer() { // What nav drawer item should be selected? int selfItem = getSelfNavDrawerItem(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); if (mDrawerLayout == null) { return; } mDrawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.demo_colorPrimaryDark)); if (selfItem == NAVDRAWER_ITEM_INVALID) { // do not show a nav drawer View navDrawer = mDrawerLayout.findViewById(R.id.navdrawer); if (navDrawer != null) { ((ViewGroup) navDrawer.getParent()).removeView(navDrawer); } mDrawerLayout = null; return; } if (mActionBarToolbar != null) { mActionBarToolbar.setNavigationIcon(R.drawable.ic_navigation_drawer); mActionBarToolbar.setNavigationOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mDrawerLayout.openDrawer(Gravity.START); } }); } mDrawerLayout.setDrawerListener(new DrawerLayout.DrawerListener() { @Override public void onDrawerClosed(View drawerView) { // run deferred action, if we have one if (mDeferredOnDrawerClosedRunnable != null) { mDeferredOnDrawerClosedRunnable.run(); mDeferredOnDrawerClosedRunnable = null; } //invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() //updateStatusBarForNavDrawerSlide(0f); onNavDrawerStateChanged(false, false); } @Override public void onDrawerOpened(View drawerView) { //invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() //updateStatusBarForNavDrawerSlide(1f); onNavDrawerStateChanged(true, false); } @Override public void onDrawerStateChanged(int newState) { //invalidateOptionsMenu(); onNavDrawerStateChanged(isNavDrawerOpen(), newState != DrawerLayout.STATE_IDLE); } @Override public void onDrawerSlide(View drawerView, float slideOffset) { //updateStatusBarForNavDrawerSlide(slideOffset); onNavDrawerSlide(slideOffset); } }); mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, Gravity.START); //getActionBar().setDisplayHomeAsUpEnabled(true); //getActionBar().setHomeButtonEnabled(true); // populate the nav drawer with the correct items populateNavDrawer(); // When the user runs the app for the first time, we want to land them with the // navigation drawer open. But just the first time. if (!PrefUtils.isWelcomeDone(this)) { // first run of the app starts with the nav drawer open PrefUtils.markWelcomeDone(this); mDrawerLayout.openDrawer(Gravity.START); } } /** * Returns the navigation drawer item that corresponds to this Activity. Subclasses * of BaseActivity override this to indicate what nav drawer item corresponds to them * Return NAVDRAWER_ITEM_INVALID to mean that this Activity should not have a Nav Drawer. */ protected int getSelfNavDrawerItem() { return NAVDRAWER_ITEM_INVALID; } // Subclasses can override this for custom behavior protected void onNavDrawerStateChanged(boolean isOpen, boolean isAnimating) { if (mActionBarAutoHideEnabled && isOpen) { autoShowOrHideActionBar(true); } } protected void autoShowOrHideActionBar(boolean show) { if (show == mActionBarShown) { return; } mActionBarShown = show; onActionBarAutoShowOrHide(show); } protected boolean isNavDrawerOpen() { return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(Gravity.START); } private void updateStatusBarForNavDrawerSlide(float slideOffset) { } protected void onNavDrawerSlide(float offset) { } /** Populates the navigation drawer with the appropriate items. */ private void populateNavDrawer() { mNavDrawerItems.clear(); // Explore is always shown mNavDrawerItems.add(NAVDRAWER_ITEM_NATIVE_CARDSLIB); mNavDrawerItems.add(NAVDRAWER_ITEM_SEPARATOR); mNavDrawerItems.add(NAVDRAWER_ITEM_CARDSLIB_V1); mNavDrawerItems.add(NAVDRAWER_ITEM_SEPARATOR_SPECIAL); mNavDrawerItems.add(NAVDRAWER_ITEM_GUIDELINES); mNavDrawerItems.add(NAVDRAWER_ITEM_GITHUB); mNavDrawerItems.add(NAVDRAWER_ITEM_DONATE); mNavDrawerItems.add(NAVDRAWER_ITEM_INFO); createNavDrawerItems(); } private void createNavDrawerItems() { mDrawerItemsListContainer = (ViewGroup) findViewById(R.id.navdrawer_items_list); if (mDrawerItemsListContainer == null) { return; } mNavDrawerItemViews = new View[mNavDrawerItems.size()]; mDrawerItemsListContainer.removeAllViews(); int i = 0; for (int itemId : mNavDrawerItems) { mNavDrawerItemViews[i] = makeNavDrawerItem(itemId, mDrawerItemsListContainer); mDrawerItemsListContainer.addView(mNavDrawerItemViews[i]); ++i; } } private View makeNavDrawerItem(final int itemId, ViewGroup container) { boolean selected = getSelfNavDrawerItem() == itemId; int layoutToInflate = 0; if (itemId == NAVDRAWER_ITEM_SEPARATOR) { layoutToInflate = R.layout.navdrawer_separator; } else if (itemId == NAVDRAWER_ITEM_SEPARATOR_SPECIAL) { layoutToInflate = R.layout.navdrawer_separator; } else { layoutToInflate = R.layout.navdrawer_item; } View view = getLayoutInflater().inflate(layoutToInflate, container, false); if (isSeparator(itemId)) { // we are done //UIUtils.setAccessibilityIgnore(view); return view; } ImageView iconView = (ImageView) view.findViewById(R.id.icon); TextView titleView = (TextView) view.findViewById(R.id.title); int iconId = itemId >= 0 && itemId < NAVDRAWER_ICON_RES_ID.length ? NAVDRAWER_ICON_RES_ID[itemId] : 0; int titleId = itemId >= 0 && itemId < NAVDRAWER_TITLE_RES_ID.length ? NAVDRAWER_TITLE_RES_ID[itemId] : 0; // set icon and text iconView.setVisibility(iconId > 0 ? View.VISIBLE : View.GONE); if (iconId > 0) { iconView.setImageResource(iconId); } titleView.setText(getString(titleId)); formatNavDrawerItem(view, itemId, selected); view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onNavDrawerItemClicked(itemId); } }); return view; } private void onNavDrawerItemClicked(final int itemId) { if (itemId == getSelfNavDrawerItem()) { mDrawerLayout.closeDrawer(Gravity.START); return; } if (isSpecialItem(itemId)) { goToNavDrawerItem(itemId); } else { // launch the target Activity after a short delay, to allow the close animation to play mHandler.postDelayed(new Runnable() { @Override public void run() { goToNavDrawerItem(itemId); } }, NAVDRAWER_LAUNCH_DELAY); // change the active item on the list so the user can see the item changed setSelectedNavDrawerItem(itemId); // fade out the main content View mainContent = findViewById(R.id.container); if (mainContent != null) { mainContent.animate().alpha(0).setDuration(MAIN_CONTENT_FADEOUT_DURATION); } } mDrawerLayout.closeDrawer(Gravity.START); } private void formatNavDrawerItem(View view, int itemId, boolean selected) { if (isSeparator(itemId)) { // not applicable return; } ImageView iconView = (ImageView) view.findViewById(R.id.icon); TextView titleView = (TextView) view.findViewById(R.id.title); // configure its appearance according to whether or not it's selected titleView.setTextColor(selected ? getResources().getColor(R.color.navdrawer_text_color_selected) : getResources().getColor(R.color.navdrawer_text_color)); iconView.setColorFilter(selected ? getResources().getColor(R.color.navdrawer_icon_tint_selected) : getResources().getColor(R.color.navdrawer_icon_tint)); } private boolean isSpecialItem(int itemId) { return itemId == NAVDRAWER_ITEM_DONATE || itemId == NAVDRAWER_ITEM_INFO || itemId == NAVDRAWER_ITEM_GITHUB; } private boolean isSeparator(int itemId) { return itemId == NAVDRAWER_ITEM_SEPARATOR || itemId == NAVDRAWER_ITEM_SEPARATOR_SPECIAL; } private void goToNavDrawerItem(int item) { Intent intent; switch (item) { case NAVDRAWER_ITEM_NATIVE_CARDSLIB: intent = new Intent(this, NativeMenuActivity.class); startActivity(intent); finish(); break; case NAVDRAWER_ITEM_CARDSLIB_V1: intent = new Intent(this, V1MenuActivity.class); startActivity(intent); finish(); break; case NAVDRAWER_ITEM_GUIDELINES: intent = new Intent(this, GuidelinesActivity.class); startActivity(intent); finish(); break; case NAVDRAWER_ITEM_DONATE: showBeer(); break; case NAVDRAWER_ITEM_INFO: Utils.showAbout(this); break; case NAVDRAWER_ITEM_GITHUB: String url = "https://github.com/gabrielemariotti/cardslib/"; Intent i = new Intent(Intent.ACTION_VIEW); i.setData(Uri.parse(url)); startActivity(i); break; } } /** * Sets up the given navdrawer item's appearance to the selected state. Note: this could * also be accomplished (perhaps more cleanly) with state-based layouts. */ private void setSelectedNavDrawerItem(int itemId) { if (mNavDrawerItemViews != null) { for (int i = 0; i < mNavDrawerItemViews.length; i++) { if (i < mNavDrawerItems.size()) { int thisItemId = mNavDrawerItems.get(i); formatNavDrawerItem(mNavDrawerItemViews[i], thisItemId, itemId == thisItemId); } } } } //---------------------------------------------------------------------------- // Bundle //---------------------------------------------------------------------------- /** * Converts an intent into a {@link Bundle} suitable for use as fragment arguments. */ public static Bundle intentToFragmentArguments(Intent intent) { Bundle arguments = new Bundle(); if (intent == null) { return arguments; } final Uri data = intent.getData(); if (data != null) { arguments.putParcelable("_uri", data); } final Bundle extras = intent.getExtras(); if (extras != null) { arguments.putAll(intent.getExtras()); } return arguments; } /** * Converts a fragment arguments bundle into an intent. */ public static Intent fragmentArgumentsToIntent(Bundle arguments) { Intent intent = new Intent(); if (arguments == null) { return intent; } final Uri data = arguments.getParcelable("_uri"); if (data != null) { intent.setData(data); } intent.putExtras(arguments); intent.removeExtra("_uri"); return intent; } //---------------------------------------------------------------------------- // Toolbar //---------------------------------------------------------------------------- protected Toolbar getActionBarToolbar() { if (mActionBarToolbar == null) { mActionBarToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar); if (mActionBarToolbar != null) { setSupportActionBar(mActionBarToolbar); } } return mActionBarToolbar; } protected void registerHideableHeaderView(View hideableHeaderView) { if (!mHideableHeaderViews.contains(hideableHeaderView)) { mHideableHeaderViews.add(hideableHeaderView); } } protected void deregisterHideableHeaderView(View hideableHeaderView) { if (mHideableHeaderViews.contains(hideableHeaderView)) { mHideableHeaderViews.remove(hideableHeaderView); } } public int getThemedStatusBarColor() { return mThemedStatusBarColor; } public void setNormalStatusBarColor(int color) { mNormalStatusBarColor = color; if (mDrawerLayout != null) { mDrawerLayout.setStatusBarBackgroundColor(mNormalStatusBarColor); } } protected void onActionBarAutoShowOrHide(boolean shown) { if (mStatusBarColorAnimator != null) { mStatusBarColorAnimator.cancel(); } mStatusBarColorAnimator = ObjectAnimator .ofInt((mDrawerLayout != null) ? mDrawerLayout : getLPreviewUtils(), (mDrawerLayout != null) ? "statusBarBackgroundColor" : "statusBarColor", shown ? Color.BLACK : mNormalStatusBarColor, shown ? mNormalStatusBarColor : Color.BLACK) .setDuration(250); if (mDrawerLayout != null) { mStatusBarColorAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { ViewCompat.postInvalidateOnAnimation(mDrawerLayout); } }); } mStatusBarColorAnimator.setEvaluator(ARGB_EVALUATOR); mStatusBarColorAnimator.start(); for (View view : mHideableHeaderViews) { if (shown) { view.animate().translationY(0).alpha(1).setDuration(HEADER_HIDE_ANIM_DURATION) .setInterpolator(new DecelerateInterpolator()); } else { view.animate().translationY(-view.getBottom()).alpha(0).setDuration(HEADER_HIDE_ANIM_DURATION) .setInterpolator(new DecelerateInterpolator()); } } } }