354 lines
16 KiB
Java
354 lines
16 KiB
Java
package com.philliphsu.clock2;
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import android.content.Intent;
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import android.graphics.drawable.Drawable;
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import android.os.Build;
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import android.os.Bundle;
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import android.support.design.widget.FloatingActionButton;
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import android.support.design.widget.TabLayout;
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import android.support.v4.app.Fragment;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentPagerAdapter;
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import android.support.v4.content.ContextCompat;
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import android.support.v4.view.ViewPager;
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import android.util.SparseArray;
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import android.view.LayoutInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import com.philliphsu.clock2.alarms.AlarmsFragment;
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import com.philliphsu.clock2.settings.SettingsActivity;
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import com.philliphsu.clock2.stopwatch.StopwatchFragment;
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import com.philliphsu.clock2.timers.TimersFragment;
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import butterknife.Bind;
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public class MainActivity extends BaseActivity {
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private static final String TAG = "MainActivity";
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/**
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* The {@link android.support.v4.view.PagerAdapter} that will provide
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* fragments for each of the sections. We use a
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* {@link FragmentPagerAdapter} derivative, which will keep every
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* loaded fragment in memory. If this becomes too memory intensive, it
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* may be best to switch to a
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* {@link android.support.v4.app.FragmentStatePagerAdapter}.
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*/
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private SectionsPagerAdapter mSectionsPagerAdapter;
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private Drawable mAddItemDrawable;
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// // For delaying fab.show() on SCROLL_STATE_SETTLING
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// private final Handler mHandler = new Handler();
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//
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// private boolean mScrollStateDragging;
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// private int mPageDragging = -1; // TOneverDO: initial value >= 0
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// private boolean mDraggingPastEndBoundaries;
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@Bind(R.id.container)
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ViewPager mViewPager;
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@Bind(R.id.fab)
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FloatingActionButton mFab;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// TODO: On device rotation, if we were last on stopwatch page, restore the fab's translationX.
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// Create the adapter that will return a fragment for each of the three
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// primary sections of the activity.
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mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
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mViewPager.setAdapter(mSectionsPagerAdapter);
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mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
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/**
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* @param position Either the current page position if the offset is increasing,
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* or the previous page position if it is decreasing.
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* @param positionOffset If increasing from [0, 1), scrolling right and position = currentPagePosition
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* If decreasing from (1, 0], scrolling left and position = (currentPagePosition - 1)
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*/
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@Override
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public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
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// Log.d(TAG, String.format("pos = %d, posOffset = %f, posOffsetPixels = %d",
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// position, positionOffset, positionOffsetPixels));
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int pageBeforeLast = mSectionsPagerAdapter.getCount() - 2;
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if (position <= pageBeforeLast) {
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if (position < pageBeforeLast) {
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// When the scrolling is due to tab selection between multiple tabs apart,
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// this callback is called for each intermediate page, but each of those pages
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// will briefly register a sparsely decreasing range of positionOffsets, always
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// from (1, 0). As such, you would notice the FAB to jump back and forth between
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// x-positions as each intermediate page is scrolled through.
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// This is a visual optimization that ends the translation motion, immediately
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// returning the FAB to its target position.
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// TODO: The animation visibly skips to the end. We could interpolate
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// intermediate x-positions if we cared to smooth it out.
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mFab.setTranslationX(0);
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} else {
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// Initially, the FAB's translationX property is zero because, at its original
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// position, it is not translated. setTranslationX() is relative to the view's
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// left position, at its original position; this left position is taken to be
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// the zero point of the coordinate system relative to this view. As your
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// translationX value is increasingly negative, the view is translated left.
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// But as translationX is decreasingly negative and down to zero, the view
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// is translated right, back to its original position.
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float translationX = positionOffsetPixels / -2f;
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// NOTE: You MUST scale your own additional pixel offsets by positionOffset,
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// or else the FAB will immediately translate by that many pixels, causing
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// jitter as you scroll.
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final int margin;
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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// Since each side's margin is the same, any side's would do.
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margin = ((ViewGroup.MarginLayoutParams) mFab.getLayoutParams()).rightMargin;
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} else {
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// Pre-Lollipop has measurement issues with FAB margins. This is
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// probably as good as we can get to centering the FAB, without
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// hardcoding some small margin value.
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margin = 0;
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}
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// Translation is done relative to a view's left position; by adding
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// an offset of half the FAB's width, we effectively rebase the translation
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// relative to the view's center position.
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translationX += positionOffset * (mFab.getWidth() / 2f + margin);
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mFab.setTranslationX(translationX);
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}
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}
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}
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@Override
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public void onPageSelected(int position) {
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if (position < mSectionsPagerAdapter.getCount() - 1) {
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mFab.setImageDrawable(mAddItemDrawable);
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}
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Fragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
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if (f instanceof BaseFragment) {
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((BaseFragment) f).onPageSelected();
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}
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}
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// @Override
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// public void onPageScrollStateChanged(int state) {
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// // TODO: This was not sufficient to prevent the user from quickly
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// // hitting the fab for the previous page.
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// switch (state) {
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// case ViewPager.SCROLL_STATE_DRAGGING:
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// if (mDraggingPastEndBoundaries) {
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// return;
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// }
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// mScrollStateDragging = true;
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// mPageDragging = mViewPager.getCurrentItem();
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// mFab.hide();
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// break;
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// case ViewPager.SCROLL_STATE_SETTLING:
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// if (!mScrollStateDragging) {
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// mFab.hide();
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// }
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// mScrollStateDragging = false;
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// // getCurrentItem() has changed to the target page we're settling on.
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// // 200ms is the same as show/hide animation duration
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// int targetPage = mViewPager.getCurrentItem();
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// if (targetPage != 2) { // TODO: Use page constant
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// int delay = mPageDragging == targetPage ? 0 : 200;
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// mHandler.postDelayed(new Runnable() {
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// @Override
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// public void run() {
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// mFab.show();
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// }
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// }, delay);
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// }
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// mPageDragging = -1;
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// break;
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// case ViewPager.SCROLL_STATE_IDLE:
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// // Nothing
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// break;
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// }
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// }
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});
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// mViewPager.setPageTransformer(false, new ViewPager.PageTransformer() {
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// @Override
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// public void transformPage(View page, float position) {
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// Log.d(TAG, "position: " + position);
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// // position represents a page's offset from the front-and-center position of 0 (the page
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// // that is in full view). Consider pages A, B, C, D.
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// // If we are now on page A (position 0), then pages B, C, and D are respectively
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// // in positions 1, 2, 3.
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// // If we move to the right to page B (now in position 0), then pages A, C, D are
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// // respectively in positions -1, 1, 2.
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// int currentPage = mViewPager.getCurrentItem();
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// // TODO: Use page constants
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// // Page 0 can't move one full page position to the right (i.e. there is no page to
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// // the left of page 0 that can adopt the front-and-center position of 0 while page 0
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// // moves to adopt position 1)
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// mDraggingPastEndBoundaries = currentPage == 0 && position >= 0f
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// // The last page can't move one full page position to the left (i.e. there
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// // is no page to the right of the last page that can adopt the front-and-center
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// // position of 0 while the last page moves to adopt position -1)
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// || currentPage == mSectionsPagerAdapter.getCount() - 1 && position <= 0f;
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// Log.d(TAG, "Draggin past end bounds: " + mDraggingPastEndBoundaries);
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// }
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// });
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TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
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tabLayout.setupWithViewPager(mViewPager);
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// Using the resources is fine since tab icons will never change once they are set.
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tabLayout.getTabAt(0).setIcon(R.drawable.ic_alarm_24dp);
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tabLayout.getTabAt(1).setIcon(R.drawable.ic_timer_24dp);
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tabLayout.getTabAt(2).setIcon(R.drawable.ic_stopwatch_24dp);
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// TODO: @OnCLick instead.
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mFab.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View view) {
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// Intent intent = new Intent(MainActivity.this, EditAlarmActivity.class);
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// // Call Fragment#startActivityForResult() instead of Activity#startActivityForResult()
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// // because we want the result to be handled in the Fragment, not in this Activity.
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// // FragmentActivity does NOT deliver the result to the Fragment, i.e. your
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// // Fragment's onActivityResult() will NOT be called.
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// mSectionsPagerAdapter.getFragment()
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// .startActivityForResult(intent, AlarmsFragment.REQUEST_CREATE_ALARM);
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Fragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
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if (f instanceof RecyclerViewFragment) {
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((RecyclerViewFragment) f).onFabClick();
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}
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}
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});
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mAddItemDrawable = ContextCompat.getDrawable(this, R.drawable.ic_add_24dp);
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}
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@Override
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protected int layoutResId() {
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return R.layout.activity_main;
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}
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@Override
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protected int menuResId() {
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return R.menu.menu_main;
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}
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@Override
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protected boolean isDisplayHomeUpEnabled() {
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return false;
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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// Handle action bar item clicks here. The action bar will
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// automatically handle clicks on the Home/Up button, so long
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// as you specify a parent activity in AndroidManifest.xml.
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int id = item.getItemId();
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//noinspection SimplifiableIfStatement
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if (id == R.id.action_settings) {
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startActivity(new Intent(this, SettingsActivity.class));
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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/**
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* A placeholder fragment containing a simple view.
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*/
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public static class PlaceholderFragment extends Fragment {
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/**
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* The fragment argument representing the section number for this
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* fragment.
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*/
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private static final String ARG_SECTION_NUMBER = "section_number";
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public PlaceholderFragment() {
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}
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/**
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* Returns a new instance of this fragment for the given section
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* number.
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*/
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public static PlaceholderFragment newInstance(int sectionNumber) {
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PlaceholderFragment fragment = new PlaceholderFragment();
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Bundle args = new Bundle();
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args.putInt(ARG_SECTION_NUMBER, sectionNumber);
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fragment.setArguments(args);
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return fragment;
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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Bundle savedInstanceState) {
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View rootView = inflater.inflate(R.layout.fragment_main, container, false);
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TextView textView = (TextView) rootView.findViewById(R.id.section_label);
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textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
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return rootView;
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}
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}
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/**
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* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
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* one of the sections/tabs/pages.
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*/
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private static class SectionsPagerAdapter extends FragmentPagerAdapter {
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// We can't use an ArrayList because the structure reorganizes as elements are removed,
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// so page indices won't stay in sync with list indices. SparseArray allows you to have
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// gaps in your range of indices.
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private final SparseArray<Fragment> mFragments = new SparseArray<>(getCount());
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public SectionsPagerAdapter(FragmentManager fm) {
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super(fm);
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}
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@Override
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public Fragment getItem(int position) {
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// getItem is called to instantiate the fragment for the given page.
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switch (position) {
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case 0:
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return AlarmsFragment.newInstance(1);
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case 1:
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return new TimersFragment();
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case 2:
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return new StopwatchFragment();
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default:
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return PlaceholderFragment.newInstance(position + 1);
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}
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}
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@Override
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public Object instantiateItem(ViewGroup container, int position) {
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Fragment fragment = (Fragment) super.instantiateItem(container, position);
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mFragments.put(position, fragment);
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return fragment;
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}
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@Override
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public void destroyItem(ViewGroup container, int position, Object object) {
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mFragments.remove(position);
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super.destroyItem(container, position, object);
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}
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@Override
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public int getCount() {
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// Show 3 total pages.
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return 3;
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}
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// TODO: If you wish to have text labels for your tabs, then implement this method.
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// @Override
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// public CharSequence getPageTitle(int position) {
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// switch (position) {
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// case 0:
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// return "SECTION 1";
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// case 1:
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// return "SECTION 2";
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// case 2:
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// return "SECTION 3";
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// }
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// return null;
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// }
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public Fragment getFragment(int position) {
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return mFragments.get(position);
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}
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}
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}
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