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Revert back to stable state

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This commit is contained in:
Phillip Hsu 2016-09-26 18:25:05 -07:00
parent 9fe07c763f
commit 66f04086b6
1 changed files with 181 additions and 149 deletions
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330
app/src/main/java/com/philliphsu/clock2/MainActivity.java
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@ -1,14 +1,15 @@
package com.philliphsu.clock2;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.preference.PreferenceManager;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.util.SparseArray;
@ -27,16 +28,13 @@ import butterknife.Bind;
public class MainActivity extends BaseActivity {
private static final String TAG = "MainActivity";
public static final int PAGE_ALARMS = 0;
public static final int PAGE_TIMERS = 1;
public static final int PAGE_STOPWATCH = 2;
public static final int PAGE_ALARMS = 0;
public static final int PAGE_TIMERS = 1;
public static final int PAGE_STOPWATCH = 2;
public static final String EXTRA_SHOW_PAGE = "com.philliphsu.clock2.extra.SHOW_PAGE";
public static final int REQUEST_THEME_CHANGE = 5;
private static final String LAST_TAB = "last_tab";
private static final int DEFAULT_TAB = 0;
public static final int REQUEST_THEME_CHANGE = 5;
private ModifyOffsetOnPageChangeListener mModifyFabPositionListener;
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
@ -46,12 +44,27 @@ public class MainActivity extends BaseActivity {
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
private Drawable mAddItemDrawable;
// // For delaying fab.show() on SCROLL_STATE_SETTLING
// private final Handler mHandler = new Handler();
//
// private boolean mScrollStateDragging;
// private int mPageDragging = -1; // TOneverDO: initial value >= 0
// private boolean mDraggingPastEndBoundaries;
@Bind(R.id.container)
ViewPager mViewPager;
ViewPager mViewPager;
@Bind(R.id.fab)
FloatingActionButton mFab;
// // https://medium.com/@chrisbanes/appcompat-v23-2-age-of-the-vectors-91cbafa87c88#.141274xy8
// // This is needed to load vector drawables from 23.4.0
// static {
// AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
// }
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
@ -68,7 +81,7 @@ public class MainActivity extends BaseActivity {
public void run() {
if (mViewPager.getCurrentItem() == mSectionsPagerAdapter.getCount() - 1) {
// Restore the FAB's translationX from a previous configuration.
mFab.setTranslationX(mViewPager.getWidth() / -2f + getFabPixelOffsetForXTranslation(mFab));
mFab.setTranslationX(mViewPager.getWidth() / -2f + getFabPixelOffsetForXTranslation());
}
}
});
@ -77,7 +90,124 @@ public class MainActivity extends BaseActivity {
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(mSectionsPagerAdapter);
this.mModifyFabPositionListener = new ModifyOffsetOnPageChangeListener(mFab, mSectionsPagerAdapter, mViewPager);
mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
/**
* @param position Either the current page position if the offset is increasing,
* or the previous page position if it is decreasing.
* @param positionOffset If increasing from [0, 1), scrolling right and position = currentPagePosition
* If decreasing from (1, 0], scrolling left and position = (currentPagePosition - 1)
*/
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
Log.d(TAG, String.format("pos = %d, posOffset = %f, posOffsetPixels = %d",
position, positionOffset, positionOffsetPixels));
int pageBeforeLast = mSectionsPagerAdapter.getCount() - 2;
if (position <= pageBeforeLast) {
if (position < pageBeforeLast) {
// When the scrolling is due to tab selection between multiple tabs apart,
// this callback is called for each intermediate page, but each of those pages
// will briefly register a sparsely decreasing range of positionOffsets, always
// from (1, 0). As such, you would notice the FAB to jump back and forth between
// x-positions as each intermediate page is scrolled through.
// This is a visual optimization that ends the translation motion, immediately
// returning the FAB to its target position.
// TODO: The animation visibly skips to the end. We could interpolate
// intermediate x-positions if we cared to smooth it out.
mFab.setTranslationX(0);
} else {
// Initially, the FAB's translationX property is zero because, at its original
// position, it is not translated. setTranslationX() is relative to the view's
// left position, at its original position; this left position is taken to be
// the zero point of the coordinate system relative to this view. As your
// translationX value is increasingly negative, the view is translated left.
// But as translationX is decreasingly negative and down to zero, the view
// is translated right, back to its original position.
float translationX = positionOffsetPixels / -2f;
// NOTE: You MUST scale your own additional pixel offsets by positionOffset,
// or else the FAB will immediately translate by that many pixels, appearing
// to skip/jump.
translationX += positionOffset * getFabPixelOffsetForXTranslation();
mFab.setTranslationX(translationX);
}
}
}
@Override
public void onPageSelected(int position) {
Log.d(TAG, "onPageSelected");
if (position < mSectionsPagerAdapter.getCount() - 1) {
mFab.setImageDrawable(mAddItemDrawable);
}
Fragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
// NOTE: This callback is fired after a rotation, right after onStart().
// Unfortunately, the FragmentManager handling the rotation has yet to
// tell our adapter to re-instantiate the Fragments, so our collection
// of fragments is empty. You MUST keep this check so we don't cause a NPE.
if (f instanceof BaseFragment) {
((BaseFragment) f).onPageSelected();
}
}
// @Override
// public void onPageScrollStateChanged(int state) {
// // TODO: This was not sufficient to prevent the user from quickly
// // hitting the fab for the previous page.
// switch (state) {
// case ViewPager.SCROLL_STATE_DRAGGING:
// if (mDraggingPastEndBoundaries) {
// return;
// }
// mScrollStateDragging = true;
// mPageDragging = mViewPager.getCurrentItem();
// mFab.hide();
// break;
// case ViewPager.SCROLL_STATE_SETTLING:
// if (!mScrollStateDragging) {
// mFab.hide();
// }
// mScrollStateDragging = false;
// // getCurrentItem() has changed to the target page we're settling on.
// // 200ms is the same as show/hide animation duration
// int targetPage = mViewPager.getCurrentItem();
// if (targetPage != 2) { // TODO: Use page constant
// int delay = mPageDragging == targetPage ? 0 : 200;
// mHandler.postDelayed(new Runnable() {
// @Override
// public void run() {
// mFab.show();
// }
// }, delay);
// }
// mPageDragging = -1;
// break;
// case ViewPager.SCROLL_STATE_IDLE:
// // Nothing
// break;
// }
// }
});
// mViewPager.setPageTransformer(false, new ViewPager.PageTransformer() {
// @Override
// public void transformPage(View page, float position) {
// Log.d(TAG, "position: " + position);
// // position represents a page's offset from the front-and-center position of 0 (the page
// // that is in full view). Consider pages A, B, C, D.
// // If we are now on page A (position 0), then pages B, C, and D are respectively
// // in positions 1, 2, 3.
// // If we move to the right to page B (now in position 0), then pages A, C, D are
// // respectively in positions -1, 1, 2.
// int currentPage = mViewPager.getCurrentItem();
// // TODO: Use page constants
// // Page 0 can't move one full page position to the right (i.e. there is no page to
// // the left of page 0 that can adopt the front-and-center position of 0 while page 0
// // moves to adopt position 1)
// mDraggingPastEndBoundaries = currentPage == 0 && position >= 0f
// // The last page can't move one full page position to the left (i.e. there
// // is no page to the right of the last page that can adopt the front-and-center
// // position of 0 while the last page moves to adopt position -1)
// || currentPage == mSectionsPagerAdapter.getCount() - 1 && position <= 0f;
// Log.d(TAG, "Draggin past end bounds: " + mDraggingPastEndBoundaries);
// }
// });
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
@ -90,13 +220,15 @@ public class MainActivity extends BaseActivity {
mFab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
BaseFragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
Fragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
if (f instanceof RecyclerViewFragment) {
((RecyclerViewFragment) f).onFabClick();
}
}
});
mAddItemDrawable = ContextCompat.getDrawable(this, R.drawable.ic_add_24dp);
final int initialPage = getIntent().getIntExtra(EXTRA_SHOW_PAGE, -1);
if (initialPage >= 0 && initialPage <= mSectionsPagerAdapter.getCount() - 1) {
// This is so we don't keep it around when the configuration changes.
@ -112,15 +244,6 @@ public class MainActivity extends BaseActivity {
}
});
}
final String key = getString(R.string.key_last_tab);
final int fromPrefsLastTab = PreferenceManager.getDefaultSharedPreferences(this).getInt(key, DEFAULT_TAB);
restoreTab(savedInstanceState, fromPrefsLastTab);
}
private void restoreTab(final Bundle savedInstanceState, int def) {
final int tabToSwitchTo = savedInstanceState == null ?
def : savedInstanceState.getInt(LAST_TAB, def);
mViewPager.setCurrentItem(tabToSwitchTo);
}
@Override
@ -161,42 +284,15 @@ public class MainActivity extends BaseActivity {
// http://stackoverflow.com/a/24303360/5055032
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_THEME_CHANGE
&& data != null && data.getBooleanExtra(SettingsActivity.EXTRA_THEME_CHANGED, false)) {
recreate();
switch (requestCode) {
case REQUEST_THEME_CHANGE:
if (data != null && data.getBooleanExtra(SettingsActivity.EXTRA_THEME_CHANGED, false)) {
recreate();
}
break;
}
}
@Override
public void onSaveInstanceState(final Bundle outState, final PersistableBundle outPersistentState) {
super.onSaveInstanceState(outState, outPersistentState);
outState.putInt(LAST_TAB, mViewPager.getCurrentItem());
}
@Override
protected void onRestoreInstanceState(final Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
restoreTab(savedInstanceState, DEFAULT_TAB);
}
@Override
protected void onStart() {
super.onStart();
mViewPager.addOnPageChangeListener(mModifyFabPositionListener);
}
@Override
protected void onStop() {
super.onStop();
mViewPager.removeOnPageChangeListener(mModifyFabPositionListener);
}
@Override
protected void onDestroy() {
super.onDestroy();
this.mModifyFabPositionListener = null;
}
@Override
protected int layoutResId() {
return R.layout.activity_main;
@ -233,11 +329,11 @@ public class MainActivity extends BaseActivity {
* relative to its center position. An X-translation normally is done relative to a view's
* left position.
*/
private static float getFabPixelOffsetForXTranslation(FloatingActionButton fab) {
private float getFabPixelOffsetForXTranslation() {
final int margin;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
// Since each side's margin is the same, any side's would do.
margin = ((ViewGroup.MarginLayoutParams) fab.getLayoutParams()).rightMargin;
margin = ((ViewGroup.MarginLayoutParams) mFab.getLayoutParams()).rightMargin;
} else {
// Pre-Lollipop has measurement issues with FAB margins. This is
// probably as good as we can get to centering the FAB, without
@ -247,7 +343,7 @@ public class MainActivity extends BaseActivity {
// X-translation is done relative to a view's left position; by adding
// an offset of half the FAB's width, we effectively rebase the translation
// relative to the view's center position.
return fab.getWidth() / 2f + margin;
return mFab.getWidth() / 2f + margin;
}
/**
@ -258,30 +354,30 @@ public class MainActivity extends BaseActivity {
// We can't use an ArrayList because the structure reorganizes as elements are removed,
// so page indices won't stay in sync with list indices. SparseArray allows you to have
// gaps in your range of indices.
private final SparseArray<BaseFragment> mFragments = new SparseArray<>(getCount());
private final SparseArray<Fragment> mFragments = new SparseArray<>(getCount());
private SectionsPagerAdapter(FragmentManager fm) {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public BaseFragment getItem(int position) {
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
switch (position) {
case PAGE_ALARMS:
return AlarmsFragment.newInstance(1);
case PAGE_TIMERS:
return new TimersFragment();
case PAGE_STOPWATCH:
return new StopwatchFragment();
default:
throw new IllegalStateException("No fragment can be instantiated for position " + position);
case PAGE_ALARMS:
return AlarmsFragment.newInstance(1);
case PAGE_TIMERS:
return new TimersFragment();
case PAGE_STOPWATCH:
return new StopwatchFragment();
default:
throw new IllegalStateException("No fragment can be instantiated for position " + position);
}
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
BaseFragment fragment = (BaseFragment) super.instantiateItem(container, position);
Fragment fragment = (Fragment) super.instantiateItem(container, position);
mFragments.put(position, fragment);
return fragment;
}
@ -298,86 +394,22 @@ public class MainActivity extends BaseActivity {
return 3;
}
BaseFragment getFragment(int position) {
// TODO: If you wish to have text labels for your tabs, then implement this method.
// @Override
// public CharSequence getPageTitle(int position) {
// switch (position) {
// case 0:
// return "SECTION 1";
// case 1:
// return "SECTION 2";
// case 2:
// return "SECTION 3";
// }
// return null;
// }
public Fragment getFragment(int position) {
return mFragments.get(position);
}
}
private static final class ModifyOffsetOnPageChangeListener extends ViewPager.SimpleOnPageChangeListener {
private final FloatingActionButton mFab;
private final SectionsPagerAdapter mSectionsPagerAdapter;
private final ViewPager mViewPager;
private ModifyOffsetOnPageChangeListener(final FloatingActionButton mFab,
final SectionsPagerAdapter mSectionsPagerAdapter,
final ViewPager mViewPager) {
this.mFab = mFab;
this.mSectionsPagerAdapter = mSectionsPagerAdapter;
this.mViewPager = mViewPager;
}
/**
* @param position Either the current page position if the offset is increasing,
* or the previous page position if it is decreasing.
* @param positionOffset If increasing from [0, 1), scrolling right and position = currentPagePosition
* If decreasing from (1, 0], scrolling left and position = (currentPagePosition - 1)
*/
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
Log.d(TAG, String.format("pos = %d, posOffset = %f, posOffsetPixels = %d",
position, positionOffset, positionOffsetPixels));
int pageBeforeLast = mSectionsPagerAdapter.getCount() - 2;
if (position <= pageBeforeLast) {
if (position < pageBeforeLast) {
// When the scrolling is due to tab selection between multiple tabs apart,
// this callback is called for each intermediate page, but each of those pages
// will briefly register a sparsely decreasing range of positionOffsets, always
// from (1, 0). As such, you would notice the FAB to jump back and forth between
// x-positions as each intermediate page is scrolled through.
// This is a visual optimization that ends the translation motion, immediately
// returning the FAB to its target position.
// TODO: The animation visibly skips to the end. We could interpolate
// intermediate x-positions if we cared to smooth it out.
mFab.setTranslationX(0);
} else {
// Initially, the FAB's translationX property is zero because, at its original
// position, it is not translated. setTranslationX() is relative to the view's
// left position, at its original position; this left position is taken to be
// the zero point of the coordinate system relative to this view. As your
// translationX value is increasingly negative, the view is translated left.
// But as translationX is decreasingly negative and down to zero, the view
// is translated right, back to its original position.
float translationX = positionOffsetPixels / -2f;
// NOTE: You MUST scale your own additional pixel offsets by positionOffset,
// or else the FAB will immediately translate by that many pixels, appearing
// to skip/jump.
translationX += positionOffset * getFabPixelOffsetForXTranslation(mFab);
mFab.setTranslationX(translationX);
}
}
}
@Override
public void onPageSelected(int position) {
Log.d(TAG, "onPageSelected");
if (position < mSectionsPagerAdapter.getCount() - 1) {
mFab.setImageResource(R.drawable.ic_add_24dp);
}
BaseFragment f = mSectionsPagerAdapter.getFragment(mViewPager.getCurrentItem());
// NOTE: This callback is fired after a rotation, right after onStart().
// Unfortunately, the FragmentManager handling the rotation has yet to
// tell our adapter to re-instantiate the Fragments, so our collection
// of fragments is empty. You MUST keep this check so we don't cause a NPE.
if (f != null) {
f.onPageSelected();
}
final int currentTab = mViewPager.getCurrentItem();
PreferenceManager.getDefaultSharedPreferences(mViewPager.getContext())
.edit()
.putInt(LAST_TAB, currentTab)
.commit();
}
}
}