Java tutorial
/* * Copyright (c) 2016. Matsuda, Akihit (akihito104) * * 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.freshdigitable.udonroad; import android.content.Context; import android.content.ContextWrapper; import android.content.Intent; import android.databinding.DataBindingUtil; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.Toast; import com.freshdigitable.udonroad.UserAction.Resource; import com.freshdigitable.udonroad.databinding.ActivityMediaViewBinding; import com.freshdigitable.udonroad.datastore.MediaCache; import com.freshdigitable.udonroad.datastore.TypedCache; import com.freshdigitable.udonroad.ffab.OnFlingListener.Direction; import com.freshdigitable.udonroad.module.InjectionUtil; import com.freshdigitable.udonroad.subscriber.StatusRequestWorker; import com.freshdigitable.udonroad.subscriber.UserFeedbackSubscriber; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import javax.inject.Inject; import rx.Observable; import twitter4j.ExtendedMediaEntity; import twitter4j.Status; /** * MediaViewActivity shows picture or video in Status. * * Created by akihit on 2016/07/12. */ public class MediaViewActivity extends AppCompatActivity implements View.OnClickListener { @SuppressWarnings("unused") private static final String TAG = MediaViewActivity.class.getSimpleName(); private static final String CREATE_STATUS = "status"; private static final String CREATE_START = "start"; private ActivityMediaViewBinding binding; private Handler handler; @Inject StatusRequestWorker<TypedCache<Status>> userActionSubscriber; private Map<Direction, UserAction> actionMap = new HashMap<>(); @Inject UserFeedbackSubscriber userFeedback; public static Intent create(@NonNull Context context, @NonNull Status status) { return create(context, status, 0); } public static Intent create(@NonNull Context context, @NonNull Status status, int startPage) { final Status bindingStatus = StatusViewImageHelper.getBindingStatus(status); if (bindingStatus.getExtendedMediaEntities().length < startPage + 1) { throw new IllegalArgumentException( "startPage number exceeded ExtendedMediaEntities length: " + startPage); } Intent intent = new Intent(context, MediaViewActivity.class); intent.putExtra(CREATE_STATUS, status.getId()); intent.putExtra(CREATE_START, startPage); return intent; } public static void start(@NonNull Context context, @NonNull Status status, int startPage) { final Intent intent = create(context, status, startPage); context.startActivity(intent); } @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); showSystemUI(); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); binding = DataBindingUtil.setContentView(this, R.layout.activity_media_view); InjectionUtil.getComponent(this).inject(this); ViewCompat.setElevation(binding.mediaToolbar, getResources().getDimensionPixelOffset(R.dimen.action_bar_elevation)); setSupportActionBar(binding.mediaToolbar); handler = new Handler(); final ActionBar actionBar = getSupportActionBar(); getWindow().getDecorView() .setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() { @Override public void onSystemUiVisibilityChange(int visibility) { Log.d(TAG, "onSystemUiVisibilityChange: " + visibility); if (isSystemUIVisible(visibility)) { if (actionBar != null) { setTitle(); actionBar.show(); binding.mediaIffab.show(); } binding.mediaIffab.show(); } else { if (actionBar != null) { actionBar.hide(); } binding.mediaIffab.hide(); } } }); } private boolean isSystemUIVisible() { return isSystemUIVisible(getWindow().getDecorView().getSystemUiVisibility()); } private boolean isSystemUIVisible(int visibility) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { return (View.SYSTEM_UI_FLAG_FULLSCREEN & visibility) == 0; } else { return (View.SYSTEM_UI_FLAG_HIDE_NAVIGATION & visibility) == 0; } } private void showSystemUI() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); } } private void hideSystemUI() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { getWindow().getDecorView().setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar | View.SYSTEM_UI_FLAG_IMMERSIVE); } else { getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar ); } } private void setTitle() { final int all = binding.mediaPager.getAdapter().getCount(); final int currentItem = binding.mediaPager.getCurrentItem() + 1; setTitle(currentItem + " / " + all); } private final ViewPager.OnPageChangeListener pageChangeListener = new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { super.onPageSelected(position); setTitle(); } }; @Override protected void onStart() { super.onStart(); userActionSubscriber.open(); userFeedback.setToastOption(Gravity.CENTER, 0, 0); final Intent intent = getIntent(); final long statusId = intent.getLongExtra(CREATE_STATUS, -1); final TypedCache<Status> statusCache = userActionSubscriber.getCache(); final Status status = statusCache.find(statusId); if (status == null) { Toast.makeText(getApplicationContext(), "status is not found", Toast.LENGTH_SHORT).show(); return; } final Status bindingStatus = StatusViewImageHelper.getBindingStatus(status); final int startPage = intent.getIntExtra(CREATE_START, 0); binding.mediaPager.setAdapter( new MediaPagerAdapter(getSupportFragmentManager(), bindingStatus.getExtendedMediaEntities())); binding.mediaPager.addOnPageChangeListener(pageChangeListener); binding.mediaPager.setCurrentItem(startPage); setTitle(); setupActionMap(statusId); UserAction.setupFlingableFAB(binding.mediaIffab, actionMap, getApplicationContext()); } @Override protected void onStop() { handler.removeCallbacksAndMessages(null); getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(null); binding.mediaPager.removeOnPageChangeListener(pageChangeListener); binding.mediaPager.setAdapter(null); binding.mediaIffab.setOnFlingListener(null); actionMap.clear(); userActionSubscriber.close(); super.onStop(); } private final Runnable hideSystemUITask = new Runnable() { @Override public void run() { Log.d(TAG, "handler.postDelayed: "); hideSystemUI(); } }; @Override public void onWindowFocusChanged(boolean hasFocus) { Log.d(TAG, "onWindowFocusChanged: " + Boolean.toString(hasFocus)); super.onWindowFocusChanged(hasFocus); if (hasFocus) { handler.postDelayed(hideSystemUITask, 1000); } } @Override public void onClick(View view) { Log.d(TAG, "onClick: page"); if (isSystemUIVisible()) { hideSystemUI(); } else { showSystemUI(); } } private static class MediaPagerAdapter extends FragmentPagerAdapter { private ExtendedMediaEntity[] mediaEntities; MediaPagerAdapter(FragmentManager fm, ExtendedMediaEntity[] mediaEntities) { super(fm); this.mediaEntities = mediaEntities; } @Override public Fragment getItem(int position) { return MediaFragment.create(mediaEntities[position]); } @Override public int getCount() { return mediaEntities.length; } } public static abstract class MediaFragment extends Fragment { private static MediaFragment create(ExtendedMediaEntity mediaEntity) { final MediaFragment fragment; final String type = mediaEntity.getType(); if ("photo".equals(type)) { fragment = new PhotoMediaFragment(); } else { // video and animated_gif are distributed as a mp4 fragment = new VideoMediaFragment(); } final Bundle args = new Bundle(); args.putLong("media_id", mediaEntity.getId()); fragment.setArguments(args); return fragment; } protected ExtendedMediaEntity mediaEntity; protected View.OnClickListener pageClickListener; @Inject MediaCache mediaCache; @Override public void onAttach(Context context) { super.onAttach(context); InjectionUtil.getComponent(this).inject(this); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { if (container != null) { container.setBackgroundColor(Color.BLACK); } final FragmentActivity activity = getActivity(); if (activity instanceof View.OnClickListener) { pageClickListener = (View.OnClickListener) activity; } return super.onCreateView(inflater, container, savedInstanceState); } @Override public void onStart() { super.onStart(); mediaCache.open(); final long mediaId = getArguments().getLong("media_id"); mediaEntity = mediaCache.getMediaEntity(mediaId); } @Override public void onStop() { super.onStop(); mediaCache.close(); } protected final View.OnTouchListener touchListener = new View.OnTouchListener() { final double LOWER_THRESHOLD = (90 - 10) * Math.PI / 180; final double UPPER_THRESHOLD = (90 + 10) * Math.PI / 180; private MotionEvent old; @Override public boolean onTouch(View view, MotionEvent now) { final int action = now.getAction(); if (action == MotionEvent.ACTION_DOWN) { old = MotionEvent.obtain(now); return false; } if (action == MotionEvent.ACTION_UP) { try { final float deltaX = now.getX() - old.getX(); final float deltaY = now.getY() - old.getY(); final double powDist = deltaX * deltaX + deltaY * deltaY; if (powDist < 100) { // maybe click // Log.d(TAG, "onTouch: click: " + powDist); return false; } final double rad = Math.atan2(deltaY, deltaX); final double absRad = Math.abs(rad); if (absRad > LOWER_THRESHOLD || absRad < UPPER_THRESHOLD) { // maybe swipe to longitude return true; } } finally { old.recycle(); } } return false; } }; } @Override protected void attachBaseContext(Context newBase) { super.attachBaseContext(new ContextWrapperImpl(newBase)); } private static class ContextWrapperImpl extends ContextWrapper { public ContextWrapperImpl(Context base) { super(base); } @Override public Object getSystemService(String name) { if (Context.AUDIO_SERVICE.equals(name)) { return getApplicationContext().getSystemService(name); } if (Context.CAPTIONING_SERVICE.equals(name)) { return getApplicationContext().getSystemService(name); } return super.getSystemService(name); } } private void setupActionMap(final long statusId) { actionMap.put(Direction.UP, new UserAction(Resource.FAV, new Runnable() { @Override public void run() { userActionSubscriber.createFavorite(statusId); } })); actionMap.put(Direction.RIGHT, new UserAction(Resource.RETWEET, new Runnable() { @Override public void run() { userActionSubscriber.retweetStatus(statusId); } })); actionMap.put(Direction.UP_RIGHT, new UserAction(null, new Runnable() { @Override public void run() { Observable .concatDelayError(Arrays.asList(userActionSubscriber.observeCreateFavorite(statusId), userActionSubscriber.observeRetweetStatus(statusId))) .subscribe(StatusRequestWorker.<Status>nopSubscriber()); } })); } }