Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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.misterpereira.android.kiteplayer.ui; import android.app.ActivityOptions; import android.app.FragmentManager; import android.content.Intent; import android.content.res.Configuration; import android.os.Bundle; import android.os.Handler; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.app.MediaRouteButton; import android.support.v7.media.MediaRouter; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import com.dropbox.client2.DropboxAPI; import com.dropbox.client2.android.AndroidAuthSession; import com.dropbox.client2.exception.DropboxException; import com.github.amlcurran.showcaseview.ShowcaseView; import com.github.amlcurran.showcaseview.targets.ViewTarget; import com.google.android.libraries.cast.companionlibrary.cast.VideoCastManager; import com.google.android.libraries.cast.companionlibrary.cast.callbacks.VideoCastConsumerImpl; import com.misterpereira.android.kiteplayer.KiteApplication; import com.misterpereira.android.kiteplayer.R; import com.misterpereira.android.kiteplayer.utils.DropboxHelper; import com.misterpereira.android.kiteplayer.utils.LogHelper; import com.misterpereira.android.kiteplayer.utils.NetworkHelper; import com.misterpereira.android.kiteplayer.utils.PrefUtils; import com.misterpereira.android.kiteplayer.utils.ResourceHelper; import javax.inject.Inject; import rx.android.schedulers.AndroidSchedulers; import rx.exceptions.OnErrorThrowable; import rx.schedulers.Schedulers; import rx.util.async.Async; /** * Abstract activity with toolbar, navigation drawer and cast support. Needs to be extended by * any activity that wants to be shown as a top level activity. * * The requirements for a subclass is to call {@link #initializeToolbar()} on onCreate, after * setContentView() is called and have three mandatory layout elements: * a {@link android.support.v7.widget.Toolbar} with id 'toolbar', * a {@link android.support.v4.widget.DrawerLayout} with id 'drawerLayout' and * a {@link android.widget.ListView} with id 'drawerList'. */ public abstract class ActionBarCastActivity extends AppCompatActivity { private static final String TAG = LogHelper.makeLogTag(ActionBarCastActivity.class); private static final int DELAY_MILLIS = 1000; private VideoCastManager mCastManager; private MenuItem mMediaRouteMenuItem; private Toolbar mToolbar; private ActionBarDrawerToggle mDrawerToggle; private DrawerLayout mDrawerLayout; private ListView mDrawerList; private DrawerMenuContents mDrawerMenuContents; private boolean mToolbarInitialized; private int mItemToOpenWhenDrawerCloses = -1; @Inject DropboxAPI<AndroidAuthSession> mDBApi; private final VideoCastConsumerImpl mCastConsumer = new VideoCastConsumerImpl() { @Override public void onFailed(int resourceId, int statusCode) { LogHelper.d(TAG, "onFailed ", resourceId, " status ", statusCode); } @Override public void onConnectionSuspended(int cause) { LogHelper.d(TAG, "onConnectionSuspended() was called with cause: ", cause); } @Override public void onConnectivityRecovered() { } @Override public void onCastDeviceDetected(final MediaRouter.RouteInfo info) { // FTU stands for First Time Use: if (!PrefUtils.isFtuShown(ActionBarCastActivity.this)) { // If user is seeing the cast button for the first time, we will // show an overlay that explains what that button means. PrefUtils.setFtuShown(ActionBarCastActivity.this, true); LogHelper.d(TAG, "Route is visible: ", info); new Handler().postDelayed(new Runnable() { @Override public void run() { if (mMediaRouteMenuItem.isVisible()) { LogHelper.d(TAG, "Cast Icon is visible: ", info.getName()); showFtu(); } } }, DELAY_MILLIS); } } }; private final DrawerLayout.DrawerListener mDrawerListener = new DrawerLayout.DrawerListener() { @Override public void onDrawerClosed(View drawerView) { if (mDrawerToggle != null) mDrawerToggle.onDrawerClosed(drawerView); int position = mItemToOpenWhenDrawerCloses; if (position >= 0 && position < mDrawerMenuContents.getItems().size()) { mDrawerMenuContents.getActivity(position).run(); } } @Override public void onDrawerStateChanged(int newState) { if (mDrawerToggle != null) mDrawerToggle.onDrawerStateChanged(newState); } @Override public void onDrawerSlide(View drawerView, float slideOffset) { if (mDrawerToggle != null) mDrawerToggle.onDrawerSlide(drawerView, slideOffset); } @Override public void onDrawerOpened(View drawerView) { if (mDrawerToggle != null) mDrawerToggle.onDrawerOpened(drawerView); if (getSupportActionBar() != null) getSupportActionBar().setTitle(R.string.app_name); } }; private final FragmentManager.OnBackStackChangedListener mBackStackChangedListener = this::updateDrawerToggle; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LogHelper.d(TAG, "Activity onCreate"); // Dependency Injection ((KiteApplication) getApplication()).getComponent().inject(this); if (NetworkHelper.isOnline(this) && DropboxHelper.isUnlinked(mDBApi.getSession())) { reAuthenticate(); } // Ensure that Google Play Service is available. VideoCastManager.checkGooglePlayServices(this); mCastManager = VideoCastManager.getInstance(); mCastManager.reconnectSessionIfPossible(); } @Override protected void onStart() { super.onStart(); if (!mToolbarInitialized) { throw new IllegalStateException( "You must run super.initializeToolbar at " + "the end of your onCreate method"); } } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); if (mDrawerToggle != null) { mDrawerToggle.syncState(); } } @Override public void onResume() { super.onResume(); mCastManager.addVideoCastConsumer(mCastConsumer); mCastManager.incrementUiCounter(); // Whenever the fragment back stack changes, we may need to update the // action bar toggle: only top level screens show the hamburger-like icon, inner // screens - either Activities or fragments - show the "Up" icon instead. getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (mDrawerToggle != null) { mDrawerToggle.onConfigurationChanged(newConfig); } } @Override public void onPause() { super.onPause(); mCastManager.removeVideoCastConsumer(mCastConsumer); mCastManager.decrementUiCounter(); getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.main, menu); mMediaRouteMenuItem = mCastManager.addMediaRouterButton(menu, R.id.media_route_menu_item); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (mDrawerToggle != null && mDrawerToggle.onOptionsItemSelected(item)) { return true; } // If not handled by drawerToggle, home needs to be handled by returning to previous if (item != null && item.getItemId() == android.R.id.home) { onBackPressed(); return true; } return super.onOptionsItemSelected(item); } @Override public void onBackPressed() { // If the drawer is open, back will closeQuietly it if (mDrawerLayout != null && mDrawerLayout.isDrawerOpen(GravityCompat.START)) { mDrawerLayout.closeDrawers(); return; } // Otherwise, it may return to the previous fragment stack FragmentManager fragmentManager = getFragmentManager(); if (fragmentManager.getBackStackEntryCount() > 0) { fragmentManager.popBackStack(); } else { // Lastly, it will rely on the system behavior for back super.onBackPressed(); } } @Override public void setTitle(CharSequence title) { super.setTitle(title); mToolbar.setTitle(title); } @Override public void setTitle(int titleId) { super.setTitle(titleId); mToolbar.setTitle(titleId); } protected void initializeToolbar() { mToolbar = (Toolbar) findViewById(R.id.toolbar); if (mToolbar == null) { throw new IllegalStateException("Layout is required to include a Toolbar with id " + "'toolbar'"); } mToolbar.inflateMenu(R.menu.main); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); if (mDrawerLayout != null) { mDrawerList = (ListView) findViewById(R.id.drawer_list); if (mDrawerList == null) { throw new IllegalStateException( "A layout with a drawerLayout is required to" + "include a ListView with id 'drawerList'"); } // Create an ActionBarDrawerToggle that will handle opening/closing of the drawer: mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar, R.string.open_content_drawer, R.string.close_content_drawer); mDrawerLayout.setDrawerListener(mDrawerListener); mDrawerLayout.setStatusBarBackgroundColor( ResourceHelper.getThemeColor(this, R.attr.colorPrimary, android.R.color.black)); Async.start(() -> { try { return mDBApi.accountInfo(); } catch (DropboxException e) { DropboxHelper.unlinkSessionIfUnlinkedException(mDBApi.getSession(), e); throw OnErrorThrowable.from(e); } }).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(dbAccount -> { if (dbAccount != null) { ((TextView) findViewById(R.id.drawer_user_initial)) .setText(dbAccount.displayName.substring(0, 1)); ((TextView) findViewById(R.id.drawer_user_name)).setText(dbAccount.displayName); ((TextView) findViewById(R.id.drawer_user_email)).setText(dbAccount.email); } }, error -> { if (DropboxHelper.isUnlinked(mDBApi.getSession())) { reAuthenticate(); } LogHelper.e(TAG, error, "initializeToolbar - Unable to obtain user data for drawer header."); }); populateDrawerItems(); setSupportActionBar(mToolbar); updateDrawerToggle(); } else { setSupportActionBar(mToolbar); } mToolbarInitialized = true; } private void populateDrawerItems() { mDrawerMenuContents = new DrawerMenuContents(this, mDBApi); final int selectedPosition = mDrawerMenuContents.getPosition(this.getClass()); SimpleAdapter adapter = new SimpleAdapter(this, mDrawerMenuContents.getItems(), R.layout.drawer_list_item, new String[] { DrawerMenuContents.FIELD_TITLE, DrawerMenuContents.FIELD_ICON }, new int[] { R.id.drawer_item_title, R.id.drawer_item_icon }); mDrawerList.setOnItemClickListener((parent, view, position, id) -> { if (position != selectedPosition) { mItemToOpenWhenDrawerCloses = position; } mDrawerList.setItemChecked(position, true); mDrawerLayout.closeDrawers(); }); mDrawerList.setAdapter(adapter); mDrawerList.post(() -> mDrawerList.setItemChecked(selectedPosition, true)); } protected void updateDrawerToggle() { if (mDrawerToggle == null) { return; } boolean isRoot = getFragmentManager().getBackStackEntryCount() == 0; mDrawerToggle.setDrawerIndicatorEnabled(isRoot); if (getSupportActionBar() != null) { getSupportActionBar().setDisplayShowHomeEnabled(!isRoot); getSupportActionBar().setDisplayHomeAsUpEnabled(!isRoot); getSupportActionBar().setHomeButtonEnabled(!isRoot); } if (isRoot) { mDrawerToggle.syncState(); } } /** * Shows the Cast First Time User experience to the user (an overlay that explains what is * the Cast icon) */ private void showFtu() { Menu menu = mToolbar.getMenu(); View view = menu.findItem(R.id.media_route_menu_item).getActionView(); if (view != null && view instanceof MediaRouteButton) { new ShowcaseView.Builder(this).setTarget(new ViewTarget(view)).setContentTitle(R.string.touch_to_cast) .hideOnTouchOutside().build(); } } protected void reAuthenticate() { Intent i = new Intent(this, AuthActivity.class); Bundle extras = ActivityOptions.makeCustomAnimation(this, R.anim.fade_in, R.anim.fade_out).toBundle(); startActivity(i, extras); finish(); } }