Java tutorial
/* * Copyright (C) 2013 Chris Lacy * * 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.tweetlanes.android.view; import java.util.ArrayList; import android.app.ActionBar; import android.app.ActionBar.OnNavigationListener; import android.app.AlertDialog; import android.app.Dialog; import android.content.ComponentName; import android.content.ContentResolver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.ServiceConnection; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.provider.MediaStore.Images; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.PagerAdapter; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.WindowManager; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.SpinnerAdapter; import android.widget.Toast; import android.widget.ViewSwitcher; import com.tweetlanes.android.Constant; import com.tweetlanes.android.R; import com.tweetlanes.android.App; import com.tweetlanes.android.model.AccountDescriptor; import com.tweetlanes.android.model.LaneDescriptor; import org.tweetalib.android.TwitterFetchLists.FinishedCallback; import org.tweetalib.android.TwitterFetchResult; import org.tweetalib.android.TwitterFetchUsers; import org.tweetalib.android.model.TwitterLists; import org.tweetalib.android.model.TwitterStatus; import org.tweetalib.android.model.TwitterStatusUpdate; import org.tweetalib.android.model.TwitterUsers; import org.tweetalib.android.TwitterManager; import com.tweetlanes.android.service.BackgroundService; import com.tweetlanes.android.view.SettingsActivity; import com.tweetlanes.android.widget.viewpagerindicator.TitleProvider; public class HomeActivity extends BaseLaneActivity { HomeLaneAdapter mHomeLaneAdapter; String[] mAdapterStrings; SpinnerAdapter mSpinnerAdapter; ViewSwitcher mViewSwitcher; FinishedCallback mFetchListsCallback; private OnNavigationListener mOnNavigationListener; /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#onCreate(android.os.Bundle) */ @Override protected void onCreate(Bundle savedInstanceState) { //StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().penaltyDialog().build()); //StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build()); //StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll().penaltyLog().build()); super.onCreate(savedInstanceState); AccountDescriptor account = getApp().getCurrentAccount(); // Attempt at fixing a crash found in HomeActivity if (account == null) { Toast.makeText(getApplicationContext(), "No cached account found, restarting", Constant.DEFAULT_TOAST_DISPLAY_TIME).show(); restartApp(); return; } ActionBar actionBar = getActionBar(); actionBar.setDisplayUseLogoEnabled(true); actionBar.setTitle(null); actionBar.setDisplayShowTitleEnabled(false); ArrayList<String> adapterList = new ArrayList<String>(); ArrayList<AccountDescriptor> accounts = getApp().getAccounts(); for (int i = 0; i < accounts.size(); i++) { AccountDescriptor acc = accounts.get(i); adapterList.add("@" + acc.getScreenName()); } adapterList.add(getString(R.string.add_account)); mAdapterStrings = adapterList.toArray(new String[adapterList.size()]); mSpinnerAdapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_spinner_dropdown_item, mAdapterStrings); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); actionBar.setListNavigationCallbacks(mSpinnerAdapter, mOnNavigationListener); actionBar.setSelectedNavigationItem(0); onCreateNavigationListener(); configureListNavigation(); mViewSwitcher = (ViewSwitcher) findViewById(R.id.rootViewSwitcher); updateViewVisibility(); onCreateHandleIntents(); account.setDisplayedLaneDefinitionsDirty(false); configureNotificationService(); } /* * */ void onCreateHandleIntents() { boolean turnSoftKeyboardOff = true; Intent intent = getIntent(); if (intent.getAction() == Intent.ACTION_SEND) { Bundle extras = intent.getExtras(); String type = intent.getType(); if (type.equals("text/plain") == true) { String shareString = extras.getString(Intent.EXTRA_TEXT); if (extras.containsKey(Intent.EXTRA_TEXT)) { shareString = extras.getString(Intent.EXTRA_SUBJECT) + " " + shareString; } beginShareStatus(shareString); turnSoftKeyboardOff = false; } else if (type.contains("image/")) { // From http://stackoverflow.com/a/2641363/328679 if (extras.containsKey(Intent.EXTRA_STREAM)) { Uri uri = (Uri) extras.getParcelable(Intent.EXTRA_STREAM); String scheme = uri.getScheme(); if (scheme.equals("content")) { ContentResolver contentResolver = getContentResolver(); Cursor cursor = contentResolver.query(uri, null, null, null, null); cursor.moveToFirst(); try { String imagePath = cursor.getString(cursor.getColumnIndexOrThrow(Images.Media.DATA)); beginShareImage(imagePath); } catch (java.lang.IllegalArgumentException e) { Toast.makeText(this, R.string.picture_attach_error, Toast.LENGTH_SHORT).show(); } turnSoftKeyboardOff = false; } } } } if (turnSoftKeyboardOff == true) { // Turn the soft-keyboard off. For some reason it wants to appear on screen by default when coming back from multitasking... getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); } } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#onResume() */ @Override protected void onResume() { super.onResume(); AccountDescriptor account = getApp().getCurrentAccount(); if (account.getDisplayedLaneDefinitionsDirty()) { onLaneDataSetChanged(); account.setDisplayedLaneDefinitionsDirty(false); } if (account.shouldRefreshLists() == true) { mRefreshListsHandler.removeCallbacks(mRefreshListsTask); mRefreshListsHandler.postDelayed(mRefreshListsTask, Constant.REFRESH_LISTS_WAIT_TIME); } if (isComposing() == false) { // Check we are using List navigation on the ActionBar. This will not be the case when ComposeTweet is present. if (getActionBar().getNavigationMode() == android.app.ActionBar.NAVIGATION_MODE_LIST) { /* Integer accountIndex = mSpinnerAdapter.getIndexOfAccount(getApp().getCurrentAccount()); if (accountIndex != null) { getActionBar().setSelectedNavigationItem(accountIndex); }*/ } } } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#onPause() */ @Override protected void onPause() { super.onPause(); App app = getApp(); app.saveUpdatedAccountDescriptor(app.getCurrentAccount()); saveData(getCurrentLaneIndex()); mRefreshListsHandler.removeCallbacks(mRefreshListsTask); } /* * (non-Javadoc) * @see android.support.v4.app.FragmentActivity#onDestroy() */ @Override protected void onDestroy() { mHomeLaneAdapter = null; try { doUnbindService(); } catch (Throwable t) { Log.e("HomeActivity", "Failed to unbind from the service", t); } super.onDestroy(); } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#getInitialLaneIndex() */ @Override protected int getInitialLaneIndex() { return getApp().getCurrentAccount().getInitialLaneIndex(); } /* * */ @Override String getCachedData(int laneIndex) { if (Constant.ENABLE_STATUS_CACHING == true) { AccountDescriptor account = getApp().getCurrentAccount(); LaneDescriptor laneDescriptor = account.getDisplayedLaneDefinition(laneIndex); if (laneDescriptor != null) { String cacheKey = laneDescriptor.getCacheKey(account.getScreenName()); String cachedData = getApp().getCachedData(cacheKey); if (cachedData != null) { return cachedData; } } } return null; } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#getAdapterForViewPager() */ @Override protected PagerAdapter getAdapterForViewPager() { if (mHomeLaneAdapter == null) { mHomeLaneAdapter = new HomeLaneAdapter(getSupportFragmentManager()); } return mHomeLaneAdapter; } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#getFragmentStatePagerAdapter() */ @Override protected FragmentStatePagerAdapter getFragmentStatePagerAdapter() { return mHomeLaneAdapter; } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#onLaneChange(int) */ @Override protected void onLaneChange(final int position, final int oldPosition) { super.onLaneChange(position, oldPosition); getApp().getCurrentAccount().setCurrentLaneIndex(position); saveData(oldPosition); } /* * */ private void saveData(final int position) { final App app = getApp(); new Thread(new Runnable() { public void run() { if (app != null) { AccountDescriptor account = app.getCurrentAccount(); BaseLaneFragment fragment = getFragmentAtIndex(position); final String toCache = fragment != null ? fragment.getDataToCache() : null; app.saveUpdatedAccountDescriptor(account); if (toCache != null) { LaneDescriptor laneDescriptor = account.getDisplayedLaneDefinition(position); final String cacheKey = laneDescriptor != null ? laneDescriptor.getCacheKey(account.getScreenName()) : null; if (cacheKey != null) { app.cacheData(cacheKey, toCache); } } } } }).start(); } /* * */ private void updateViewVisibility() { mViewSwitcher.reset(); mViewSwitcher.setDisplayedChild(1); } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#configureOptionsMenu(android.view.Menu) */ @Override public boolean configureOptionsMenu(Menu menu) { super.configureOptionsMenu(menu); return configureListNavigation(); } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#getDefaultOptionsMenu() */ @Override public Integer getDefaultOptionsMenu() { return R.menu.home_default_action_bar; } /* * (non-Javadoc) * @see com.tweetlanes.android.view.BaseLaneActivity#onOptionsItemSelected(android.view.MenuItem) */ @Override public boolean onOptionsItemSelected(MenuItem item) { if (super.onOptionsItemSelected(item) == true) { return true; } switch (item.getItemId()) { case R.id.action_settings: showUserPreferences(); break; case R.id.action_buy_alp: Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.chrislacy.actionlauncher.pro")); startActivity(browserIntent); break; /* case R.id.action_promote: showPromote(); break; */ /* case CHOOSE_LANES: Toast.makeText(getApplicationContext(), getString(R.string.functionality_not_implemented), Constant.DEFAULT_TOAST_DISPLAY_TIME).show(); break; */ /* case R.id.action_send_feedback: Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("plain/text"); String recipient[] = {"lacy@tweetlanes.com"}; intent.putExtra(Intent.EXTRA_EMAIL, recipient); intent.putExtra(Intent.EXTRA_SUBJECT, "Tweet Lanes Feedback"); //String userScreenName = getApp().getCurrentAccountScreenName(); //intent.putExtra(Intent.EXTRA_TEXT, userScreenName != null ? "(Feedback sent by @" + userScreenName : ""); startActivity(intent); break; */ default: return false; } return false; } /* * */ void onCreateNavigationListener() { mOnNavigationListener = new OnNavigationListener() { @Override public boolean onNavigationItemSelected(int position, long itemId) { if (position == mSpinnerAdapter.getCount() - 1) { showAddAccount(); } else { ArrayList<AccountDescriptor> accounts = getApp().getAccounts(); if (position < accounts.size()) { AccountDescriptor account = accounts.get(position); showAccount(account); } } return true; } }; } /* * */ private boolean configureListNavigation() { if (mSpinnerAdapter == null) { return false; } ActionBar actionBar = getActionBar(); actionBar.setNavigationMode(android.app.ActionBar.NAVIGATION_MODE_LIST); actionBar.setListNavigationCallbacks(mSpinnerAdapter, mOnNavigationListener); int accountIndex = 0; AccountDescriptor currentAccount = getApp().getCurrentAccount(); if (currentAccount != null) { String testScreenName = "@" + currentAccount.getScreenName().toLowerCase(); for (int i = 0; i < mAdapterStrings.length; i++) { if (testScreenName.equals(mAdapterStrings[i].toLowerCase())) { accountIndex = i; break; } } } actionBar.setSelectedNavigationItem(accountIndex); actionBar.setDisplayHomeAsUpEnabled(false); return true; } /* * */ private void showAccount(AccountDescriptor selectedAccount) { AccountDescriptor currentAccount = getApp().getCurrentAccount(); if (currentAccount == null || currentAccount.getId() != selectedAccount.getId()) { saveData(getCurrentLaneIndex()); clearFragmentsCache(); getApp().setCurrentAccount(selectedAccount.getId()); // From http://stackoverflow.com/a/3419987/328679 Intent intent = getIntent(); overridePendingTransition(0, 0); intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); finish(); overridePendingTransition(0, 0); startActivity(intent); } } /* * */ private void showAddAccount() { //Intent i = new Intent(getApplicationContext(), AddAccountActivity.class); Intent intent = new Intent(getApplicationContext(), TwitterAuthActivity.class); startActivity(intent); } /* * */ public void showUserPreferences() { startActivity(new Intent(this, SettingsActivity.class)); } /* * */ private void showFreeForLifeSuccess() { AlertDialog.Builder builder = new AlertDialog.Builder(HomeActivity.this); builder.setMessage(getString(R.string.free_for_life_success)); builder.setTitle(getString(R.string.success)); builder.setIcon(android.R.drawable.btn_star_big_on); builder.setPositiveButton("OK", new Dialog.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { } }); builder.create().show(); } /* * */ private void showFreeForLifeError() { AlertDialog.Builder builder = new AlertDialog.Builder(HomeActivity.this); builder.setMessage(getString(R.string.free_for_life_error)); builder.setIcon(0); builder.setPositiveButton("OK", new Dialog.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { } }); } /* * */ public void showPromote() { final View layout = View.inflate(this, R.layout.promote, null); //final EditText promoStatus = ((EditText) layout.findViewById(R.id.promoStatusEditText)); //promoStatus.setText(R.string.free_for_life_promo_status); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(0); builder.setPositiveButton("Agree!", new Dialog.OnClickListener() { public void onClick(DialogInterface dialog, int which) { TwitterFetchUsers.FinishedCallback callback = TwitterManager.get() .getFetchUsersInstance().new FinishedCallback() { @Override public void finished(TwitterFetchResult result, TwitterUsers users) { if (result.isSuccessful()) { String statusText = getString(R.string.promote_status_text); TwitterStatusUpdate statusUpdate = new TwitterStatusUpdate(statusText); TwitterManager.get().setStatus(statusUpdate, TwitterManager.get().getFetchStatusInstance().new FinishedCallback() { @Override public void finished(TwitterFetchResult result, TwitterStatus status) { if (result.isSuccessful()) { showFreeForLifeSuccess(); } else { showFreeForLifeError(); } } }); } } }; getApp().triggerFollowPromoAccounts(callback); } }); builder.setNegativeButton("Cancel", null); builder.setView(layout); builder.setTitle("Promote Tweet Lanes!"); AlertDialog alertDialog = builder.create(); alertDialog.show(); } /** * A call-back for when the user presses the back button. */ OnClickListener mBackListener = new OnClickListener() { public void onClick(View v) { finish(); } }; /* * Hanlder for refreshing a user's lists */ private Handler mRefreshListsHandler = new Handler(); private final Runnable mRefreshListsTask = new Runnable() { public void run() { mFetchListsCallback = TwitterManager.get().getFetchListsInstance().new FinishedCallback() { @Override public void finished(boolean successful, TwitterLists lists) { mFetchListsCallback = null; if (successful == true) { boolean modified = getApp().onUserListsRefresh(lists); if (modified == true) { onLaneDataSetChanged(); } } } }; AccountDescriptor account = getApp().getCurrentAccount(); if (account != null) { TwitterManager.get().getLists(account.getScreenName(), mFetchListsCallback); } } }; /* * */ void onLaneDataSetChanged() { if (mHomeLaneAdapter != null) { mHomeLaneAdapter.notifyDataSetChanged(); } if (mPageIndicator != null) { mPageIndicator.notifyDataSetChanged(); } getApp().getCurrentAccount().setDisplayedLaneDefinitionsDirty(false); } /* * */ class HomeLaneAdapter extends FragmentStatePagerAdapter implements TitleProvider { public HomeLaneAdapter(FragmentManager supportFragmentManager) { super(supportFragmentManager); } @Override public Fragment getItem(int position) { Fragment result = null; AccountDescriptor account = getApp().getCurrentAccount(); if (account != null) { String screenName = account.getScreenName(); LaneDescriptor laneDescriptor = account.getDisplayedLaneDefinition(position); switch (laneDescriptor.getLaneType()) { case USER_HOME_TIMELINE: case USER_PROFILE_TIMELINE: case USER_MENTIONS: case RETWEETS_OF_ME: case USER_FAVORITES: case GLOBAL_FEED: result = TweetFeedFragment.newInstance(position, laneDescriptor.getContentHandleBase(), screenName, Long.toString(account.getId())); break; case USER_PROFILE: result = ProfileFragment.newInstance(position, account.getId()); break; case USER_LIST_TIMELINE: result = TweetFeedFragment.newInstance(position, laneDescriptor.getContentHandleBase(), screenName, laneDescriptor.getIdentifier()); break; case FRIENDS: case FOLLOWERS: result = UserFeedFragment.newInstance(position, laneDescriptor.getContentHandleBase(), screenName, null); break; case DIRECT_MESSAGES: result = DirectMessageFeedFragment.newInstance(position, laneDescriptor.getContentHandleBase(), screenName, Long.toString(account.getId()), null); break; default: result = PlaceholderPagerFragment.newInstance(position, laneDescriptor.getLaneTitle(), position); break; } } return result; } @Override public int getCount() { AccountDescriptor account = getApp().getCurrentAccount(); if (account != null) { return account.getDisplayedLaneDefinitionsSize(); } return 0; } @Override public String getTitle(int position) { String result = null; AccountDescriptor account = getApp().getCurrentAccount(); if (account != null) { result = account.getDisplayedLaneDefinition(position).getLaneTitle().toUpperCase(); } return result; } @Override public int getItemPosition(Object object) { return POSITION_NONE; } } /* * */ Messenger mService = null; boolean mIsBound; final Messenger mMessenger = new Messenger(new IncomingHandler()); /* * */ class IncomingHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case BackgroundService.MSG_SET_INT_VALUE: // Log.d("Notifications", "Int Message: " + msg.arg1); break; case BackgroundService.MSG_SET_STRING_VALUE: //String str1 = msg.getData().getString("str1"); //textStrValue.setText("Str Message: " + str1); break; default: super.handleMessage(msg); } } } /* * */ private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { mService = new Messenger(service); //textStatus.setText("Attached."); try { Message msg = Message.obtain(null, BackgroundService.MSG_REGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // In this case the service has crashed before we could even do anything with it } } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been unexpectedly disconnected - process crashed. mService = null; //textStatus.setText("Disconnected."); } }; /* * */ void doBindService() { bindService(new Intent(this, BackgroundService.class), mConnection, Context.BIND_AUTO_CREATE); mIsBound = true; } /* * */ void doUnbindService() { if (mIsBound) { // If we have received the service, and hence registered with it, then now is the time to unregister. if (mService != null) { try { Message msg = Message.obtain(null, BackgroundService.MSG_UNREGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // There is nothing special we need to do if the service has crashed. } } // Detach our existing connection. unbindService(mConnection); mIsBound = false; } } /* * */ private void configureNotificationService() { //If the service is running when the activity starts, we want to automatically bind to it. if (BackgroundService.isRunning()) { doBindService(); } else { startService(new Intent(this, BackgroundService.class)); doBindService(); } } }