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.shafiq.mytwittle.view; import org.tweetalib.android.TwitterFetchResult; import org.tweetalib.android.TwitterFetchUser; import org.tweetalib.android.TwitterManager; import org.tweetalib.android.model.TwitterUser; import android.app.ActionBar; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; 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.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import android.widget.ViewSwitcher; import com.shafiq.mytwittle.model.ComposeTweetDefault; import com.shafiq.mytwittle.model.LaneDescriptor; import com.shafiq.mytwittle.widget.viewpagerindicator.TitleProvider; public class ProfileActivity extends BaseLaneActivity { ProfileAdapter mProfileAdapter; ViewSwitcher mViewSwitcher; TwitterUser mUser; String mScreenName; /* * (non-Javadoc) * * @see * com.shafiq.mytwittle.view.BaseLaneActivity#onCreate(android.os.Bundle) */ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mScreenName = getIntent().getStringExtra("userScreenName"); if (mScreenName == null) { Uri data = getIntent().getData(); mScreenName = data.toString().replace("com.shafiq.mytwittle.profile://", "").replace("@", ""); } if (mScreenName == null) { restartApp(); return; } TwitterFetchUser.FinishedCallback callback = TwitterManager.get() .getFetchUserInstance().new FinishedCallback() { @Override public void finished(TwitterFetchResult result, TwitterUser user) { if (result.isSuccessful()) { mUser = user; updateViewVisibility(); } else { // TODO: Handle this properly finish(); } } }; boolean requestedUser = false; String profileIdAsString = getIntent().getStringExtra("userId"); Long mappedProfileId = TwitterManager.getUserIdFromScreenName(mScreenName); if (mappedProfileId != null) { mUser = TwitterManager.get().getUser(mappedProfileId, callback); requestedUser = true; } else if (profileIdAsString != null) { long profileId = Long.parseLong(profileIdAsString); if (profileId > 0) { mUser = TwitterManager.get().getUser(profileId, callback); requestedUser = true; } } if (requestedUser == false) { mUser = TwitterManager.get().getUser(mScreenName, callback); } mViewSwitcher = (ViewSwitcher) findViewById(R.id.rootViewSwitcher); updateViewVisibility(); } /* * (non-Javadoc) * * @see com.shafiq.mytwittle.view.BaseLaneActivity#onDestroy() */ @Override protected void onDestroy() { // By clearing this variable and checking whether it's valid in // updateViewVisibility(), an exception is averted whe nthe Activity is // destroyed, yet a callback is still initiated from a Twitter fetch // operation. A better solution is needed here, but this works for now. mProfileAdapter = null; super.onDestroy(); } /* * */ @Override protected ComposeTweetDefault getComposeTweetDefault() { return new ComposeTweetDefault(getApp().getCurrentAccountScreenName(), "@" + mScreenName + " ", null, null); } /* * (non-Javadoc) * * @see com.shafiq.mytwittle.view.BaseLaneActivity#getAdapterForViewPager() */ @Override protected PagerAdapter getAdapterForViewPager() { if (mProfileAdapter == null) { mProfileAdapter = new ProfileAdapter(getSupportFragmentManager()); } return mProfileAdapter; } /* * (non-Javadoc) * * @see * com.shafiq.mytwittle.view.BaseLaneActivity#getFragmentStatePagerAdapter * () */ @Override protected FragmentStatePagerAdapter getFragmentStatePagerAdapter() { return mProfileAdapter; } /* * */ private void updateViewVisibility() { configureActionBarView(); mViewSwitcher.reset(); if (mUser == null) { mViewSwitcher.setDisplayedChild(0); } else { mViewSwitcher.setDisplayedChild(1); // Will be NULL if the callback was called after the Activity was // released if (mProfileAdapter != null) { mProfileAdapter.notifyDataSetChanged(); } } } /* * */ @Override public boolean configureOptionsMenu(Menu menu) { super.configureOptionsMenu(menu); return configureActionBarView(); } /* * */ boolean configureActionBarView() { if (mScreenName != null) { ActionBar actionBar = getActionBar(); actionBar.setDisplayUseLogoEnabled(true); actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setDisplayShowTitleEnabled(false); LayoutInflater inflator = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); int layout = R.layout.profile_title_thin; /* * // TODO: This is messy, and likely won't work for large screen * devices. Need to come up with a better solution int layout; if * (getResources().getConfiguration().orientation == * Configuration.ORIENTATION_LANDSCAPE) { layout= * R.layout.profile_title_thin; } else { layout = * R.layout.profile_title; } */ View profileTitleView = inflator.inflate(layout, null); ((TextView) profileTitleView.findViewById(R.id.screenname)).setText("@" + mScreenName); TextView fullNameTextView = (TextView) profileTitleView.findViewById(R.id.fullname); if (fullNameTextView != null && mUser != null) { fullNameTextView.setText(mUser.getName()); } ImageView verifiedImage = (ImageView) profileTitleView.findViewById(R.id.verifiedImage); verifiedImage.setVisibility(mUser != null && mUser.getVerified() ? View.VISIBLE : View.GONE); actionBar.setDisplayShowCustomEnabled(true); actionBar.setCustomView(profileTitleView); } return true; } /* * (non-Javadoc) * * @see * com.shafiq.mytwittle.view.BaseLaneActivity#onOptionsItemSelected(android * .view.MenuItem) */ @Override public boolean onOptionsItemSelected(MenuItem item) { if (super.onOptionsItemSelected(item) == true) { return true; } switch (item.getItemId()) { case android.R.id.home: // app icon in action bar clicked; go home Intent intent = new Intent(this, HomeActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); return true; default: return false; } } /* * */ class ProfileAdapter extends FragmentStatePagerAdapter implements TitleProvider { public ProfileAdapter(FragmentManager supportFragmentManager) { super(supportFragmentManager); } @Override public Fragment getItem(int position) { Fragment result = null; if (mUser != null) { LaneDescriptor laneDescriptor = getApp().getProfileLaneDescriptor(position); switch (laneDescriptor.getLaneType()) { case PROFILE_PROFILE: result = ProfileFragment.newInstance(position, mUser.getId()); break; case PROFILE_PROFILE_TIMELINE: case PROFILE_MENTIONS: case PROFILE_FAVORITES: result = TweetFeedFragment.newInstance(position, laneDescriptor.getContentHandleBase(), mUser.getScreenName(), Long.toString(mUser.getId()), getApp().getCurrentAccountKey()); break; default: result = PlaceholderPagerFragment.newInstance(position, laneDescriptor.getLaneTitle(), position); break; } } else { result = LoadingFragment.newInstance(position); } return result; } @Override public int getCount() { return getApp().getProfileLaneDefinitions().size(); } @Override public String getTitle(int position) { return getApp().getProfileLaneDescriptor(position).getLaneTitle().toUpperCase(); } @Override public int getItemPosition(Object object) { return POSITION_NONE; } } }