Java tutorial
/* * Copyright (C) 2011 The Stanford MobiSocial Laboratory * * This file is part of Musubi, a mobile social network. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package edu.stanford.mobisocial.dungbeetle.ui; import java.util.ArrayList; import java.util.List; import mobisocial.socialkit.Obj; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.database.ContentObserver; import android.database.Cursor; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import edu.stanford.mobisocial.dungbeetle.DBHelper; import edu.stanford.mobisocial.dungbeetle.DBIdentityProvider; import edu.stanford.mobisocial.dungbeetle.DungBeetleContentProvider; import edu.stanford.mobisocial.dungbeetle.Helpers; import edu.stanford.mobisocial.dungbeetle.R; import edu.stanford.mobisocial.dungbeetle.feed.DbObjects; import edu.stanford.mobisocial.dungbeetle.feed.iface.FeedView; import edu.stanford.mobisocial.dungbeetle.feed.iface.Filterable; import edu.stanford.mobisocial.dungbeetle.feed.objects.PresenceObj; import edu.stanford.mobisocial.dungbeetle.feed.objects.ProfileObj; import edu.stanford.mobisocial.dungbeetle.feed.view.PresenceView; import edu.stanford.mobisocial.dungbeetle.model.Contact; import edu.stanford.mobisocial.dungbeetle.model.DbObject; import edu.stanford.mobisocial.dungbeetle.model.MyInfo; import edu.stanford.mobisocial.dungbeetle.model.Presence; import edu.stanford.mobisocial.dungbeetle.ui.fragments.AppsViewFragment; import edu.stanford.mobisocial.dungbeetle.ui.fragments.FeedViewFragment; import edu.stanford.mobisocial.dungbeetle.util.CommonLayouts; import edu.stanford.mobisocial.dungbeetle.util.InstrumentedActivity; import edu.stanford.mobisocial.dungbeetle.util.Maybe.NoValError; import edu.stanford.mobisocial.dungbeetle.util.PhotoTaker; /** * TODO: This should be split into two classes: ViewProfileActivity and ViewContactActivity. */ public class ViewContactActivity extends MusubiBaseActivity implements ViewPager.OnPageChangeListener, Filterable { @SuppressWarnings("unused") private static final String TAG = "ProfileActivity"; private long mContactId; private Handler mHandler = new Handler(); private ViewPager mViewPager; private final List<Button> mButtons = new ArrayList<Button>(); private final List<Fragment> mFragments = new ArrayList<Fragment>(); private final List<String> mLabels = new ArrayList<String>(); ProfileContentObserver mProfileContentObserver; private final String[] filterTypes = DbObjects.getRenderableTypes(); private boolean[] checked; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_feed_home); checked = new boolean[filterTypes.length]; for (int x = 0; x < filterTypes.length; x++) { checked[x] = true; } findViewById(R.id.btn_broadcast).setVisibility(View.GONE); mContactId = getIntent().getLongExtra("contact_id", -1); if (mContactId == -1) { Uri data = getIntent().getData(); if (data != null) { try { mContactId = Long.parseLong(data.getLastPathSegment()); } catch (NumberFormatException e) { } } } Bundle args = new Bundle(); args.putLong("contact_id", mContactId); Fragment profileFragment = new ViewProfileFragment(); profileFragment.setArguments(args); if (mContactId == Contact.MY_ID) { doTitleBar(this, "My Profile"); mLabels.add("View"); mLabels.add("Edit"); mFragments.add(profileFragment); mFragments.add(new EditProfileFragment()); // TODO: Legitimize this. Move objects to a randomly generated private feed // Ability to "move" private feeds. // Have a "feedPtrObj" that tracks your current private. Store in-app feed. Uri privateUri = Uri.parse(DungBeetleContentProvider.CONTENT_URI + "/feeds/private"); mLabels.add("Notes"); Fragment feedView = new FeedViewFragment(); args = new Bundle(args); args.putParcelable(FeedViewFragment.ARG_FEED_URI, privateUri); feedView.setArguments(args); mFragments.add(feedView); } else { String title = "Profile"; Uri feedUri = null; try { Contact contact = Contact.forId(this, mContactId).get(); title = contact.name; feedUri = contact.getFeedUri(); } catch (NoValError e) { } args.putParcelable(FeedViewFragment.ARG_FEED_URI, feedUri); doTitleBar(this, title); mLabels.add("Feed"); mLabels.add("Apps"); mLabels.add("Profile"); Fragment feedView = new FeedViewFragment(); feedView.setArguments(args); Fragment appView = new AppsViewFragment(); appView.setArguments(args); mFragments.add(feedView); mFragments.add(appView); mFragments.add(profileFragment); if (MusubiBaseActivity.getInstance().isDeveloperModeEnabled()) { FeedView sharingView = new PresenceView(); sharingView.getFragment().setArguments(args); mLabels.add(sharingView.getName()); mFragments.add(sharingView.getFragment()); } } PagerAdapter adapter = new ViewFragmentAdapter(getSupportFragmentManager(), mFragments); mViewPager = (ViewPager) findViewById(R.id.feed_pager); mViewPager.setAdapter(adapter); mViewPager.setOnPageChangeListener(this); ViewGroup group = (ViewGroup) findViewById(R.id.tab_frame); int i = 0; for (String s : mLabels) { Button button = new Button(this); button.setText(s); button.setTextSize(18f); button.setLayoutParams(CommonLayouts.FULL_HEIGHT); button.setTag(i++); button.setOnClickListener(mViewSelected); group.addView(button); mButtons.add(button); } // Listen for future changes Uri feedUri; if (mContactId == Contact.MY_ID) { feedUri = Uri.parse(DungBeetleContentProvider.CONTENT_URI + "/feeds/me"); } else { feedUri = Uri.parse(DungBeetleContentProvider.CONTENT_URI + "/contacts"); } mProfileContentObserver = new ProfileContentObserver(mHandler); getContentResolver().registerContentObserver(feedUri, true, mProfileContentObserver); onPageSelected(0); } @Override protected void onPause() { super.onPause(); getContentResolver().unregisterContentObserver(mProfileContentObserver); } private class ProfileContentObserver extends ContentObserver { public ProfileContentObserver(Handler h) { super(h); } @Override public boolean deliverSelfNotifications() { return true; } @Override public void onChange(boolean selfChange) { super.onChange(selfChange); for (Fragment f : mFragments) { if (f instanceof ViewProfileFragment) { ((ViewProfileFragment) f).refresh(); } } } } public class ViewFragmentAdapter extends FragmentPagerAdapter { final int NUM_ITEMS; final List<Fragment> mFragments; public ViewFragmentAdapter(FragmentManager fm, List<Fragment> fragments) { super(fm); mFragments = fragments; NUM_ITEMS = mFragments.size(); } @Override public int getCount() { return NUM_ITEMS; } @Override public Fragment getItem(int position) { return mFragments.get(position); } } @Override public void onPageScrollStateChanged(int arg0) { } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageSelected(int position) { int c = mButtons.size(); for (int i = 0; i < c; i++) { mButtons.get(i).setBackgroundColor(Color.TRANSPARENT); } mButtons.get(position).setBackgroundColor(R.color.default_tab_selected); } private View.OnClickListener mViewSelected = new View.OnClickListener() { @Override public void onClick(View v) { Integer i = (Integer) v.getTag(); mViewPager.setCurrentItem(i); } }; /** * Fragments for various Profile UIs */ public static class EditProfileFragment extends Fragment { private ImageView mIcon; private EditText mProfileName; private EditText mProfileAbout; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.edit_profile, container, false); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); final DBHelper mHelper = DBHelper.getGlobal(getActivity()); final DBIdentityProvider mIdent = new DBIdentityProvider(mHelper); try { mProfileName = (EditText) getView().findViewById(R.id.edit_profile_name); mProfileAbout = (EditText) getView().findViewById(R.id.edit_profile_about); mProfileName.setText(mIdent.userName()); Contact c = mIdent.contactForUser(); mProfileName.setText(c.name); mProfileAbout.setText(c.status); Button saveButton = (Button) getView().findViewById(R.id.save_profile_button); saveButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { String name = mProfileName.getText().toString(); String about = mProfileAbout.getText().toString(); MyInfo.setMyName(mHelper, name); MyInfo.setMyAbout(mHelper, about); Obj obj = ProfileObj.forLocalUser(getActivity(), name, about); Helpers.sendToEveryone(getActivity(), obj); Toast.makeText(getActivity(), "Profile updated.", Toast.LENGTH_SHORT).show(); } }); } finally { mIdent.close(); mHelper.close(); } } @Override public void onDestroyView() { super.onDestroyView(); } } public static class ViewProfileFragment extends Fragment { private ImageView mIcon; private long mContactId; private TextView mProfileName; private TextView mProfileEmail; private TextView mProfileAbout; private Activity mActivity; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void onAttach(Activity activity) { //we have to save this because we get a callback mActivity = activity; super.onDetach(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mContactId = getArguments().getLong("contact_id"); View v = inflater.inflate(R.layout.view_self_profile, container, false); mIcon = (ImageView) v.findViewById(R.id.icon); final DBHelper mHelper = DBHelper.getGlobal(mActivity); final DBIdentityProvider mIdent = new DBIdentityProvider(mHelper); Contact c = null; try { c = mIdent.contactForUser(); } finally { mHelper.close(); mIdent.close(); } if (mContactId == Contact.MY_ID) { if (c.picture == null) { mIcon.setImageResource(R.drawable.anonymous); } else { mIcon.setImageBitmap(c.picture); } mIcon.setOnClickListener(new OnClickListener() { public void onClick(View v) { Toast.makeText(mActivity, "Loading camera...", Toast.LENGTH_SHORT).show(); ((InstrumentedActivity) mActivity) .doActivityForResult(new PhotoTaker(mActivity, new PhotoTaker.ResultHandler() { @Override public void onResult(Uri imageUri, byte[] data) { Helpers.updatePicture(mActivity, data); // updateProfileToGroups(); } }, 200, false)); } }); } else { } mProfileName = (TextView) v.findViewById(R.id.view_profile_name); mProfileEmail = (TextView) v.findViewById(R.id.view_profile_email); mProfileAbout = (TextView) v.findViewById(R.id.view_profile_about); return v; } @Override public void onResume() { super.onResume(); refresh(); } public void refresh() { View view = getView(); if (view == null) return; Spinner presence = (Spinner) view.findViewById(R.id.presence); if (mContactId == Contact.MY_ID) { final DBHelper mHelper = DBHelper.getGlobal(mActivity); final DBIdentityProvider mIdent = new DBIdentityProvider(mHelper); Contact c = null; try { c = mIdent.contactForUser(); } finally { mHelper.close(); mIdent.close(); } try { mProfileName.setText(c.name); mProfileEmail.setText(c.email); mProfileAbout.setText(c.status); mIcon.setImageBitmap(c.picture); } finally { mIdent.close(); mHelper.close(); } presence.setOnItemSelectedListener(new PresenceOnItemSelectedListener(getActivity())); ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, Presence.presences); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); presence.setAdapter(adapter); Cursor cursor = getActivity().getContentResolver().query( Uri.parse(DungBeetleContentProvider.CONTENT_URI + "/feeds/me/head"), null, DbObject.TYPE + "=?", new String[] { PresenceObj.TYPE }, DbObject.TIMESTAMP + " DESC"); try { if (cursor.moveToFirst()) { String jsonSrc = cursor.getString(cursor.getColumnIndexOrThrow(DbObject.JSON)); try { JSONObject obj = new JSONObject(jsonSrc); int myPresence = Integer.parseInt(obj.optString("presence")); presence.setSelection(myPresence); } catch (JSONException e) { } } } finally { cursor.close(); } } else { presence.setVisibility(View.GONE); try { Contact contact = Contact.forId(getActivity(), mContactId).get(); mProfileName.setText(contact.name); mProfileEmail.setText(contact.email); mProfileAbout.setText(contact.status); mIcon.setImageBitmap(contact.picture); } catch (NoValError e) { } } } private class PresenceOnItemSelectedListener implements OnItemSelectedListener { private boolean mEnablePresenceUpdates = false; private Activity mActivity; public PresenceOnItemSelectedListener(Activity context) { mActivity = context; } public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { // fix bug where initial selection firing event if (mEnablePresenceUpdates) { Helpers.updatePresence(mActivity, pos); } else { mEnablePresenceUpdates = true; } } public void onNothingSelected(AdapterView parent) { // Do nothing. } } } @Override public String[] getFilterTypes() { return filterTypes; } @Override public boolean[] getFilterCheckboxes() { return checked; } @Override public void setFilterCheckbox(int position, boolean check) { checked[position] = check; } }