Java tutorial
/* * Twittnuker - Twitter client for Android * * Copyright (C) 2013-2014 vanita5 <mail@vanita5.de> * * This program incorporates a modified version of Twidere. * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com> * * 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 3 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, see <http://www.gnu.org/licenses/>. */ package de.vanita5.twittnuker.activity.support; import static android.text.TextUtils.isEmpty; import static de.vanita5.twittnuker.util.ParseUtils.parseString; import static de.vanita5.twittnuker.util.Utils.getAccountScreenName; import static de.vanita5.twittnuker.util.Utils.getTwitterInstance; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AutoCompleteTextView; import android.widget.ListView; import de.vanita5.twittnuker.R; import de.vanita5.twittnuker.adapter.SimpleParcelableUserListsAdapter; import de.vanita5.twittnuker.adapter.SimpleParcelableUsersAdapter; import de.vanita5.twittnuker.adapter.UserHashtagAutoCompleteAdapter; import de.vanita5.twittnuker.fragment.support.CreateUserListDialogFragment; import de.vanita5.twittnuker.fragment.support.SupportProgressDialogFragment; import de.vanita5.twittnuker.model.ParcelableUser; import de.vanita5.twittnuker.model.ParcelableUserList; import de.vanita5.twittnuker.model.SingleResponse; import de.vanita5.twittnuker.task.AsyncTask; import twitter4j.ResponseList; import twitter4j.Twitter; import twitter4j.TwitterException; import twitter4j.User; import twitter4j.UserList; import twitter4j.http.HttpResponseCode; import java.util.ArrayList; import java.util.List; public class UserListSelectorActivity extends BaseSupportDialogActivity implements OnClickListener, OnItemClickListener { private AutoCompleteTextView mEditScreenName; private ListView mUserListsListView, mUsersListView; private SimpleParcelableUserListsAdapter mUserListsAdapter; private SimpleParcelableUsersAdapter mUsersAdapter; private View mUsersListContainer, mUserListsContainer, mCreateUserListContainer; private String mScreenName; private final BroadcastReceiver mStatusReceiver = new BroadcastReceiver() { @Override public void onReceive(final Context context, final Intent intent) { final String action = intent.getAction(); if (BROADCAST_USER_LIST_CREATED.equals(action)) { getUserLists(mScreenName); } } }; @Override public void onClick(final View v) { switch (v.getId()) { case R.id.screen_name_confirm: { final String screen_name = parseString(mEditScreenName.getText()); if (isEmpty(screen_name)) return; searchUser(screen_name); break; } case R.id.create_list: { final DialogFragment f = new CreateUserListDialogFragment(); final Bundle args = new Bundle(); args.putLong(EXTRA_ACCOUNT_ID, getAccountId()); f.setArguments(args); f.show(getSupportFragmentManager(), null); break; } } } @Override public void onContentChanged() { super.onContentChanged(); mUsersListContainer = findViewById(R.id.users_list_container); mUserListsContainer = findViewById(R.id.user_lists_container); mEditScreenName = (AutoCompleteTextView) findViewById(R.id.edit_screen_name); mUserListsListView = (ListView) findViewById(R.id.user_lists_list); mUsersListView = (ListView) findViewById(R.id.users_list); mCreateUserListContainer = findViewById(R.id.create_list_container); } @Override public void onItemClick(final AdapterView<?> view, final View child, final int position, final long id) { final int view_id = view.getId(); final ListView list = (ListView) view; if (view_id == R.id.users_list) { final ParcelableUser user = mUsersAdapter.getItem(position - list.getHeaderViewsCount()); if (user == null) return; if (isSelectingUser()) { final Intent data = new Intent(); data.setExtrasClassLoader(getClassLoader()); data.putExtra(EXTRA_USER, user); setResult(RESULT_OK, data); finish(); } else { getUserLists(user.screen_name); } } else if (view_id == R.id.user_lists_list) { final Intent data = new Intent(); data.putExtra(EXTRA_USER_LIST, mUserListsAdapter.getItem(position - list.getHeaderViewsCount())); setResult(RESULT_OK, data); finish(); } } public void setUsersData(final List<ParcelableUser> data) { mUsersAdapter.setData(data, true); mUsersListContainer.setVisibility(View.VISIBLE); mUserListsContainer.setVisibility(View.GONE); } @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); final Intent intent = getIntent(); if (!intent.hasExtra(EXTRA_ACCOUNT_ID)) { finish(); return; } setContentView(R.layout.activity_user_list_selector); if (savedInstanceState == null) { mScreenName = intent.getStringExtra(EXTRA_SCREEN_NAME); } else { mScreenName = savedInstanceState.getString(EXTRA_SCREEN_NAME); } final boolean selecting_user = isSelectingUser(); setTitle(selecting_user ? R.string.select_user : R.string.select_user_list); if (!isEmpty(mScreenName)) { if (selecting_user) { searchUser(mScreenName); } else { getUserLists(mScreenName); } } mEditScreenName.setAdapter(new UserHashtagAutoCompleteAdapter(this)); mEditScreenName.setText(mScreenName); mUserListsListView.setAdapter(mUserListsAdapter = new SimpleParcelableUserListsAdapter(this)); mUsersListView.setAdapter(mUsersAdapter = new SimpleParcelableUsersAdapter(this)); mUserListsListView.setOnItemClickListener(this); mUsersListView.setOnItemClickListener(this); if (selecting_user) { mUsersListContainer.setVisibility(View.VISIBLE); mUserListsContainer.setVisibility(View.GONE); } else { mUsersListContainer.setVisibility(isEmpty(mScreenName) ? View.VISIBLE : View.GONE); mUserListsContainer.setVisibility(isEmpty(mScreenName) ? View.GONE : View.VISIBLE); } } @Override protected void onSaveInstanceState(final Bundle outState) { super.onSaveInstanceState(outState); outState.putString(EXTRA_SCREEN_NAME, mScreenName); } @Override protected void onStart() { super.onStart(); final IntentFilter filter = new IntentFilter(BROADCAST_USER_LIST_CREATED); registerReceiver(mStatusReceiver, filter); } @Override protected void onStop() { unregisterReceiver(mStatusReceiver); super.onStop(); } private long getAccountId() { return getIntent().getLongExtra(EXTRA_ACCOUNT_ID, -1); } private void getUserLists(final String screen_name) { if (screen_name == null) return; mScreenName = screen_name; final GetUserListsTask task = new GetUserListsTask(this, getAccountId(), screen_name); task.execute(); } private boolean isSelectingUser() { return INTENT_ACTION_SELECT_USER.equals(getIntent().getAction()); } private void searchUser(final String name) { final SearchUsersTask task = new SearchUsersTask(this, getAccountId(), name); task.execute(); } private void setUserListsData(final List<ParcelableUserList> data, final boolean is_my_account) { mUserListsAdapter.setData(data, true); mUsersListContainer.setVisibility(View.GONE); mUserListsContainer.setVisibility(View.VISIBLE); mCreateUserListContainer.setVisibility(is_my_account ? View.VISIBLE : View.GONE); } private static class GetUserListsTask extends AsyncTask<Void, Void, SingleResponse<List<ParcelableUserList>>> { private static final String FRAGMENT_TAG_GET_USER_LISTS = "get_user_lists"; private final UserListSelectorActivity mActivity; private final long mAccountId; private final String mScreenName; GetUserListsTask(final UserListSelectorActivity activity, final long account_id, final String screen_name) { mActivity = activity; mAccountId = account_id; mScreenName = screen_name; } @Override protected SingleResponse<List<ParcelableUserList>> doInBackground(final Void... params) { final Twitter twitter = getTwitterInstance(mActivity, mAccountId, false); if (twitter == null) return SingleResponse.getInstance(); try { final ResponseList<UserList> lists = twitter.getUserLists(mScreenName); final List<ParcelableUserList> data = new ArrayList<ParcelableUserList>(); boolean is_my_account = mScreenName.equalsIgnoreCase(getAccountScreenName(mActivity, mAccountId)); for (final UserList item : lists) { final User user = item.getUser(); if (user != null && mScreenName.equalsIgnoreCase(user.getScreenName())) { if (!is_my_account && user.getId() == mAccountId) { is_my_account = true; } data.add(new ParcelableUserList(item, mAccountId)); } } final SingleResponse<List<ParcelableUserList>> result = SingleResponse.getInstance(data); result.getExtras().putBoolean(EXTRA_IS_MY_ACCOUNT, is_my_account); return result; } catch (final TwitterException e) { e.printStackTrace(); return SingleResponse.getInstance(e); } } @Override protected void onPostExecute(final SingleResponse<List<ParcelableUserList>> result) { final Fragment f = mActivity.getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_GET_USER_LISTS); if (f instanceof DialogFragment) { ((DialogFragment) f).dismiss(); } if (result.getData() != null) { mActivity.setUserListsData(result.getData(), result.getExtras().getBoolean(EXTRA_IS_MY_ACCOUNT)); } else if (result.getException() instanceof TwitterException) { final TwitterException te = (TwitterException) result.getException(); if (te.getStatusCode() == HttpResponseCode.NOT_FOUND) { mActivity.searchUser(mScreenName); } } } @Override protected void onPreExecute() { SupportProgressDialogFragment.show(mActivity, FRAGMENT_TAG_GET_USER_LISTS).setCancelable(false); } } private static class SearchUsersTask extends AsyncTask<Void, Void, SingleResponse<List<ParcelableUser>>> { private static final String FRAGMENT_TAG_SEARCH_USERS = "search_users"; private final UserListSelectorActivity mActivity; private final long mAccountId; private final String mName; SearchUsersTask(final UserListSelectorActivity activity, final long account_id, final String name) { mActivity = activity; mAccountId = account_id; mName = name; } @Override protected SingleResponse<List<ParcelableUser>> doInBackground(final Void... params) { final Twitter twitter = getTwitterInstance(mActivity, mAccountId, false); if (twitter == null) return SingleResponse.getInstance(); try { final ResponseList<User> lists = twitter.searchUsers(mName, 1); final List<ParcelableUser> data = new ArrayList<ParcelableUser>(); for (final User item : lists) { data.add(new ParcelableUser(item, mAccountId)); } return SingleResponse.getInstance(data); } catch (final TwitterException e) { e.printStackTrace(); return SingleResponse.getInstance(e); } } @Override protected void onPostExecute(final SingleResponse<List<ParcelableUser>> result) { final Fragment f = mActivity.getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_SEARCH_USERS); if (f instanceof DialogFragment) { ((DialogFragment) f).dismiss(); } if (result.getData() != null) { mActivity.setUsersData(result.getData()); } } @Override protected void onPreExecute() { SupportProgressDialogFragment.show(mActivity, FRAGMENT_TAG_SEARCH_USERS).setCancelable(false); } } }