com.btmura.android.reddit.app.AccountListFragment.java Source code

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Here is the source code for com.btmura.android.reddit.app.AccountListFragment.java

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/*
 * Copyright (C) 2012 Brian Muramatsu
 *
 * 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.btmura.android.reddit.app;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.AccountManagerFuture;
import android.accounts.AuthenticatorException;
import android.accounts.OperationCanceledException;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.util.Log;
import android.util.SparseBooleanArray;
import android.view.ActionMode;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView.MultiChoiceModeListener;
import android.widget.ListView;

import com.btmura.android.reddit.R;
import com.btmura.android.reddit.accounts.AccountUtils;
import com.btmura.android.reddit.content.AccountLoader;
import com.btmura.android.reddit.content.AccountLoader.AccountResult;
import com.btmura.android.reddit.provider.AccountProvider;
import com.btmura.android.reddit.widget.AccountResultAdapter;

import java.io.IOException;

public class AccountListFragment extends ListFragment
        implements LoaderCallbacks<AccountResult>, MultiChoiceModeListener {

    private static final String TAG = "AccountListFragment";

    public interface OnAccountSelectedListener {
        void onAccountSelected(String accountName);
    }

    private OnAccountSelectedListener listener;
    private AccountResultAdapter adapter;

    public static AccountListFragment newInstance() {
        return new AccountListFragment();
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        if (activity instanceof OnAccountSelectedListener) {
            listener = (OnAccountSelectedListener) activity;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        adapter = AccountResultAdapter.newAccountListInstance(getActivity());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = super.onCreateView(inflater, container, savedInstanceState);
        ListView l = (ListView) v.findViewById(android.R.id.list);
        l.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
        l.setMultiChoiceModeListener(this);
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setListAdapter(adapter);
        setListShown(false);
        getLoaderManager().initLoader(0, null, this);
    }

    @Override
    public Loader<AccountResult> onCreateLoader(int id, Bundle args) {
        return new AccountLoader(getActivity(), false, true);
    }

    @Override
    public void onLoadFinished(Loader<AccountResult> loader, AccountResult result) {
        adapter.setAccountResult(result);
        setEmptyText(getString(result != null ? R.string.empty_accounts : R.string.error));
        setListShown(true);
    }

    @Override
    public void onLoaderReset(Loader<AccountResult> loader) {
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        if (listener != null) {
            listener.onAccountSelected(adapter.getItem(position).getAccountName());
        }
    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        mode.getMenuInflater().inflate(R.menu.account_action_menu, menu);
        return true;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        int count = getListView().getCheckedItemCount();
        mode.setTitle(getResources().getQuantityString(R.plurals.accounts, count, count));
        return true;
    }

    @Override
    public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
        mode.invalidate();
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_delete:
            handleDelete(mode);
            return true;

        default:
            return false;
        }
    }

    private void handleDelete(ActionMode mode) {
        SparseBooleanArray checked = getListView().getCheckedItemPositions();
        int checkedCount = getListView().getCheckedItemCount();
        String[] accountNames = new String[checkedCount];
        int count = adapter.getCount();
        int j = 0;
        for (int i = 0; i < count; i++) {
            if (checked.get(i)) {
                accountNames[j++] = adapter.getItem(i).getAccountName();
            }
        }
        removeAccounts(accountNames);
        mode.finish();
    }

    private void removeAccounts(final String[] accountNames) {
        final Context ctx = getActivity().getApplicationContext();
        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... voidRay) {
                for (int i = 0; i < accountNames.length; i++) {
                    AccountProvider.removeAccount(ctx, accountNames[i]);
                }
                return null;
            }
        }.execute();
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
    }
}