Android example source code file (IsolatedContext.java)

This example Android source code file (IsolatedContext.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

account, accounts, android, authenticatorexception, content, contentresolver, contextwrapper, file, handler, ioexception, isolatedcontext, list, mockaccountmanager, mockaccountmanagerfuture, operationcanceledexception, override, string, threading, threads, uri

The IsolatedContext.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * 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 android.test;

import com.google.android.collect.Lists;

import android.accounts.AccountManager;
import android.accounts.AccountManagerCallback;
import android.accounts.AccountManagerFuture;
import android.accounts.AuthenticatorException;
import android.accounts.OnAccountsUpdateListener;
import android.accounts.OperationCanceledException;
import android.accounts.Account;
import android.content.ContextWrapper;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.Context;
import android.content.ServiceConnection;
import android.content.BroadcastReceiver;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Handler;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeoutException;
import java.util.List;


/**
     * A mock context which prevents its users from talking to the rest of the device while
 * stubbing enough methods to satify code that tries to talk to other packages.
 */
public class IsolatedContext extends ContextWrapper {

    private ContentResolver mResolver;
    private final MockAccountManager mMockAccountManager;

    private List<Intent> mBroadcastIntents = Lists.newArrayList();

    public IsolatedContext(
            ContentResolver resolver, Context targetContext) {
        super(targetContext);
        mResolver = resolver;
        mMockAccountManager = new MockAccountManager();
    }

    /** Returns the list of intents that were broadcast since the last call to this method. */
    public List<Intent> getAndClearBroadcastIntents() {
        List<Intent> intents = mBroadcastIntents;
        mBroadcastIntents = Lists.newArrayList();
        return intents;
    }

    @Override
    public ContentResolver getContentResolver() {
        // We need to return the real resolver so that MailEngine.makeRight can get to the
        // subscribed feeds provider. TODO: mock out subscribed feeds too.
        return mResolver;
    }

    @Override
    public boolean bindService(Intent service, ServiceConnection conn, int flags) {
        return false;
    }

    @Override
    public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
        return null;
    }

    @Override
    public void sendBroadcast(Intent intent) {
        mBroadcastIntents.add(intent);
    }

    @Override
    public void sendOrderedBroadcast(Intent intent, String receiverPermission) {
        mBroadcastIntents.add(intent);
    }

    @Override
    public int checkUriPermission(
            Uri uri, String readPermission, String writePermission, int pid,
            int uid, int modeFlags) {
        return PackageManager.PERMISSION_GRANTED;
    }

    @Override
    public int checkUriPermission(Uri uri, int pid, int uid, int modeFlags) {
        return PackageManager.PERMISSION_GRANTED;
    }

    @Override
    public Object getSystemService(String name) {
        if (Context.ACCOUNT_SERVICE.equals(name)) {
            return mMockAccountManager;
        }
        // No other services exist in this context.
        return null;
    }

    private class MockAccountManager extends AccountManager {
        public MockAccountManager() {
            super(IsolatedContext.this, null /* IAccountManager */, null /* handler */);
        }

        public void addOnAccountsUpdatedListener(OnAccountsUpdateListener listener,
                Handler handler, boolean updateImmediately) {
            // do nothing
        }

        public Account[] getAccounts() {
            return new Account[]{};
        }

        public AccountManagerFuture<Account[]> getAccountsByTypeAndFeatures(
                final String type, final String[] features,
                AccountManagerCallback<Account[]> callback, Handler handler) {
            return new MockAccountManagerFuture<Account[]>(new Account[0]);
        }

        public String blockingGetAuthToken(Account account, String authTokenType,
                boolean notifyAuthFailure)
                throws OperationCanceledException, IOException, AuthenticatorException {
            return null;
        }


        /**
         * A very simple AccountManagerFuture class
         * that returns what ever was passed in
         */
        private class MockAccountManagerFuture<T>
                implements AccountManagerFuture<T> {

            T mResult;

            public MockAccountManagerFuture(T result) {
                mResult = result;
            }

            public boolean cancel(boolean mayInterruptIfRunning) {
                return false;
            }

            public boolean isCancelled() {
                return false;
            }

            public boolean isDone() {
                return true;
            }

            public T getResult()
                    throws OperationCanceledException, IOException, AuthenticatorException {
                return mResult;
            }

            public T getResult(long timeout, TimeUnit unit)
                    throws OperationCanceledException, IOException, AuthenticatorException {
                return getResult();
            }
        }

    }

    @Override
    public File getFilesDir() {
        return new File("/dev/null");
    }
}