Editor

LocalService.java

/*
 * Copyright 2015, 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 com.example.android.testing.ServiceTestRuleSample;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;

import java.util.Random;

/**
 * {@link Service} that generates random numbers.
 * <p>
 * A seed for the random number generator can be set via the {@link Intent} passed to
 * {@link #onBind(Intent)}.
 */
public class LocalService extends Service {
    // Used as a key for the Intent.
    public static final String SEED_KEY = "SEED_KEY";

// Binder given to clients
    private final IBinder mBinder = new LocalBinder();

// Random number generator
    private Random mGenerator = new Random();

private long mSeed;

@Override
    public IBinder onBind(Intent intent) {
        // If the Intent comes with a seed for the number generator, apply it.
        if (intent.hasExtra(SEED_KEY)) {
            mSeed = intent.getLongExtra(SEED_KEY, 0);
            mGenerator.setSeed(mSeed);
        }
        return mBinder;
    }

public class LocalBinder extends Binder {

public LocalService getService() {
            // Return this instance of LocalService so clients can call public methods.
            return LocalService.this;
        }
    }

/**
     * Returns a random integer in [0, 100).
     */
    public int getRandomInt() {
        return mGenerator.nextInt(100);
    }
}