Android(安卓)Priority Job Queue使用（1）

1．简介
Android Priority Job Queue是一款专门为Android编写，实现了Job Queue的后台任务队列按优先级处理
github地址：https://github.com/path/android-priority-jobqueue ，直接下载使用，貌似demo不能正常运行，参考其他资料自己写了一个demo: https://github.com/HungryGoogle/LeeArchtecture.git

2. 背景
几乎所有的应用程序都存在后台线程工作。这些“背景任务”需要保持应用程序响应性和鲁棒性，特别是在不利的情况下（如有限的网络连接）。在安卓应用中，有几种方法来实现后台工作：
1) 异步任务：
2) 使用service：
3) 本文讲的Android Priority Job Queue 作业队列提供了一个很好的框架来完成上述所有的工作。当确定了你的后台任务的工作时，将它们作为Job添加到你jobmanager实例。Job Manage会照顾优先级，持久性，负载平衡，延迟，网络控制，分组等，它还提供了一个很好的生命周期，为工作提供一个更好的，一致的用户体验。

3. 使用(基于android studio)
1.添加依赖

compile 'com.birbit:android-priority-jobqueue:1.3.5'

2.创建Application并配置JobManager

public class AppApplication extends Application{    private JobManager jobManager;    public static AppApplication instance;    @Override    public void onCreate() {        super.onCreate();        configureJobManager();    }    public AppApplication(){        instance=this;    }    public JobManager getJobManager() {        return jobManager;    }    public static AppApplication getInstance() {        return instance;    }    private void configureJobManager() {        Configuration configuration = new Configuration.Builder(this)                .customLogger(new CustomLogger() {                    private static final String TAG = "JOBS";                    @Override                    public boolean isDebugEnabled() {                        return true;                    }                    @Override                    public void d(String text, Object... args) {                        Log.i(TAG, String.format(text, args));                    }                    @Override                    public void e(Throwable t, String text, Object... args) {                        Log.e(TAG, String.format(text, args), t);                    }                    @Override                    public void e(String text, Object... args) {                        Log.e(TAG, String.format(text, args));                    }                })                .minConsumerCount(1)//always keep at least one consumer alive                .maxConsumerCount(3)//up to 3 consumers at a time                .loadFactor(3)//3 jobs per consumer                .consumerKeepAlive(120)//wait 2 minute                .build();        jobManager = new JobManager(this, configuration);    }}

3.创建Job任务

public class MJob extends Job {    private static final String TAG = "LeeTest------->";    private String text;    /**     * 初始化任务，将text作为优先级，也作为任务号     * @param text 必须为整形的字符串 需要作为job的优先级使用 比如 1     *             {@code com.example.li.leeandroidpriorityjobqueue. MJob#onAdded}     */    public MJob(String text) {        super(new Params(Integer.parseInt(text)).persist());        this.text = text;        Log.i(TAG, text + "  init");    }    @Override    public void onAdded() {        Log.i(TAG, text + "  Onadded to task list");    }    @Override    public void onRun() throws Throwable {        Log.i(TAG, text + "  onRun");        Thread.sleep(1000);    }    @Override    protected RetryConstraint shouldReRunOnThrowable(Throwable throwable, int runCount,int maxRunCount) {        return RetryConstraint.createExponentialBackoff(runCount, 1000);    }    @Override    protected void onCancel() {        Log.i(TAG, text + "  onCancel");    }}

4.MainActivity

public class MainActivity extends AppCompatActivity {    private JobManager jobManager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        jobManager = AppApplication.getInstance().getJobManager();        Button btn_start = (Button) findViewById(R.id.btn_start);        btn_start.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                jobManager.addJobInBackground(new MJob("1"));                jobManager.addJobInBackground(new MJob("2"));                jobManager.addJobInBackground(new MJob("3"));                jobManager.addJobInBackground(new MJob("4"));                jobManager.addJobInBackground(new MJob("5"));                jobManager.addJobInBackground(new MJob("6"));                jobManager.addJobInBackground(new MJob("7"));                jobManager.addJobInBackground(new MJob("8"));                jobManager.addJobInBackground(new MJob("9"));                jobManager.addJobInBackground(new MJob("18"));                jobManager.addJobInBackground(new MJob("28"));                jobManager.addJobInBackground(new MJob("38"));                jobManager.addJobInBackground(new MJob("48"));                jobManager.addJobInBackground(new MJob("58"));                jobManager.addJobInBackground(new MJob("68"));                jobManager.addJobInBackground(new MJob("78"));                jobManager.addJobInBackground(new MJob("88"));            }        });    }}

添加权限

<uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"/>

设置application<application    android:name=".AppApplication"

code : https://github.com/HungryGoogle/LeeArchtecture.git

4.执行结果

09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 1  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 2  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 3  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 4  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 5  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 6  init09-06 09:20:56.235 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 7  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 8  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 9  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 18  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 28  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 38  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 48  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 58  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 68  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 78  init09-06 09:20:56.236 15211-15211/com.example.androidpriorityjobqueue I/LeeTest------->: 88  init09-06 09:20:56.245 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 1  Onadded to task list09-06 09:20:56.259 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 1  onRun09-06 09:20:56.265 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 2  Onadded to task list09-06 09:20:56.269 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 2  onRun09-06 09:20:56.275 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 3  Onadded to task list09-06 09:20:56.284 15211-15277/com.example.androidpriorityjobqueue I/LeeTest------->: 3  onRun09-06 09:20:56.289 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 4  Onadded to task list09-06 09:20:56.298 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 5  Onadded to task list09-06 09:20:56.306 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 6  Onadded to task list09-06 09:20:56.315 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 7  Onadded to task list09-06 09:20:56.323 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 8  Onadded to task list09-06 09:20:56.332 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 9  Onadded to task list09-06 09:20:56.340 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 18  Onadded to task list09-06 09:20:56.349 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 28  Onadded to task list09-06 09:20:56.357 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 38  Onadded to task list09-06 09:20:56.366 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 48  Onadded to task list09-06 09:20:56.374 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 58  Onadded to task list09-06 09:20:56.386 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 68  Onadded to task list09-06 09:20:56.399 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 78  Onadded to task list09-06 09:20:56.410 15211-15276/com.example.androidpriorityjobqueue I/LeeTest------->: 88  Onadded to task list09-06 09:20:57.279 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 88  onRun09-06 09:20:57.286 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 78  onRun09-06 09:20:57.299 15211-15277/com.example.androidpriorityjobqueue I/LeeTest------->: 68  onRun09-06 09:20:58.303 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 58  onRun09-06 09:20:58.312 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 48  onRun09-06 09:20:58.321 15211-15277/com.example.androidpriorityjobqueue I/LeeTest------->: 38  onRun09-06 09:20:59.329 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 28  onRun09-06 09:20:59.337 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 18  onRun09-06 09:20:59.343 15211-15277/com.example.androidpriorityjobqueue I/LeeTest------->: 9  onRun09-06 09:21:00.346 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 8  onRun09-06 09:21:00.354 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 7  onRun09-06 09:21:00.358 15211-15277/com.example.androidpriorityjobqueue I/LeeTest------->: 6  onRun09-06 09:21:01.376 15211-15279/com.example.androidpriorityjobqueue I/LeeTest------->: 5  onRun09-06 09:21:01.386 15211-15278/com.example.androidpriorityjobqueue I/LeeTest------->: 4  onRun

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