Android_RxJava2.0封装异步任务RxAsyncTask

来源：互联网发布：windows sleep 头文件编辑：程序博客网时间：2024/06/05 07:31

本来昨晚2016.12.31晚要发布的，没写好，今天，2017年第一天，早上就整理了下，把RxJava1.x给替换成了RxJava2.x版本，基本都需要改了，不懂的可以先去了解RxJava1.x 2.x。这篇文章主要是使用RxJava封装异步任务，用过AsyncTask的童鞋都清楚，AsyncTask的原理，调用顺序，线程切换等，废话不多说上代码：

/** * Author KINCAI * . * description TODO * . * Time 2016-12-31 23:16 */public abstract class RxAsyncTask<Param, Progress, Result> {    private final String TAG = this.getClass().getSimpleName();    private Flowable<Progress[]> mFlowable2;    public RxAsyncTask() {    }    @SafeVarargs    private final void rxTask(final Param... params) {       Flowable.create(new FlowableOnSubscribe<Result>() {            @Override            public void subscribe(FlowableEmitter<Result> e) throws Exception {                e.onNext(RxAsyncTask.this.call(params));                e.onComplete();            }        }, BackpressureStrategy.BUFFER).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread())                .subscribe(new Subscriber<Result>() {                    @Override                    public void onSubscribe(Subscription s) {                        s.request(Long.MAX_VALUE);                    }                    @Override                    public void onNext(Result result) {                        RxAsyncTask.this.onResult(result);                    }                    @Override                    public void onError(Throwable t) {                        RxAsyncTask.this.onError(t);                    }                    @Override                    public void onComplete() {                        RxAsyncTask.this.onCompleted();                    }                });    }    protected abstract Result call(Param... params);    /**任务开始之前调用(在当前调用者所在线程执行)*/    protected void onPreExecute() {    }    /** 执行结果返回*/    protected void onResult(Result result) {    }    /**进度更新*/    protected void onProgressUpdate(Progress... progresses) {    }    /**RxJava中的onComplete回调*/    protected void onCompleted() {    }    /**RxJava中的onError回调*/    protected void onError(Throwable e) {    }    /**进度更新 子线程转主线程 回调给 onProgressUpdate()方法*/    protected void publishProgress(final Progress... progresses) {        if (mFlowable2 == null) {            mFlowable2 = Flowable.create(new FlowableOnSubscribe<Progress[]>() {                @Override                public void subscribe(FlowableEmitter<Progress[]> e) throws Exception {                    e.onNext(progresses);                }            }, BackpressureStrategy.BUFFER).observeOn(AndroidSchedulers.mainThread());        }        mFlowable2.subscribe(new Consumer<Progress[]>() {            @Override            public void accept(Progress[] progress) throws Exception {                onProgressUpdate(progresses);            }        });    }    @SafeVarargs    public final void execute(Param... params) {        onPreExecute();        rxTask(params);    }}

MainActivity使用RxAsyncTask，跟AsyncTask类似需要的方法可以重写父类方法：

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final TextView text= (TextView) findViewById(R.id.test);        new RxAsyncTask<String, Integer, String>() {            @Override            protected String call(String... param) {                Log.e("RxAsyncTask","call");                for (int i = 10; i >0; i--) {                    try {                        publishProgress(i);                        Thread.sleep(1000);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }                return param[0];            }            @Override            protected void onResult(String s) {                Log.e("RxAsyncTask","onNext");                Toast.makeText(MainActivity.this,s,Toast.LENGTH_SHORT).show();                text.setText(s);            }            @Override            protected void onPreExecute() {                Log.e("RxAsyncTask","onPreExecute");            }            @Override            protected void onProgressUpdate(Integer... integers) {                text.setText("2017倒数:"+integers[0]);                Log.e("RxAsyncTask","onProgressUpdate");            }            @Override            protected void onCompleted() {                Log.e("RxAsyncTask","onCompleted");            }            @Override            protected void onError(Throwable e) {                Log.e("RxAsyncTask","onError");            }        }.execute("Happy New Year 2017");    }}

效果模拟器太卡了是10开始倒数的

Demo：http://download.csdn.net/detail/hqiong208/9726525

有待完善

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