RxJava结合ProgressDialog实现请求数据

先看效果图

接下来看代码
1.请求接口

public interface MovieService {//        @GET("top250")//https://api.douban.com/v2/movie/top250?start=0&count=10//        Call<MovieInfo> getMovieInfo(@Query("start") int start, @Query("count") int count);//         @GET("top250")//         rx.Observable<MovieInfo> getMovieInfo2(@Query("start") int start, @Query("count") int count);        @GET("top250")        Observable<HttpResult<List<MovieInfo.SubjectsBean>>> getMovieInfo3(@Query("start") int start, @Query("count") int count);}

2.ProgressHandler

public class ProgressHandler extends Handler {    public static final int SHOW_PROGRESS = 0;    public static final int DISMISS_PROGRESS = 1;    private ProgressDialog pd;    private Context mContext;    private ProgressCancelListener mProgressCancelListener;    private boolean cancelable;    public ProgressHandler(Context context, ProgressCancelListener listener,boolean cancelable){        this.mContext = context;        mProgressCancelListener = listener;        this.cancelable = cancelable;    }    public void initProgressDialog(){        if(pd == null){            pd = new ProgressDialog(mContext);            pd.setCancelable(cancelable);            if(cancelable){                pd.setOnCancelListener(new DialogInterface.OnCancelListener() {                    @Override                    public void onCancel(DialogInterface dialog) {                        mProgressCancelListener.onProgressCanceled();                    }                });            }            if(!pd.isShowing()){                pd.show();//显示进度条            }        }    }    public void dismissProgressDialog(){        if(pd!=null){            pd.dismiss();//取消进度条            pd = null;        }    }    @Override    public void handleMessage(Message msg) {        super.handleMessage(msg);        switch(msg.what){            case SHOW_PROGRESS:                initProgressDialog();            break;            case DISMISS_PROGRESS:                dismissProgressDialog();            break;        }    }}

3.ProgressSubscribe

public class ProgressSubscribe<T> extends Subscriber<T> implements ProgressCancelListener {    private SubscribeOnNextListener mOnNextListener;    private Context mContext;    private ProgressHandler mProgressHandler;    public ProgressSubscribe(SubscribeOnNextListener listener, Context context){        this.mOnNextListener = listener;        mContext = context;        mProgressHandler = new ProgressHandler(mContext,this,true);    }    public void showProgressDialog(){        if(mProgressHandler!=null){            mProgressHandler.obtainMessage(ProgressHandler.SHOW_PROGRESS).sendToTarget();        }    }    public void disMissProgressDialog(){        if(mProgressHandler!=null){            mProgressHandler.obtainMessage(ProgressHandler.DISMISS_PROGRESS).sendToTarget();            mProgressHandler = null;        }    }    @Override    public void onStart() {        super.onStart();        showProgressDialog();    }    @Override    public void onCompleted() {        disMissProgressDialog();    }    @Override    public void onError(Throwable e) {      disMissProgressDialog();    }    @Override    public void onNext(Object o) {        mOnNextListener.onNext(o);//回调MainActivity中的onNext方法    }    @Override    public void onProgressCanceled() {//取消请求        if(!this.isUnsubscribed()){            unsubscribe();        }    }}

4.RetrofitClient

public class RetrofitClient {    private Retrofit mRetrofit;    private final MovieService mMovieService;    public RetrofitClient(){        mRetrofit = new Retrofit.Builder().baseUrl("https://api.douban.com/v2/movie/")                .addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                .build();        mMovieService = mRetrofit.create(MovieService.class);    }    public static RetrofitClient getInstance(){        return RetrofitHolder.sClient;    }    public static class RetrofitHolder{        private static RetrofitClient sClient = new RetrofitClient();    }    public<T> T create(Class<T> clazz){        return mRetrofit.create(clazz);    }//    public void getMovieInfo(Subscriber<MovieInfo> subscriber,int start,int count){//        mMovieService.getMovieInfo2(start,count)//                .subscribeOn(Schedulers.io())//                .observeOn(AndroidSchedulers.mainThread())//                .subscribe(subscriber);//    }    /**     * 用来统一处理Htpp的resultCode,并将data部分的数据剥离出来给Subscriber     * @param <T> Subscribe真正需要的数据类型     */     class HttpResultFunc<T> implements Func1<HttpResult<T>,T>{        @Override        public T call(HttpResult<T> tHttpResult) {            if(tHttpResult.resultCode!=0){//                throw new ApiException            }            return tHttpResult.subjects;        }    }    public void getMovieInfo(Subscriber<List<MovieInfo.SubjectsBean>> subscriber, int start, int count){        mMovieService.getMovieInfo3(start,count)                .map(new HttpResultFunc<List<MovieInfo.SubjectsBean>>())                .subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(subscriber);    }}

5.SubscribeOnNextListener

//接口，用来回调public interface SubscribeOnNextListener<T> {    void onNext(T t);}

6.ProgressCancelListener

//接口，用来取消进度条public interface ProgressCancelListener {    void onProgressCanceled();}

7.MainActivity

public class MainActivity extends AppCompatActivity {    @Bind(R.id.textview)    TextView mTextview;    @Bind(R.id.button)    Button mButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ButterKnife.bind(this);    }    @OnClick(R.id.button)    public void click() {        getMovie();    }    public void getMovie() {        RetrofitClient.getInstance().getMovieInfo                (new ProgressSubscribe<List<MovieInfo.SubjectsBean>>(mOnNextListener,this),0,10);    }    SubscribeOnNextListener<List<MovieInfo.SubjectsBean>> mOnNextListener = new SubscribeOnNextListener<List<MovieInfo.SubjectsBean>>() {        @Override        public void onNext(List<MovieInfo.SubjectsBean> o) {            mTextview.setText(o.toString());        }    };}