RxJava+RxAndroid+OKHTTP实现get post 以及下载图片功能

来源：互联网发布：威廉·密里根知乎编辑：程序博客网时间：2024/06/06 00:33

RxJava+RxAndroid+OKHTTP项目一

开发环境AndroidStudio

1.配置jar

compile 'io.reactivex:rxjava:1.3.2'compile 'io.reactivex:rxandroid:1.2.1'compile 'com.squareup.okhttp3:okhttp:3.9.0'

2.常量类设置超时时间

public class ROConstants {    public static final long timeout=20;//超时时间20秒}

3.工具类获取 OkHttpClient 对象封装get post请求

package com.wjn.rxandroidokhttpdemo.utils;import com.wjn.rxandroidokhttpdemo.constants.ROConstants;import java.io.IOException;import java.util.Map;import java.util.concurrent.TimeUnit;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;import rx.Observable;import rx.Subscriber;/** * Created by Administrator on 2017/9/22. * RxAndroid结合OkHttp 工具类 单例 */public class RxAndroidOkhttp {    private OkHttpClient mOkHttpClient=null;//OkHttpClient 对象    private static RxAndroidOkhttp mRxAndroidOkhttp=null;//RxAndroidOkhttp 对象    /**     * 构造方法私有化     * */    private RxAndroidOkhttp(){        //创建okhttp对象        mOkHttpClient=new OkHttpClient();        //设置连接超时时间为20s        mOkHttpClient.newBuilder()                .connectTimeout(ROConstants.timeout, TimeUnit.SECONDS)//连接时间                .readTimeout(ROConstants.timeout,TimeUnit.SECONDS)//读时间                .writeTimeout(ROConstants.timeout,TimeUnit.SECONDS);//写时间    }    /**     * 获取此单例类对象的方法     * */    public static RxAndroidOkhttp getInstance(){        if(null==mRxAndroidOkhttp){//单例对象为空            synchronized (RxAndroidOkhttp.class){                mRxAndroidOkhttp=new RxAndroidOkhttp();            }        }        return mRxAndroidOkhttp;    }    /**     * get请求方法     * */    public Observable<String> get(final String url){        //创建被观察者        Observable<String> observable = Observable.create(new Observable.OnSubscribe<String>(){            @Override            public void call(Subscriber<? super String> subscriber) {                final Subscriber mSubscriber=subscriber;                //没有取消订阅的时候                if(!mSubscriber.isUnsubscribed()){                    //get请求                    Request request=new Request.Builder().url(url).get().build();                    if(null!=mOkHttpClient){                        mOkHttpClient.newCall(request).enqueue(new Callback() {                            @Override                            public void onFailure(Call call, IOException e) {                                //通知订阅者的错误信息                                mSubscriber.onError(e);                            }                            @Override                            public void onResponse(Call call, Response response) throws IOException {                                if (null != response && response.isSuccessful()) {                                    //通知订阅者的成功信息                                    mSubscriber.onNext(response.body().string());                                }                                //通知完毕                                mSubscriber.onCompleted();                            }                        });                    }                }            }        });        return observable;    }    /**     * post请求方法     * */    public Observable<String> post(final String url, final Map<String,String> params){        //创建被观察者        Observable<String> observable = Observable.create(new Observable.OnSubscribe<String>(){            @Override            public void call(Subscriber<? super String> subscriber) {                final Subscriber mSubscriber=subscriber;                //没有取消订阅的时候                if(!mSubscriber.isUnsubscribed()){                    //获取FormBody.Builder 对象                    FormBody.Builder builder=new FormBody.Builder();                    //遍历params 将其放入到FormBody.Builder 对象                    if(params!=null&&!params.isEmpty()){                        for(Map.Entry<String, String> entry :params.entrySet()){                            builder.add(entry.getKey(), entry.getValue());                        }                    }                    //获取RequestBody 对象                    RequestBody requestBody = builder.build();                    //构建post请求                    Request request=new Request.Builder().url(url).post(requestBody).build();                    if(mOkHttpClient!=null){                        mOkHttpClient.newCall(request).enqueue(new Callback() {                            @Override                            public void onFailure(Call call, IOException e) {                                //通知订阅者的错误信息                                mSubscriber.onError(e);                            }                            @Override                            public void onResponse(Call call, Response response) throws IOException {                                if(null!=response&&response.isSuccessful()){                                    //通知订阅者的成功信息                                    mSubscriber.onNext(response.body().string());                                }                                //通知完毕                                mSubscriber.onCompleted();                            }                        });                    }                }            }        });        return observable;    }    /**     * 下载图片     * */    public Observable<byte[]> loadImageViewByUrl(final String url){        //创建被观察者        Observable<byte[]> observable=Observable.create(new Observable.OnSubscribe<byte[]>(){            @Override            public void call(Subscriber<? super byte[]> subscriber) {                final Subscriber mSubscriber=subscriber;                //没有取消订阅的时候                if(!mSubscriber.isUnsubscribed()){                    //网络请求请求                    Request request=new Request.Builder().url(url).get().build();                    if(null!=mOkHttpClient){                        mOkHttpClient.newCall(request).enqueue(new Callback() {                            @Override                            public void onFailure(Call call, IOException e) {                                //通知订阅者的错误信息                                mSubscriber.onError(e);                            }                            @Override                            public void onResponse(Call call, Response response) throws IOException {                                if(null!=response&&response.isSuccessful()){                                    //通知订阅者的成功信息                                    byte[] data=response.body().bytes();                                    if (data != null) {                                        mSubscriber.onNext(data);                                    }                                }                                //通知完毕                                mSubscriber.onCompleted();                            }                        });                    }                }            }        });        return observable;    }}

4.实现activity

package com.wjn.rxandroidokhttpdemo.activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.ImageView;import android.widget.TextView;import com.wjn.rxandroidokhttpdemo.R;import com.wjn.rxandroidokhttpdemo.utils.RxAndroidOkhttp;import java.util.HashMap;import java.util.Map;import rx.Observable;import rx.Subscriber;import rx.android.schedulers.AndroidSchedulers;import rx.schedulers.Schedulers;public class MainActivity extends AppCompatActivity implements View.OnClickListener{    private TextView gettextview;    private TextView posttextview;    private TextView loadimageviewtextview;    private ImageView imageview;    private TextView resulttextview;    private RxAndroidOkhttp mRxAndroidOkhttp=null;//RxAndroidOkhttp对象    private Observable<String> mObservable=null;//get post 方式请求的Observable对象    private Observable<byte[]> mimgObservable=null;//下载图片的Observable    private String geturl="http://fanyi.youdao.com/openapi.do?keyfrom=imoocdict123456&key=324273592&type=data&doctype=json&version=1.1&q=blue";//get方式的请求路径    private String posturl="http://fanyi.youdao.com/openapi.do";//post方式的请求路径    private String imageviewurl="http://upload.site.cnhubei.com/2016/0117/1453000952567.jpg";//下载图片的路径    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    /**     * 初始化各种View的方法     * */    private void initView(){        gettextview= (TextView) findViewById(R.id.activity_main_gettextview);        posttextview= (TextView) findViewById(R.id.activity_main_posttextview);        loadimageviewtextview= (TextView) findViewById(R.id.activity_main_loadimageviewtextview);        imageview= (ImageView) findViewById(R.id.activity_main_loadimageviewimageview);        resulttextview= (TextView) findViewById(R.id.activity_mainresulttextview);        gettextview.setOnClickListener(this);        posttextview.setOnClickListener(this);        loadimageviewtextview.setOnClickListener(this);        mRxAndroidOkhttp=RxAndroidOkhttp.getInstance();    }    /**     * 各种点击事件的方法     * */    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.activity_main_gettextview://get方式获取数据                if(null!=mRxAndroidOkhttp){                    resulttextview.setText("数据加载中...");                    //observable定义被观察者                    mObservable=mRxAndroidOkhttp.get(geturl);                    if(null!=mObservable){                        //定义观察者                        Subscriber<String> mSubscriber=new Subscriber<String>(){                            @Override                            public void onCompleted() {                                Log.d("MainActivity","get----onCompleted方法！！！");                            }                            @Override                            public void onError(Throwable e) {                                resulttextview.setText(e.getMessage());                                Log.d("MainActivity","get----onError方法！！！e.toString()----："+e.toString());                            }                            @Override                            public void onNext(String s) {                                Log.d("MainActivity","get----onNext方法！！！s----："+s);                                resulttextview.setText("get方式请求结果：\n"+s);                            }                        };                        /**                         * 订阅者关联被观察者                         * Schedulers.io()说明是输入输出的计划任务                         * AndroidSchedulers.mainThread()说明订阅者是中ui主线程中执行                         * */                        mObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(mSubscriber);                    }                }                break;            case R.id.activity_main_posttextview://post方式获取数据                if(null!=mRxAndroidOkhttp){                    Map<String, String> params = new HashMap<>();                    params.put("keyfrom", "imoocdict123456");                    params.put("key", "324273592");                    params.put("type", "data");                    params.put("doctype", "json");                    params.put("version", "1.1");                    params.put("q", "red");                    resulttextview.setText("数据加载中...");                    //observable定义被观察者                    mObservable=mRxAndroidOkhttp.post(posturl,params);                    if(null!=mObservable){                        //定义观察者                        Subscriber<String> mSubscriber=new Subscriber<String>(){                            @Override                            public void onCompleted() {                                Log.d("MainActivity","post----onCompleted方法！！！");                            }                            @Override                            public void onError(Throwable e) {                                resulttextview.setText(e.getMessage());                                Log.d("MainActivity","post----onError方法！！！e.toString()----："+e.toString());                            }                            @Override                            public void onNext(String s) {                                Log.d("MainActivity","post----onNext方法！！！s----："+s);                                resulttextview.setText("post方式请求结果：\n"+s);                            }                        };                        /**                         * 订阅者关联被观察者                         * Schedulers.io()说明是输入输出的计划任务                         * AndroidSchedulers.mainThread()说明订阅者是中ui主线程中执行                         * */                        mObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(mSubscriber);                    }                }                break;            case R.id.activity_main_loadimageviewtextview://下载图片                if(null!=mRxAndroidOkhttp){                    loadimageviewtextview.setText("下载中...");                    //observable定义被观察者                    mimgObservable=mRxAndroidOkhttp.loadImageViewByUrl(imageviewurl);                    //定义观察者                    Subscriber<byte[]> mSubscriber=new Subscriber<byte[]>(){                        @Override                        public void onCompleted() {                            Log.d("MainActivity","loadimagview----onCompleted方法！！！");                        }                        @Override                        public void onError(Throwable e) {                            loadimageviewtextview.setText(e.getMessage());                            Log.d("MainActivity","loadimageview----onError方法！！！e.toString()----："+e.toString());                        }                        @Override                        public void onNext(byte[] bytes) {                            Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);                            if((null!=bitmap)&&(!bitmap.isRecycled())){                                imageview.setImageBitmap(bitmap);                            }                            loadimageviewtextview.setText("下载图片");                        }                    };                    /**                     * 订阅者关联被观察者                     * Schedulers.io()说明是输入输出的计划任务                     * AndroidSchedulers.mainThread()说明订阅者是中ui主线程中执行                     * */                    mimgObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(mSubscriber);                }                break;        }    }}

希望对你有所帮助。。。

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