{"id":786,"date":"2023-10-23T01:52:22","date_gmt":"2023-02-18T07:07:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/android%e7%9a%84rxjava%e5%92%8cretrofit\/"},"modified":"2025-08-03T07:49:11","modified_gmt":"2025-08-02T23:49:11","slug":"android%e7%9a%84rxjava%e5%92%8cretrofit","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/android%e7%9a%84rxjava%e5%92%8cretrofit\/","title":{"rendered":"Android\u5f00\u53d1\u5b9e\u6218\uff1aRxJava\u4e0eRetrofit\u5b8c\u7f8e\u7ed3\u5408\u7684\u7f51\u7edc\u8bf7\u6c42\u5904\u7406\u6307\u5357"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aAndroid\u7684RxJava\u548cRetrofit\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5\uff1a\u5728\u8fd9\u4e2a\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u5728Android\u5e94\u7528\u4e2d\u4f7f\u7528RxJava\u6765\u5b9e\u73b0Retrofit\u8c03\u7528\u3002\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u4f7f\u7528Retrofit\u548cRxJava\u6765\u586b\u5145RecyclerView\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u52a0\u5bc6\u8d27\u5e01API\u3002<\/p>\n<p>\u4f60\u5c06\u5b66\u5230\u4ec0\u4e48\uff1f<\/p>\n<ul class=\"post-ul\">\n<li>\u4f7f\u7528RxJava\u8fdb\u884cRetrofit\u8c03\u7528<\/li>\n<li>\u4f7f\u7528RxJava\u8fdb\u884c\u591a\u4e2aRetrofit\u8c03\u7528<\/li>\n<li>\u4f7f\u7528RxJava\u8f6c\u6362Retrofit\u7684POJO\u54cd\u5e94<\/li>\n<\/ul>\n<p>\u6211\u4eec\u7684\u5b89\u5353\u5e94\u7528\u5c06\u4f7f\u7528Java 8\u6765\u5f15\u5165lambda\u8868\u8fbe\u5f0f\u3002<\/p>\n<h2>\u603b\u89c8<\/h2>\n<p>Retrofit\u662f\u4e00\u4e2aREST\u5ba2\u6237\u7aef\uff0c\u5b83\u4f7f\u7528OkHttp\u4f5c\u4e3aHttpClient\u548cJSON\u89e3\u6790\u5668\u6765\u89e3\u6790\u54cd\u5e94\u3002\u6211\u4eec\u5728\u8fd9\u91cc\u5c06\u4f7f\u7528gson\u4f5c\u4e3aJSON\u89e3\u6790\u5668\u3002\u4ee5\u4e0b\u662f\u521b\u5efaRetrofit\u5b9e\u4f8b\u7684\u65b9\u6cd5\uff1a<\/p>\n<pre class=\"post-pre\"><code>HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();\r\n        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);\r\n        OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();\r\n\r\n        Gson gson = new GsonBuilder()\r\n                .setLenient()\r\n                .create();\r\n\r\n        Retrofit retrofit = new Retrofit.Builder()\r\n                .baseUrl(BASE_URL)\r\n                .client(client)\r\n                .addConverterFactory(GsonConverterFactory.create(gson))\r\n                .build();\r\n<\/code><\/pre>\n<p>\u4f7f\u7528HttpLoggingInterceptor\u6765\u8bb0\u5f55\u7f51\u7edc\u8c03\u7528\u8fc7\u7a0b\u4e2d\u7684\u6570\u636e\u3002RxJava\u662f\u4e00\u4e2a\u7528\u4e8e\u5f02\u6b65\u548c\u54cd\u5e94\u5f0f\u7f16\u7a0b\u7684\u5e93\uff0c\u4ee5\u6d41\u7684\u5f62\u5f0f\u5c55\u73b0\u3002\u5728RxJava\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e0d\u540c\u7684\u7ebf\u7a0b\u3002\u7f51\u7edc\u8c03\u7528\u4f7f\u7528\u540e\u53f0\u7ebf\u7a0b\uff0c\u66f4\u65b0UI\u4f7f\u7528\u4e3b\u7ebf\u7a0b\u3002\u5728RxJava\u4e2d\uff0cSchedulers\u8d1f\u8d23\u4f7f\u7528\u4e0d\u540c\u7684\u7ebf\u7a0b\u6267\u884c\u64cd\u4f5c\u3002RxAndroid\u662fRxJava\u7684\u6269\u5c55\uff0c\u5305\u542b\u4e86\u7528\u4e8e\u5728Android\u73af\u5883\u4e2d\u4f7f\u7528\u7684Android\u7ebf\u7a0b\u3002\u5728Retrofit\u73af\u5883\u4e2d\u4f7f\u7528RxJava\u53ea\u9700\u8981\u8fdb\u884c\u4e24\u4e2a\u4e3b\u8981\u7684\u66f4\u6539\u3002<\/p>\n<ul class=\"post-ul\">\n<li>\u5728Retrofit Builder\u4e2d\u6dfb\u52a0RxJava<\/li>\n<li>\u5728\u63a5\u53e3\u4e2d\u4f7f\u7528Observable\u7c7b\u578b\u4ee3\u66ffCall<\/li>\n<\/ul>\n<p>\u4f7f\u7528RxJava\u64cd\u4f5c\u7b26\u53ef\u4ee5\u8fdb\u884c\u591a\u4e2a\u8c03\u7528\u6216\u8005\u5bf9\u54cd\u5e94\u8fdb\u884c\u8f6c\u6362\u3002\u8ba9\u6211\u4eec\u6765\u770b\u770b\u901a\u8fc7\u4e0b\u9762\u7684\u793a\u4f8b\u5e94\u7528\u7a0b\u5e8f\u662f\u5982\u4f55\u5b8c\u6210\u7684\u3002<\/p>\n<h3>\u9879\u76ee\u7ed3\u6784<\/h3>\n<p>\u5728\u6211\u4eec\u7684build.gradle\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4f9d\u8d56\u9879\u3002<\/p>\n<pre class=\"post-pre\"><code>    implementation 'com.android.support:cardview-v7:27.1.0'\r\n    implementation 'com.android.support:design:27.1.0'\r\n    implementation('com.squareup.retrofit2:retrofit:2.3.0')\r\n            {\r\n                exclude module: 'okhttp'\r\n            }\r\n\r\n    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'\r\n    implementation 'io.reactivex.rxjava2:rxjava:2.1.9'\r\n    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'\r\n    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'\r\n    implementation 'com.squareup.okhttp3:logging-interceptor:3.9.1'\r\n<\/code><\/pre>\n<h3>\u4ee3\u7801<\/h3>\n<p>\u4ee5\u4e0b\u662factivity_main.xml\u5e03\u5c40\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;android.support.constraint.ConstraintLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:tools=\"https:\/\/schemas.android.com\/tools\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    tools:context=\".MainActivity\"&gt;\r\n\r\n    &lt;android.support.v7.widget.RecyclerView\r\n        android:id=\"@+id\/recyclerView\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"match_parent\" \/&gt;\r\n\r\n&lt;\/android.support.constraint.ConstraintLayout&gt;\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662fCryptocurrencyService.java\u7c7b\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.rxjavaretrofit;\r\n\r\nimport com.Olivia.rxjavaretrofit.pojo.Crypto;\r\n\r\nimport io.reactivex.Observable;\r\nimport retrofit2.http.GET;\r\nimport retrofit2.http.Path;\r\n\r\npublic interface CryptocurrencyService {\r\n\r\n\r\n    String BASE_URL = \"https:\/\/api.cryptonator.com\/api\/full\/\";\r\n\r\n    @GET(\"{coin}-usd\")\r\n    Observable&lt;Crypto&gt; getCoinData(@Path(\"coin\") String coin);\r\n}\r\n<\/code><\/pre>\n<p>@Path\u4f20\u9012\u6211\u4eec\u6307\u5b9a\u7684\u8def\u5f84\u8fdb\u5165\u82b1\u62ec\u53f7\u3002\u6ce8\u610f\uff1a@Path\u53c2\u6570\u7684\u540d\u79f0\u5fc5\u987b\u4e0e@GET\u4e2d\u7684\u4e00\u81f4\u3002\u4e0b\u9762\u662fPOJO\u7c7bCrypto.java\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.rxjavaretrofit.pojo;\r\n\r\nimport com.google.gson.annotations.SerializedName;\r\nimport java.util.List;\r\n\r\npublic class Crypto {\r\n\r\n    @SerializedName(\"ticker\")\r\n    public Ticker ticker;\r\n    @SerializedName(\"timestamp\")\r\n    public Integer timestamp;\r\n    @SerializedName(\"success\")\r\n    public Boolean success;\r\n    @SerializedName(\"error\")\r\n    public String error;\r\n\r\n\r\n    public class Market {\r\n\r\n        @SerializedName(\"market\")\r\n        public String market;\r\n        @SerializedName(\"price\")\r\n        public String price;\r\n        @SerializedName(\"volume\")\r\n        public Float volume;\r\n\r\n        public String coinName;\r\n\r\n    }\r\n\r\n    public class Ticker {\r\n\r\n        @SerializedName(\"base\")\r\n        public String base;\r\n        @SerializedName(\"target\")\r\n        public String target;\r\n        @SerializedName(\"price\")\r\n        public String price;\r\n        @SerializedName(\"volume\")\r\n        public String volume;\r\n        @SerializedName(\"change\")\r\n        public String change;\r\n        @SerializedName(\"markets\")\r\n        public List&lt;Market&gt; markets = null;\r\n\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>coinName\u662f\u6211\u4eec\u8bbe\u7f6e\u7684\u4e00\u4e2a\u5b57\u6bb5\u3002\u501f\u52a9\u4e8eRxJava\u7684\u9b54\u529b\uff0c\u6211\u4eec\u5c06\u5728\u8fd9\u4e2a\u5b57\u6bb5\u4e0a\u8bbe\u7f6e\u4e00\u4e2a\u503c\u6765\u8f6c\u6362\u54cd\u5e94\u3002<\/p>\n<h3>\u4f7f\u7528RxJava\u521b\u5efa\u4e00\u4e2a\u5355\u4e00\u7684\u8c03\u7528<\/h3>\n<pre class=\"post-pre\"><code>CryptocurrencyService cryptocurrencyService = retrofit.create(CryptocurrencyService.class);\r\n        \r\nObservable&lt;Crypto&gt; cryptoObservable = cryptocurrencyService.getCoinData(\"btc\");\r\ncryptoObservable.subscribeOn(Schedulers.io())\r\n.observeOn(AndroidSchedulers.mainThread())\r\n.map(result -&gt; result.ticker)\r\n.subscribe(this::handleResults, this::handleError);\r\n<\/code><\/pre>\n<p>subscribeOn() \u521b\u5efa\u4e00\u4e2a\u8c03\u5ea6\u7ebf\u7a0b\uff0c\u7528\u4e8e\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u5176\u4e2d\u4f20\u9012\u4ee5\u4e0b\u4efb\u4f55\u8c03\u5ea6\u5668\u3002<\/p>\n<ul class=\"post-ul\">\n<li>trampoline(): \u5728\u5f53\u524d\u7ebf\u7a0b\u4e0a\u8fd0\u884c\u4efb\u52a1\u3002\u56e0\u6b64\u5b83\u4f1a\u5728\u5f53\u524d\u7ebf\u7a0b\u4e0a\u7684\u4efb\u52a1\u5b8c\u6210\u540e\u8fd0\u884c\u4f60\u7684\u4ee3\u7801\u3002\u5bf9\u4e8e\u6392\u961f\u64cd\u4f5c\u5f88\u6709\u7528\u3002<\/li>\n<li>newThread(): \u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a\u4e3a\u6bcf\u4e2a\u5de5\u4f5c\u5355\u5143\u521b\u5efa\u65b0\u7ebf\u7a0b\u7684\u8c03\u5ea6\u5668\u3002\u7531\u4e8e\u6bcf\u6b21\u90fd\u521b\u5efa\u5355\u72ec\u7684\u7ebf\u7a0b\uff0c\u8fd9\u662f\u5f88\u8017\u8d39\u8d44\u6e90\u7684\u3002<\/li>\n<li>computation(): \u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u5de5\u4f5c\u7684\u8c03\u5ea6\u5668\u3002\u7531\u4e8e\u7ebf\u7a0b\u6c60\u662f\u53d7\u9650\u5236\u7684\uff0c\u5e94\u8be5\u7528\u4e8e\u5e76\u884c\u5de5\u4f5c\u3002\u4e0d\u5e94\u8be5\u5728\u8fd9\u91cc\u6267\u884cI\/O\u64cd\u4f5c\u3002<\/li>\n<li>io(): \u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a\u7528\u4e8eI\/O\u7ed1\u5b9a\u5de5\u4f5c\u7684\u8c03\u5ea6\u5668\u3002\u5b83\u50cfcomputation\u4e00\u6837\u662f\u53d7\u9650\u5236\u7684\u3002\u901a\u5e38\u7528\u4e8e\u7f51\u7edc\u8c03\u7528\u3002<\/li>\n<\/ul>\n<h3>subscribeOn()\u548cobserveOn()\u7684\u533a\u522b<\/h3>\n<ul class=\"post-ul\">\n<li>subscribeOn \u5728\u4e0a\u6e38\u548c\u4e0b\u6e38\u90fd\u8d77\u4f5c\u7528\u3002\u5b83\u4e0a\u65b9\u548c\u4e0b\u65b9\u7684\u6240\u6709\u4efb\u52a1\u90fd\u5c06\u4f7f\u7528\u540c\u4e00\u7ebf\u7a0b\u3002<\/li>\n<li>observeOn \u4ec5\u5728\u4e0b\u6e38\u8d77\u4f5c\u7528\u3002<\/li>\n<li>\u8fde\u7eed\u7684 subscribeOn \u65b9\u6cd5\u4e0d\u4f1a\u6539\u53d8\u7ebf\u7a0b\u3002\u53ea\u6709\u7b2c\u4e00\u4e2a subscribeOn \u7ebf\u7a0b\u4f1a\u88ab\u4f7f\u7528\u3002<\/li>\n<li>\u8fde\u7eed\u7684 observeOn \u65b9\u6cd5\u4f1a\u6539\u53d8\u7ebf\u7a0b\u3002<\/li>\n<li>\u5728 observeOn() \u4e4b\u540e\u653e\u7f6e subscribeOn() \u4e0d\u4f1a\u6539\u53d8\u7ebf\u7a0b\u3002\u56e0\u6b64 observeOn \u901a\u5e38\u5e94\u8be5\u653e\u5728 subscribeOn \u4e4b\u540e\u3002<\/li>\n<\/ul>\n<p>AndroidSchedulers.mainThread() \u662f RxAndroid \u7684\u4e00\u90e8\u5206\uff0c\u7528\u4e8e\u4ec5\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u89c2\u5bdf\u6570\u636e\u3002subscribe \u65b9\u6cd5\u662f\u89e6\u53d1 retrofit \u8c03\u7528\u5e76\u5728 handleResults \u65b9\u6cd5\u4e2d\u83b7\u53d6\u6570\u636e\u7684\u65b9\u5f0f\uff0c\u6211\u4eec\u5f88\u5feb\u5c31\u4f1a\u770b\u5230\u3002<\/p>\n<h3>\u591a\u4e2a\u7f51\u7edc\u8bf7\u6c42<\/h3>\n<p>\u6211\u4eec\u4f7f\u7528 RxJava \u64cd\u4f5c\u7b26 merge \u6765\u4f9d\u6b21\u6267\u884c\u4e24\u4e2a retrofit \u8c03\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code>Observable&lt;List&lt;Crypto.Market&gt;&gt; btcObservable = cryptocurrencyService.getCoinData(\"btc\");\r\n\r\nObservable&lt;List&lt;Crypto.Market&gt;&gt; ethObservable = cryptocurrencyService.getCoinData(\"eth\");\r\n\r\nObservable.merge(btcObservable, ethObservable)\r\n                .subscribeOn(Schedulers.computation())\r\n                .observeOn(AndroidSchedulers.mainThread())\r\n                .subscribe(this::handleResults, this::handleError);\r\n<\/code><\/pre>\n<h3>\u8f6c\u6362\u54cd\u5e94<\/h3>\n<p>\u8981\u8f6c\u6362 POJO \u54cd\u5e94\uff0c\u6211\u4eec\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre class=\"post-pre\"><code>Observable&lt;List&lt;Crypto.Market&gt;&gt; btcObservable = cryptocurrencyService.getCoinData(\"btc\")\r\n                .map(result -&gt; Observable.fromIterable(result.ticker.markets))\r\n                .flatMap(x -&gt; x).filter(y -&gt; {\r\n                    y.coinName = \"btc\";\r\n                    return true;\r\n                }).toList().toObservable();\r\n\r\n        Observable&lt;List&lt;Crypto.Market&gt;&gt; ethObservable = cryptocurrencyService.getCoinData(\"eth\")\r\n                .map(result -&gt; Observable.fromIterable(result.ticker.markets))\r\n                .flatMap(x -&gt; x).filter(y -&gt; {\r\n                    y.coinName = \"eth\";\r\n                    return true;\r\n                }).toList().toObservable();\r\n\r\n        Observable.merge(btcObservable, ethObservable)\r\n                .subscribeOn(Schedulers.computation())\r\n                .observeOn(AndroidSchedulers.mainThread())\r\n                .subscribe(this::handleResults, this::handleError);\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u4f7f\u7528 Observable.fromIterable \u5c06 map \u7ed3\u679c\u8f6c\u6362\u4e3a Observable \u6d41\u3002flatMap \u9010\u4e2a\u64cd\u4f5c\u5143\u7d20\u3002\u56e0\u6b64\u5c06 ArrayList \u8f6c\u6362\u4e3a\u5355\u4e2a\u5143\u7d20\u3002\u5728 filter \u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u6539\u53d8\u4e86\u54cd\u5e94\u3002toList() \u7528\u4e8e\u5c06 flatMap \u7684\u7ed3\u679c\u8f6c\u6362\u56de List\u3002toObservable() \u5c06\u5b83\u4eec\u5305\u88c5\u6210 Observable \u6d41\u3002<\/p>\n<h3>\u4e3b\u6d3b\u52a8.java<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aAndroid\u7684RxJava\u548cRetrofit\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u7ed9\u51fa\u4e86MainActivity.java\u7c7b\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.rxjavaretrofit;\r\n\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.os.Bundle;\r\nimport android.support.v7.widget.LinearLayoutManager;\r\nimport android.support.v7.widget.RecyclerView;\r\nimport android.util.Log;\r\nimport android.widget.Toast;\r\n\r\nimport com.google.gson.Gson;\r\nimport com.google.gson.GsonBuilder;\r\nimport com.Olivia.rxjavaretrofit.pojo.Crypto;\r\n\r\nimport java.util.List;\r\n\r\nimport io.reactivex.Observable;\r\nimport io.reactivex.android.schedulers.AndroidSchedulers;\r\nimport io.reactivex.schedulers.Schedulers;\r\nimport okhttp3.OkHttpClient;\r\nimport okhttp3.logging.HttpLoggingInterceptor;\r\nimport retrofit2.Retrofit;\r\nimport retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;\r\nimport retrofit2.converter.gson.GsonConverterFactory;\r\n\r\nimport static com.Olivia.rxjavaretrofit.CryptocurrencyService.BASE_URL;\r\n\r\npublic class MainActivity extends AppCompatActivity {\r\n\r\n    RecyclerView recyclerView;\r\n    Retrofit retrofit;\r\n    RecyclerViewAdapter recyclerViewAdapter;\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_main);\r\n\r\n        recyclerView = findViewById(R.id.recyclerView);\r\n        recyclerView.setLayoutManager(new LinearLayoutManager(this));\r\n        recyclerViewAdapter = new RecyclerViewAdapter();\r\n        recyclerView.setAdapter(recyclerViewAdapter);\r\n\r\n\r\n        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();\r\n        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);\r\n        OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();\r\n\r\n        Gson gson = new GsonBuilder()\r\n                .setLenient()\r\n                .create();\r\n\r\n        retrofit = new Retrofit.Builder()\r\n                .baseUrl(BASE_URL)\r\n                .client(client)\r\n                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())\r\n                .addConverterFactory(GsonConverterFactory.create(gson))\r\n                .build();\r\n\r\n\r\n        callEndpoints();\r\n    }\r\n\r\n    private void callEndpoints() {\r\n\r\n        CryptocurrencyService cryptocurrencyService = retrofit.create(CryptocurrencyService.class);\r\n\r\n        \/\/\u5355\u4e00\u8c03\u7528\r\n        \/*Observable&lt;Crypto&gt; cryptoObservable = cryptocurrencyService.getCoinData(\"btc\");\r\n        cryptoObservable.subscribeOn(Schedulers.newThread()).observeOn(AndroidSchedulers.mainThread()).map(result -&gt; result.ticker).subscribe(this::handleResults, this::handleError);*\/\r\n\r\n        Observable&lt;List&lt;Crypto.Market&gt;&gt; btcObservable = cryptocurrencyService.getCoinData(\"btc\")\r\n                .map(result -&gt; Observable.fromIterable(result.ticker.markets))\r\n                .flatMap(x -&gt; x).filter(y -&gt; {\r\n                    y.coinName = \"btc\";\r\n                    return true;\r\n                }).toList().toObservable();\r\n\r\n        Observable&lt;List&lt;Crypto.Market&gt;&gt; ethObservable = cryptocurrencyService.getCoinData(\"eth\")\r\n                .map(result -&gt; Observable.fromIterable(result.ticker.markets))\r\n                .flatMap(x -&gt; x).filter(y -&gt; {\r\n                    y.coinName = \"eth\";\r\n                    return true;\r\n                }).toList().toObservable();\r\n\r\n        Observable.merge(btcObservable, ethObservable)\r\n                .subscribeOn(Schedulers.computation())\r\n                .observeOn(AndroidSchedulers.mainThread())\r\n                .subscribe(this::handleResults, this::handleError);\r\n\r\n\r\n\r\n    }\r\n\r\n\r\n    private void handleResults(List&lt;Crypto.Market&gt; marketList) {\r\n        if (marketList != null &amp;&amp; marketList.size() != 0) {\r\n            recyclerViewAdapter.setData(marketList);\r\n\r\n\r\n        } else {\r\n            Toast.makeText(this, \"\u672a\u627e\u5230\u7ed3\u679c\",\r\n                    Toast.LENGTH_LONG).show();\r\n        }\r\n    }\r\n\r\n    private void handleError(Throwable t) {\r\n\r\n        Toast.makeText(this, \"\u83b7\u53d6API\u54cd\u5e94\u65f6\u51fa\u9519\uff0c\u8bf7\u91cd\u8bd5\",\r\n                Toast.LENGTH_LONG).show();\r\n    }\r\n\r\n}\r\n\r\n<\/code><\/pre>\n<p>\u5728Java 8\u4e2d\u4f7f\u7528::\u8c03\u7528handleResults\u548chandleError\uff0chandleResults\u4e2d\u6211\u4eec\u5c06\u8f6c\u6362\u540e\u7684\u54cd\u5e94\u8bbe\u7f6e\u5728RecyclerViewAdapter\u4e0a\u3002\u5982\u679c\u54cd\u5e94\u4e2d\u6709\u9519\u8bef\uff0c\u5219\u8c03\u7528handleError()\u3002\u4e0b\u9762\u662frecyclerview_item_layout\u5e03\u5c40\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;LinearLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:app=\"https:\/\/schemas.android.com\/apk\/res-auto\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"wrap_content\"&gt;\r\n\r\n    &lt;android.support.v7.widget.CardView\r\n        android:id=\"@+id\/cardView\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_gravity=\"center\"\r\n        android:layout_margin=\"16dp\"&gt;\r\n\r\n        &lt;android.support.constraint.ConstraintLayout\r\n            android:layout_width=\"match_parent\"\r\n            android:layout_height=\"wrap_content\"\r\n            android:padding=\"8dp\"&gt;\r\n\r\n            &lt;TextView\r\n                android:id=\"@+id\/txtCoin\"\r\n                android:layout_width=\"wrap_content\"\r\n                android:layout_height=\"wrap_content\"\r\n                android:layout_marginLeft=\"8dp\"\r\n                android:layout_marginRight=\"8dp\"\r\n                android:layout_marginTop=\"8dp\"\r\n                android:textAllCaps=\"true\"\r\n                android:textColor=\"@android:color\/black\"\r\n                app:layout_constraintHorizontal_bias=\"0.023\"\r\n                app:layout_constraintLeft_toLeftOf=\"parent\"\r\n                app:layout_constraintRight_toRightOf=\"parent\"\r\n                app:layout_constraintTop_toTopOf=\"parent\" \/&gt;\r\n\r\n            &lt;TextView\r\n                android:id=\"@+id\/txtMarket\"\r\n                android:layout_width=\"wrap_content\"\r\n                android:layout_height=\"wrap_content\"\r\n                android:layout_marginLeft=\"8dp\"\r\n                android:layout_marginRight=\"8dp\"\r\n                android:layout_marginTop=\"8dp\"\r\n                app:layout_constraintHorizontal_bias=\"0.025\"\r\n                app:layout_constraintLeft_toLeftOf=\"parent\"\r\n                app:layout_constraintRight_toRightOf=\"parent\"\r\n                app:layout_constraintTop_toBottomOf=\"@+id\/txtCoin\" \/&gt;\r\n\r\n            &lt;TextView\r\n                android:id=\"@+id\/txtPrice\"\r\n                android:layout_width=\"wrap_content\"\r\n                android:layout_height=\"wrap_content\"\r\n                android:layout_marginLeft=\"8dp\"\r\n                android:layout_marginStart=\"8dp\"\r\n                android:layout_marginTop=\"8dp\"\r\n                app:layout_constraintHorizontal_bias=\"0.025\"\r\n                app:layout_constraintLeft_toLeftOf=\"parent\"\r\n                app:layout_constraintRight_toRightOf=\"parent\"\r\n                app:layout_constraintTop_toBottomOf=\"@+id\/txtMarket\" \/&gt;\r\n\r\n\r\n        &lt;\/android.support.constraint.ConstraintLayout&gt;\r\n    &lt;\/android.support.v7.widget.CardView&gt;\r\n&lt;\/LinearLayout&gt;\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662fRecyclerViewAdapter.java\u7c7b\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.rxjavaretrofit;\r\n\r\nimport android.graphics.Color;\r\nimport android.support.v4.content.ContextCompat;\r\nimport android.support.v7.widget.CardView;\r\nimport android.support.v7.widget.RecyclerView;\r\nimport android.view.LayoutInflater;\r\nimport android.view.View;\r\nimport android.view.ViewGroup;\r\nimport android.widget.TextView;\r\n\r\nimport com.Olivia.rxjavaretrofit.pojo.Crypto;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\npublic class RecyclerViewAdapter extends RecyclerView.Adapter&lt;RecyclerViewAdapter.ViewHolder&gt; {\r\n\r\n    private List&lt;Crypto.Market&gt; marketList;\r\n\r\n\r\n    public RecyclerViewAdapter() {\r\n        marketList = new ArrayList&lt;&gt;();\r\n    }\r\n\r\n    @Override\r\n    public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,\r\n                                                             int viewType) {\r\n\r\n        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item_layout, parent, false);\r\n\r\n        RecyclerViewAdapter.ViewHolder viewHolder = new RecyclerViewAdapter.ViewHolder(view);\r\n        return viewHolder;\r\n    }\r\n\r\n    @Override\r\n    public void onBindViewHolder(RecyclerViewAdapter.ViewHolder holder, int position) {\r\n        Crypto.Market market = marketList.get(position);\r\n        holder.txtCoin.setText(market.coinName);\r\n        holder.txtMarket.setText(market.market);\r\n        holder.txtPrice.setText(\"$\" + String.format(\"%.2f\", Double.parseDouble(market.price)));\r\n        if (market.coinName.equalsIgnoreCase(\"eth\")) {\r\n            holder.cardView.setCardBackgroundColor(Color.GRAY);\r\n        } else {\r\n            holder.cardView.setCardBackgroundColor(Color.GREEN);\r\n        }\r\n    }\r\n\r\n    @Override\r\n    public int getItemCount() {\r\n        return marketList.size();\r\n    }\r\n\r\n    public void setData(List&lt;Crypto.Market&gt; data) {\r\n        this.marketList.addAll(data);\r\n        notifyDataSetChanged();\r\n    }\r\n\r\n    public class ViewHolder extends RecyclerView.ViewHolder {\r\n\r\n        public TextView txtCoin;\r\n        public TextView txtMarket;\r\n        public TextView txtPrice;\r\n        public CardView cardView;\r\n\r\n        public ViewHolder(View view) {\r\n            super(view);\r\n\r\n            txtCoin = view.findViewById(R.id.txtCoin);\r\n            txtMarket = view.findViewById(R.id.txtMarket);\r\n            txtPrice = view.findViewById(R.id.txtPrice);\r\n            cardView = view.findViewById(R.id.cardView);\r\n        }\r\n    }\r\n}\r\n\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u5e94\u7528\u7a0b\u5e8f\u7684\u8f93\u51fa\u5982\u4e0b\uff1a\u4ee5\u4e0a\u8f93\u51fa\u5c06\u901a\u8fc7Retrofit\u5408\u5e76\u6bd4\u7279\u5e01\u548c\u4ee5\u592a\u574a\u5e02\u573a\u4ef7\u683c\u7684\u7ed3\u679c\u3002\u672c\u6559\u7a0b\u5230\u6b64\u7ed3\u675f\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u4e0b\u65b9\u94fe\u63a5\u4e0b\u8f7dAndroid RxJavaRetrofit\u9879\u76ee\u3002<\/p>\n<p>RxJavaRetrofit \u5728\u4e2d\u56fd\u7684\u672c\u5730\u5316\u7ffb\u8bd1\u53ef\u80fd\u662f\uff1a\u54cd\u5e94\u5f0fJava\u548c\u7f51\u7edc\u8bf7\u6c42\u5e93<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aAndroid\u7684RxJava\u548cRetrofit\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002 \u5185\u5bb9\u7247\u6bb5\uff1a\u5728\u8fd9\u4e2a\u6559\u7a0b\u4e2d\uff0c\u6211 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[900,2100,2099,757,1133],"class_list":["post-786","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-android","tag-retrofit","tag-rxjava","tag-757","tag-1133"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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property=\"og:title\" content=\"Android\u5f00\u53d1\u5b9e\u6218\uff1aRxJava\u4e0eRetrofit\u5b8c\u7f8e\u7ed3\u5408\u7684\u7f51\u7edc\u8bf7\u6c42\u5904\u7406\u6307\u5357\" \/>\n<meta property=\"og:description\" content=\"\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecdAndroid\u5f00\u53d1\u4e2d\u5982\u4f55\u7ed3\u5408\u4f7f\u7528RxJava\u548cRetrofit\u8fdb\u884c\u9ad8\u6548\u7684\u7f51\u7edc\u8bf7\u6c42\u5904\u7406\u3002\u5305\u542b\u5b9e\u9645\u4ee3\u7801\u793a\u4f8b\u3001\u6700\u4f73\u5b9e\u8df5\u548c\u5e38\u89c1\u95ee\u9898\u89e3\u51b3\u65b9\u6848\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u63d0\u5347Android\u5e94\u7528\u7684\u7f51\u7edc\u5c42\u6027\u80fd\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/android\u7684rxjava\u548cretrofit\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-18T07:07:39+00:00\" \/>\n<meta property=\"article:modified_time\" 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