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CharonChuiCharonChui
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update retrofit part
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‎Android加强/Retrofit详解(上).md‎

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@@ -42,55 +42,55 @@ https://api.github.com/users/{user}/repos
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```
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- `Retrofit`会将你的`api`封装成`Java`接口
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```java
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public interface GitHubService {
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@GET("users/{user}/repos")
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Call<List<Repo>> listRepos(@Path("user") String user);
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}
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```
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```java
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public interface GitHubService {
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@GET("users/{user}/repos")
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Call<List<Repo>> listRepos(@Path("user") String user);
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}
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```
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- `Retrofit`类会生成一个`GitHubService`接口的实现类:
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```java
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl("https://api.github.com/")
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.build();
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GitHubService service = retrofit.create(GitHubService.class);
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```
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```java
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl("https://api.github.com/")
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.build();
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GitHubService service = retrofit.create(GitHubService.class);
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```
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- 从创建的`GithubService`类返回的每个`Call`对象调用后都可以创建一个同步或异步的网络请求:
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```java
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Call<List<Repo>> repos = service.listRepos("CharonChui");
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```
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```java
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Call<List<Repo>> repos = service.listRepos("CharonChui");
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```
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- 上面返回的`Call`其实并不是真正的数据结果，它更像一条指令，你需要执行它:
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```java
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// 同步调用
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List<Repo> data = repos.execute();
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// 异步调用
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repos.enqueue(new Callback<List<Repo>>() {
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@Override
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public void onResponse(Call<List<Repo>> call, Response<List<Repo>> response) {
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List<Repo> data = response.body();
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Log.i("@@@", "data size : " + (data == null ? "null" : data.size() + ""));
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}
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@Override
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public void onFailure(Call<List<Repo>> call, Throwable t) {
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}
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});
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```
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```java
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// 同步调用
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List<Repo> data = repos.execute();
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// 异步调用
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repos.enqueue(new Callback<List<Repo>>() {
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@Override
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public void onResponse(Call<List<Repo>> call, Response<List<Repo>> response) {
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List<Repo> data = response.body();
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Log.i("@@@", "data size : " + (data == null ? "null" : data.size() + ""));
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}
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@Override
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public void onFailure(Call<List<Repo>> call, Throwable t) {
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}
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});
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```
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那如何取消请求呢？
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那如何取消请求呢？
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```java
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repos.cancel();
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```
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```java
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repos.cancel();
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```
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上面这一部分代码，你要是拷贝运行后是运行不了的。
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当然了，因为木有`Repo`对象。但是添加`Repo`对象也是运行不了的。会报错。
@@ -126,7 +126,7 @@ Caused by: java.lang.IllegalArgumentException: Unable to create converter for ja
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at android.app.Activity.performCreate(Activity.java:5304)
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at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)
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at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)
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... 12 more
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... 12 more
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Caused by: java.lang.IllegalArgumentException: Could not locate ResponseBody converter for java.util.List<com.charon.retrofitdemo.Repo>.
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Tried:
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```
@@ -230,7 +230,7 @@ Url = "https://api.github.com/users/CharonChui/repos"
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假设我们有一个分页查询的功能:
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```java
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@GET("/list")
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GET("/list")
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Call<ResponseBody> list(@Query("page") int page);
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```
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@@ -263,6 +263,7 @@ Call<User> updateUser(@Part("photo") RequestBody photo, @Part("description") Req
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```
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`@Headers`
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---
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可以通过`@Headers`来设置静态的请求头
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@@ -291,63 +292,64 @@ Call<User> getUser(@Header("Authorization") String authorization)
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- 添加依赖
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```java
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compile 'com.squareup.retrofit2:retrofit:2.1.0'
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compile 'com.squareup.retrofit2:converter-gson:2.1.0'// 支持gson
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compile 'com.squareup.retrofit2:adapter-rxjava:2.1.0'// 支持rxjava
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// rxjava part
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compile 'io.reactivex:rxandroid:1.2.1'
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compile 'io.reactivex:rxjava:1.2.3'
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```
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```java
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compile 'com.squareup.retrofit2:retrofit:2.1.0'
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compile 'com.squareup.retrofit2:converter-gson:2.1.0'// 支持gson
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compile 'com.squareup.retrofit2:adapter-rxjava:2.1.0'// 支持rxjava
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// rxjava part
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compile 'io.reactivex:rxandroid:1.2.1'
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compile 'io.reactivex:rxjava:1.2.3'
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```
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- 修改`Retrofit`的配置，让其支持`RxJava`
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```java
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl("https://api.github.com/")
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.addConverterFactory(GsonConverterFactory.create())
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.addCallAdapterFactory(RxJavaCallAdapterFactory.create()) // 支持RxJava
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.build();
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```
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```java
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl("https://api.github.com/")
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.addConverterFactory(GsonConverterFactory.create())
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.addCallAdapterFactory(RxJavaCallAdapterFactory.create()) // 支持RxJava
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.build();
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```
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- 修改`GitHubService`，将返回值改为`Observable`，而不是`Call`。
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```java
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public interface GitHubService {
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@GET("users/{user}/repos")
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Observable<List<Repo>> listRepos(@Path("user") String user);
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}
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```
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```java
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public interface GitHubService {
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@GET("users/{user}/repos")
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Observable<List<Repo>> listRepos(@Path("user") String user);
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}
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```
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- 执行部分
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```java
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GitHubService service = retrofit.create(GitHubService.class);
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service.listRepos("CharonChui")
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.subscribeOn(Schedulers.newThread())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(new Subscriber<List<Repo>>() {
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@Override
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public void onCompleted() {
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Log.i("@@@", "onCompleted");
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}
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@Override
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public void onError(Throwable e) {
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Log.i("@@@", "onError : " + e.toString());
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}
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@Override
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public void onNext(List<Repo> repos) {
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Log.i("@@@", "onNext : " + repos.size());
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Toast.makeText(MainActivity.this, "size : " + repos.size(), Toast.LENGTH_SHORT).show();
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}
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});
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```
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`RxJava`+`Retrofit`形式的时候，`Retrofit`把请求封装进`Observable`在请求结束后调用 `onNext()`或在请求失败后调用`onError()`。
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```java
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GitHubService service = retrofit.create(GitHubService.class);
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service.listRepos("CharonChui")
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.subscribeOn(Schedulers.newThread())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(new Subscriber<List<Repo>>() {
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@Override
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public void onCompleted() {
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Log.i("@@@", "onCompleted");
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}
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@Override
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public void onError(Throwable e) {
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Log.i("@@@", "onError : " + e.toString());
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}
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@Override
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public void onNext(List<Repo> repos) {
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Log.i("@@@", "onNext : " + repos.size());
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Toast.makeText(MainActivity.this, "size : " + repos.size(), Toast.LENGTH_SHORT).show();
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}
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});
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```
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`RxJava`+`Retrofit`形式的时候，`Retrofit`把请求封装进`Observable`在请求结束后调用 `onNext()`或在请求失败后调用`onError()`。
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`Proguard`配置

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