概要

単純な例

0.OkHttp導入

import okhttp3.*;

1.OkHttpClientの作成

OkHttpClient okHttpClient = new OkHttpClient().newBuilder()
        .readTimeout(10, TimeUnit.SECONDS)
        .connectTimeout(9, TimeUnit.SECONDS)
        .build();

2.Requestの作成

final Request request = new Request.Builder()
        .client(okHttpClient)
        .url("https://www.baidu.com/")
        .build();

3.Callの作成

Call call = okHttpClient.newCall(request);

4.実行Call

非同期実行

call.enqueue(new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        String str = response.body().string();
        byte[] bytes = response.body().bytes();
        //  ， Android HTTP API， 。
        ByteArrayInputStream inputStream = (ByteArrayInputStream) response.body().byteStream();
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                //  UI 
            }
        });
    }
});

同期実行

try {
    Response response = call.execute();
} catch (IOException e) {
    e.printStackTrace();
}

POST例

1.RequestBodyの作成

タイプ1：FormBody

RequestBody body1 = new FormBody.Builder().add("username", "name").build();

タイプ2：MultipartBody

File file = new File(Environment.getExternalStorageDirectory(), "balabala.mp4");
RequestBody body2 = new MultipartBody.Builder()
        .setType(MultipartBody.FORM)
        .addFormDataPart("name1", "value1")
        //  
        .addFormDataPart("name2", "filename1", RequestBody.create(MediaType.parse("image/png"), file))
        .addPart(Headers.of( "Content-Disposition", "form-data; name=\"name3\""),
                RequestBody.create(null, "value2"))
        //  
        .addPart(Headers.of("Content-Disposition", "form-data; name=\"name4\"; filename =\"filename2\""),
                RequestBody.create(MediaType.parse("image/png"), file))
        .build();

2.Requestの作成

Request request = new Request.Builder()
        .url("https://www.baidu.com/")
        .post(/* RequestBody */)
        .build();

注意事項