简单封装OkHttp

1.首先导入依赖

 implementation'com.squareup.okhttp3:okhttp:3.10.0'

2.新建一个class

//封装OkHttpUtils 
public class OkHttpUtils {

    public OkHttpUtils() {

}

    public OkHttpUtils get(String path) {

        OkHttpClient okHttpClient = new OkHttpClient();

        Request request = new Request.Builder()

                .get()

                .url(path)

                .build();

        okHttpClient.newCall(request).enqueue(new Callback() {

            @Override

            public void onFailure(Call call, IOException e) {

}

            @Override

            public void onResponse(Call call, Response response) throws IOException {

                getData.Data(response.body().string());

            }

        });

        return this;

    }

    //写一个接口

    public interface GetData {

        void Data(String s);

    }

    private GetData getData;

    public void getDataLisener(GetData getData) {

        this.getData = getData;

    }

}

3.在Activity中调用

public class MainActivity extends AppCompatActivity {

    private ListView listView;

    private String path = "http://www.xieast.com/api/news/news.php?page=1";

    private ArrayList<User.Data> list;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

       //找控件

        listView = (ListView) findViewById(R.id.listview);

        SearchView searchView = (SearchView) findViewById(R.id.searchView);

        searchView.setQueryHint("请输入搜索内容");

        searchView.setIconifiedByDefault(false);

        OkHttpUtils okHttpUtils = new OkHttpUtils();

        okHttpUtils.get(path).getDataLisener(new OkHttpUtils.GetData() {

            @Override

            public void Data(String s) {

                list = new ArrayList<>();

                Gson gson = new Gson();

                User user = gson.fromJson(s, User.class);

                ArrayList<User.Data> data = user.getData();

                list.addAll(data);

                Message message = Message.obtain();

                message.obj = list;

                handler.sendMessage(message);

            }

        });

    }

    Handler handler = new Handler(){

        @Override

        public void handleMessage(Message msg) {

            super.handleMessage(msg);

            MyAdapter myAdapter = new MyAdapter(MainActivity.this,list);

            listView.setAdapter(myAdapter);

        }

    };

}