OKhttp

public class Myapp extends Application{

    private static OkHttpClient okHttpClient;

    @Override
    public void onCreate() {
        super.onCreate();
        okHttpClient = new OkHttpClient();
        okHttpClient = okHttpClient.newBuilder()
                .connectTimeout(5, TimeUnit.SECONDS)
                .readTimeout(5,TimeUnit.SECONDS)
                .build();

    }
    public static OkHttpClient okHttpClient(){
        return okHttpClient;
    }




 okHttpClient = Myapp.okHttpClient();
        Button btn_get = (Button) findViewById(R.id.btn_get);
        Button btn_post = (Button) findViewById(R.id.btn_post);
        btn_get.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Request request=new Request.Builder()
                        .url("http://www.baidu.com")
                        .build();
                okHttpClient.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(MainActivity.this, "get失败", Toast.LENGTH_SHORT).show();
                            }
                        });

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        if (response.isSuccessful()){
                            String json = response.body().string();
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(MainActivity.this, "get成功", Toast.LENGTH_SHORT).show();
                                }
                            });
                        }
                    }
                });
            }
        });
        btn_post.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                FormBody formBody=new FormBody.Builder()
                        .add("type", "yuantong")
                        .add("postid", "11111111111")
                        .build();
                Request request=new Request.Builder()
                        .url("http://www.kuaidi100.com/query")
                        .post(formBody)
                        .build();
                okHttpClient.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(MainActivity.this, "post失败", Toast.LENGTH_SHORT).show();
                            }
                        });

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        if (response.isSuccessful()){
                            String json = response.body().string();
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(MainActivity.this, "post成功", Toast.LENGTH_SHORT).show();
                                }
                            });
                        }


                    }
                });

            }
        });

    }


}