Android网络通讯库之Okhttp3

谁借莪１个温暖的怀抱￠ 2022-09-27 04:59 279阅读 0赞

## Android原生的网络通讯都是用 ##

### HttpURLConnection和HttpClient，由于HttpURLConnection编写步骤繁琐、HttpClient在android6.0系统中被完全移除。进而有出现了多样的网络通讯库，而本人觉得最好用的当属okhttp，使用简单。 ###

### 使用步骤： ###

1.首先引入库

//添加网络通讯库okhttp
    compile 'com.squareup.okhttp3:okhttp:3.4.1'

如果项目中使用频繁的话，可以进行适当的封装

OkhttpUtils.class 封装的工具类

public class OkhttpUtils {
    
        public static String sendHttpRequest(String address) {
            String responseData = null;
            try {
            //创建OkhhtpClient对象
                OkHttpClient client = new OkHttpClient();
                //创建请求的地址
                Request request = new Request.Builder()
                        .url(address)//传入请求地址
                        .build();
                 //响应结果
                Response response = client.newCall(request).execute();
                //将响应结果转化成字符串
                responseData = response.body().string();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return responseData;
        }
    }

MainActivity.class

public class MainActivity extends AppCompatActivity { 
    
        private Button bt_get;
        private TextView textView;
    
        private Handler handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                List list = (List) msg.obj;
                switch (msg.what) {
                    case 1:
                        textView.setText(list.get(0).toString());
                        break;
                }
            }
        };
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            ActionBar actionBar = getSupportActionBar();
            actionBar.setTitle("网络通讯库之OKhttp");
            bt_get = (Button) findViewById(R.id.bt_get);
            textView = (TextView) findViewById(R.id.tv);
            bt_get.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    final String url = "http://blog.csdn.net/qq_32895969";
                    Toast.makeText(MainActivity.this, "发送请求", Toast.LENGTH_SHORT).show();
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            //将Okhttp封装使用
                            String responesData = OkhttpUtils.sendHttpRequest(url);
                            Message message = handler.obtainMessage();
                            message.what = 1;
                            List list = new ArrayList();
                            list.add(responesData);
                            message.obj = list;
                            handler.sendMessage(message);
                        }
                    }).start();
    
    
                }
            });
        }
    }

activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.okhttplearn.MainActivity">
    
        <Button android:id="@+id/bt_get" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="GET请求" />
    
    
        <ScrollView android:layout_width="match_parent" android:layout_height="match_parent" android:scrollbars="none">
    
            <TextView android:id="@+id/tv" android:layout_width="match_parent" android:layout_height="match_parent" />
        </ScrollView>
    </LinearLayout>