okHttp的使用

1、首先添加依赖build.gradle文件中添加

plugins {
    id 'com.android.application'
}

android {
    compileSdk 32

    defaultConfig {
        applicationId "com.example.myapplication"
        minSdk 21
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

　　 //这里也需要添加，否则添加依赖时会报错
    packagingOptions{
        exclude 'META-INF/DEPENDENCIES' 
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    implementation 'com.google.firebase:firebase-crashlytics-buildtools:2.5.2'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

    //okhttp 添加依赖
    implementation 'com.squareup.okhttp3:okhttp:4.4.0'
}

2、添加httpulit.java类 这里只写了同步的。异步的可以另外写

public class HttpUtils {

    private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
    private static OkHttpClient client = new OkHttpClient();

    public static Response post(String url, String json) throws IOException {
        RequestBody body = RequestBody.create(JSON, json);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        Response response = client.newCall(request).execute();
        return response;
    }

    public static Response get(String url) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Response response = client.newCall(request).execute();
        return response;
    }
}

3、业务事件里面添加，同步的里面需要另起一个线程

new Thread(){
                    @Override
                    public void run() {
                        Response response = null;
                        try {
                            response = get("https://ip.help.bj.cn/?ip=202.98.0.68");
                            String data = new String(response.body().bytes(),"GB2312");
                            Log.i(TAG, "run: "+data);
                            //parseJsonWith(data);
                        } catch (IOException e) {
                            //e.printStackTrace();
                            Toast.makeText(getApplicationContext(),"网络请求错误",Toast.LENGTH_LONG).show();
                        }
                    }
                }.start();