1:配置网络权限

2：导入依赖    

 compile 'com.squareup.okhttp3:okhttp:3.8.1'

3：开始写代码

（1）.get请求（同步）

OkHttpClient ok = new OkHttpClient();

Request request = new Request.Builder().url( mUrl ).build();

Response response = ok.newCall( request ).execute();

String string = response.body().string();

（2）.post请求：（同步，带判断条件）

OkHttpClient ok = new OkHttpClient();

FormBody body = new FormBody.Builder().add( "name","lxx" ).add( "password","123" ).build();

Request request = new Request.Builder().url( mUrl ).post( body ).build();

Response response = ok.newCall( request ).execute();

String s = response.body().string();

（3）.get请求（异步）

OkHttpClient ok = new OkHttpClient();

Request request = new Request.Builder().url( mUrl ).build();

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

//访问失败时做的操作：

@Override

public void onFailure(Call call, IOException e) {

}

//访问成功时做的操作：

@Override

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

Log.e( "这是异步get请求",response.body().string() );

}

} );

（4）.post（异步）

OkHttpClient ok = new OkHttpClient();

FormBody body = new FormBody.Builder().add( "name", "lxx" ).add( "password", "123" ).build();

//        Request request = new Request.Builder().url( mUrl ).post( body ).build();

//        ok.newCall( request ).enqueue( new Callback() {

//            @Override

//            public void onFailure(Call call, IOException e) {

//

//            }

//

//            @Override

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

//                Log.e( "这是异步post请求",response.body().string() );

//            }

//        } );