基于Okhttp3的简单封装,Bean,String数据返回

本文介绍了一个基于 OkHttp 3.4.2 的简易封装方案,包括必要的 Jar 包下载链接及使用示例。该方案提供同步和异步请求方式,并支持 GET 和 POST 方法。

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1.导入Jar包

okhttp-3.4.2.jar

okio-1.11.0.jar

gson-2.8.0.jar(建议使用Gson实例化Bean)

JAR包下载地址:http://download.youkuaiyun.com/detail/tongzhenggang/9688430


2.使用方法,随便写个例子,大家自行调用,封装方法类

Handler mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                if (msg.what == 0) {// 请求成功
                    ToastUtil.show(mContext,msg.obj.toString());

                } else {
                    ToastUtil.show(mContext, msg.obj.toString());
                }

            }
        };
        OkHttp3ClientManager.getInstance().getStringExecute(DownloadUrl,null,mHandler);

3.OkHttp3ClientManager.java

package tool;

import android.os.Handler;
import android.os.Message;
import android.util.Log;

import com.google.gson.Gson;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * OkHttpClient封装,基于Okhttp-3.4.2,Okio-1.11.0 封装
 *
 * Created by tongzhenggang@126.com
 */
public class OkHttp3ClientManager {

    private String TAG = this.getClass().getName();
    private static OkHttp3ClientManager mInstance;
    private OkHttpClient mOkHttpClient;

    private OkHttp3ClientManager() {
        mOkHttpClient = new OkHttpClient.Builder().readTimeout(30, TimeUnit.SECONDS) // 读取超时
                .connectTimeout(10, TimeUnit.SECONDS) // 连接超时
                .writeTimeout(60, TimeUnit.SECONDS) // 写入超时
                .build();
    }

    public static OkHttp3ClientManager getInstance() {
        if (mInstance == null) {
            synchronized (OkHttp3ClientManager.class) {
                if (mInstance == null) {
                    mInstance = new OkHttp3ClientManager();
                }
            }
        }
        return mInstance;
    }

    /**
     * post请求参数
     *
     * @param BodyParams
     * @return
     */
    private RequestBody SetRequestBody(Map<String, Object> BodyParams) {
        RequestBody body = null;
        // 创建请求的参数body
        FormBody.Builder builder = new FormBody.Builder();

        // 遍历key
        if (null != BodyParams) {
            for (Map.Entry<String, Object> entry : BodyParams.entrySet()) {

                System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());

                builder.add(entry.getKey(), entry.getValue().toString());

            }
        }

        body = builder.build();
        return body;
    }


    /**
     * get方法连接拼加参数
     *
     * @param mapParams
     * @return
     */
    private String setUrlParams(Map<String, Object> mapParams) {
        String strParams = "";
        if (mapParams != null) {
            Iterator<String> iterator = mapParams.keySet().iterator();
            String key = "";
            while (iterator.hasNext()) {
                key = iterator.next().toString();
                strParams += "&" + key + "=" + mapParams.get(key);
            }
        }

        return strParams;
    }

    /**
     * POST方法获取实体bean
     *
     * @param reqUrl
     * @param map
     * @param mHandler
     * @param rspClass
     */
    public void postBeanExecute(String reqUrl, Map<String, Object> map, final Handler mHandler,
                                final Class<?> rspClass) {
        RequestBody body = SetRequestBody(map);
        Request request = new Request.Builder().url(reqUrl).post(body).build();
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {

            @Override
            public void onResponse(Call arg0, Response arg1) throws IOException {
                String Result = arg1.body().string();
//          Result = PUB.decodeBase64(Result);
                Log.d(TAG, "[postBeanExecute]Call===" + arg1.code() + "Response===" + Result);

                Message mess = mHandler.obtainMessage();
                if (arg1.code() == 200) {
                    try {
                        // 转换返回结果信息给BEAN
                        mess.obj = new Gson().fromJson(Result, rspClass);
                    } catch (Exception e) {
                        mess.what = 404;
                        mess.obj = "HTTP数据异常-0002";
                    }
                } else {
                    mess.what = arg1.code();
                    mess.obj = "HTTP状态异常-" + arg1.code();
                }
                mHandler.sendMessage(mess);
            }

            @Override
            public void onFailure(Call arg0, IOException arg1) {
                Log.d(TAG, "[onFailure]Call===" + arg0 + "IOException===" + arg1.toString());

                Message mess = mHandler.obtainMessage();
                mess.what = 404;
                mess.obj = "HTTP通讯错误-0001";
                mHandler.sendMessage(mess);
            }
        });
    }

    /**
     * Get方法获取实体bean
     *
     * @param reqUrl
     * @param map
     * @param mHandler
     * @param rspClass
     */
    public void getBeanExecute(String reqUrl, Map<String, Object> map, final Handler mHandler,
                               final Class<?> rspClass) {
        String UrlParams = setUrlParams(map);
        String URL = reqUrl + "?" + UrlParams;
        Log.d(TAG, "[getBeanExecute]URL===" + URL);

        Request request = new Request.Builder().url(URL).build();
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {

            @Override
            public void onResponse(Call arg0, Response arg1) throws IOException {
                String Result = arg1.body().string();
//          Result = PUB.decodeBase64(Result);
                Log.d(TAG, "[onResponse]Call===" + arg1.code() + "Response===" + Result);

                Message mess = mHandler.obtainMessage();
                if (arg1.code() == 200) {
                    try {
                        // 转换返回结果信息给BEAN
                        mess.obj = new Gson().fromJson(Result, rspClass);
                    } catch (Exception e) {
                        mess.what = 404;
                        mess.obj = "HTTP数据异常-0002";
                    }
                } else {
                    mess.what = arg1.code();
                    mess.obj = "HTTP状态异常-" + arg1.code();
                }
                mHandler.sendMessage(mess);
            }

            @Override
            public void onFailure(Call arg0, IOException arg1) {
                Log.d(TAG, "[onFailure]Call===" + arg0 + "IOException===" + arg1.toString());

                Message mess = mHandler.obtainMessage();
                mess.what = 404;
                mess.obj = "HTTP通讯错误-0001";
                mHandler.sendMessage(mess);
            }
        });
    }


    /**
     * Post 获取String数据
     *
     * @param reqUrl
     * @param mHandler
     */
    public void postStringExecute(String reqUrl, Map<String, Object> map, final Handler mHandler) {
        RequestBody body = SetRequestBody(map);
        Request request = new Request.Builder().url(reqUrl).post(body).build();
        Log.d(TAG, "[postStringExecute]URL===" + reqUrl);

        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {

            @Override
            public void onResponse(Call arg0, Response arg1) throws IOException {
                String Result = arg1.body().string();
//          Result = PUB.decodeBase64(Result);
                Log.d(TAG, "[onResponse]Call===" + arg1.code() + "Response===" + Result);

                Message mess = mHandler.obtainMessage();
                if (arg1.code() == 200) {
                    try {
                        // 转换返回结果信息给BEAN
                        mess.obj = Result;
                    } catch (Exception e) {
                        mess.what = 404;
                        mess.obj = "HTTP数据异常-0002";
                    }
                } else {
                    mess.what = arg1.code();
                    mess.obj = "HTTP状态异常-" + arg1.code();
                }
                mHandler.sendMessage(mess);
            }

            @Override
            public void onFailure(Call arg0, IOException arg1) {
                Log.d(TAG, "[onFailure]Call===" + arg0 + "IOException===" + arg1.toString());

                Message mess = mHandler.obtainMessage();
                mess.what = 404;
                mess.obj = "HTTP通讯错误-0001";
                mHandler.sendMessage(mess);
            }
        });
    }


    /**
     * Get 获取String数据
     *
     * @param reqUrl
     * @param mHandler
     */
    public void getStringExecute(String reqUrl, Map<String, Object> map, final Handler mHandler) {
        String UrlParams = setUrlParams(map);
        String URL = reqUrl + "?" + UrlParams;
        Log.d(TAG, "[getBeanExecute]URL===" + URL);

        Request request = new Request.Builder().url(URL).build();
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {

            @Override
            public void onResponse(Call arg0, Response arg1) throws IOException {
                String Result = arg1.body().string();
//          Result = PUB.decodeBase64(Result);
                Log.d(TAG, "[onResponse]Call===" + arg1.code() + "Response===" + Result);

                Message mess = mHandler.obtainMessage();
                if (arg1.code() == 200) {
                    try {
                        // 转换返回结果信息给BEAN
                        mess.obj = Result;
                    } catch (Exception e) {
                        mess.what = 404;
                        mess.obj = "HTTP数据异常-0002";
                    }
                } else {
                    mess.what = arg1.code();
                    mess.obj = "HTTP状态异常-" + arg1.code();
                }
                mHandler.sendMessage(mess);
            }

            @Override
            public void onFailure(Call arg0, IOException arg1) {
                Log.d(TAG, "[onFailure]Call===" + arg0 + "IOException===" + arg1.toString());

                Message mess = mHandler.obtainMessage();
                mess.what = 404;
                mess.obj = "HTTP通讯错误-0001";
                mHandler.sendMessage(mess);
            }
        });
    }
}

如果你使用 OkHttp 来获取图片,一种常见的做法是将图片转换为字节数组,然后将字节数组作为响应体返回,最后在客户端将字节数组转换为图片。下面是一个示例代码: ```java OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url("http://example.com/image.png") .build(); Response response = client.newCall(request).execute(); if (!response.isSuccessful()) { throw new IOException("Unexpected code " + response); } byte[] bytes = response.body().bytes(); // 将字节数组转换为 Bitmap Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length); // 在 ImageView 中显示图片 imageView.setImageBitmap(bitmap); ``` 如果你想要将图片作为响应体的一部分,可以定义一个 JavaBean 类来表示图片: ```java public class ImageBean { private String name; private byte[] data; public ImageBean(String name, byte[] data) { this.name = name; this.data = data; } public String getName() { return name; } public byte[] getData() { return data; } } ``` 然后在服务端将图片转换为字节数组后,将字节数组和图片名称封装到 ImageBean 对象中,最后以 JSON 格式返回给客户端。客户端可以使用 Gson 库将 JSON 字符串转换为 ImageBean 对象,例如: ```java Gson gson = new Gson(); ImageBean imageBean = gson.fromJson(jsonString, ImageBean.class); byte[] data = imageBean.getData(); // 将字节数组转换为 Bitmap Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); // 在 ImageView 中显示图片 imageView.setImageBitmap(bitmap); ```
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