襄阳做网站价格,wordpress 主题吧,奉化市建设局网站,三门峡市建设局网站okhttp_utils的使用以及与服务端springboot交互中遇到的问题1_okhttp_utils在Android studio中的引入方法2_okhttputils的使用举例3_get和post的简单使用3_图片的上传3.1_单张图片的上传3.1.1_获取安卓本地图片问题3.1.2_okhttputils上传图片代码3.1.3_服务端接收图片3.2_单张图…
okhttp_utils的使用以及与服务端springboot交互中遇到的问题1_okhttp_utils在Android studio中的引入方法2_okhttputils的使用举例3_get和post的简单使用3_图片的上传3.1_单张图片的上传3.1.1_获取安卓本地图片问题3.1.2_okhttputils上传图片代码3.1.3_服务端接收图片3.2_单张图片带参数上传4_图片的下载1_okhttp_utils在Android studio中的引入方法
1.在app目录下的build.gradle中添加 // 添加OKHttp支持implementation(com.squareup.okhttp3:okhttp:4.3.1)implementation com.zhy:okhttputils:2.6.22.创建新activity项目“MyApplication”
package com.example.myapplication;import android.app.Application;
import com.zhy.http.okhttp.OkHttpUtils;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;public class MyApplication extends Application
{Overridepublic void onCreate(){super.onCreate();OkHttpClient okHttpClient new OkHttpClient.Builder()
// .addInterceptor(new LoggerInterceptor(TAG)).connectTimeout(10000L, TimeUnit.MILLISECONDS).readTimeout(10000L, TimeUnit.MILLISECONDS)//其他配置.build();OkHttpUtils.initClient(okHttpClient);}
}3.callBack函数可自己定义用来获取请求后服务端返回的数据
public class MyStringCallback extends StringCallback{Overridepublic void onBefore(Request request, int id){setTitle(loading...);}Overridepublic void onAfter(int id){setTitle(Sample-okHttp);}Overridepublic void onError(Call call, Exception e, int id){e.printStackTrace();Log.i(onError:,e.getMessage());}Overridepublic void onResponse(String response, int id){Log.e(TAG, onResponsecomplete);Log.i(onResponse:,response);switch (id){case 100:Toast.makeText(MainActivity.this, http, Toast.LENGTH_SHORT).show();break;case 101:Toast.makeText(MainActivity.this, https, Toast.LENGTH_SHORT).show();break;}}}2_okhttputils的使用举例
下载实例代码sampleOkhttp
3_get和post的简单使用
主要是路径url参数问题对于post方法无需写?account…password… /*get方法登录*/public void loginGet(final String account, final String password){String url http://10.200.231.191:8081/UserServer/loginByAccount?accountaccountpasswordpassword;OkHttpUtils.get().url(url).build().execute(new StringCallback(){Overridepublic void onError(Call call, Exception e, int id) {}Overridepublic void onResponse(String response, int id) {Log.i(tag,response);}});}/*post方法登录*/public void loginPost(final String account, final String password){String url http://10.200.231.191:8081/UserServer/loginByAccount;OkHttpUtils.post().url(url).addParams(account, account).addParams(password, password).build().execute(new StringCallback(){Overridepublic void onError(Call call, Exception e, int id) {}Overridepublic void onResponse(String response, int id) {Log.i(tag,response);}});}3_图片的上传
3.1_单张图片的上传
3.1.1_获取安卓本地图片问题
获取手机本地文件和电脑操作略有不同由于每部手机路径都可能不一样所以先使用函数getFilesDir()/getCacheDir()/getExternalFilesDir()/getExternalCacheDir()/StorageDirectory()获取路径然后进行文件操作
com.example.fang.test E/getFilesDir(): /data/user/0/com.example.fang.test/files/aa
com.example.fang.test E/getCacheDir(): /data/user/0/com.example.fang.test/cache/aa
com.example.fang.test E/getExternalFilesDir(): /storage/emulated/0/Android/data/com.example.fang.test/files/aa
com.example.fang.test E/getExternalCacheDir(): /storage/emulated/0/Android/data/com.example.fang.test/cache/aa
com.example.fang.test E/StorageDirectory(): /storage/emulated/0/aa
获取文件操作转载
示例
Log.i(tag,Environment.getExternalStorageDirectory().toString());File file new File(Environment.getExternalStorageDirectory()/Pictures, dabai.jpg);//读取getExternalStorageDirectory()路径下Pictures文件夹下的图片if (!file.exists()){Toast.makeText(MainActivity.this, 文件不存在请修改文件路径, Toast.LENGTH_SHORT).show();return;}Log.i(tag,Environment.getExternalStorageDirectory().toString());输出结果 3.1.2_okhttputils上传图片代码
public void convertPicture(File file) {String url http://10.200.231.191:8081 /UserServer/getPicture;MapString, String headers new HashMap();OkHttpUtils.post()//.url(url)//.addFile(pictureFile,xixi.jpg, file)//可以写多条语句上传多张图片.build()//.execute(new MyStringCallback());}url是服务端路径 addFile(“pictureFile”,“xixi.jpg”, file)中的pictureFile是服务端的value名
3.1.3_服务端接收图片
服务端接收图片并不是File类型的若写成File会报错具体原因见MultipartFile与File详解与相互转换
服务端代码 Controller
/*获取图片*/RequestMapping(value getPicture,method RequestMethod.POST)public void getPicture(RequestParam(value pictureFile) MultipartFile multipartFile){System.out.println(收到);FileOperation.multipartfileToFile(multipartFile);return ;}FileOperation:
public class FileOperation {static String multipartfileToFilePath C:\\Users\\Administrator\\Desktop\\wode\\最近有用;
/*将客户端传来的MultipartFile类型的图片转换为File并存储到路径multipartfileToFilePath*/public static void multipartfileToFile(MultipartFile multipartFile){try{File file new File(multipartfileToFilePath,demo.jpg);multipartFile.transferTo(file);// 读取文件第一行BufferedReader bufferedReader new BufferedReader(new FileReader(file));System.out.println(bufferedReader.readLine());// 输出绝对路径System.out.println(file.getAbsolutePath());bufferedReader.close();}catch (Exception e){System.out.println(FileOperationServer:e.toString());}}
}3.2_单张图片带参数上传
客户端
/*带参数上传一张图片*/public void convertPictureAndParam(int userId,float longitude,float latitude,String text,File file) {String url http://10.200.231.191:8081 /PointServer/savePoint;MapString, String headers new HashMap();OkHttpUtils.post()//.url(url)//.addParams(userId,Integer.toString(userId)).addParams(longitude,Float.toString(longitude)).addParams(latitude,Float.toString(latitude)).addParams(text,text).addFile(pictureFile,xixi.jpg, file).build()//.execute(new StringCallback()//返回响应{Overridepublic void onError(Call call, Exception e, int id) {}Overridepublic void onResponse(String response, int id) {Log.i(tag,response);}});}服务端
RestController
RequestMapping(PointServer)
public class PointController {RequestMapping(value savePoint,method RequestMethod.POST)public int savePoint(RequestParam(value userId) int userId,RequestParam(value longitude) float longitude,RequestParam(value latitude) float latitude,RequestParam(value text) String text,RequestParam(value pictureFile)MultipartFile multipartFile){String pictureName UUID.randomUUID().toString().jpg;//通过UUID类表示通用唯一标识符的类获得唯一值UUID表示一个128位的值FileOperation.multipartfileToFile(multipartFile,pictureName);return new PointServer().savePoint(userId,longitude,latitude,text,pictureName);}
}其中FileOperation.multipartfileToFile(multipartFile,pictureName);用于存储图片
4_图片的下载
客户端
/*下载图片*/public void getPicture(){String url http://10.200.231.191:8081 /PointServer/image;OkHttpUtils.get().url(url).build().execute(new BitmapCallback()//服务器返回响应{Overridepublic void onError(Call call, Exception e, int id) {}Overridepublic void onResponse(Bitmap response, int id) {Log.i(picture,response.getClass().toString());mImageView.setImageBitmap(response);//显示在控件mImageView上}});}服务端 GetMapping(value image,produces MediaType.IMAGE_JPEG_VALUE)ResponseBodypublic byte[] test() throws Exception {File file new File(FileOperation.readPicturePath,4d5c3e33-67c2-4e66-9939-e97a3f49c36f.jpg);FileInputStream inputStream new FileInputStream(file);byte[] bytes new byte[inputStream.available()];inputStream.read(bytes, 0, inputStream.available());return bytes;}
