RxJava+Retrofit+OkHttp实现文件上传
背景
在实际运用中上传是一个必不可少的功能，所以我们在封装二的基础上加入上传的功能，同时需要附带上传进度！
效果
实现
1.定义service接口
注意：Multipart是指定大文件上传过程中的标示，一般上传图片的过程中我们需要附带信息，所以我们需要用到@part指定传递的数值，MultipartBody.Part是指定传递的文件；
/*上传文件*/
@Multipart
@POST("AppYuFaKu/uploadHeadImg")
Observable<BaseResultEntity<UploadResulte uploadImage(@Part("uid") RequestBody uid, @Part("auth_key") RequestBody auth_key,@Part MultipartBody.Part file);2.加入进度条
retrofit是基于okhttp的处理，所以我们可以自定义RequestBody，复写writeTo(BufferedSink sink)方法，得到传递的进度数据
public class ProgressRequestBody extends RequestBody {
//实际的待包装请求体
private final RequestBody requestBody;
//进度回调接口
private final UploadProgressListener progressListener;
//包装完成的BufferedSink
private BufferedSink bufferedSink;
public ProgressRequestBody(RequestBody requestBody, UploadProgressListener progressListener) {
this.requestBody = requestBody;
this.progressListener = progressListener;
}
/**
* 重写调用实际的响应体的contentType
* @return MediaType
*/
@Override
public MediaType contentType() {
return requestBody.contentType();
}
/**
* 重写调用实际的响应体的contentLength
* @return contentLength
* @throws IOException 异常
*/
@Override
public long contentLength() throws IOException {
return requestBody.contentLength();
}
/**
* 重写进行写入
* @param sink BufferedSink
* @throws IOException 异常
*/
@Override
public void writeTo(BufferedSink sink) throws IOException {
if (null == bufferedSink) {
bufferedSink = Okio.buffer(sink(sink));
}
requestBody.writeTo(bufferedSink);
//必须调用flush，否则最后一部分数据可能不会被写入
bufferedSink.flush();
}
/**
* 写入，回调进度接口
* @param sink Sink
* @return Sink
*/
private Sink sink(Sink sink) {
return new ForwardingSink(sink) {
//当前写入字节数
long writtenBytesCount = 0L;
//总字节长度，避免多次调用contentLength()方法
long totalBytesCount = 0L;
@Override
public void write(Buffer source, long byteCount) throws IOException {
super.write(source, byteCount);
//增加当前写入的字节数
writtenBytesCount += byteCount;
//获得contentLength的值，后续不再调用
if (totalBytesCount == 0) {
totalBytesCount = contentLength();
}
Observable.just(writtenBytesCount).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1<Long () {
@Override
public void call(Long aLong) {
progressListener.onProgress(writtenBytesCount, totalBytesCount);
}
});
}
};
}
}3自定义接口，回调progress进度
public interface UploadProgressListener {
/**
* 上传进度
* @param currentBytesCount
* @param totalBytesCount
*/
void onProgress(long currentBytesCount, long totalBytesCount);
}4创建RequestBody对象，加入进度
File file=new File("/storage/emulated/0/Download/11.jpg");
RequestBody requestBody=RequestBody.create(MediaType.parse("image/jpeg"),file);
MultipartBody.Part part= MultipartBody.Part.createFormData("file_name", file.getName(), new ProgressRequestBody(requestBody,
new UploadProgressListener() {
@Override
public void onProgress(long currentBytesCount, long totalBytesCount) {
tvMsg.setText("提示:上传中");
progressBar.setMax((int) totalBytesCount);
progressBar.setProgress((int) currentBytesCount);
}
}));5.传递附带信息
和封装二中post请求的方式一样，我们需要继承baseentity，复写里面的方法，然后设置需要传递的参数，因为是测试接口，所以我的参数直接写死在entity里面,part文件动态指定
/**
* 上传请求api
* Created by WZG on 2016/10/20.
*/
public class UplaodApi extends BaseEntity {
/*需要上传的文件*/
private MultipartBody.Part part;
public UplaodApi(HttpOnNextListener listener, RxAppCompatActivity rxAppCompatActivity) {
super(listener, rxAppCompatActivity);
setShowProgress(true);
}
public MultipartBody.Part getPart() {
return part;
}
public void setPart(MultipartBody.Part part) {
this.part = part;
}
@Override
public Observable getObservable(HttpService methods) {
RequestBody uid= RequestBody.create(MediaType.parse("text/plain"), "4811420");
RequestBody key = RequestBody.create(MediaType.parse("text/plain"), "21f8d9bcc50c6ac1ae1020ce12f5f5a7");
return methods.uploadImage(uid,key,getPart());
}
}6.post请求处理
请求和封装二中的请求一样，通过传递一个指定的HttpOnNextListener 对象来回调来监听结果信息，一一对应
private void uploadeDo(){
File file=new File("/storage/emulated/0/Download/11.jpg");
RequestBody requestBody=RequestBody.create(MediaType.parse("image/jpeg"),file);
MultipartBody.Part part= MultipartBody.Part.createFormData("file_name", file.getName(), new ProgressRequestBody(requestBody,
new UploadProgressListener() {
@Override
public void onProgress(long currentBytesCount, long totalBytesCount) {
tvMsg.setText("提示:上传中");
progressBar.setMax((int) totalBytesCount);
progressBar.setProgress((int) currentBytesCount);
}
}));
UplaodApi uplaodApi = new UplaodApi(httpOnNextListener,this);
uplaodApi.setPart(part);
HttpManager manager = HttpManager.getInstance();
manager.doHttpDeal(uplaodApi);
}
/**
* 上传回调
*/
HttpOnNextListener httpOnNextListener=new HttpOnNextListener<UploadResulte () {
@Override
public void onNext(UploadResulte o) {
tvMsg.setText("成功");
Glide.with(MainActivity.this).load(o.getHeadImgUrl()).skipMemoryCache(true).into(img);
}
@Override
public void onError(Throwable e) {
super.onError(e);
tvMsg.setText("失败："+e.toString());
}
};以上就是本文的全部内容，希望对大家的学习有所帮助。
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原始发表：2020-09-11
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