如果您使用的是Retrofit框架,可以使用以下方法解决此问题:
在您的Retrofit实例创建代码中添加以下内容:
OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
httpClient.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request original = chain.request();
Request request = original.newBuilder()
.method(original.method(), original.body())
.build();
Response response = chain.proceed(request);
// Add this line to enable raw response body
response = response.newBuilder()
.body(new ProgressResponseBody(response.body(), progressListener))
.build();
return response;
}
}).build();
Retrofit.Builder builder = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create());
Retrofit retrofit = builder.client(httpClient.build()).build();
此代码添加了一个拦截器,该拦截器将原始请求中的主体添加到新请求中,并在响应中启用了原始响应主体。
另外,您还需要添加一个新类ProgressResponseBody,这里提供其代码示例:
import java.io.IOException;
import okhttp3.MediaType;
import okhttp3.ResponseBody;
import okio.BufferedSource;
import okio.ForwardingSource;
import okio.Okio;
import okio.Source;
public class ProgressResponseBody extends ResponseBody {
private final ResponseBody responseBody;
private final ProgressListener progressListener;
private BufferedSource bufferedSource;
public ProgressResponseBody(ResponseBody responseBody, ProgressListener progressListener) {
this.responseBody = responseBody;
this.progressListener = progressListener;
}
@Override
public MediaType contentType() {
return responseBody.contentType();
}
@Override
public long contentLength() {
return responseBody.contentLength();
}
@Override
public BufferedSource source() {
if (bufferedSource == null) {
bufferedSource = Okio.buffer(source(responseBody.source()));
}
return bufferedSource;
}
private Source source(Source source) {
return new ForwardingSource(source) {
long totalBytesRead = 0L;
@Override
public long read(okio.Buffer sink, long byteCount) throws IOException {
long bytesRead = super.read(sink, byteCount);
totalBytesRead += bytesRead != -1 ? bytesRead : 0;
if (progressListener != null) {
progressListener.onProgress(totalBytesRead, responseBody.contentLength(), bytesRead == -1);
}
return bytesRead;
}
};
}
public interface ProgressListener {
void onProgress(long bytesRead, long contentLength, boolean done);
}
}
ProgressResponseBody类实现了带进度的下载,它使用了okhttp3库来处理网络请求。具体来说,它将原始响应主体作为参数传递给它的构造函数,然后使用带进度的源来读取响应主体的数据。在读取期间,将调用进度监听器来更新进度。
请注意,您需要将BASE_URL设置为您的服务器地址。
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