Android实战——okhttp3的使用和封装
okhttp3的基本使用
1、Get请求
2、Post请求
3、文件上传
4、文件下载
okhttp3的导入
compile 'com.squareup.okio:okio:1.13.0' compile 'com.squareup.okhttp3:okhttp:3.9.0'
okhttp3工具类的简单封装的演示
public class HttpUtils {
private static volatile OkHttpClient okHttpClient;
private static volatile Request request;
public static OkHttpClient okhttp() {
okHttpClient = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.writeTimeout(10, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.addNetworkInterceptor(new TokenHeaderInterceptor())
.build();
return okHttpClient;
}
/**
* @param baseUrl //请求的URL
* @param formBody //请求参数，这里是post form表单请求
* @return
*/
public static Request request (String baseUrl, FormBody formBody ){
//请求的url
request = new Request.Builder()
.url(baseUrl)//请求的url
.post(formBody)
.build();
return request;
}
/**
* 拦截器
*/
public static class TokenHeaderInterceptor implements Interceptor {
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
// get token
// String token = AppService.getToken();
Request originalRequest = chain.request();
// get new request, add request header
Request updateRequest = originalRequest.newBuilder()
//请求头
// .header("token", token)
.build();
return chain.proceed(updateRequest);
}
}
}
上传文件演示 获取进度的工具类
public class UploadFileRequestBody extends RequestBody {
private RequestBody mRequestBody;
private ProgressListener mProgressListener;
private BufferedSink bufferedSink;
private String fileName ;
public UploadFileRequestBody(File file, ProgressListener progressListener) {
this.mRequestBody = RequestBody.create(MediaType.parse("multipart/form-data"), file);
this.mProgressListener = progressListener;
this.fileName = file.getName();
}
public UploadFileRequestBody(RequestBody requestBody, ProgressListener progressListener) {
this.mRequestBody = requestBody;
this.mProgressListener = progressListener;
}
//返回了requestBody的类型，想什么form-data/MP3/MP4/png等等等格式
@Override
public MediaType contentType() {
return mRequestBody.contentType();
}
//返回了本RequestBody的长度，也就是上传的totalLength
@Override
public long contentLength() throws IOException {
return mRequestBody.contentLength();
}
@Override
public void writeTo(BufferedSink sink) throws IOException {
if (bufferedSink == null) {
//包装
bufferedSink = Okio.buffer(sink(sink));
}
//写入
mRequestBody.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();
}
private Sink sink(Sink sink) {
return new ForwardingSink(sink) {
//当前写入字节数
long bytesWritten = 0L;
//总字节长度，避免多次调用contentLength()方法
long contentLength = 0L;
@Override
public void write(Buffer source, long byteCount) throws IOException {
super.write(source, byteCount);
if (contentLength == 0) {
//获得contentLength的值，后续不再调用
contentLength = contentLength();
}
//增加当前写入的字节数
bytesWritten += byteCount;
//回调上传接口
mProgressListener.onProgress(bytesWritten, contentLength, bytesWritten == contentLength);
}
};
}
public String getFileName() {
return fileName;
}
}
// file 上传的文件
UploadFileRequestBody fileRequestBody = new UploadFileRequestBody(file, new ProgressListener() {
@Override
public void onProgress(long hasWrittenLen, long totalLen, boolean hasFinish) {
//计算进度
long l = hasWrittenLen * 100 / totalLen;
Apollo.emit(EventConstant.SHANGCHUAN, l);
Log.d("onProgress: ", l + "");
}
});
接下来请求接口 fileRequestBody 参数传进去就可以了
下载文件演示
/**
* 文件下载工具类（单例模式）
*/
public class DownloadUtil {
private static DownloadUtil downloadUtil;
private final OkHttpClient okHttpClient;
private File file;
String fileName = "";
String fileSize = "";
public static DownloadUtil get() {
if (downloadUtil == null) {
downloadUtil = new DownloadUtil();
}
return downloadUtil;
}
private DownloadUtil() {
okHttpClient = ArtUtils.obtainAppComponentFromContext(MainApplication.getInstance()).okHttpClient();
}
/**
* @param url 下载连接
* @param destFileDir 下载的文件储存目录
* @param destFileName 下载文件名称
* @param listener 下载监听
*/
public void download(final String url, final String destFileDir, final String destFileName, final OnDownloadListener listener) {
Request request = new Request.Builder()
.get()
.url(url)
.build();
//异步请求
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
// 下载失败监听回调
listener.onDownloadFailed(e,fileName,fileSize);
}
@Override
public void onResponse(Call call, Response response) throws IOException {
InputStream is = null;
byte[] buf = new byte[2048];
int len = 0;
FileOutputStream fos = null;
//储存下载文件的目录
File dir = new File(destFileDir);
if (!dir.exists()) {
dir.mkdirs();
}
try {
is = response.body().byteStream();
Headers headers = response.headers();
headers.size();
String name = headers.get("Content-Disposition");
Log.d("onResponse: ", headers.get("fileSize") + "");
Log.d("onResponse: ", headers.get("fileName") + "");
fileSize = headers.get("fileSize");
fileName = headers.get("fileName");
long total = response.body().contentLength();
file = new File(dir, fileName);
listener.onDownloadFile(fileName,fileSize);
fos = new FileOutputStream(file);
long sum = 0;
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
sum += len;
int progress = (int) (sum * 1.0f / total * 100);
//下载中更新进度条
listener.onDownloading(progress, fileName, fileSize);
}
fos.flush();
//下载完成
listener.onDownloadSuccess(file, fileName, fileSize);
} catch (Exception e) {
listener.onDownloadFailed(e, fileName, fileSize);
} finally {
try {
if (is != null) {
is.close();
}
if (fos != null) {
fos.close();
}
} catch (IOException e) {
}
}
}
});
}
public interface OnDownloadListener {
/**
* 下载成功之后的文件
*/
void onDownloadSuccess(File file, String name, String size);
/**
* 下载进度
*/
void onDownloading(int progress, String name, String size);
/**
* 下载异常信息
*/
void onDownloadFailed(Exception e, String fileName, String size);
/**
* 文件信息
* @param fileName
* @param size
*/
void onDownloadFile( String fileName, String size);
}
}
/** * @param url 下载连接 * @param destFileDir 下载的文件储存目录 * @param destFileName 下载文件名称 * @param listener 下载监听 */
DownloadUtil.get().download(“url ”, “url ”, “destFileName ”,
new DownloadUtil.OnDownloadListener() {
@Override
public void onDownloadSuccess(File file, String fileName, String size) {
Log.d("onDownloadSuccess: ",fileName1+"");
//下载成功
}
@Override
public void onDownloading(int progress, String fileName, String size) {
Log.d("onDownloading: ", progress + "" + fileName + "" + size);
//正在下载 进度
}
@Override
public void onDownloadFailed(Exception e, String fileName, String size) {
Log.d("onDownloading: ", e.getMessage() + "%。。。。");
//下载失败
}
@Override
public void onDownloadFile(String fileName, String size) {
//文件信息
}
});