Muat naik fail Android
Pengenalan kepada bahagian ini
Bahagian ini adalah sama dengan bahagian seterusnya mengenai muat turun fail, sila teruskan dengan berhati-hati...Sekarang pembangunan sebenar melibatkan muat naik fail, anda tidak akan tulis sendiri kod muat naik Secara umumnya, Ia akan menyepadukan perpustakaan rangkaian pihak ketiga untuk memuat naik imej, seperti android-async-http, okhttp, dll. Qiniu juga menyediakan Muat turun dan muat naik API, jika anda suka, anda boleh pergi ke laman web rasmi untuk melihat dokumentasi API yang berkaitan! Jika anda berminat dengan bahagian ini, lihat sahaja!
1 Kaedah utama untuk memuat naik imej yang digunakan dalam projek:
Setelah memikirkannya, saya memutuskan untuk menyiarkan teras memuat naik imej yang digunakan dalam projek syarikat Kaedah pertama, perpustakaan pihak ketiga digunakan di sini: android-async-http.jar, pergi ke github dan muat turun perpustakaan ini~ Kemudian panggil kaedah berikut dan tukar sendiri url
Kaedah teras untuk memuat naik imej adalah seperti berikut:
private void sendImage(Bitmap bm)
{
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 60, stream);
byte[] bytes = stream.toByteArray();
String img = new String(Base64.encodeToString(bytes, Base64.DEFAULT));
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.add("img", img);
client.post("http:xxx/postIcon", params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int i, Header[] headers, byte[] bytes) {
Toast.makeText(MainActivity.this, "Upload Success!", Toast.LENGTH_LONG).show();
}
@Override
public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
Toast.makeText(MainActivity.this, "Upload Fail!", Toast.LENGTH_LONG).show();
}
});
}2. Gunakan HttpConnection untuk memuat naik fail:
Sangat kacau... Pelbagai tetapan, semua jenis masalah... Saya masih mengesyorkan menggunakan kaedah 1. Sudah tentu, anda boleh menonton ia jika anda terlalu bebas, lihat.
Roda ada, jadi jangan buat roda sendiri lagi...
public class SocketHttpRequester
{
/**
* 发送xml数据
* @param path 请求地址
* @param xml xml数据
* @param encoding 编码
* @return
* @throws Exception
*/
public static byte[] postXml(String path, String xml, String encoding) throws Exception{
byte[] data = xml.getBytes(encoding);
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);
conn.setRequestProperty("Content-Length", String.valueOf(data.length));
conn.setConnectTimeout(5 * 1000);
OutputStream outStream = conn.getOutputStream();
outStream.write(data);
outStream.flush();
outStream.close();
if(conn.getResponseCode()==200){
return readStream(conn.getInputStream());
}
return null;
}
/**
* 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:
*
* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，
* 因为它会指向手机模拟器，你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param file 上传文件
*/
public static boolean post(String path, Map params, FormFile[] files) throws Exception
{
//数据分隔线
final String BOUNDARY = "---------------------------7da2137580612";
//数据结束标志"---------------------------7da2137580612--"
final String endline = "--" + BOUNDARY + "--/r/n";
//下面两个for循环都是为了得到数据长度参数，依据表单的类型而定
//首先得到文件类型数据的总长度(包括文件分割线)
int fileDataLength = 0;
for(FormFile uploadFile : files)
{
StringBuilder fileExplain = new StringBuilder();
fileExplain.append("--");
fileExplain.append(BOUNDARY);
fileExplain.append("/r/n");
fileExplain.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");
fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");
fileExplain.append("/r/n");
fileDataLength += fileExplain.length();
if(uploadFile.getInStream()!=null){
fileDataLength += uploadFile.getFile().length();
}else{
fileDataLength += uploadFile.getData().length;
}
}
//再构造文本类型参数的实体数据
StringBuilder textEntity = new StringBuilder();
for (Map.Entry entry : params.entrySet())
{
textEntity.append("--");
textEntity.append(BOUNDARY);
textEntity.append("/r/n");
textEntity.append("Content-Disposition: form-data; name=/""+ entry.getKey() + "/"/r/n/r/n");
textEntity.append(entry.getValue());
textEntity.append("/r/n");
}
//计算传输给服务器的实体数据总长度(文本总长度+数据总长度+分隔符)
int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;
URL url = new URL(path);
//默认端口号其实可以不写
int port = url.getPort()==-1 ? 80 : url.getPort();
//建立一个Socket链接
Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);
//获得一个输出流（从Android流到web）
OutputStream outStream = socket.getOutputStream();
//下面完成HTTP请求头的发送
String requestmethod = "POST "+ url.getPath()+" HTTP/1.1/r/n";
outStream.write(requestmethod.getBytes());
//构建accept
String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*/r/n";
outStream.write(accept.getBytes());
//构建language
String language = "Accept-Language: zh-CN/r/n";
outStream.write(language.getBytes());
//构建contenttype
String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "/r/n";
outStream.write(contenttype.getBytes());
//构建contentlength
String contentlength = "Content-Length: "+ dataLength + "/r/n";
outStream.write(contentlength.getBytes());
//构建alive
String alive = "Connection: Keep-Alive/r/n";
outStream.write(alive.getBytes());
//构建host
String host = "Host: "+ url.getHost() +":"+ port +"/r/n";
outStream.write(host.getBytes());
//写完HTTP请求头后根据HTTP协议再写一个回车换行
outStream.write("/r/n".getBytes());
//把所有文本类型的实体数据发送出来
outStream.write(textEntity.toString().getBytes());
//把所有文件类型的实体数据发送出来
for(FormFile uploadFile : files)
{
StringBuilder fileEntity = new StringBuilder();
fileEntity.append("--");
fileEntity.append(BOUNDARY);
fileEntity.append("/r/n");
fileEntity.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");
fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");
outStream.write(fileEntity.toString().getBytes());
//边读边写
if(uploadFile.getInStream()!=null)
{
byte[] buffer = new byte[1024];
int len = 0;
while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1)
{
outStream.write(buffer, 0, len);
}
uploadFile.getInStream().close();
}
else
{
outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
}
outStream.write("/r/n".getBytes());
}
//下面发送数据结束标志，表示数据已经结束
outStream.write(endline.getBytes());
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败
if(reader.readLine().indexOf("200")==-1)
{
return false;
}
outStream.flush();
outStream.close();
reader.close();
socket.close();
return true;
}
/**
* 提交数据到服务器
* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param file 上传文件
*/
public static boolean post(String path, Map params, FormFile file) throws Exception
{
return post(path, params, new FormFile[]{file});
}
/**
* 提交数据到服务器
* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param encode 编码
*/
public static byte[] postFromHttpClient(String path, Map params, String encode) throws Exception
{
//用于存放请求参数
List formparams = new ArrayList();
for(Map.Entry entry : params.entrySet())
{
formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode);
HttpPost httppost = new HttpPost(path);
httppost.setEntity(entity);
//看作是浏览器
HttpClient httpclient = new DefaultHttpClient();
//发送post请求
HttpResponse response = httpclient.execute(httppost);
return readStream(response.getEntity().getContent());
}
/**
* 发送请求
* @param path 请求路径
* @param params 请求参数 key为参数名称 value为参数值
* @param encode 请求参数的编码
*/
public static byte[] post(String path, Map params, String encode) throws Exception
{
//String params = "method=save&name="+ URLEncoder.encode("老毕", "UTF-8")+ "&age=28&";//需要发送的参数
StringBuilder parambuilder = new StringBuilder("");
if(params!=null && !params.isEmpty())
{
for(Map.Entry entry : params.entrySet())
{
parambuilder.append(entry.getKey()).append("=")
.append(URLEncoder.encode(entry.getValue(), encode)).append("&");
}
parambuilder.deleteCharAt(parambuilder.length()-1);
}
byte[] data = parambuilder.toString().getBytes();
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置允许对外发送请求参数
conn.setDoOutput(true);
//设置不进行缓存
conn.setUseCaches(false);
conn.setConnectTimeout(5 * 1000);
conn.setRequestMethod("POST");
//下面设置http请求头
conn.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
conn.setRequestProperty("Accept-Language", "zh-CN");
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", String.valueOf(data.length));
conn.setRequestProperty("Connection", "Keep-Alive");
//发送参数
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(data);//把参数发送出去
outStream.flush();
outStream.close();
if(conn.getResponseCode()==200)
{
return readStream(conn.getInputStream());
}
return null;
}
/**
* 读取流
* @param inStream
* @return 字节数组
* @throws Exception
*/
public static byte[] readStream(InputStream inStream) throws Exception
{
ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = -1;
while( (len=inStream.read(buffer)) != -1)
{
outSteam.write(buffer, 0, len);
}
outSteam.close();
inStream.close();
return outSteam.toByteArray();
}
}Sengaja saya jumpa artikel yang diulang cetak sebelum ini boleh baca sempena di atas...: Gunakan HttpConnection untuk memuat naik fail mp3
Ringkasan bahagian ini:
Abaikan sahaja bahagian ini... Untuk bahagian lanjutan seperti muat naik fail, saya hanya akan mengajar anda cara menggunakan pihak ketiga, yang diperlukan dalam projek Digunakan Pihak ketiga boleh terus menyalin kod 1 dan mengimport android-async-http!
