Android 在部分华为手机上出现乱码的问题

Android APP 在部分华为手机上出现了乱码问题，找了好久了终于找到原因了

前后台post请求体编码和解码时一致的 URL；UTF－8

但是还是出现了乱码，原因如下：

Content-Type:application/x-www-form-urlencoded; charset=UTF-8，application/x-www-form-urlencoded; charset=utf-8

Content-Type:application/x-www-form-urlencoded含义是表示客户端提交给服务器文本内容的编码方式是URL编码，

即除了标准字符外，每字节以双字节16进制前加个“%”表示,当然还有其他编码方式,如：CONTENT-TYPE:multipart/form-data 。

Content-Type 内容重复了，格式不对，服务器识别不了，所有当发送post请求时请求体里面有中文时服务器解码不正确，所以乱码了

具体问题如下(使用了Volley请求)

1.Volley post请求是请求头会自动加上content-type

详细代码如下：

public static RequestQueuenewRequestQueue(Context context, HttpStack stack) {

File cacheDir = new File(context.getCacheDir(), "volley");

String userAgent = "volley/0";

try {

String network = context.getPackageName();

PackageInfo queue = context.getPackageManager().getPackageInfo(network,0);

userAgent = network + "/" + queue.versionCode;

} catch (NameNotFoundException var6) {

;

}

if(stack == null) {

if(VERSION.SDK_INT>= 9) {

stack = newHurlStack();

} else {

stack = newHttpClientStack(AndroidHttpClient.newInstance(userAgent));

}

BasicNetwork network1 = new BasicNetwork((HttpStack)stack);

RequestQueue queue1 = new RequestQueue(new DiskBasedCache(cacheDir),network1);

queue1.start();

return queue1;

}

HurlStack类中

publicHttpResponse performRequest(Request<?> request, Map<String, String>additionalHeaders) throws IOException, AuthFailureError {

String url = request.getUrl();

HashMap map = new HashMap();

map.putAll(request.getHeaders());

map.putAll(additionalHeaders);

if(this.mUrlRewriter != null) {

String parsedUrl =this.mUrlRewriter.rewriteUrl(url);

if(parsedUrl == null) {

throw new IOException("URLblocked by rewriter: " + url);

}

url = parsedUrl;

}

URL parsedUrl1 = new URL(url);

HttpURLConnection connection =this.openConnection(parsedUrl1, request);

//volley使用的是HttpURLConnection

Iterator responseCode =map.keySet().iterator();

while(responseCode.hasNext()) {

String protocolVersion =(String)responseCode.next();

connection.addRequestProperty(protocolVersion,(String)map.get(protocolVersion));

}

setConnectionParametersForRequest(connection, request);//注意这个方法

ProtocolVersion protocolVersion1 = newProtocolVersion("HTTP", 1, 1);

int responseCode1 =connection.getResponseCode();

if(responseCode1 == -1) {

throw new IOException("Couldnot retrieve response code from HttpUrlConnection.");

} else {

BasicStatusLine responseStatus =new BasicStatusLine(protocolVersion1, connection.getResponseCode(),connection.getResponseMessage());

BasicHttpResponse response = newBasicHttpResponse(responseStatus);

response.setEntity(entityFromConnection(connection));

Iterator var12 =connection.getHeaderFields().entrySet().iterator();

while(var12.hasNext()) {

Entry header =(Entry)var12.next();

if(header.getKey() != null) {

BasicHeader h = newBasicHeader((String)header.getKey(), (String)((List)header.getValue()).get(0));

response.addHeader(h);

}

return response;

}

下面的添加content-type请求头参数的方法

static voidsetConnectionParametersForRequest(HttpURLConnection connection,Request<?> request) throws IOException, AuthFailureError {

switch(request.getMethod()) {

case -1:

byte[] postBody =request.getPostBody();

if(postBody != null) {

connection.setDoOutput(true);

connection.setRequestMethod("POST");

connection.addRequestProperty("Content-Type", request.getPostBodyContentType());

DataOutputStream out = newDataOutputStream(connection.getOutputStream());

out.write(postBody);

out.close();

}

break;

case 0:

connection.setRequestMethod("GET");

break;

case 1:

connection.setRequestMethod("POST");

addBodyIfExists(connection,request);

break;

case 2:

connection.setRequestMethod("PUT");

addBodyIfExists(connection,request);

break;

case 3:

connection.setRequestMethod("DELETE");

break;

default:

throw newIllegalStateException("Unknown method type.");

}

private staticvoid addBodyIfExists(HttpURLConnection connection, Request<?> request)throws IOException, AuthFailureError {

byte[] body = request.getBody();

if(body != null) {

connection.setDoOutput(true);

connection.addRequestProperty("Content-Type",request.getBodyContentType());

DataOutputStream out = newDataOutputStream(connection.getOutputStream());

out.write(body);

out.close();

}

默认的请求和自己设置为post请求都会添加一个content-type

protectedString getParamsEncoding() {

return "UTF-8";

}

public String getBodyContentType() {

return"application/x-www-form-urlencoded; charset=" +this.getParamsEncoding();

}

content-type的值为application/x-www-form-urlencoded; charset=UTF-8

2.android 在部分华为手机上乱码

Volley VERSION.SDK_INT>= 9 时使用的是 HttpURLConnection

HttpURLConnection添加请求头参数的代码如下

public synchronized voidaddRequestProperty(String var1, String var2) {

if(!this.connected && !this.connecting) {

if(var1 == null) {

throw newNullPointerException("key is null");

} else {

if(this.isExternalMessageHeaderAllowed(var1, var2)) {

this.requests.add(var1, var2);

if(!var1.equalsIgnoreCase("Content-Type")){

this.userHeaders.add(var1, var2);

}

} else {

throw new IllegalStateException("Already connected");

}

// this.requests.add(var1, var2); 这段代码是加入content-type 的代码

private MessageHeader requests; //requests为MessageHeader 的实例

MessageHeader 是通过数组来存储key和value的

publicsynchronized void add(String var1, String var2) {

this.grow();

this.keys[this.nkeys] = var1;

this.values[this.nkeys] = var2;

++this.nkeys;

}

private voidgrow() {

if(this.keys == null || this.nkeys>= this.keys.length) {

String[] var1 = new String[this.nkeys + 4];

String[] var2 = new String[this.nkeys + 4];

if(this.keys != null) {

System.arraycopy(this.keys, 0,var1, 0, this.nkeys);

}

if(this.values != null) {

System.arraycopy(this.values,0, var2, 0, this.nkeys);

}

this.keys = var1;

this.values = var2;

}

正常情况下加两次content-type 会在请求头里面重新两次content-type

如下：

Content-Type:application/x-www-form-urlencoded; charset=UTF-8

Content-Type: application/x-www-form-urlencoded;charset=utf-8

但是在部分华为手机上会奇葩的自动拼接到一起

Content-Type:application/x-www-form-urlencoded; charset=UTF-8，application/x-www-form-urlencoded; charset=utf-8

看到上面的奇葩逗号没，格式不对了，服务器无法识别这种格式的请求体了编码方式了，最后出现乱码了。

具体是为什么Content-Type字段的值在部分华为的手机上为什么会拼接到一起，还没有找到原因，求大神们指导一下