我在这里面临一个问题：在Android中使用httpPost上传照片。基本上，这就是我在做的事情：
String result = "";
boolean isOperationOk = false;
File file;
file = new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() + File.separator + "USER_ID_" + String.valueOf(user.getId()) + "_foto.jpg");
MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
try {
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
fo.write(user.getFoto());
fo.close();
} catch (IOException e) {
e.printStackTrace();
}
//MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(context.getString(R.string.webservice));
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(4);
nameValuePair.add(new BasicNameValuePair("op", "photo-upload"));
nameValuePair.add(new BasicNameValuePair("hash", context.getString(R.string.hash_webservice)));
nameValuePair.add(new BasicNameValuePair("photo", file.getAbsolutePath()));
nameValuePair.add(new BasicNameValuePair(User.TAGid, String.valueOf(user.getId())));
for (int index = 0; index < nameValuePair.size(); index++) {
if (nameValuePair.get(index).getName().equalsIgnoreCase("photo")) {
// If the key equals to "image", we use FileBody to transfer the data
multipartEntity.addPart(nameValuePair.get(index).getName(),
new FileBody(new File(nameValuePair.get(index).getValue())));
} else {
// Normal string data
multipartEntity.addPart(nameValuePair.get(index).getName(),new StringBody(nameValuePair.get(index).getValue(), ContentType.TEXT_PLAIN));
}
}
//httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
httpPost.setEntity(multipartEntity);
HttpResponse response = httpClient.execute(httpPost);
if (response.getStatusLine().getStatusCode() == 200)
{
HttpEntity entity = response.getEntity();
result = EntityUtils.toString(entity);
}
if(result != ""){
JSONObject reader = new JSONObject(result);
isOperationOk = reader.getBoolean("valid");
this.message = reader.getString("message");
}else
isOperationOk = false;
return isOperationOk;
我认为这段代码不对（我从Stackoverflow的一个问题得到了这个）。我相信我使用的是错误的lib jar。好吧，这是我的build.gradle文件（我使用的是Android Studio）：
android {
packagingOptions {
exclude 'META-INF/DEPENDENCIES.txt'
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/dependencies.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/notice.txt'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/LICENSE'
exclude 'META-INF/license.txt'
}
compileSdkVersion 23
buildToolsVersion "23.0.1"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "br.com.app"
minSdkVersion 11
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
这是依赖项：
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
//testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
compile 'com.google.android.gms:play-services-gcm:8.3.0'
compile 'com.android.support:support-v4:23.1.1'
compile files ('libs/httpcore-4.4.4.jar')
compile files ('libs/org.apache.httpcomponents.httpclient_4.5.1.jar')
}
我使用的是正确的图书馆吗？因为这是我在尝试上传照片时所得到的：
11-26 07:49:37.377 32565-32726/br.com.app E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
Process: br.com.app, PID: 32565
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NoSuchFieldError: No static field INSTANCE of type Lorg/apache/http/message/BasicHeaderValueFormatter; in class Lorg/apache/http/message/BasicHeaderValueFormatter; or its superclasses (declaration of 'org.apache.http.message.BasicHeaderValueFormatter' appears in /system/framework/ext.jar)
at org.apache.http.entity.ContentType.toString(ContentType.java:153)
at org.apache.http.entity.mime.MultipartFormEntity.<init>(MultipartFormEntity.java:53)
at org.apache.http.entity.mime.MultipartEntityBuilder.buildEntity(MultipartEntityBuilder.java:236)
at org.apache.http.entity.mime.MultipartEntity.getEntity(MultipartEntity.java:119)
at org.apache.http.entity.mime.MultipartEntity.isChunked(MultipartEntity.java:138)
at org.apache.http.protocol.RequestContent.process(RequestContent.java:84)
at org.apache.http.protocol.BasicHttpProcessor.process(BasicHttpProcessor.java:295)
at org.apache.http.protocol.HttpRequestExecutor.preProcess(HttpRequestExecutor.java:165)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:427)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:580)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:503)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:481)
at sync.HttpPostRecordTask.uploadPhoto(HttpPostRecordTask.java:348)
at sync.HttpPostRecordTask.doInBackground(HttpPostRecordTask.java:145)
at sync.HttpPostRecordTask.doInBackground(HttpPostRecordTask.java:42)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
如果有人帮助我，我会做出准备。
编辑 gradle构建文件
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.3.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
答案 0 :(得分：1)
DefaultHttpClient已弃用，请使用url.openConnection()代替：
List<BasicNameValuePair> nameValuePairs = new ArrayList<>();
nameValuePairs.add(new BasicNameValuePair("origin", origin.toString()));
nameValuePairs.add(new BasicNameValuePair("destination", destination.toString() ));
nameValuePairs.add(new BasicNameValuePair("sensor", "false"));
String paramString = URLEncodedUtils.format(nameValuePairs, "utf-8");
并在AsyncTask
String response = "";
URL url = new URL(Config.URL_PREFIX + "?" + paramString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setConnectTimeout(Consts.CONNECT_TIMEOUT);
conn.setReadTimeout(Consts.READ_TIMEOUT);
//Send request
DataOutputStream wr = new DataOutputStream (
conn.getOutputStream());
wr.flush();
wr.close();
//Get Response
InputStream is = conn.getInputStream();
StringBuilder sb = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
response = sb.toString();
reader.close();
然后处理收到的回复。
答案 1 :(得分：0)
从您的项目中移除lib httpcore-4.4.4.jar ， org.apache.httpcomponents.httpclient_4.5.1.jar
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
packagingOptions {
exclude 'META-INF/DEPENDENCIES.txt'
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/dependencies.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/notice.txt'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/LICENSE'
exclude 'META-INF/license.txt'
}
defaultConfig {
applicationId "com.dev.hb.testing"
manifestPlaceholders = [manifestApplicationId: "${applicationId}"]
minSdkVersion 11
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile('org.apache.httpcomponents:httpmime:4.3.6') {
exclude module: 'httpclient'
}
compile 'com.android.support:design:23.1.1'
compile 'com.google.android.gms:play-services-gcm:8.3.0'
compile 'org.apache.httpcomponents:httpclient-android:4.3.5'
}