我正在尝试使用MultipartEntityBuilder和HttpURLConnection将图像发送到服务器，然后收到一个字符串答案（现在它使用http协议但是我将使用https使用此代码，或者非常类似的东西）。但是当我按下按钮发送它时，应用程序崩溃了，而logcat并没有告诉我有关捕获的任何信息。我所在的类的代码是下一个：
public class EnvioImagenes extends AsyncTask<String, Void, String>
{
public String direccion="";
public EnvioImagenes(String cuerpo){
direccion=cuerpo;
}
protected String doInBackground(String... url){
Bitmap bitmap = null;
ByteArrayOutputStream bos=new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos);
ContentBody contentPart = new ByteArrayBody(bos.toByteArray(), direccion);
MultipartEntityBuilder multipartEntity = MultipartEntityBuilder.create();
multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
multipartEntity.addPart("Picture",contentPart);
try {
HttpURLConnection connection = (HttpURLConnection) new URL(url[0]).openConnection();
connection.setReadTimeout(10000);
connection.setConnectTimeout(15000);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
//Si quiero enviar/recibir una respuesta en el cuerpo del mensaje, tiene que estar lo siguiente:
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestProperty("Connection", "Keep-Alive");
String boundary= "--------------"+System.currentTimeMillis();
multipartEntity.setBoundary(boundary);
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
DataOutputStream dos=new DataOutputStream(connection.getOutputStream());
//connection.addRequestProperty(multipartEntity.getClass().getName(), multipartEntity.getClass().toString());
//OutputStream output=new BufferedOutputStream(connection.getOutputStream());
dos.writeBytes("\r\n");
dos.flush();
dos.close();
//output.write(body.getBytes());
//output.flush();
int responseCode = connection.getResponseCode();
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line;
StringBuilder result = new StringBuilder();
while ((line = bufferedReader.readLine()) != null) {
result.append(line);
}
String responseString = result.toString();
inputStream.close();
connection.disconnect();
return responseString;
} catch(Exception exc) {
String error = exc.toString();
Log.e("This is the mistake.....", exc.getMessage());
return error;
}
}
}
我下载了下载它的MultipartEntityBuilder库，如下链接所示：Android - MultipartEntity and dependencies。问题是，当build.gradle检查是否正常时，它会向我显示此警告：
Warning:WARNING: Dependency org.apache.httpcomponents:httpclient:4.5.3 is ignored for release as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage it with jarjar to change the class packages.
我试图解决它从浏览器下载软件包然后将其粘贴到库中的文件夹/ lib中，然后更改build.gradle中的代码以使程序从那里检查库，但随后我错了，我没有检测到我使用MultipartEntityBuilder的代码中的库;所以我认为问题在于代码本身：特别是因为我不使用httpClient。对于任何问题，build.gradle中的代码实际上就是这个：
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.0"
defaultConfig {
applicationId "com.example.franco.pruebalogin"
minSdkVersion 10
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.0.0'
compile 'com.android.support:design:24.0.0'
compile 'org.apache.httpcomponents:httpmime:4.5.3'
}
答案 0 :(得分：0)
我走了那条路，但最终转向使用SyncHttpClient。
private static final String COMPRESSED_FILE_PREFIX = "yourapp_image_compressed_";
private static final String JPEG_FILE_EXTENSION = ".jpeg";
private static final int FIVE_MINUTE_INIT_TIMEOUT = 300000;
public void uploadImage(Context applicationContext, ArrayList<String> filePathsToUpload) {
RequestParams requestParams = new RequestParams();
File imagesCacheDir;
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)) {
imagesCacheDir = new File(
android.os.Environment.getExternalStorageDirectory(),
"/Android/data/com.example.yourapp/UploadPics");
} else {
imagesCacheDir = applicationContext.getCacheDir();
}
if (!imagesCacheDir.exists()) {
if (!imagesCacheDir.mkdirs()) {
throw new RuntimeException("Image directory could not be created.");
}
}
for (String filePath : filePathsToUpload) {
File file;
try {
FileOutputStream out = new FileOutputStream(new File(imagesCacheDir,
COMPRESSED_FILE_PREFIX + filePathsToUpload.size() + 1 + JPEG_FILE_EXTENSION));
BitmapFactory.decodeFile(filePath).compress(Bitmap.CompressFormat.JPEG, compress ? 90 : 100, out);
file = new File(imagesCacheDir, COMPRESSED_FILE_PREFIX + filePathsToUpload.size() + 1 + JPEG_FILE_EXTENSION);
requestParams.put(file.getName(), file);
out.close();
} catch (FileNotFoundException fnfe) {
throw new RuntimeException("Image file not found.");
} catch (IOException ie) {
throw new RuntimeException("Error writing image to file.);
}
}
SyncHttpClient client = new SyncHttpClient();
client.setTimeout(FIVE_MINUTE_INIT_TIMEOUT);
Map<String, String> headers = VolleyUtils.getBigOvenHeaders();
headers.putAll(VolleyUtils.getAuthenticationHeader());
for (String headerKey : headers.keySet()) {
client.addHeader(headerKey, headers.get(headerKey));
}
MySSLSocketFactory socketFactory;
try {
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
trustStore.load(null, null);
socketFactory = new MySSLSocketFactory(trustStore);
socketFactory.setHostnameVerifier(MySSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
client.setSSLSocketFactory(socketFactory);
} catch (Exception e) {
// Probably should die or something, unless http is okay (if you need https, this is no go)
}
client.setTimeout(FIVE_MINUTE_INIT_TIMEOUT);
client.post(this, "https://www.myapp.com/imageUploader", requestParams, new RotatingBitmapTextHttpResponseHandler(filePathsToUpload, notificationBuilder, onCompletionText));
}
您可以将HttpResponseHandler更改为您想要的任何内容。在这种情况下，我创建了一个跟踪进度的类，并在通知中显示它。你可以做任何你喜欢的事情。