的Android / Java的：找不到MultipartEntity类，尽管其添加到构建路径 [英] Android/Java: Can't find MultipartEntity class despite adding it to build path
问题描述
我正在写一个应用程序，让用户选择一张照片已经是他们的手机并上传到服务器上。不幸的是，当我点击按钮发送照片断绝，在logcat中我看到的：
I'm writing an app that lets a user choose a photo already on their phone and uploads it to a server. Unfortunately when I click the button to send the photo to the sever, in logcat I see:
Could not find class 'org.apache.http.entity.mime.MultipartEntity', referenced from method com.example.crescentcameraapp.MainActivity$ImageUploadTask.doInBackground
我见过的所有的堆栈溢出存在的类似的问题：
I've seen all the similar questions that exist on stack overflow:
-
<一个href=\"http://stackoverflow.com/questions/13190009/android-post-image-to-the-server-using-multipartentity\">Android后的图像使用MultipartEntity 服务器
<一个href=\"http://stackoverflow.com/questions/13619862/dalvik-cannot-find-class-inside-external-jar-through-reflection\">Dalvik无法找到通过反射外部JAR内部类
有几个，但问题是，他们都没有一个很好的答案。解决方案包括：
There are a few more, but the point is, none of them have a good answer. Solutions include:
-
下载所有必要的罐子
http://hc.apache.org/downloads.cgi 并把它们添加到Java构建
路径在Eclipse。**不行的。我已经试过了，清洗
项目，关闭/打开Eclipse中。什么也没有。
"Download all the necessary jars from http://hc.apache.org/downloads.cgi and add them to the Java Build Path in Eclipse." ** Doesn't work. I've tried it, cleaned the project, closed/opened Eclipse. Nothing.
添加所有的jar添加到库文件夹中的项目，Android为
休息。**不过，这是行不通的。我不知道为什么。
"Add all the jars to the libs folder in your project, Android does the rest." **Still, it doesn't work. I don't know why.
由于某些原因，即使它张贴此错误的logcat，它继续运行，只有当我尝试使用我的code创建的对象MultiPartEntity崩溃以后。下面是logcat的其余部分：
For some reason, even though it posts this error to logcat, it continues running and only crashes later when I try to use the MultiPartEntity object I created in the code. Here's the rest of the logcat:
06-17 21:21:34.396: E/dalvikvm(14917): Could not find class 'org.apache.http.entity.mime.MultipartEntity', referenced from method com.example.crescentcameraapp.MainActivity$ImageUploadTask.doInBackground
06-17 21:21:34.396: W/dalvikvm(14917): VFY: unable to resolve new-instance 652 (Lorg/apache/http/entity/mime/MultipartEntity;) in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;
06-17 21:21:34.396: D/dalvikvm(14917): VFY: replacing opcode 0x22 at 0x002b
06-17 21:21:34.396: I/dalvikvm(14917): DexOpt: unable to optimize static field ref 0x0422 at 0x2d in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.396: D/dalvikvm(14917): DexOpt: unable to opt direct call 0x10e8 at 0x2f in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.396: D/dalvikvm(14917): DexOpt: unable to opt direct call 0x10eb at 0x56 in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.396: D/dalvikvm(14917): DexOpt: unable to opt direct call 0x10eb at 0x62 in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.396: D/dalvikvm(14917): DexOpt: unable to opt direct call 0x10ea at 0x6e in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.396: D/dalvikvm(14917): DexOpt: unable to opt direct call 0x10eb at 0x85 in Lcom/example/crescentcameraapp/MainActivity$ImageUploadTask;.doInBackground
06-17 21:21:34.401: W/dalvikvm(14917): threadid=11: thread exiting with uncaught exception (group=0x412192a0)
06-17 21:21:34.406: E/AndroidRuntime(14917): FATAL EXCEPTION: AsyncTask #1
06-17 21:21:34.406: E/AndroidRuntime(14917): java.lang.RuntimeException: An error occured while executing doInBackground()
06-17 21:21:34.406: E/AndroidRuntime(14917): at android.os.AsyncTask$3.done(AsyncTask.java:299)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
06-17 21:21:34.406: E/AndroidRuntime(14917): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.lang.Thread.run(Thread.java:856)
06-17 21:21:34.406: E/AndroidRuntime(14917): Caused by: java.lang.NoClassDefFoundError: org.apache.http.entity.mime.MultipartEntity
06-17 21:21:34.406: E/AndroidRuntime(14917): at com.example.crescentcameraapp.MainActivity$ImageUploadTask.doInBackground(MainActivity.java:244)
06-17 21:21:34.406: E/AndroidRuntime(14917): at com.example.crescentcameraapp.MainActivity$ImageUploadTask.doInBackground(MainActivity.java:1)
06-17 21:21:34.406: E/AndroidRuntime(14917): at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-17 21:21:34.406: E/AndroidRuntime(14917): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
06-17 21:21:34.406: E/AndroidRuntime(14917): ... 5 more
06-17 21:21:43.731: I/Choreographer(14917): Skipped 534 frames! The application may be doing too much work on its main thread.
06-17 21:21:44.856: E/WindowManager(14917): Activity com.example.crescentcameraapp.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41c93710 that was originally added here
06-17 21:21:44.856: E/WindowManager(14917): android.view.WindowLeaked: Activity com.example.crescentcameraapp.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41c93710 that was originally added here
还有更精彩的，但你明白了吧。下面是有关code。 ImageUploadTask是一个内部类：
There's more, but you get the point. Below is the relevant code. ImageUploadTask is an inner class:
class ImageUploadTask extends AsyncTask <Void, Void, String>{
@SuppressWarnings("deprecation")
@Override
protected String doInBackground(Void... unsued) {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(
getString(R.string.web_url_text)
+ "/test.php"
);
MultipartEntity entity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
imageBMP.compress(CompressFormat.JPEG, 100, bos);
byte[] data = bos.toByteArray();
entity.addPart("photoId", new StringBody(getIntent()
.getStringExtra("photoId")));
entity.addPart("returnformat", new StringBody("json"));
entity.addPart("uploaded", new ByteArrayBody(data,
"myImage.jpg"));
String captionText = findViewById(R.string.caption_text).toString();
entity.addPart("photoCaption", new StringBody(captionText));
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost,
localContext);
BufferedReader reader = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent(), "UTF-8"));
String sResponse = reader.readLine();
return sResponse;
} catch (Exception e) {
if (dialog.isShowing())
dialog.dismiss();
Toast.makeText(getApplicationContext(),
"Error sending file to server...",
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
return null;
}//end of catch
}
protected void onPostExecute(String sResponse) {
Toast.makeText(getApplicationContext(), "Upload completed.", Toast.LENGTH_LONG).show();
}//onPostExecute()
}//end of class ImageUploadTask
感谢。
推荐答案
我想通了，总部设在在我联系到相关问题提供的解决方案的一部分。我清理项目，重新启动Eclipse的，然后我下载并添加mime4j到我的构建路径：
I figured it out, based in part on the solutions provided in the relevant questions I linked to. I cleaned the project, restarted eclipse, and then I downloaded and added mime4j to my build path:
http://james.apache.org/download.cgi#Apache_Mime4J
以上页面是官方下载，但它并没有为我工作。尝试SourceForge上的一种替代方案：
The above page is the official download, but it didn't work for me. Try sourceforge for an alternative:
http://sourceforge.net/projects/mime4j/?source=dlp
请注意：
添加此几乎肯定会导致你的项目有彬/ dexedLibs问题。如果是这样，你可能在一个有点噩梦。你会得到关于在多个罐子被定义特定对象/类/异常的控制台错误信息。这是因为dexedLibs文件夹包含表面上在libs文件夹的罐子的副本。刚刚从项目中删除原件（一个在你的libs文件夹），清洁液，然后再编译。你可能会得到大约乘法定义的类控制台新的抱怨，但是这只是意味着你有更多的罐子删除。这是我如何解决了这个问题。
Adding this will almost certainly cause issues with bin/dexedLibs in your project. If so, you're probably in for a bit of a nightmare. You'll get console error messages about certain objects/classes/exceptions being defined across multiple jars. This is because the dexedLibs folder ostensibly contains copies of the jars in your libs folder. Just delete the original copy (the one in your libs folder) from your project, clean the solution, and build it again. You might get new complains in the console about multiply defined classes, but that just means you have more jars to delete. This is how I solved the problem.
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