Java doInBackground()中出错->;NoClassDefFoundError:org.apache.http.entity.ContentType
我正在上传一个图像到服务器。执行此操作时,Java doInBackground()中出错->;NoClassDefFoundError:org.apache.http.entity.ContentType,java,android,apache,android-asynctask,Java,Android,Apache,Android Asynctask,我正在上传一个图像到服务器。执行此操作时,Asynctask中出现一些错误。使用文件上载添加部分。我是新手,所以请帮助我。 据我介绍,变量filepath在Asynctask中存在一些问题。 我的manifest.xml文件具有所需的权限 public class UploadActivity extends Activity{ private String filePath = null; private Button btnUpload; @Override protected void
Asynctask
中出现一些错误。使用文件上载添加部分。我是新手,所以请帮助我。
据我介绍,变量filepath在Asynctask
中存在一些问题。
我的manifest.xml
文件具有所需的权限
public class UploadActivity extends Activity{
private String filePath = null;
private Button btnUpload;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);
btnUpload = (Button) findViewById(R.id.btnUpload);
// Receiving the data from previous activity
Intent i = getIntent();
// image or video path that is captured in previous activity
filePath = i.getStringExtra("filePath");
btnUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// uploading the file to server
new Upload().execute();
}
});
}
/**
* Uploading the file to server
* */
private class Upload extends AsyncTask<Void, Integer, String> {
@Override
protected String doInBackground(Void... params) {
return uploadFile();
}
@SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.1.102/fileUpload.php");
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
File sourceFile = new File(filePath);
// Adding file data to http body
entity.addPart("image", new FileBody(sourceFile));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
return responseString;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
}
}
}
公共类上载活动扩展活动{
私有字符串filePath=null;
专用按钮btnUpload;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_上传);
btnUpload=(按钮)findViewById(R.id.btnUpload);
//从以前的活动接收数据
Intent i=getIntent();
//在以前的活动中捕获的图像或视频路径
filePath=i.getStringExtra(“filePath”);
btnUpload.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
//将文件上载到服务器
新建上载().execute();
}
});
}
/**
*将文件上载到服务器
* */
私有类上载扩展异步任务{
@凌驾
受保护字符串doInBackground(无效…参数){
返回上传文件();
}
@抑制警告(“弃用”)
私有字符串上传文件(){
字符串responseString=null;
试一试{
HttpClient HttpClient=新的DefaultHttpClient();
HttpPost HttpPost=新的HttpPost(“http://192.168.1.102/fileUpload.php");
MultipartEntity=新的MultipartEntity(HttpMultipartMode.BROWSER_兼容);
文件源文件=新文件(文件路径);
//将文件数据添加到http正文
addPart(“image”,新的文件体(sourceFile));
totalSize=entity.getContentLength();
httppost.setEntity(实体);
//进行服务器呼叫
HttpResponse response=httpclient.execute(httppost);
HttpEntity r_entity=response.getEntity();
int statusCode=response.getStatusLine().getStatusCode();
如果(状态代码==200){
//服务器响应
responseString=EntityUtils.toString(r_实体);
}否则{
responseString=“发生错误!Http状态代码:”
+状态码;
}
}捕获(客户端协议例外e){
responseString=e.toString();
}捕获(IOE异常){
responseString=e.toString();
}
回报率;
}
@凌驾
受保护的void onPostExecute(字符串结果){
super.onPostExecute(结果);
}
}
}
错误日志:
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:278)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:864)
Caused by: java.lang.NoClassDefFoundError: org.apache.http.entity.ContentType
at org.apache.http.entity.mime.content.FileBody.<init>(FileBody.java:89)
at com.example.apurwa.camera.UploadActivity$Upload.uploadFile(UploadActivity.java:104)
at com.example.apurwa.camera.UploadActivity$Upload.doInBackground(UploadActivity.java:91)
at com.example.apurwa.camera.UploadActivity$Upload.doInBackground(UploadActivity.java:83)
at android.os.AsyncTask$2.call(AsyncTask.java:264)
java.lang.RuntimeException:执行doInBackground()时出错
在android.os.AsyncTask$3.done(AsyncTask.java:278)
位于java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
位于java.util.concurrent.FutureTask.setException(FutureTask.java:124)
位于java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
位于java.util.concurrent.FutureTask.run(FutureTask.java:137)
在android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
位于java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
位于java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
运行(Thread.java:864)
原因:java.lang.NoClassDefFoundError:org.apache.http.entity.ContentType
位于org.apache.http.entity.mime.content.FileBody.(FileBody.java:89)
位于com.example.apurwa.camera.UploadActivity$Upload.uploadFile(UploadActivity.java:104)
位于com.example.apurwa.camera.UploadActivity$Upload.doInBackground(UploadActivity.java:91)
位于com.example.apurwa.camera.UploadActivity$Upload.doInBackground(UploadActivity.java:83)
位于android.os.AsyncTask$2.call(AsyncTask.java:264)
您的问题很可能是没有正确导入org.apache.http
库。这就是为什么崩溃会给您java.lang.NoClassDefFoundError
您需要做的是确保正确导入库。因此,如果您使用的是Eclipse
,那么从下面的表单下载JAR文件
如果您使用的是Android Studio
,那么请确保您在Gradle
文件中的依赖关系
再看看这个,,它讨论了与您类似的问题将包含org.apache.http.entity.ContentType的库添加到构建路径。我检查过,基本上没有依赖性问题。原因是:java.lang.NoClassDefFoundError:org.apache.http.entity.mime.content.AbstractContentBody上的org.apache.http.util.Args,我现在就试试看。