我正在尝试将单个图像发布到服务器
- 我正在发出一个POST请求
- 当我发出发布请求时，图像没有发送到服务器(我 检查服务器)
我尝试了什么::
MainActivity.java
public class MainActivity extends Activity {
Button submit;
ProgressDialog pDialog;
ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
submit = (Button) findViewById(R.id.SUBMIT_BUTTON_ID);
imageView = (ImageView) findViewById(R.id.imageView1);
submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new MainTest().execute();
}
});
}
/**
* Method to post the image to the server.
* U will have to change the url which will accept the image data.
*/
private void postImageData(){
//Some random id. u can change this based on requirements
String newurl = "?" + "key=" + new Random().nextLong();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://54.218.73.244:7002/Details/"+newurl);
//Convert the bitmap drawble to a bitmap and get the string after that to send to the server
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
String image_str = Base64.encodeToString(bitmapdata, Base64.DEFAULT);
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("imageData", image_str));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
Log.v("Response", response.toString());
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
public class MainTest extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
postImageData();
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
// data=jobj.toString();
pDialog.dismiss();
}
}
}
我该如何解决这个问题？
[编辑]
我检查了服务器是否正常运行以接受图像，但它看起来运行良好!当使用 postman-tool 检查上传图片时，所以问题必须是客户端部分
MainActivity.java
public class MainActivity extends Activity {
Button submit;
ProgressDialog pDialog;
ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
submit = (Button) findViewById(R.id.SUBMIT_BUTTON_ID);
imageView = (ImageView) findViewById(R.id.imageView1);
submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new MainTest().execute();
}
});
}
/**
* Method to post the image to the server.
* U will have to change the url which will accept the image data.
* @throws IOException
*/
public void postImageData() throws IOException
{
//Some random id. u can change this based on requirements
String newurl = "?" + "key=" + new Random().nextLong();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://54.218.73.244:7002/Details/"+newurl);
//Convert the bitmap drawble to a bitmap and get the string after that to send to the server
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
String dir = Environment.getExternalStorageDirectory().toString();
OutputStream fos = null;
File file = new File(dir,"temp.JPEG");
fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
bos.flush();
bos.close();
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
File mFile = new File(dir, "temp.JPEG");
FileBody encFile = new FileBody(mFile,"image/jpeg");
entity.addPart("images", encFile);
//Another key/value parameter
//entity.addPart("UserId", new StringBody(userId));
httppost.setEntity(entity);
HttpClient client = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
System.out.println("response data:"+data);
}
public class MainTest extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
try {
postImageData();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
// data=jobj.toString();
pDialog.dismiss();
}
}
}
最佳答案
你必须使用MultipartEntity 上传图片到服务器
public void postImageData()
{
//Some random id. u can change this based on requirements
String newurl = "?" + "key=" + new Random().nextLong();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://54.218.73.244:7002/Details/"+newurl);
//Convert the bitmap drawble to a bitmap and get the string after that to send to the server
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
String dir = Environment.getExternalStorageDirectory().toString();
OutputStream fos = null;
File file = new File(dir,"temp.JPEG");
fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
bos.flush();
bos.close();
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
File mFile = new File(dir, "temp.JPEG");
FileBody encFile = new FileBody(mFile,"image/jpeg");
entity.addPart("images", encFile);
//Another key/value parameter
//entity.addPart("UserId", new StringBody(userId));
httppost.setEntity(entity);
HttpClient client = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
System.out.println("response data:"+data);
}
关于android - 从 android 向服务器发送单个图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20391766/