我目前正在编写android代码，通过PHP使用位图从手机将图像上传到mysql数据库(数据类型:blob)，但是，android不断发布此错误。
07-20 21:55:51.974 10963-11125/gl.helloworld.reportify D/ReportAsyncTask: Sending data[{image=/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB
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07-20 21:55:52.460 10963-10963/edu.nyp.reportify D/ReportAsyncTask: <br /><font size='1'><table class='xdebug-error xe-notice' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Notice: Undefined index: image in C:\wamp\www\safeproject\uploadReport.php on line <i>5</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0011</td><td bgcolor='#eeeeec' align='right'>241240</td><td bgcolor='#eeeeec'>{main}( )</td><td title='C:\wamp\www\safeproject\uploadReport.php' bgcolor='#eeeeec'>..\uploadReport.php<b>:</b>0</td></tr></table></font><br /><font size='1'><table class='xdebug-error xe-notice' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Notice: Undefined variable: con in C:\wamp\www\safeproject\uploadReport.php on line <i>8</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0011</td><td bgcolor='#eeeeec' align='right'>241240</td><td bgcolor='#eeeeec'>{main}( )</td><td title='C:\wamp\www\safeproject\uploadReport.php' bgcolor='#eeeeec'>..\uploadReport.php<b>:</b>0</td></tr></table></font><br /><font size='1'><table class='xdebug-error xe-warning' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Warning: mysqli_prepare() expects parameter 1 to be mysqli, null given in C:\wamp\www\safeproject\uploadReport.php on line <i>8</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0011</td><td bgcolor='#eeeeec' align='right'>241240</td><td bgcolor='#eeeeec'>{main}( )</td><td title='C:\wamp\www\safeproject\uploadReport.php' bgcolor='#eeeeec'>..\uploadReport.php<b>:</b>0</td></tr><tr><td bgcolor='#eeeeec' align='center'>2</td><td bgcolor='#eeeeec' align='center'>0.0857</td><td bgcolor='#eeeeec' align='right'>251704</td><td bgcolor='#eeeeec'><a href='http://www.php.net/function.mysqli-prepare' target='_new'>mysqli_prepare</a>( )</td><td title='C:\wamp\www\safeproject\uploadReport.php' bgcolor='#eeeeec'>..\uploadReport.php<b>:</b>8</td></tr></table></font><br /><font size='1'><table class='xdebug-error xe-warning' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Warning: mysqli_stmt_bind_param() expects parameter 1 to be mysqli_stmt, null given in C:\wamp\www\safeproject\uploadReport.php on line <i>10</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='
这是我的 php 代码
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
$image = $_POST['image'];
require_once('dbConnect.php');
$sql = "INSERT INTO images (image) VALUES (?)";
$stmt = mysqli_prepare($con,$sql);
mysqli_stmt_bind_param($stmt,"s",$image);
mysqli_stmt_execute($stmt);
$check = mysqli_stmt_affected_rows($stmt);
if($check == 1){
echo "Image Uploaded Successfully";
}else{
echo "Error Uploading Image";
}
mysqli_close($con);
}else{
echo "Error";
}
这是我的 ReportAsyncTask 代码
public class ReportAsyncTask extends AsyncTask<Bitmap, Void, String> {
private final static String TAG = "ReportAsyncTask";
public static final String UPLOAD_URL = "http://192.168.1.8/safeproject/uploadReport.php";
public static final String UPLOAD_KEY = "image";
private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
StringBuilder result = new StringBuilder();
boolean first = true;
for (Map.Entry<String, String> entry : params.entrySet()) {
if (first)
first = false;
else
result.append("&");
result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
result.append("=");
result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
}
return result.toString();
}
public String sendPostRequest(HashMap<String, String> postDataParams, String requestURL) {
String result = "";
try {
Log.d(TAG, "Sending data[" + postDataParams + "]");
// create HttpPost
URL url = new URL(requestURL);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = null;
try {
urlConnection.setRequestMethod("POST");
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
DataOutputStream outputStream = new DataOutputStream(urlConnection.getOutputStream());
outputStream.flush();
outputStream.close();
// receive response as inputStream
inputStream = new BufferedInputStream(urlConnection.getInputStream());
if (inputStream != null)
// convert inputstream to string
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} finally {
if (inputStream != null)
inputStream.close();
if (urlConnection != null)
urlConnection.disconnect();
}
} catch (Exception e) {
e.printStackTrace();
result = "Connection error";
Log.d(TAG, result);
}
return result;
}
private static String convertInputStreamToString(
InputStream inputStream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(inputStream));
String line = "";
String result = "";
while ((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
public String getStringImage(Bitmap bmp) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
return encodedImage;
}
@Override
protected String doInBackground(Bitmap... params) {
Bitmap bitmap = params[0];
String uploadImage = getStringImage(bitmap);
HashMap<String, String> image = new HashMap<>();
image.put(UPLOAD_KEY, uploadImage);
String result = sendPostRequest(image, UPLOAD_URL);
return result;
}
@Override
protected void onPostExecute(String response) {
Log.d(TAG, response);
}
}
最佳答案
到达 php 的帖子不包含“图像”。 也许它超出了最大帖子大小，请检查此 Increase maximum post size
关于php - Asynctask 不适用于 PHP Post Image，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38485843/