我正在制作一个Android应用程序。我已经建立了一个带有用户表（user_id，user_name，user_surname，user_image，email，birthdate）的数据库。我已经建立了数据库连接，用户登录，注册。它们可以工作，但是我想通过在android gallery中选择图像来仅更新用户图像。 android代码似乎还可以，但是我认为问题出在.php代码中，因为它不返回任何内容，也不响应任何错误。 android代码显示线程jsonObject = null，response [] 而我的php代码是这个
<?php
require_once '../includes/DbConnect.php';
$errorMsg = array();
$upload_dir = 'images/';
if(isset($_GET['user_id'])){
$user_id = $_GET['user_id'];
$sql = "select * from user where user_id=".$user_id;
$result = mysqli_query($conn, $sql);
if(mysqli_num_rows($result) > 0){
$row = mysqli_fetch_assoc($result);
}else{
$errorMsg['error'] = true;
$errorMsg['message'] = 'Could not select a record';
}
}
if(isset($_POST['btnUpdate'])){
$user_name = $_POST['user_name'];
$user_surname = $_POST['user_surname'];
$email = $_POST['email'];
$user_password = $_POST['user_password'];
$birthdate = $_POST['birthdate'];
$imgName = $_FILES['myfile']['name'];
$imgTmp = $_FILES['myfile']['tmp_name'];
$imgSize = $_FILES['myfile']['size'];
if(empty($user_name)){
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please input name';
}elseif(empty($user_surname)){
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please input your last name';
}elseif(empty($email)){
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please input email';
}elseif(empty($user_password)){
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please input password';
}elseif(empty($birthdate)){
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please input birthdate';
}
//udate image if user select new image
if($imgName){
//get image extension
$imgExt = strtolower(pathinfo($imgName, PATHINFO_EXTENSION));
//allow extenstion
$allowExt = array('jpeg', 'jpg', 'png', 'gif');
//random new name for photo
$userPic = time().'_'.rand(1000,9999).'.'.$imgExt;
//check a valid image
if(in_array($imgExt, $allowExt)){
//check image size less than 5MB
if($imgSize < 5000000){
//delete old image
unlink($upload_dir.$row['user_image']);
move_uploaded_file($imgTmp ,$upload_dir.$userPic);
}else{
$errorMsg['error'] = true;
$errorMsg['message'] = 'Image too large';
}
}else{
$errorMsg['error'] = true;
$errorMsg['message'] = 'Please select a valid image';
}
}else{
//if not select new image - use old image name
$userPic = $row['user_image'];
}
//check upload file not error than insert data to database
if(!isset($errorMsg['message'])){
$sql = "update user
set user_name = '.$user_name.',
user_surname = '.$user_surname.',
email = '.$email',
user_password = '.$user_password',
birthdate = '.$birthdate',
user_image = '.$userPic.'
where user_id=".$user_id;
$result = mysqli_query($conn, $sql);
if($result){
$errorMsg['error'] = false;
$errorMsg['message'] = 'New record updated successfully';
header('refresh:5;index.php');
}else{
$errorMsg['error'] = true;
$errorMsg['message'] = 'Error '.mysqli_error($conn);
}
}
}
echo json_encode($errorMsg);
这是android代码
package com.app.app.bookreview.UserProfile;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.app.app.bookreview.R;
import com.app.app.bookreview.RequestHandler;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import de.hdodenhof.circleimageview.CircleImageView;
public class PhotoReviewActivity extends AppCompatActivity implements View.OnClickListener{
private Button uploadPhotoButton, chooseAnotherPhotoButton;
private CircleImageView profilePhoto;
private final int IMG_REQUEST = 1;
private Bitmap bitmap;
private String UploadUrl = "http://192.168.0.122/book_review/v1/userUpdate.php";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo_review);
uploadPhotoButton = (Button) findViewById(R.id.upload_photo_button);
chooseAnotherPhotoButton = (Button) findViewById(R.id.choose_another_photo_button);
profilePhoto = (CircleImageView) findViewById(R.id.profile_circle);
uploadPhotoButton.setOnClickListener(this);
chooseAnotherPhotoButton.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.choose_another_photo_button:
selectImage();
break;
case R.id.upload_photo_button:
uploadImage();
break;
}
}
private void selectImage()
{
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, IMG_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==IMG_REQUEST && resultCode==RESULT_OK && data!=null)
{
Uri path = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(),path);
profilePhoto.setImageBitmap(bitmap);
profilePhoto.setVisibility(View.VISIBLE);
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void uploadImage()
{
StringRequest stringRequest = new StringRequest(Request.Method.POST, UploadUrl,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(response);
String Response = jsonObject.getString("response");
Toast.makeText(PhotoReviewActivity.this, Response,Toast.LENGTH_LONG).show();
profilePhoto.setImageResource(0);
profilePhoto.setVisibility(View.GONE);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
})
{
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<>();
params.put("image", imageToString(bitmap));
return params;
}
};
RequestHandler.getInstance(PhotoReviewActivity.this).addToRequestQueue(stringRequest);
}
private String imageToString(Bitmap bitmap)
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG,100,byteArrayOutputStream);
byte[] imgBytes = byteArrayOutputStream.toByteArray();
return Base64.encodeToString(imgBytes,Base64.DEFAULT);
}
}
感谢您的帮助