Php上傳圖像到服務器在Android

Question

即時通訊使用PHP腳本，允許從圖庫中選擇一個圖像，並將其上傳到在線網絡託管服務。圖片被上傳，但上傳的.jpg文件是空的，被命名爲0.jpg，大小也被顯示爲0字節。當我嘗試打開圖像它顯示

這可能是造成這種情況的可能原因「的形象http://testimage.site88.net/pic/0.jpg不能因爲它包含錯誤顯示 」？ PHP代碼是如下

<?php 
    $name = $_POST['name']; //image name 
    $image = $_POST['image']; //image in string format 

    //decode the image 
    $decodedImage = base64_decode($image); 

    //upload the image 
    file_put_contents("pic/".$name.".jpg", $decodedImage); 

的機器人的代碼是：預先

import android.app.Activity; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.drawable.BitmapDrawable; 
import android.net.Uri; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.util.Base64; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.Toast; 

import java.io.ByteArrayOutputStream; 
import java.io.UnsupportedEncodingException; 
import java.net.URLEncoder; 
import java.util.HashMap; 
import java.util.Map; 


public class MainActivity extends Activity { 
    //define global views variable 
    public ImageView imageView; 
    public Button selectImage, 
        uploadImage; 
    public String SERVER = "http://testimage.site88.net/saveImage.php", 
        timestamp; 

    private static final String TAG = MainActivity.class.getSimpleName(); 

    private static final int RESULT_SELECT_IMAGE = 1; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     //instantiate view 
     imageView = (ImageView) findViewById(R.id.imageView); 
     selectImage = (Button) findViewById(R.id.selectImage); 
     uploadImage = (Button) findViewById(R.id.uploadImage); 

     //when selectImage button is pressed 
     selectImage.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       //call the function to select image from album 
       selectImage(); 
      } 
     }); 

     //when uploadImage button is pressed 
     uploadImage.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       //get image in bitmap format 
       Bitmap image = ((BitmapDrawable) imageView.getDrawable()).getBitmap(); 
       //execute the async task and upload the image to server 
       new Upload(image,"IMG_"+timestamp).execute(); 
      } 
     }); 

    } 

    //function to select a image 
    private void selectImage(){ 
     //open album to select image 
     Intent gallaryIntent = new Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
     startActivityForResult(gallaryIntent, RESULT_SELECT_IMAGE); 
    } 

    /* 
    * This function is called when we pick some image from the album 
    * */ 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

     if (requestCode == RESULT_SELECT_IMAGE && resultCode == RESULT_OK && data != null){ 
      //set the selected image to image variable 
      Uri image = data.getData(); 
      imageView.setImageURI(image); 

      //get the current timeStamp and strore that in the time Variable 
      Long tsLong = System.currentTimeMillis()/1000; 
      timestamp = tsLong.toString(); 

      Toast.makeText(getApplicationContext(),timestamp,Toast.LENGTH_SHORT).show(); 
     } 
    } 

    private String hashMapToUrl(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(); 
    } 


    //async task to upload image 
    private class Upload extends AsyncTask<Void,Void,String>{ 
     private Bitmap image; 
     private String name; 

     public Upload(Bitmap image,String name){ 
      this.image = image; 
      this.name = name; 
     } 

     @Override 
     protected String doInBackground(Void... params) { 
      ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 
      //compress the image to jpg format 
      image.compress(Bitmap.CompressFormat.JPEG,100,byteArrayOutputStream); 
      /* 
      * encode image to base64 so that it can be picked by saveImage.php file 
      * */ 
      String encodeImage = Base64.encodeToString(byteArrayOutputStream.toByteArray(),Base64.DEFAULT); 

      //generate hashMap to store encodedImage and the name 
      HashMap<String,String> detail = new HashMap<>(); 
      detail.put("name", name); 
      detail.put("image", encodeImage); 

      try{ 
       //convert this HashMap to encodedUrl to send to php file 
       String dataToSend = hashMapToUrl(detail); 
       //make a Http request and send data to saveImage.php file 
       String response = Request.post(SERVER,dataToSend); 

       //return the response 
       return response; 

      }catch (Exception e){ 
       e.printStackTrace(); 
       Log.e(TAG,"ERROR "+e); 
       return null; 
      } 
     } 



     @Override 
     protected void onPostExecute(String s) { 
      //show image uploaded 
      Toast.makeText(getApplicationContext(),"Image Uploaded",Toast.LENGTH_SHORT).show(); 
     } 
    } 
} 

感謝。

Answer 1

我認爲你只需要修復php文件。我在你的問題中編輯它，因爲它沒有意義。現在使用那裏的東西。

如果您需要更多的幫助，請給我們的

error_log(print_r($_POST, 1)); 

輸出從PHP日誌。