Android：無法將值插入數據庫

Question

我想將我的phpMyAdmin數據庫中視頻的路徑及其縮略圖插入爲字符串。問題是這些值沒有存儲在我的數據庫中，我不斷收到「成功」：「0」，「消息」：「缺少必需的字段」。你有什麼想法，爲什麼發生這種情況？

這裏是我的代碼使用

安卓：

public class UploadActivity extends Activity { 
     // LogCat tag 
     private static final String TAG = MainActivity.class.getSimpleName(); 
     InputStream is =null; 
     private ProgressBar progressBar; 
     private String filePath = null; 
     public String serverPath; 
     private TextView txtPercentage; 
     SQLiteDatabase db; 
     private VideoView vidPreview; 
     private Button btnUpload; 
     long totalSize = 0; 
     String thumb2string; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_upload); 
      txtPercentage = (TextView) findViewById(R.id.txtPercentage); 
      btnUpload = (Button) findViewById(R.id.btnUpload); 
      progressBar = (ProgressBar) findViewById(R.id.progressBar); 

      vidPreview = (VideoView) findViewById(R.id.videoPreview); 
      // Receiving the data from previous activity 
      Intent i = getIntent(); 

      // video path that is captured in previous activity 
      filePath = i.getStringExtra("filePath"); 
      serverPath = i.getStringExtra("serverPath"); 


      if (filePath != null) { 
       // Displaying video on the screen 
       previewMedia(); 
      } else { 
       Toast.makeText(getApplicationContext(), 
         "Sorry, file path is missing!", Toast.LENGTH_LONG).show(); 
      } 

      btnUpload.setOnClickListener(new View.OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        // uploading the file to server 
        new UploadFileToServer().execute(); 
       } 
      }); 

     } 

     /** 
     * Displaying captured image/video on the screen 
     * */ 
     private void previewMedia() { 


       vidPreview.setVisibility(View.VISIBLE); 
       vidPreview.setVideoPath(filePath); 

       // start playing 
       vidPreview.start(); 

     } 

     /** 
     * Uploading the file to server 
     * */ 
     public class UploadFileToServer extends AsyncTask<Void, Integer, String> { 
      @Override 
      protected void onPreExecute() { 
       // setting progress bar to zero 
       progressBar.setProgress(0); 
       super.onPreExecute(); 
      } 

      @Override 
      protected void onProgressUpdate(Integer... progress) { 
       // Making progress bar visible 
       progressBar.setVisibility(View.VISIBLE); 

       // updating progress bar value 
       progressBar.setProgress(progress[0]); 

       // updating percentage value 
       txtPercentage.setText(String.valueOf(progress[0]) + "%"); 
      } 

      @Override 
      protected String doInBackground(Void... params) { 
       return uploadFile(); 
      } 

      @SuppressWarnings("deprecation") 
      public String uploadFile() { 
       String responseString = null; 

       HttpClient httpclient = new DefaultHttpClient(); 
       HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL); 

       try { 

        AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
          new AndroidMultiPartEntity.ProgressListener() { 

           @Override 
           public void transferred(long num) { 
            publishProgress((int) ((num/(float) totalSize) * 100)); 
           } 
          }); 
        File sourceFile = new File(filePath); 

        // Adding file data to http body 
        entity.addPart("video", 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 
         Bitmap thumb = ThumbnailUtils.createVideoThumbnail(filePath, 
           MediaStore.Images.Thumbnails.MINI_KIND); 
         ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
         thumb.compress(Bitmap.CompressFormat.JPEG, 100, stream); 
         byte[] thumbnailBitmapBytes = stream.toByteArray(); 
         thumb2string = new String(thumbnailBitmapBytes); 
         /*db=openOrCreateDatabase("TwentyThree", Context.MODE_PRIVATE, null); 

         SQLiteStatement stmt = db.compileStatement("INSERT INTO videos (path, thumbnail) values (?, ?)"); 
         stmt.bindString(1, serverPath); 
         stmt.bindBlob(2, thumbnailBitmapBytes); 
         stmt.executeInsert();*/ 
         insertInto(); 

         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; 

      } 

      private void insertInto() throws IOException { 
       List<NameValuePair> params = new ArrayList<NameValuePair>(); 

       params.add(new BasicNameValuePair("Path", "serverPath")); 
       params.add(new BasicNameValuePair("Thumbnail", "thumb2string")); 

       try{ 
        HttpClient httpClient = new DefaultHttpClient(); 
        HttpPost httpPost = new HttpPost("http://192.168.1.96:80/DBscripts/insertdb.php"); 
        httpPost.setEntity(new UrlEncodedFormEntity(params)); 
        HttpResponse response = httpClient.execute(httpPost); 
        HttpEntity entity = response.getEntity(); 

        is = entity.getContent(); 
       }catch(ClientProtocolException e){ 
        Log.e("ClientProtocol", "Log_tag"); 
        e.printStackTrace(); 
       } 
      } 

      @Override 
      protected void onPostExecute(String result) { 
       Log.e(TAG, "Response from server: " + result); 

       // showing the server response in an alert dialog 
       showAlert(result); 

       super.onPostExecute(result); 
      } 

     } 

     /** 
     * Method to show alert dialog 
     * */ 
     private void showAlert(String message) { 
      AlertDialog.Builder builder = new AlertDialog.Builder(this); 
      builder.setMessage(message).setTitle("Response from Servers") 
        .setCancelable(false) 
        .setPositiveButton("OK", new DialogInterface.OnClickListener() { 
         public void onClick(DialogInterface dialog, int id) { 
          UploadActivity.this.finish(); 
         } 
        }); 
      AlertDialog alert = builder.create(); 
      alert.show(); 
     } 

    } 

PHP腳本：

<?php 

$con = mysqli_connect('127.0.0.1','root','pswd'); 
mysqli_select_db($con,"twentythree"); 

if (isset($_POST['Path']) && isset($_POST['Thumbnail'])) { 
$path =$_POST['Path']; 
$thumb =$_POST['Thumbnail']; 

$query = "INSERT INTO videos(Path, Thumbnail) VALUES('".$path."','".$thumb."')"; 
// mysql inserting a new row 
mysqli_query($con,$query); 


}else{ 
// required field is missing 
    $response["success"] = 0; 
    $response["message"] = "Required field(s) is missing"; 

    // echoing JSON response 
    echo json_encode($response); 

} 
?> 

Answer 1

我設法找到解決方案。問題出在我用來將字節數組編碼爲字符串的方式。所以，而不是使用thumb2string = new String(thumbnailBitmapBytes);我使用Base64編碼：thumb2string = Base64.encodeToString(thumbnailBitmapBytes, Base64.DEFAULT);