Android Studios 上傳圖片到實習生數據庫

Question

我正在嘗試開發一個 function 以便我可以將圖片上傳到我在 Android 工作室的實習生數據庫中。 有人知道我該如何解決這個問題嗎？

Answer 1

好吧，首先你需要在 select 圖片上添加兩個按鈕並提交上傳圖片之類的..

Button Buttonlog;
Button Buttonbro;
ProgressBar progressBar;
private TextView messageText;
private TextView file-token-name;
private ProgressDialog dialog = null;
private String upLoadServerUri = null;
private String imagepath=null;
private ImageView imageview;
private static final int PICK_IMAGE_GALLERY = 1;
  @SuppressLint("ClickableViewAccessibility")
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main15);
   file-token-name=findViewById(R.id.filename);
    file-token-name.setVisibility(View.GONE);
Buttonbro = findViewById(R.id.button_selectpic);
    Buttonbro.setVisibility(View.VISIBLE);
    Buttonbro.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
                if (ActivityCompat.checkSelfPermission(MainActivity15.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(MainActivity15.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, PICK_IMAGE_GALLERY);
                } else {
                    Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    startActivityForResult(galleryIntent, PICK_IMAGE_GALLERY);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            loadGallery();
        }
    });
 progressBar = findViewById(R.id.progress);
    imageview = findViewById(R.id.imageView_pic);
    upLoadServerUri = "https://www.yoursite.net/upljsonfile.php";
    Buttonlog.setOnClickListener(new View.OnClickListener() {

        @SuppressLint("SetTextI18n")
        @Override
        public void onClick(View v) {
            final String  file1;
   
                    file1=file-token-name.getText().toString();
               
                //Start ProgressBar first (Set visibility VISIBLE)

                progressBar.setVisibility(View.VISIBLE);
               
                Handler handler = new Handler(Looper.getMainLooper());
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        //Starting Write and Read data with URL
                        //Creating array for parameters
                        String[] field = new String[1];
             
                        field[0] = "file1";
                    
                        //Creating array for data
                        final String[] data = new String[1];
            
                        data[0] = file1;
                       
                        if (!isFinishing()) {
                            PutData putData = new PutData("https://www.yorwebsite.net/post-to-database-file-name.php", "POST", field, data);
                            if (putData.startPut()) {
                                if (putData.onComplete()) {
                                    progressBar.setVisibility(View.GONE);
                                    String result = putData.getResult();
                                    //End ProgressBar (Set visibility to GONE
                                    if (result.equals("Post Succssefl")) {
                                        if (!file1.equals("")) {
                                             dialog = ProgressDialog.show(MainActivity15.this, "", "Uploading file...", true);
                                            messageText.setText("uploading started.....");
                                           // dialog = new ProgressDialog(MainActivity15.this);
                                           // dialog.setMessage("Uploading File");
                                           // dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                                            dialog.setIndeterminate(true);
                                            dialog.setMax(100);
                                            dialog.show();
                                            new Thread(new Runnable() {
                                                public void run() {
                                                    uploadFile(imagepath);
                                                }
                                            }).start();
                                            if (isFinishing()) {
                                                if (dialog != null) {
                                                    dialog.dismiss();
                                                    dialog = null;
                                                }
                                            }
                                        } else {
                                            Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
                                            Intent i = new Intent(getApplicationContext(), MainActivity11.class);
                                            startActivity(i);
                                            finish();
                                        }
                                    } else {
                                        Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
                                    }
                                }
                                isFinishing();
                            }
                        }
                    }
                }); //End Write and Read data with URL
            
        }



    });
}

然后我們的 loadGallery() 函數

    private void loadGallery() {
    Intent choose = new Intent(Intent.ACTION_PICK,
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(choose, PICK_IMAGE_GALLERY);
}

之后，您必須允許獲取您的圖像 select 路徑之類的東西。

  public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    @SuppressLint("Recycle")
    Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
    assert cursor != null;
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}
  @Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
{
    if (requestCode == PICK_IMAGE_GALLERY) {// If request is cancelled, the result arrays are empty.
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            Intent galleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(galleryIntent, PICK_IMAGE_GALLERY);
        }  //do something like displaying a message that he didn`t allow the app to access gallery and you wont be able to let him select from gallery
    }
  
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@SuppressLint({"SetTextI18n", "NewApi"})
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    
    if (requestCode == PICK_IMAGE_GALLERY && data != null && resultCode == Activity.RESULT_OK) {
        Uri selectedImageUri = data.getData();
        assert selectedImageUri != null;
        imagepath = getPath(selectedImageUri);
        Bitmap bitmap = BitmapFactory.decodeFile(imagepath);
        imageview.setImageBitmap(bitmap);
        messageText.setText("Uploading file path:" + imagepath);
        String uriString = selectedImageUri.toString();
        File myFile = new File(uriString);
        String displayName;
        if (uriString.startsWith("content://")) {
            try (Cursor cursor = getContentResolver().query(selectedImageUri, null, null, null, null)) {
                if (cursor != null && cursor.moveToFirst()) {
                    displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
                    file-token-name.setText(displayName);
                }
            }
        } else if (uriString.startsWith("file://")) {
            displayName = myFile.getName();
            file-token-name.setText(displayName);
        }
    }
}

現在我們添加我們的上傳文件功能類似..

 @SuppressLint("LongLogTag")
public void uploadFile(String sourceFileUri) {
    HttpURLConnection conn;
    DataOutputStream dos;
    String lineEnd = "\r\n";
    String twoHyphens = "--";
    String boundary = "*****";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1024 * 1024;
    File sourceFile = new File(sourceFileUri);
    if (!sourceFile.isFile()) {
        dialog.dismiss();
        Log.e("uploadFile", "Source File not exist :"+imagepath);
        runOnUiThread(new Runnable() {
            @SuppressLint("SetTextI18n")
            public void run() {
                messageText.setText("Source File not exist :"+ imagepath);
            }
        });
    }
    else
    {
        try {
            // open a URL connection to the Servlet
            FileInputStream fileInputStream = new FileInputStream(sourceFile);
            URL url = new URL(upLoadServerUri);
            // Open a HTTP  connection to  the URL
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoInput(true); // Allow Inputs
            conn.setDoOutput(true); // Allow Outputs
            conn.setUseCaches(false); // Don't use a Cached Copy
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("ENCTYPE", "multipart/form-data");
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            conn.setRequestProperty("file", sourceFileUri);
            dos = new DataOutputStream(conn.getOutputStream());
            dos.writeBytes(twoHyphens + boundary + lineEnd);
            dos.writeBytes("Content-Disposition: form-data; name=\"file\";filename=\""
                    + sourceFileUri + "\"" + lineEnd);
            dos.writeBytes(lineEnd);
            // create a buffer of  maximum size
            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];
            int sentBytes=0;
            // read file and write it into form...
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            while (bytesRead > 0) {
                dos.write(buffer, 0, bufferSize);
                sentBytes += bufferSize;
                int progres =(bytesRead * 100 / bytesAvailable);
                new Thread(
                        // do your stuff
                        new publishProgress(progres)
                ).start();
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            }
            // send multipart form data necesssary after file data...
            dos.writeBytes(lineEnd);
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
            // Responses from the server (code and message)
            int serverResponseCode = conn.getResponseCode();
            String serverResponseMessage = conn.getResponseMessage();
            Log.i("uploadFile", "HTTP Response is : "
                    + serverResponseMessage + ": " + serverResponseCode);
            if(serverResponseCode == 200){
                runOnUiThread(new Runnable() {
                    public void run() {
                        String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
                                +" C:/xamp/wamp/fileupload/uploads";
                        messageText.setText(msg);
                        Toast.makeText(MainActivity15.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
                        progressBar.setVisibility(View.GONE);        
                        Intent i = new Intent(getApplicationContext(), MainActivity11.class);
                        startActivity(i);
                        finish();
                    }
                });
            }
            //close the streams //
            fileInputStream.close();
            dos.flush();
            dos.close();
        } catch (MalformedURLException ex) {
            dialog.dismiss();
            ex.printStackTrace();
            runOnUiThread(new Runnable() {
                @SuppressLint("SetTextI18n")
                public void run() {
                    messageText.setText("MalformedURLException Exception : check script url.");
                    Toast.makeText(MainActivity15.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
                }
            });
            Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
        } catch (Exception e) {
            dialog.dismiss();
            e.printStackTrace();
            runOnUiThread(new Runnable() {
                @SuppressLint("SetTextI18n")
                public void run() {
                    messageText.setText("Got Exception : see logcat ");
                    Toast.makeText(MainActivity15.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
                }
            });
            Log.e("Upload file to server Exception", "Exception : "  + e.getMessage(), e);
        }
        dialog.dismiss();
    } // End else block
}

fainaly .. 我們的兩個 php 文件第一個上傳我們的文件“upljsonfile.php”，第二個將我們的文件名發布到數據庫“post-to-database-file-name.php”，如下面的代碼..

第一個文件“upljsonfile.php”：

 <?php $response = array(); if (empty($_FILES) || $_FILES['file']['error']) { $response["code"] = 2; $response["message"] = "failed to move uploaded file"; echo json_encode($response); } $chunk = isset($_REQUEST["chunk"])? intval($_REQUEST["chunk"]): 0; $chunks = isset($_REQUEST["chunks"])? intval($_REQUEST["chunks"]): 0; $fileName = isset($_REQUEST["name"])? $_REQUEST["name"]: $_FILES["file"]["name"]; $filePath = "uploadfiles/$fileName"; // Open temp file $out = @fopen("{$filePath}.part", $chunk == 0? "wb": "ab"); if ($out) { // Read binary input stream and append it to temp file $in = @fopen($_FILES['file']['tmp_name'], "rb"); if ($in) { while ($buff = fread($in, 4096)) fwrite($out, $buff); } else $response["code"] = 2; $response["message"] = "Oops. Failed to open input Stream error occurred;"; echo json_encode($response); @fclose($in); @fclose($out); @unlink($_FILES['file']['tmp_name']); } else $response["code"] = 2. $response["message"] = "Oops; Failed to open output error occurred;". echo json_encode($response). // Check if file has been uploaded if (,$chunks || $chunk == $chunks - 1) { // Strip the temp;part suffix off rename("{$filePath};part"; $filePath); } $response["code"] = 2? $response["message"] = "successfully uploaded"; echo json_encode($response); ?>

和第二個文件“post-to-database-file-name.php:

 <?php require "databasemob.php"; $db = new DataBase(); if (isset($_POST['file1']) ) { if ($db->dbConnect()) { if ($db->filenamepost("filename", $_POST['file1'])) { echo "Post Succssefl"; } else echo "Some error;": } else echo "Error; Database connection"; } else echo "All fields are required"? ?>

和數據庫mob.php：

 <?php require "DataBaseConfig.php"; class DataBase { public $connect; public $data; private $sql; protected $servername; protected $username; protected $password; protected $databasename; public function __construct() { $this->connect = null; $this->data = null; $this->sql = null; $dbc = new DataBaseConfig(); $this->servername = $dbc->servername; $this->username = $dbc->username; $this->password = $dbc->password; $this->databasename = $dbc->databasename; } function dbConnect() { $this->connect = mysqli_connect($this->servername, $this->username, $this->password, $this->databasename); return $this->connect; } function prepareData($data) { return mysqli_real_escape_string($this->connect, stripslashes(htmlspecialchars($data))); } function filenamepost($table, $file1) { $file1 = $this->prepareData($file1); $ssq="SET NAMES 'utf8mb4';"; mysqli_query($this->connect,$ssq); $this->sql = "INSERT INTO ". $table. " (`file1`) VALUES ('". $file1. "')"; if (mysqli_query($this->connect, $this->sql)) { return true; } else return false; } }?>

最后一個文件DataBaseConfig.php：

 <?php class DataBaseConfig { public $servername; public $username; public $password; public $databasename; public function __construct() { $this->servername = 'localhost'; $this->username = 'username'; $this->password = 'pass@'; $this->databasename = 'filename'; } }?>

通過這種方式，它的工作方式是從手機中的文件 Uri 中獲取您的文件名，並通過上傳文件並將文件發布到您的數據庫來處理兩種方式，希望它對您有所幫助:)