基本上，用户应该能够从其画廊/相册中选择一个图像，然后为其命名，然后再将其上传到服务器。我可以选择图像并命名，但是每次尝试上传时，都会收到“上传过程中文件上传错误”通知。
公共类MainActivity扩展了AppCompatActivity实现的View.OnClickListener {
private Button buttonChoose;
private Button buttonUpload;
private ImageView imageView;
private EditText editText;
private static final int STORAGE_PERMISSION_CODE = 2342;
private static final int PICK_IMAGE_REQUEST = 22;
private Uri filePath;
private Bitmap bitmap;
private static final String UPLOAD_URL = "http://192.168.15.132/C:/Users/Keymas/Desktop/ScanPics";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonUpload = findViewById(R.id.buttonUpload);
buttonChoose = findViewById(R.id.buttonChoose);
imageView = findViewById(R.id.imageView);
editText = findViewById(R.id.editTextName);
buttonChoose.setOnClickListener(this);
buttonUpload.setOnClickListener(this);
requestStoragePermission();
}
private void requestStoragePermission(){
if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)
return;
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode == STORAGE_PERMISSION_CODE){
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(this, "Permission granted", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this, "Permission denied", Toast.LENGTH_LONG).show();
}
}
}
private void showFileChooser(){
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null){
filePath = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(),filePath);
imageView.setImageBitmap(bitmap);
}catch (IOException e){
}
}
}
private String getPath(Uri uri){
Cursor cursor = getContentResolver().query(uri, null,null,null,null);
cursor.moveToFirst();
String document_id = cursor.getString(0);
document_id = document_id.substring(document_id.lastIndexOf(":")+1);
cursor.close();
cursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Images.Media._ID + " = ? ",
new String[]{document_id}, null);
cursor.moveToFirst();
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
cursor.close();
return path;
}
private void uploadImage(){
String name = editText.getText().toString().trim();
String path = getPath(filePath);
try{
String uploadid = UUID.randomUUID().toString();
new MultipartUploadRequest(this, uploadid, UPLOAD_URL).addFileToUpload(path, "image").
addParameter("name", name).setNotificationConfig((new UploadNotificationConfig())).setMaxRetries(2)
.startUpload();
}catch (Exception e){
}
}
@Override
public void onClick(View view) {
if ( view == buttonUpload){
uploadImage();
}
if(view == buttonChoose){
showFileChooser();
}
}
}