我正在尝试使用 Volley 发布我的数据，但是我无法在服务器上上传我的图像。总是得到http:\\www.mybaseurl.com/upload.php的意外响应代码500之类的错误。
以下是我试图上传的代码
public String getStringImage(Bitmap bmp){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
return encodedImage;
}
private void uploadImage(){
//Showing the progress dialog
final ProgressDialog loading = ProgressDialog.show(this,"Uploading...","Please wait...",false,false);
StringRequest stringRequest = new StringRequest(Request.Method.POST, UPLOAD_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String s) {
//Disimissing the progress dialog
loading.dismiss();
//Showing toast message of the response
Toast.makeText(MainActivity.this, s , Toast.LENGTH_LONG).show();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
//Dismissing the progress dialog
loading.dismiss();
//Showing toast
Toast.makeText(MainActivity.this, ""+volleyError, Toast.LENGTH_LONG).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
//Converting Bitmap to String
String image = getStringImage(bitmap);
//Getting Image Name
String name = editTextName.getText().toString().trim();
//Creating parameters
Map<String,String> params = new Hashtable<String, String>()
params.put("empsno", "81");
params.put("storesno", "165");
params.put("lrSno", "1808");
params.put("recQty", "0");
params.put("recVol", "0");
params.put("recWgt", "0");
params.put("damageQty", "0");
params.put("looseQty", "0");
params.put("deliveryDate", "2016-09-24");
params.put("deliveryTime", "10:15");
params.put("uploadFile", image);
params.put("remarks", "mytestingrem");
params.put("receivedBy", "amankumar");
params.put("ipAddress", "12.65.65.32");
//returning parameters
return params;
}
};
//Creating a Request Queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(stringRequest);
}
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, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri filePath = data.getData();
try {
//Getting the Bitmap from Gallery
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
//Setting the Bitmap to ImageView
imageView.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void onClick(View v) {
if(v == buttonChoose){
showFileChooser();
}
if(v == buttonUpload){
uploadImage();
}
}
请帮帮我，如何使用这些参数上传文件。我是凌空抽射的新手。我只是从https://www.simplifiedcoding.net/android-volley-tutorial-to-upload-image-to-server复制粘贴此代码。即使我不知道我是否正确使用。
提前致谢
答案 0 :(得分：6)
你可以尝试这种方法，它实际上适用于ma项目。首先你必须从图库中选择图像，然后它必须转换为字符串并通过齐射发送到服务器
// initialize
private int PICK_IMAGE_REQUEST = 1;
//set click listener
Upload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//method to upload the image
showFileChooser();
}
});
打开图库并选择图像的方法
private void showFileChooser() {
Intent pickImageIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
pickImageIntent.setType("image/*");
pickImageIntent.putExtra("aspectX", 1);
pickImageIntent.putExtra("aspectY", 1);
pickImageIntent.putExtra("scale", true);
pickImageIntent.putExtra("outputFormat",
Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(pickImageIntent, PICK_IMAGE_REQUEST);
}
添加此方法。这里的图像实际上已发送到服务器。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri filePath = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
Bitmap lastBitmap = null;
lastBitmap = bitmap;
//encoding image to string
String image = getStringImage(lastBitmap);
Log.d("image",image);
//passing the image to volley
SendImage(image)
} catch (IOException e) {
e.printStackTrace();
}
}
}
将图像编码为字符串
的方法 public String getStringImage(Bitmap bmp) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
return encodedImage;
}
使用排球上传
private void SendImage( final String image) {
final StringRequest stringRequest = new StringRequest(Request.Method.POST, "URL",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d("uploade",response);
try {
JSONObject jsonObject = new JSONObject(response);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(Edit_Profile.this, "No internet connection", Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new Hashtable<String, String>();
params.put("image", image);
return params;
}
};
{
int socketTimeout = 30000;
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
stringRequest.setRetryPolicy(policy);
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
}
答案 1 :(得分：4)
您应该了解使用排球库和图片上传的概念。以下是图像上传和使用排球库的一些其他有用链接。
注意：我还测试过你的tutorial.code没问题。请正确检查您的图像路径。如果可能，那么在任何托管的Web服务器上使用他们的PHP代码并检查他们的json响应并交叉检查您通过服务器脚本的参数传递的参数..