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没有问题发送上传图像android使用凌空但问题出现时，第一个图像上传我点击上传按钮相同的图像将再次上传甚至没有选择，但仍然发送以前的图像。如果选择的第一张图片上传，并选择其他图片上传没有问题。android studio图片上传仍然发送相同的图像，甚至没有选择
使用volley和mysingleton发送数据。
这是ImageUpload.java
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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 com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
public class ImageUpload extends AppCompatActivity implements View.OnClickListener{
private static final String IMAGE_DIRECTORY = "/demonuts";
private Button buttonUpload, buttonChoose;
private ImageView imageView;
private Bitmap bitmap;
private final int GALLERY = 1, CAMERA = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_upload);
imageView = (ImageView) findViewById(R.id.imageView);
buttonUpload = (Button) findViewById(R.id.buttonUpload);
buttonChoose = (Button) findViewById(R.id.buttonChoose);
buttonChoose.setOnClickListener(this);
buttonUpload.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.buttonChoose:
showPictureDialog();
break;
case R.id.buttonUpload:
uploadImage();
break;
}
}
private void showPictureDialog(){
AlertDialog.Builder pictureDialog = new AlertDialog.Builder(this);
pictureDialog.setTitle("Select Action");
String[] pictureDialogItems = {
"Select photo from gallery",
"Capture photo from camera" };
pictureDialog.setItems(pictureDialogItems,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
choosePhotoFromGallary();
break;
case 1:
takePhotoFromCamera();
break;
}
}
});
pictureDialog.show();
}
public void choosePhotoFromGallary() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, GALLERY);
}
private void takePhotoFromCamera() {
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == this.RESULT_CANCELED) {
return;
}
if (requestCode == GALLERY && resultCode == RESULT_OK) {
if (data != null) {
Uri path = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), path);
imageView.setImageBitmap(bitmap);
imageView.setVisibility(View.VISIBLE);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(ImageUpload.this, "Failed!", Toast.LENGTH_SHORT).show();
}
}
} else if (requestCode == CAMERA && resultCode == RESULT_OK) {
bitmap = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(bitmap);
saveImage(bitmap);
imageView.setVisibility(View.VISIBLE);
Toast.makeText(ImageUpload.this, "Image Saved!", Toast.LENGTH_SHORT).show();
}
}
public String saveImage(Bitmap myBitmap) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File wallpaperDirectory = new File(
Environment.getExternalStorageDirectory() + IMAGE_DIRECTORY);
// have the object build the directory structure, if needed.
if (!wallpaperDirectory.exists()) {
wallpaperDirectory.mkdirs();
}
try {
File f = new File(wallpaperDirectory, Calendar.getInstance()
.getTimeInMillis() + ".jpg");
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
MediaScannerConnection.scanFile(this,
new String[]{f.getPath()},
new String[]{"image/jpeg"}, null);
fo.close();
Log.d("TAG", "File Saved::--->" + f.getAbsolutePath());
return f.getAbsolutePath();
} catch (IOException e1) {
e1.printStackTrace();
}
return "";
}
private void uploadImage(){
StringRequest stringRequest = new StringRequest(Request.Method.POST,
Constants.URL_UPLOAD,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
String Response = jsonObject.getString("message");
Toast.makeText(ImageUpload.this,Response,Toast.LENGTH_LONG).show();
imageView.setImageResource(0);
imageView.setVisibility(View.GONE);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<>();
params.put("image",imageToString(bitmap));
return params;
}
};
MySingleton.getInstance(ImageUpload.this).addToRequestQueue(stringRequest);
}
private String imageToString(Bitmap bitmap){
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG,100,byteArrayOutputStream);
byte[] imgBytes = byteArrayOutputStream.toByteArray();
return Base64.encodeToString(imgBytes,Base64.DEFAULT);
}
}
这是PHP文件检索后的图像只是用于测试只使用随机名称。
$response = array();
$name = rand(1,10);
$uploadpath = "../upload/$name.jpg";
if($_SERVER['REQUEST_METHOD'] == 'POST'){
if(empty($_POST['image'])){
$response['error'] = true;
$response['message'] = "Please choose images";
}else{
$image = $_POST['image'];
file_put_contents($uploadpath, base64_decode($image));
$response['error'] = false;
$response['message'] = "Image upload succesfully";
}
}else{
$response['error'] = true;
$response['message'] = "Please choose images";
}
echo json_encode($response);