当我尝试上传图像并单击提交按钮时，logcat会显示此消息。
Logcat结果
2018-10-15 22:21:32.191 22289-22477/com.example.edward.neweventmanagementsystem E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.internal.api.FirebaseNoSignedInUserException: Please sign in before trying to get a token.
Java文件
package com.example.edward.neweventmanagementsystem;
import android.Manifest;
import android.app.DatePickerDialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import com.example.edward.neweventmanagementsystem.Model.EventInfo;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.OnProgressListener;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import java.util.Calendar;
import java.util.regex.Pattern;
import static android.widget.Toast.LENGTH_SHORT;
public class CreateEvent extends AppCompatActivity {
private static final String TAG = "activity_create_event";
private Uri filePath;
private TextView mDisplayDate;
private DatePickerDialog.OnDateSetListener mDateSetListener;
private DatabaseReference mDatabaseReference;
private Button mRegisterButton;
EditText mEventNameText, mContactNumText, mEventLocationText, mRegisterEventId;;
TextView mEventDate;
RadioGroup mEventType;
FirebaseStorage storage;
StorageReference storageRef,imageRef;
Uri uriImage ;//= Uri.parse("com.example.edward.eventmanagementsystem.ManageEvent/"+ R.drawable.ic_launcher_background);
public static final int PICK_IMAGE = 1;
ImageView mimageToUpload;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_event);
ActionBar actionBar = getSupportActionBar();
actionBar.hide();
FirebaseDatabase firebaseDatabase;
mDatabaseReference = FirebaseDatabase.getInstance().getReference().child("ListOfEvent"); //.push();
mRegisterButton = (Button)findViewById(R.id.btnRegisterEvent);
storage = FirebaseStorage.getInstance();
storageRef = storage.getReference();
mDisplayDate = (TextView) findViewById(R.id.RegisterEventStartDate);
mDisplayDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Calendar cal = Calendar.getInstance();
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH);
int day = cal.get(Calendar.DAY_OF_MONTH);
DatePickerDialog dialog = new DatePickerDialog(
CreateEvent.this,
android.R.style.Theme_Holo_Light_Dialog_MinWidth,
mDateSetListener,
year, month, day);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
dialog.show();
}
});
mDateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
month = month + 1;
Log.d(TAG, "onDateSet: date: mm/dd/yyyy: " + month + "/" + day + "/" + year);
String date = month + "/" + day + "/" + year;
mDisplayDate.setText(date);
}
};
//insert data to database
mRegisterEventId = (EditText) findViewById(R.id.RegisterEventId);
mEventNameText = (EditText) findViewById(R.id.RegisterEventName);
mContactNumText = (EditText) findViewById(R.id.RegisterContactNumber);
mEventDate = (TextView) findViewById(R.id.RegisterEventStartDate);
mEventType = (RadioGroup) findViewById(R.id.RegisterEventRadiogroup);
mEventLocationText = (EditText) findViewById(R.id.RegisterEventLocation);
mimageToUpload = (ImageView) findViewById(R.id.imageToUpload);
mRegisterButton = (Button) findViewById(R.id.btnRegisterEvent);
mimageToUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (ContextCompat.checkSelfPermission(CreateEvent.this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED){
selectPdf();
}
else {
ActivityCompat.requestPermissions(CreateEvent.this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},9);
}
}
});
mRegisterButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final ProgressDialog mDialog = new ProgressDialog(CreateEvent.this);
mDialog.setMessage("Please waiting...");
mDialog.show();
int selectedId = mEventType.getCheckedRadioButtonId();
final RadioButton radioButton = (RadioButton)findViewById(selectedId);
final String id = mRegisterEventId.getText().toString().trim();
final String name = mEventNameText.getText().toString().trim();
final String contact = mContactNumText.getText().toString().trim();
final String date = mEventDate.getText().toString().trim();
final String type = radioButton.getText().toString().trim();
final String location = mEventLocationText.getText().toString().trim();
if (TextUtils.isEmpty(id)) {
mRegisterEventId.setError("Enter Event ID!");
return;
}
if (TextUtils.isEmpty(name)) {
mEventNameText.setError("Enter Event Name!");
return;
}
if (TextUtils.isEmpty(location)) {
mEventLocationText.setError("Enter Location!");
return;
}
if (TextUtils.isEmpty(type)) {
radioButton.setError("Please select type of event type!");
return;
}
if(isValidPhone(contact)){
Toast.makeText(getApplicationContext(),"Phone number is valid",Toast.LENGTH_SHORT).show();
}else {
mContactNumText.setError("Phone number is not valid");
Toast.makeText(getApplicationContext(),"Phone number is not valid",Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(date)) {
mEventDate.setError("Please select event date!");
return;
}
mDatabaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.child(mRegisterEventId.getText().toString()).exists()) {
mDialog.dismiss();
Toast.makeText(CreateEvent.this, "ID already exists!", Toast.LENGTH_SHORT).show();
}else {
mDialog.dismiss();
EventInfo eventInfo = new EventInfo(mRegisterEventId.getText().toString().trim(),mEventNameText.getText().toString().trim(), mContactNumText.getText().toString().trim(), mEventDate.getText().toString().trim(), radioButton.getText().toString().trim(), mEventLocationText.getText().toString().trim());
mDatabaseReference.child(mRegisterEventId.getText().toString()).setValue(eventInfo);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
final String fileName = System.currentTimeMillis()+"";
if(uriImage != null) {
final StorageReference storageReference = storage.getReference();
System.out.println(uriImage);
storageReference.child("profileImageUrl").child(fileName).putFile(uriImage)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(final UploadTask.TaskSnapshot taskSnapshot) {
String url = taskSnapshot.getMetadata().getReference().getDownloadUrl().toString();
// Uri downloadUrl = taskSnapshot.getMetadata().getReference().getDownloadUrl().getResult();
// String urlImage = downloadUrl.toString();
mDatabaseReference.child(id).child("profileImageUrl").setValue(url).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()){
System.out.println(taskSnapshot.getUploadSessionUri().toString());
}
else{
Toast.makeText(getApplicationContext(),"File not Successfully Uploaded",LENGTH_SHORT).show(); }
}
});
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(getApplicationContext(),"File not Successfully Uploaded",LENGTH_SHORT).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
}
});
}else{
}
Toast.makeText(getApplicationContext(),"New event created successfully!",LENGTH_SHORT).show();
Intent ManageEventMenu = new Intent(CreateEvent.this, com.example.edward.neweventmanagementsystem.ManageEventMenu.class);
startActivity(ManageEventMenu);
}
});
}
public boolean isValidPhone(CharSequence phone) {
boolean check=false;
if(!Pattern.matches("[a-zA-Z]+", phone))
{
if(phone.length() < 10 || phone.length() > 11)
{
check = false;
}
else
{
check = true;
}
}
else
{
check=false;
}
return check;
}
private void selectPdf() {
Intent photoPickerIntent = new Intent();
photoPickerIntent .setType("image/*");
photoPickerIntent .setAction(Intent.ACTION_OPEN_DOCUMENT);
startActivityForResult(photoPickerIntent ,86);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 86 && resultCode == RESULT_OK && data != null){
final Uri imageUri = data.getData();
uriImage = imageUri;
mimageToUpload.setImageURI(uriImage);
}
else {
Toast.makeText(getApplicationContext(),"Please select file", LENGTH_SHORT).show();
}
}
}
任何人都知道如何解决此问题。非常感谢。 另外，当尝试在我的应用程序中显示消息时，我也遇到问题。其他字段没有问题，例如“文本”，“单选按钮”，“日期”，只有照片，但我无法上传真实网址。
菲。目前，firebase数据库中的url显示是照片存储位置答案 0 :(得分：1)
似乎用户未签名（已从Firebase认证）。 他们是解决问题的两种方法 1）使用身份验证对用户进行身份验证 2）将您的规则设置为基于火的实时数据库
将此规则复制并粘贴到Firebase实时数据库>规则
{
"rules": {
".read": true,
".write": true
}
}
但是这样做将使 您的安全规则被定义为公共规则，因此任何人都可以窃取，修改或删除数据库中的数据
答案 1 :(得分：0)
该异常清楚地表明您试图在没有用户登录的情况下执行操作。
您可以按照此手册进行身份验证，然后执行操作