我正在从CodingInFlow频道观看youtube上的一系列视频。他们有点过时了，2017年已经很久了。 Video Series非常好，我跟进了第4个视频，没有问题，只不过其中一个已过时的功能很容易解决。 文件已上传到Firebase存储，但未显示在实时数据库中
Main Class
public class MainActivity extends AppCompatActivity {
private static final int PICK_IMAGE_REQUEST = 1;
Button mButtonChooseImage;
Button mButtonUpload;
TextView mTextViewShowUploads;
EditText mEditTextFileName;
ImageView mImageView;
ProgressBar mProgressBar;
Uri mImageUri;
StorageReference mStorageRef;
DatabaseReference mDatabaseRef;
StorageTask mUploadTask;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButtonChooseImage = findViewById(R.id.button_choose_image);
mButtonUpload = findViewById(R.id.button_upload);
mTextViewShowUploads = findViewById(R.id.text_view_show_uploads);
mEditTextFileName = findViewById(R.id.edit_text_file_name);
mImageView = findViewById(R.id.image_view);
mProgressBar = findViewById(R.id.progress_bar);
mStorageRef = FirebaseStorage.getInstance().getReference("uploads");
mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads");
mButtonChooseImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openFileChooser();
}
});
mButtonUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mUploadTask != null && mUploadTask.isInProgress()) {
Toast.makeText(MainActivity.this, "Upload in Progress", Toast.LENGTH_SHORT).show();
} else {
uploadFile();
}
}
});
mTextViewShowUploads.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
private void openFileChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, 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) {
mImageUri = data.getData();
Picasso.get().load(mImageUri).into(mImageView);
}
}
private String getFileExtension(Uri uri) {
ContentResolver cR = getContentResolver();
MimeTypeMap mime = MimeTypeMap.getSingleton();
return mime.getExtensionFromMimeType(cR.getType(uri));
}
private void uploadFile() {
if (mImageUri != null) {
StorageReference fileReference = mStorageRef.child(System.currentTimeMillis()
+ "." + getFileExtension(mImageUri));
mUploadTask = fileReference.putFile(mImageUri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
mProgressBar.setProgress(0);
}
}, 500);
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_SHORT).show();
Upload upload = new Upload(mEditTextFileName.getText().toString().trim(),
taskSnapshot.getStorage().getDownloadUrl().toString());
String uploadId = mDatabaseRef.push().getKey();
//assert uploadId != null;
mDatabaseRef.child(uploadId).setValue(upload);
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(@NonNull UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
mProgressBar.setProgress((int) progress);
}
});
} else {
Toast.makeText(this, "No file selected", Toast.LENGTH_SHORT).show();
}
}
}
我的问题是，我错过了什么（我完全按照视频并检查了频道网站上的代码）是我的错误，还是功能转移了并且需要添加一些东西？我问的原因是该应用程序可以在视频中使用，包括检查重复上传的功能，但是在我的复制中，该功能仅在图片实际上传时才起作用，因此有些变化，但是我没有甚至不知道从哪里开始研究，所以我从这里开始。
这就是我的方法。此代码将图像保存在子“个人资料图像”下的存储和Firebase实时数据库中，作为链接。
public class Registration3 extends AppCompatActivity {
Button elFin;
CircleImageView ProfileImage;
private DatabaseReference UsersRef;
private FirebaseAuth mAuth;
private StorageReference UserProfileImageRef;
String currentUserID;
final static int Gallery_Pick = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_registration3);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
elFin = findViewById(R.id.btn_dd);
ProfileImage = findViewById(R.id.profile_imageUp);
UsersRef = FirebaseDatabase.getInstance().getReference().child("DriversInformation").child(currentUserID);
UserProfileImageRef = FirebaseStorage.getInstance().getReference().child("profileimage");
ProfileImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent galleryIntent = new Intent();
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, Gallery_Pick);
}
});
elFin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Registration3.this, MainActivity.class);
startActivity(intent);
finish();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == Gallery_Pick && resultCode == RESULT_OK && data != null) {
Uri imageUri = data.getData();
CropImage.activity()
.setGuidelines(CropImageView.Guidelines.ON)
.setAspectRatio(1,1)
.start(this);
}
if(requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
{
CropImage.ActivityResult result = CropImage.getActivityResult(data);
if (resultCode == RESULT_OK) {
Uri resultUri = result.getUri();
StorageReference filePath = UserProfileImageRef.child(currentUserID + ".jpg");
filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if(task.isSuccessful()) {
Toast.makeText(Registration3.this, "Image Uplaoded", Toast.LENGTH_SHORT).show();
Task<Uri> result = task.getResult().getMetadata().getReference().getDownloadUrl();
result.addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
final String downloadUrl = uri.toString();
UsersRef.child("profileimage").setValue(downloadUrl)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
Intent selfIntent = new Intent(Registration3.this, Registration3.class);
startActivity(selfIntent);
Toast.makeText(Registration3.this, "Image Uploaded", Toast.LENGTH_SHORT).show();
} else {
String message = task.getException().getMessage();
Toast.makeText(Registration3.this, "Error: " + message, Toast.LENGTH_SHORT).show();
}
}
});
}
});
}
}
});
}
else {
Toast.makeText(Registration3.this, "Error: ", Toast.LENGTH_SHORT).show();
}
}
}
}