我目前正在使用“事件报告”应用程序，该应用程序允许用户选择和上传图像。
我已经成功地将图像发布到Firebase Storage，但是我想知道Firebase数据库中是否可以有一个链接/ URL，我可以单击该链接/ URL以将我重定向到Firebase Storage以查看该图像。
我想要此功能，以便最终用户能够连同标题，日期，备注等用户输入一起看到带有链接的“图像”子项和其他输入
我曾尝试在StackOverflow和Youtube上搜索答案，但其中大多数都已过时并且看起来已经过时。有一个命令“ getDownloadUrl”，但我认为它已被弃用。
这是我班上的代码，它将我的图像上传到Firebase存储
private void uploadImage() {
if (filePath != null) {
final ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setTitle("Uploading...");
progressDialog.show();
StorageReference ref = storageReference.child("images/"+ UUID.randomUUID().toString());
ref.putFile(filePath)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
progressDialog.dismiss();
Toast.makeText(getActivity(),"Uploaded", Toast.LENGTH_SHORT).show();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
progressDialog.dismiss();
Toast.makeText(getActivity(),"Failed"+e.getMessage(), Toast.LENGTH_SHORT).show();
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0*taskSnapshot.getBytesTransferred()/taskSnapshot.getTotalByteCount());
progressDialog.setMessage("Uploaded"+(int)progress+"%");
}
});
}
}
private void chooseImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"),PICK_IMAGE_REQUEST);
}
ReportFragment
import static android.app.Activity.RESULT_OK;
import static com.firebase.ui.auth.AuthUI.getApplicationContext;
public class ReportFragment extends Fragment implements
AdapterView.OnItemSelectedListener{
private Button btnChoose,btnUpload;
private ImageView imageView;
private Uri filePath;
private final int PICK_IMAGE_REQUEST = 71;
private TextView mDisplayDate;
private DatePickerDialog.OnDateSetListener mDateSetListener;
private EditText reportedBy;
private TextView date; //upstairs declare alr as mDisplayDate
private Spinner spinner; //downstairs declare alr as spinner3
private EditText location;
private Spinner spinner2; //downstairs declare alr as spinner2
private EditText details;
private Spinner spinner3; //downstairs declare alr as spinner1
private EditText remarks;
private EditText title;
private Button submitIncident;
public static TextView resultTextView3;
Button scan_btn3;
private ImageView imageView2;
private TextView imgUrl1;
DatabaseReference databaseIncidents;
FirebaseStorage storage;
StorageReference storageReference;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable
ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_report, container, false);
databaseIncidents =
FirebaseDatabase.getInstance().getReference("Incidents");
storage = FirebaseStorage.getInstance();
storageReference = storage.getReference();
btnChoose = (Button) v.findViewById(R.id.btnChoose);
btnUpload = (Button) v.findViewById(R.id.btnUpload);
imageView = (ImageView) v.findViewById(R.id.imgView);
reportedBy = (EditText) v.findViewById(R.id.etreportedby);
// Below have already line 151
// date = (TextView) v.findViewById(R.id.tvdate);
location = (EditText) v.findViewById(R.id.etlocation);
details = (EditText) v.findViewById(R.id.etdetails);
remarks = (EditText) v.findViewById(R.id.etremarks);
title = (EditText) v.findViewById(R.id.ettitle);
submitIncident = (Button) v.findViewById(R.id.btnSubmit);
resultTextView3 = (TextView)v.findViewById(R.id.result_text3);
scan_btn3 = (Button)v.findViewById(R.id.btn_scan3);
imageView2 = (ImageView)v.findViewById(R.id.ivimagescardinput);
imgUrl1 = (TextView)v.findViewById(R.id.tvimagescard);
btnChoose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
chooseImage();
}
});
// btnUpload.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// uploadImage();
// }
// });
scan_btn3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new
Intent(getActivity(),ScanCodeActivity.class));
}
});
submitIncident.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
incidentSubmit();
uploadImage();
Glide.with(getActivity()).load(URL).into(imageView2);
}
});
return`
}
private void incidentSubmit(){
String reportedname = reportedBy.getText().toString().trim();
String location1 = location.getText().toString();
String details1 = details.getText().toString();
String remarks1 = remarks.getText().toString();
String urgency1 = spinner.getSelectedItem().toString();
String type1 = spinner2.getSelectedItem().toString();
String splocation1 = spinner3.getSelectedItem().toString();
String date1 = mDisplayDate.getText().toString();
String title1 = title.getText().toString();
String qrlocation1 = resultTextView3.getText().toString();
String image1 = imgUrl1.getText().toString();
if(!TextUtils.isEmpty(reportedname)) {
String incidentId = databaseIncidents.push().getKey();
Incident incident = new
Incident(reportedname,location1,details1,remarks1,urgency1,type1,splocation1,date1,title1,qrlocation1,image1);
databaseIncidents.child(incidentId).setValue(incident);
Toast.makeText(getActivity(), "Incident Added", Toast.LENGTH_LONG).show();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, new IncmanFragment());
fragmentTransaction.commit();
} else {
Toast.makeText(getActivity(), "All fields must be entered",Toast.LENGTH_LONG).show();
}
}
private void uploadImage() {
if (filePath != null) {
final StorageReference ref = storageReference.child("images/"+ UUID.randomUUID().toString());
ref.putFile(filePath).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if(task.isSuccessful()) {
ref.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
String URL = uri.toString();
databaseIncidents.child("imageId").setValue(URL.toString());
}
});
}
}
});
}
}
private void chooseImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"),PICK_IMAGE_REQUEST);
}
@Override
public 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) {
filePath = data.getData();
try{
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getApplicationContext().getContentResolver(),filePath);
imageView.setImageBitmap(bitmap);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String text = parent.getItemAtPosition(position).toString();
Toast.makeText(parent.getContext(), text, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
非常感谢任何帮助或教程！
答案 0 :(得分：0)
要将图像存储到Firebase存储中，首先要设置正确的引用，然后将图像存储在其中，这与Firebase数据库数据存储非常相似。
要在Firebase数据库中具有链接，您只需使用downloadUri即可从存储中获取并将其存储在数据库中。
此代码看起来像这样，您可以从中获得启发，并提供更适合您的代码：
private void uploadFile(Bitmap bitmap) {
FirebaseStorage storage = FirebaseStorage.getInstance();
final StorageReference storageRef = storage.getReference();
final StorageReference ImagesRef = storageRef.child("images/"+mAu.getCurrentUser().getUid()+".jpg");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 20, baos);
byte[] data = baos.toByteArray();
final UploadTask uploadTask = ImagesRef.putBytes(data);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
Log.i("whatTheFuck:",exception.toString());
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onSuccess(final UploadTask.TaskSnapshot taskSnapshot) {
// taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
@Override
public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) {
if (!task.isSuccessful()) {
Log.i("problem", task.getException().toString());
}
return ImagesRef.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUri = task.getResult();
DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("users").child(mAu.getCurrentUser().getUid());
Log.i("seeThisUri", downloadUri.toString());// This is the one you should store
ref.child("imageURL").setValue(downloadUri.toString());
} else {
Log.i("wentWrong","downloadUri failure");
}
}
});
}
});
}
答案 1 :(得分：0)
如果我理解正确，则可以成功将图像上传到存储设备，但是在获取该图像直接URL时遇到了麻烦。
尝试以下代码：
StorageReference storageRef=FirebaseStorage.getInstance().getReference().child("images/"+ UUID.randomUUID().toString());
storageRef.putFile(filePath).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if(task.isSuccessful()){
storageRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
String URL = uri.toString();
//This is your image url do whatever you want with it.
}
});
}
}
});