java - 在android studio中上传图像后如何将图像URL插入firestore数据库?
问题描述
我在我的应用程序中创建了上传图片功能。图像上传并显示给用户,成功后返回“上传”。
现在,当用户关闭应用程序并再次打开时,它不会显示图像,因为它没有存储在 profileImage 字段中他唯一的数据库文件中。
我将图像存储在存储数据存储中。
我想将存储在存储中的相同图像 url 存储在数据库的当前用户字段中。
但是我编写的代码仍然没有插入所需的图像 url 值。
到目前为止,这是我的代码:
FirebaseFirestore fStore;
FirebaseStorage storage;
StorageReference storageReference;
FirebaseAuth fAuth;
String UID;
private Uri filePath;
private final int PICK_IMAGE_REQUEST = 71;
fAuth = FirebaseAuth.getInstance();
fStore = FirebaseFirestore.getInstance();
storage = FirebaseStorage.getInstance();
storageReference = storage.getReference();
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
userImage = findViewById(R.id.profile_userImg);
userImage.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
@Override
public void onClick(View view) {
chooseImage();
}
});
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
private void chooseImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Choose a Profile Image"), PICK_IMAGE_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @androidx.annotation.Nullable 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(getContentResolver(), filePath);
userImage.setImageBitmap(bitmap);
if (filePath != null) {
StorageReference ref = storageReference.child("Users Profile/" + UUID.randomUUID().toString());
ref.putFile(filePath).addOnSuccessListener(new OnSuccessListener < UploadTask.TaskSnapshot > () {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
UID = fAuth.getCurrentUser().getUid();
DocumentReference documentReference = fStore.collection("users").document(UID);
Map < String, Object > user = new HashMap < > ();
user.put("profileImage", PICK_IMAGE_REQUEST);
Toast.makeText(ProfileActivity.this, "Uploaded", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ProfileActivity.this, "Failed", Toast.LENGTH_SHORT).show();
}
});
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
解决方案
不能像这样使用文件路径作为下载图像的参考。相反,您需要获取由 firebase 提供的下载 url,更改您的代码如下:
StorageReference ref = storageReference.child("Users Profile/" + UUID.randomUUID().toString());
UploadTask uploadTask = ref.putFile(filePath);
Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
@Override
public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
if (task.isSuccessful()) {
//here the upload of the image finish
}
// Continue the task to get a download url
return ref.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
Uri downloadUri = task.getResult(); //this is the download url that you need to pass to your database
//Pass the url to your reference
UID = fAuth.getCurrentUser().getUid();
DocumentReference documentReference = fStore.collection("users").document(UID);
documentReference.update("profileImage", downloadUri);
Toast.makeText(ProfileActivity.this, "Uploaded", Toast.LENGTH_SHORT).show();
} else {
/ Handle failures
// ...
}
}
});
您可以在此处查看更多详细信息:https ://firebase.google.com/docs/storage/android/upload-files#java_1
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