Image Of Code for getting Download Url我来自孟加拉国，我听说服务器中存在某些问题，这是真的吗？我非常需要一种解决方案，我已经尝试了Internet上所有可用的方法。
要将图像上传到云存储，您需要遵循代码
在gradle中实施库以选择图像格式存储：
implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'
清单中：
<activity
android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:theme="@style/Base.Theme.AppCompat" />
活动中：
private Uri imageUri;
private ImageView _itemImageView;
private Button _uploadBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_new_item);
_itemImageView = findViewById(/*your id here*/);
_uploadBtn = findViewById(/*your id here*/);
_itemImageView.setOnClickListener(n -> {
CropImage.activity().setGuidelines(CropImageView.Guidelines.ON).setAspectRatio(1, 1).start(AddNewItemActivity.this);
});
_uploadBtn.setOnClickListener(n -> {
if (imageUri != null) {
uploadImage();
}
});
}
private void uploadImage() {
if (imageUri != null) {
File newImageFile = new File(imageUri.getPath());
_progressBar.setVisibility(View.VISIBLE);
DatabaseReference reference = FirebaseDatabase.getInstance().getReference().child("your loaction ");
String pushKey = reference.push().getKey();
StorageReference storage = FirebaseStorage.getInstance().getReference("your storage location")
.child("thumbs/");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
compressedImageFile.compress(Bitmap.CompressFormat.JPEG, 30, baos);
byte[] thumbData = baos.toByteArray();
UploadTask uploadTask = storage.child(pushKey + ".jpeg").putBytes(thumbData);
uploadTask.addOnSuccessListener(taskSnapshot -> {
if (taskSnapshot.getMetadata() != null && taskSnapshot.getMetadata().getReference() != null) {
Task<Uri> result = taskSnapshot.getStorage().getDownloadUrl();
result.addOnSuccessListener(uri -> {
String thumbImageDownloadUri = uri.toString();
//here update the profile information to the firebase database or firestore
//do following
uploadData(thumbImageDownloadUri, reference, pushKey);
});
}
}).addOnFailureListener(e -> {
Toast.makeText(AddNewItemActivity.this, "error: " + e.getMessage(), Toast.LENGTH_SHORT).show();
_progressBar.setVisibility(View.GONE);
});
}
}
//this will upload the download image url to the data base form where user can download image
private void uploadData(String thumbImageUri, DatabaseReference reference, String pushKey) {
reference.child(defItemCategory[0] + "/" + pushKey).setValue(
/*add your custom data model*/
new User(thumbImageUri)
).addOnCompleteListener(task -> {
if (task.isSuccessful()) {
Toast.makeText(AddNewItemActivity.this, "upload successful", Toast.LENGTH_SHORT).show();
_progressBar.setVisibility(View.GONE);
}
}).addOnFailureListener(e -> {
Toast.makeText(AddNewItemActivity.this, "error: " + e.getMessage(), Toast.LENGTH_SHORT).show();
_progressBar.setVisibility(View.GONE);
});
}
// get your selected image result
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
CropImage.ActivityResult result = CropImage.getActivityResult(data);
if (resultCode == RESULT_OK) {
imageUri = result.getUri();
if (imageUri != null) {
_itemImageView.setImageURI(imageUri);
}
} else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
Exception error = result.getError();
}
}
}