我正在尝试用相机拍照并上传到Firebase。我使用AlertDialog询问用户是否想要使用相机或从图库中选择图像。我可以用相机拍照,但是当我试图上传图像时,它说找不到图像。
以下是我的图像选择方法:
private void imageSelect(Context context) {
final CharSequence[] options = { "Take Photo", "Choose from Gallery","Cancel" };
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Choose Image");
builder.setItems(options, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (options[item].equals("Take Photo")) {
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePicture, 0);
} else if (options[item].equals("Choose from Gallery")) {
Intent pickPhoto = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(pickPhoto , 1);
} else if (options[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode) {
case 0:
if(resultCode == RESULT_OK){
filePath = data.getData();
}
break;
case 1:
if(resultCode == RESULT_OK){
filePath = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
}
catch (IOException e)
{
e.printStackTrace();
}
}
break;
}
}
下面是我上传图片的方法:
private void uploadImage() {
if (filePath != null) {
//Code for showing progressDialog while uploading
ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setTitle("Uploading...");
progressDialog.show();
StorageReference ref = storageReference.child("images/" + name);
//Adding listeners on upload or failure of image
ref.putFile(filePath).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
//Image uploaded successfully
progressDialog.dismiss();
Toast.makeText(add_property.this, "Image Uploaded!", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
//Error, Image not uploaded
progressDialog.dismiss();
Toast.makeText(add_property.this, "Failed " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
//Progress Listener for loading
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
progressDialog.setMessage("Uploaded " + (int) progress + "%");
}
});
}
else {
Toast.makeText(getApplicationContext(),"No image found",Toast.LENGTH_SHORT).show();
}
}
提前感谢任何帮助的朋友。
一个潜在的解决方法是将字节数组上传到firebase中;因此,当使用相机拍摄照片时,您可以从在onActivityResult()
中接收到的意图中获取位图字节数组,并最终使用ref.putBytes()
方法将字节数组上载到firebase存储。
这可以通过以下几个步骤完成:
在这里,我假设onActivityResult()
中相机的请求代码
为1:
final int FROM_GALLERY = 0;
final int FROM_CAMERA = 1;
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK && data != null) {
switch (requestCode) {
case FROM_GALLERY:
// Handle image from the gallery
filePath = data.getData();
break;
case FROM_CAMERA:
// Handle image from the camera
if (data.getExtras() != null) {
Bitmap photoBitmap = (Bitmap) data.getExtras().get("data");
byte[] bitmapBytes = getBytesFromBitmap(bitmap, 100);
uploadToFirebase(bitmapBytes);
}
break;
}
}
}
// convert from bitmap to byte array
public static byte[] getBytesFromBitmap(Bitmap bitmap, int quality) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, stream);
// bitmap.compress(Bitmap.CompressFormat.PNG, quality, stream); // According to the needed quality
return stream.toByteArray();
}
public void uploadToFirebase(bytes[] bytes) {
StorageReference ref = ....
ref.putBytes(bytes)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
}
});
}
这是我的代码,我用我的应用程序和工作正常,尝试它,如果它的作品,然后恭喜
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_upload, container, false);
requireActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
Button chooseImageButton = view.findViewById(R.id.upload_image_button);
Button uploadImageButton = view.findViewById(R.id.done_button);
uploadImageView = view.findViewById(R.id.upload_image_view);
storageReference = FirebaseStorage.getInstance().getReference("uploads");
databaseReference = FirebaseDatabase.getInstance().getReference("uploads");
chooseImageButton.setOnClickListener(v -> openFileChooser());
uploadImageButton.setOnClickListener(v -> {
if (mUploadTask != null && mUploadTask.isInProgress()) {
Toast.makeText(getActivity(), "Upload in Progress", Toast.LENGTH_SHORT).show();
} else {
uploadToFirebase(mImageUri);
}
});
return view;
}
private void openFileChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_IMAGE_REQUEST);
}
@Override
public 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(uploadImageView);
}
}
private String getFileExtension(Uri uri) {
ContentResolver contentResolver = requireActivity().getContentResolver();
MimeTypeMap mime = MimeTypeMap.getSingleton();
return mime.getExtensionFromMimeType(contentResolver.getType(uri));
}
private void uploadToFirebase(Uri mImageUri) {
if (mImageUri != null) {
final ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setTitle("Uploading...");
progressDialog.show();
StorageReference reference = storageReference.child(System.currentTimeMillis()
+ "." + getFileExtension(mImageUri));
reference.putFile(mImageUri)
.addOnSuccessListener(taskSnapshot -> {
progressDialog.dismiss();
Toast.makeText(getActivity(), "Saved Succesfully", Toast.LENGTH_SHORT).show();
reference.getDownloadUrl()
.addOnSuccessListener(uri -> {
Upload upload = new Upload(uri.toString());
String uploadId = databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
});
})
.addOnProgressListener(snapshot -> {
double progress = (100.0 * snapshot.getBytesTransferred() / snapshot
.getTotalByteCount());
progressDialog.setMessage("Uploaded " + (int) progress + "%");
})
.addOnFailureListener(e -> {
progressDialog.dismiss();
Toast.makeText(getActivity(), "Error Ocurred" + e.getMessage(), Toast.LENGTH_SHORT).show();
});
}
}
}
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