我正在将图像上传到Firebase数据库和存储中。 在存储中，我可以看到HTTP Url，但是在我的Firebase数据库中，它没有使用图像检索HTTP Url。
但是，它检索以下内容 图片“ com.google.android.gms.tasks.zzu@d678887”
我尝试查看Firebase代码并使用addOnlisterners，但没有任何更改。努力了解香港专业教育学院哪里出了错
public class PostActivity extends Fragment implements SelectPhotoDialog.OnPhotoSelectedListener {
private static final String TAG = "PostFragment";
@Override
public void getImagePath(Uri imagePath) {
Log.d(TAG, "getImagePath: setting the image to imageview");
UniversalImageLoader.setImage(imagePath.toString(), mPostImage);
//assign to global variable
mSelectedBitmap = null;
mSelectedUri = imagePath;
}
@Override
public void getImageBitmap(Bitmap bitmap) {
Log.d(TAG, "getImageBitmap: setting the image to imageview");
mPostImage.setImageBitmap(bitmap);
//assign to a global variable
mSelectedUri = null;
mSelectedBitmap = bitmap;
}
//widgets
private ImageView mPostImage;
private EditText mTitle, mDescription, mPrice, mCountry, mStateProvince, mCity, mContactEmail;
private Button mPost;
private ProgressBar mProgressBar;
//vars
private Bitmap mSelectedBitmap;
private Uri mSelectedUri;
private byte[] mUploadBytes;
private double mProgress = 0;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_post, container, false);
mPostImage = view.findViewById(R.id.post_image);
mTitle = view.findViewById(R.id.input_title);
mDescription = view.findViewById(R.id.input_description);
mPrice = view.findViewById(R.id.input_price);
mCountry = view.findViewById(R.id.input_country);
mStateProvince = view.findViewById(R.id.input_state_province);
mCity = view.findViewById(R.id.input_city);
mContactEmail = view.findViewById(R.id.input_email);
mPost = view.findViewById(R.id.btn_post);
mProgressBar = (ProgressBar) view.findViewById(R.id.progressBar);
ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(getActivity()));
getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
init();
return view;
}
private void init(){
mPostImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: opening dialog to choose new photo");
SelectPhotoDialog dialog = new SelectPhotoDialog();
dialog.show(getFragmentManager(), getString(R.string.dialog_select_photo));
dialog.setTargetFragment(PostActivity.this, 1);
}
});
mPost.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: attempting to post...");
if(!isEmpty(mTitle.getText().toString())
&& !isEmpty(mDescription.getText().toString())
&& !isEmpty(mPrice.getText().toString())
&& !isEmpty(mCountry.getText().toString())
&& !isEmpty(mStateProvince.getText().toString())
&& !isEmpty(mCity.getText().toString())
&& !isEmpty(mContactEmail.getText().toString())){
//we have a bitmap and no Uri
if(mSelectedBitmap != null && mSelectedUri == null){
uploadNewPhoto(mSelectedBitmap);
}
//we have no bitmap and a uri
else if(mSelectedBitmap == null && mSelectedUri != null){
uploadNewPhoto(mSelectedUri);
}
}else{
Toast.makeText(getActivity(), "You must fill out all the fields", Toast.LENGTH_SHORT).show();
}
}
});
}
private void uploadNewPhoto(Bitmap bitmap){
Log.d(TAG, "uploadNewPhoto: uploading a new image bitmap to storage");
BackgroundImageResize resize = new BackgroundImageResize(bitmap);
Uri uri = null;
resize.execute(uri);
}
private void uploadNewPhoto(Uri imagePath){
Log.d(TAG, "uploadNewPhoto: uploading a new image uri to storage.");
BackgroundImageResize resize = new BackgroundImageResize(null);
resize.execute(imagePath);
}
public class BackgroundImageResize extends AsyncTask<Uri, Integer, byte[]>{
Bitmap mBitmap;
public BackgroundImageResize(Bitmap bitmap) {
if(bitmap != null){
this.mBitmap = bitmap;
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
Toast.makeText(getActivity(), "compressing image", Toast.LENGTH_SHORT).show();
showProgressBar();
}
@Override
protected byte[] doInBackground(Uri... params) {
Log.d(TAG, "doInBackground: started.");
if(mBitmap == null){
try{
RotateBitmap rotateBitmap = new RotateBitmap();
mBitmap = rotateBitmap.HandleSamplingAndRotationBitmap(getActivity(), params[0]);
}catch (IOException e){
Log.e(TAG, "doInBackground: IOException: " + e.getMessage());
}
}
byte[] bytes = null;
Log.d(TAG, "doInBackground: megabytes before compression: " + mBitmap.getByteCount() / 1000000 );
bytes = getBytesFromBitmap(mBitmap, 100);
Log.d(TAG, "doInBackground: megabytes before compression: " + bytes.length / 1000000 );
return bytes;
}
@Override
protected void onPostExecute(byte[] bytes) {
super.onPostExecute(bytes);
mUploadBytes = bytes;
hideProgressBar();
//execute the upload task
executeUploadTask();
}
}
private void executeUploadTask(){
Toast.makeText(getActivity(), "uploading image", Toast.LENGTH_SHORT).show();
final String postId = FirebaseDatabase.getInstance().getReference().push().getKey();
final StorageReference storageReference = FirebaseStorage.getInstance().getReference()
.child("posts/users/" + FirebaseAuth.getInstance().getCurrentUser().getUid() +
"/" + postId + "/post_image");
UploadTask uploadTask = storageReference.putBytes(mUploadBytes);
uploadTask.addOnSuccessListener(taskSnapshot -> {
Toast.makeText(getActivity(), "Post Success", Toast.LENGTH_SHORT).show();
//insert the download url into the firebase database
//Uri firebaseUri = taskSnapshot.getDownloadUrl();
Task<Uri> firebaseUri = taskSnapshot.getStorage().getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
System.out.println(uri.toString());
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
//Handle any errors
}
});
storageReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Uri downloadUrl = uri;
Log.d(TAG, "onSuccess: firebase download url: " + firebaseUri.toString());
DatabaseReference reference = FirebaseDatabase.getInstance().getReference();
Post post = new Post();
post.setImage(downloadUrl.toString());
post.setCity(mCity.getText().toString());
post.setContact_email(mContactEmail.getText().toString());
post.setCountry(mCountry.getText().toString());
post.setDescription(mDescription.getText().toString());
post.setPost_id(postId);
post.setPrice(mPrice.getText().toString());
post.setState_province(mStateProvince.getText().toString());
post.setTitle(mTitle.getText().toString());
post.setUser_id(FirebaseAuth.getInstance().getCurrentUser().getUid());
reference.child(getString(R.string.node_posts))
.child(postId)
.setValue(post);
resetFields();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(getActivity(), "could not upload photo", Toast.LENGTH_SHORT).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double currentProgress = (100 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
if( currentProgress > (mProgress + 15)){
mProgress = (100 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
Log.d(TAG, "onProgress: upload is " + mProgress + "& done");
Toast.makeText(getActivity(), mProgress + "%", Toast.LENGTH_SHORT).show();
}
}
});
}
public static byte[] getBytesFromBitmap(Bitmap bitmap, int quality){
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, quality,stream);
return stream.toByteArray();
}
private void resetFields(){
UniversalImageLoader.setImage("", mPostImage);
mTitle.setText("");
mDescription.setText("");
mPrice.setText("");
mCountry.setText("");
mStateProvince.setText("");
mCity.setText("");
mContactEmail.setText("");
}
private void showProgressBar(){
mProgressBar.setVisibility(View.VISIBLE);
}
private void hideProgressBar(){
if(mProgressBar.getVisibility() == View.VISIBLE){
mProgressBar.setVisibility(View.INVISIBLE);
}
}
/**
* Return true if the @param is null
* @param string
* @return
*/
private boolean isEmpty(String string){
return string.equals("");
}
}
答案 0 :(得分：1)
上面的日志无法正常工作，因为它为您提供了com.google.android.gms.tasks.zzu@1234567的任务，请尝试将日志放入onSuccess中。
uploadTask.addOnSuccessListener(taskSnapshot -> {
Toast.makeText(getActivity(), "Post Success", Toast.LENGTH_SHORT).show();
//insert the download url into the firebase database
//Uri firebaseUri = taskSnapshot.getDownloadUrl();
storageReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Uri downloadUrl = uri;
Log.d(TAG, "onSuccess: firebase download url: " + firebaseUri.toString());
DatabaseReference reference = FirebaseDatabase.getInstance().getReference();
Post post = new Post();
post.setImage(downloadUrl.toString());
post.setCity(mCity.getText().toString());
post.setContact_email(mContactEmail.getText().toString());
post.setCountry(mCountry.getText().toString());
post.setDescription(mDescription.getText().toString());
post.setPost_id(postId);
post.setPrice(mPrice.getText().toString());
post.setState_province(mStateProvince.getText().toString());
post.setTitle(mTitle.getText().toString());
post.setUser_id(FirebaseAuth.getInstance().getCurrentUser().getUid());
reference.child(getString(R.string.node_posts))
.child(postId)
.setValue(post);
resetFields();
}
})
并开始在onSuccess内部存储，以便您可以在数据库中获取uri。