Java 对象不存在于android firebase上载文件的位置
我正在尝试使用firebase存储服务创建应用程序。我有一个从设备本地存储器保存图像的函数,使用图片的URI将其保存到firebase。当尝试将图像上载到firebase服务器时,我得到“对象在位置不存在”,这意味着我的URI存在问题 我正在添加整个活动,以便您可以看到正在发生的事情-Java 对象不存在于android firebase上载文件的位置,java,android,firebase,firebase-storage,Java,Android,Firebase,Firebase Storage,我正在尝试使用firebase存储服务创建应用程序。我有一个从设备本地存储器保存图像的函数,使用图片的URI将其保存到firebase。当尝试将图像上载到firebase服务器时,我得到“对象在位置不存在”,这意味着我的URI存在问题 我正在添加整个活动,以便您可以看到正在发生的事情- public class MainActivity extends AppCompatActivity implements View.OnClickListener { public static
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
public static final int PICK_IMAGE_REQUEST = 1;
public static final int DELAY_MILLIS = 5000;
private Button buttonChooseImage, buttonUpload;
private TextView textViewShowUpload;
private EditText editTextFileName;
private ImageView imageView;
private ProgressBar progressBar;
private Uri imageUri;
private StorageReference storageReference;
private DatabaseReference databaseReference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonChooseImage = findViewById(R.id.button_choose_image);
buttonUpload = findViewById(R.id.button_upload);
textViewShowUpload = findViewById(R.id.text_view_show_uploads);
editTextFileName = findViewById(R.id.edit_text_file_name);
imageView = findViewById(R.id.image_view);
progressBar = findViewById(R.id.progress_bar);
buttonChooseImage.setOnClickListener(this);
buttonUpload.setOnClickListener(this);
textViewShowUpload.setOnClickListener(this);
storageReference = FirebaseStorage.getInstance().getReference("uploads");
databaseReference = FirebaseDatabase.getInstance().getReference("uploads");
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button_choose_image:
openFileChooser();
break;
case R.id.button_upload:
uploadFile();
break;
case R.id.text_view_show_uploads:
break;
}
}
private String getFileExtension(Uri uri) {
ContentResolver cr = getContentResolver();
MimeTypeMap mine = MimeTypeMap.getSingleton();
return mine.getExtensionFromMimeType(cr.getType(uri));
}
private void uploadFile() {
if (imageUri != null) {
StorageReference fileRefrence = storageReference.child(System.currentTimeMillis()
+ "." + getFileExtension(imageUri));
fileRefrence.putFile(imageUri).
addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
progressBar.setProgress(0);
}
}, DELAY_MILLIS);
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_LONG).show();
Upload upload = new Upload(editTextFileName.getText().toString().trim(),
taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
String uploadId = databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, 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());
progressBar.setProgress((int) progress);
}
});
} else {
Toast.makeText(this, "No File Selected", Toast.LENGTH_SHORT).show();
}
}
private void openFileChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_IMAGE_REQUEST);
}
@Override
protected 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) {
imageUri = data.getData();
Picasso.get().load(imageUri).into(imageView);
}
}
}
公共类MainActivity扩展AppCompatActivity实现View.OnClickListener{
公共静态最终整数选取图像请求=1;
公共静态最终整数延迟=5000;
私有按钮ButtonButtonBooseImage、buttonUpload;
私有文本视图文本视图显示上载;
私有EditText editTextFileName;
私人影像视图;
私人ProgressBar ProgressBar;
私有Uri-imageUri;
私有存储参考存储参考;
私有数据库参考数据库参考;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonChooseImage=findviewbyd(R.id.button\u choose\u image);
buttonUpload=findViewById(R.id.button\u上传);
textViewShowUpload=findViewById(R.id.text\u view\u show\u uploads);
editTextFileName=findViewById(R.id.edit\u text\u file\u name);
imageView=findViewById(R.id.image\u视图);
progressBar=findViewById(R.id.progressBar);
ButtonCooseImage.setOnClickListener(此);
buttonUpload.setOnClickListener(这个);
textViewShowUpload.setOnClickListener(此);
storageReference=FirebaseStorage.getInstance().getReference(“上载”);
databaseReference=FirebaseDatabase.getInstance().getReference(“上载”);
}
@凌驾
公共void onClick(视图){
开关(view.getId()){
案例R.id.按钮\u选择\u图像:
openFileChooser();
打破
案例R.id.按钮\上传:
上传文件();
打破
案例R.id.text\u视图\u显示\u上载:
打破
}
}
私有字符串getFileExtension(Uri){
ContentResolver cr=getContentResolver();
MimeTypeMap-mine=MimeTypeMap.getSingleton();
返回mine.getExtensionFromMimeType(cr.getType(uri));
}
私有void上传文件(){
if(imageUri!=null){
StorageReference filereference=StorageReference.child(System.currentTimeMillis()
+“+getFileExtension(imageUri));
filereference.putFile(imageUri)。
addOnSuccessListener(新的OnSuccessListener(){
@凌驾
成功时公共无效(UploadTask.TaskSnapshot TaskSnapshot){
Handler=newhandler();
handler.postDelayed(新的Runnable(){
@凌驾
公开募捐{
progressBar.setProgress(0);
}
},延迟(单位为毫秒);
Toast.makeText(MainActivity.this,“上载成功”,Toast.LENGTH_LONG.show();
Upload Upload=新上载(editTextFileName.getText().toString().trim(),
taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
String uploadId=databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
}
})
.addOnFailureListener(新的OnFailureListener(){
@凌驾
public void onFailure(@NonNull异常e){
e、 printStackTrace();
Toast.makeText(MainActivity.this,e.getMessage(),Toast.LENGTH_SHORT).show();
}
})
.addOnProgressListener(新的OnProgressListener(){
@凌驾
public void onProgress(UploadTask.TaskSnapshot TaskSnapshot){
双进度=(100.0*taskSnapshot.GetByTestTransferred()/taskSnapshot.getTotalByteCount());
progressBar.setProgress((int)progress);
}
});
}否则{
Toast.makeText(这是“未选择文件”,Toast.LENGTH_SHORT).show();
}
}
私有void openFileChooser(){
意图=新意图();
intent.setType(“image/*”);
intent.setAction(intent.ACTION\u GET\u CONTENT);
startActivityForResult(意图、拾取图像请求);
}
@凌驾
受保护的void onActivityResult(int-requestCode、int-resultCode、@Nullable-Intent-data){
super.onActivityResult(请求代码、结果代码、数据);
如果(requestCode==PICK\u IMAGE\u REQUEST&&resultCode==RESULT\u OK
&&数据!=null&&data.getData()!=null){
imageUri=data.getData();
Picasso.get().load(imageUri).into(imageView);
}
}
}
我是否实现了错误的URI
编辑-
从评论中尝试此解决方案,但仍然得到相同的错误-
private void uploadFile() {
if (imageUri != null) {
StorageReference fileReference = storageReference.child("images/" + imageUri.getLastPathSegment());
UploadTask uploadTask = fileReference.putFile(imageUri);
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
progressBar.setProgress(0);
}
}, DELAY_MILLIS);
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_LONG).show();
Upload upload = new Upload(editTextFileName.getText().toString().trim(),
taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
String uploadId = databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, 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());
progressBar.setProgress((int) progress);
}
});
} else {
Toast.makeText(this, "No File Selected", Toast.LENGTH_SHORT).show();
}
}
私有void上传文件(){
if(imageUri!=null){
StorageReference fileReference=StorageReference.child(“images/”+imageUri.getLastPathSegment());
UploadTask UploadTask=fileReference.putFile(imageUri);
uploadTask.addOnSuccessListener(新的OnSuccessListener(){
@凌驾
成功时公共无效(UploadTask.TaskSnapshot TaskSnapshot){
Handler=newhandler();
handler.postDelayed(n
StorageReference imageReference = storageReference.child("uploads");
UploadTask uploadTask = imageReference.putFile(imageuri);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(verify.this, "Upload failed!", Toast.LENGTH_SHORT).show();
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
if (taskSnapshot.getMetadata() != null) {
if (taskSnapshot.getMetadata().getReference() != null) {
Task<Uri> result = taskSnapshot.getStorage().getDownloadUrl();
result.addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
StorageReference fileRefrence = storageReference.child(System.currentTimeMillis()
+ "." + getFileExtension(imageUri));
StorageReference fileRefrence = storageReference.child(imageUri.getLastPathSegment());
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()) {
throw new Exception("task is not succeeded");
} return refStorage.getDownloadUrl();
}//end of throws Exception method
}).addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
if (task.isSuccessful()) {
downUri = task.getResult();
} else {
// Handle failures
// ...
Log.d("<<<<<<<<", "<<<<<<<<<<<<<<<<<<<< not uplooaded ");
}
}//end of onComplete()for getting download uri
});
private void uploadFile(){
if(mImageUri!=null){
storageReference.putFile(mImageUri).continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>()
{
@Override
public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception
{
if (!task.isSuccessful())
{
throw task.getException();
}
return storageReference.getDownloadUrl();
}
}).addOnCompleteListener(new OnCompleteListener<Uri>()
{
@Override
public void onComplete(@NonNull Task<Uri> task)
{
if (task.isSuccessful())
{
Uri downloadUri = task.getResult();
Log.e("TAG", "then: " + downloadUri.toString());
Upload upload = new Upload(mEditTextFileName.getText().toString().trim(),
downloadUri.toString());
databaseReference.push().setValue(upload);
Toast.makeText(MainActivity.this, "Uploaded", Toast.LENGTH_SHORT).show();
} else
{
Toast.makeText(MainActivity.this, "upload failed: " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
}
else{
Toast.makeText(this, "Please upload image!", Toast.LENGTH_SHORT).show();
}
}