【发布时间】：2019-07-08 07:31:50
【问题描述】：
我正在尝试使用 Firebase 存储服务创建应用。我有一个从设备本地存储中保存图像的功能，使用图片的 URI 将其保存到 firebase。尝试将图像上传到 firebase 服务器时，我得到“该位置不存在对象”，这可能意味着我的 URI 存在问题。
我正在添加整个活动，以便您查看发生了什么 -
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);
}
}
}
我是否错误地实现了 URI？
编辑 -
从 cmets 尝试了这个解决方案，但仍然得到同样的错误 -
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();
}
}
【问题讨论】：
-
是图像显示在 imageView
Picasso.get().load(imageUri).into(imageView);，还是getFileExtension给你正确的扩展？ -
关于图像视图 - 是的，它正在显示。关于 getFileExtension - 似乎它没有打印以记录任何内容，我尝试在我的 uploadFile 方法中将 fileRefrence.getPath() 和 fileRefrence.getName() 都打印到日志中，但没有出现任何内容。
-
您的文件是否已成功上传到 Firebase 存储，之后您可以更新 Firebase 实时数据库吗？
-
不。没有任何内容被添加到 Firebase 存储中，显然我无法编辑任何内容。
标签： java android firebase firebase-storage