Question

我正在尝试从Firebase存储到我的应用程序打开pdf文件。这是我获取文件网址的代码。

StorageReference fileref=mStorage.getReferenceFromUrl(selectedItem.getFileUrl());
String fileref_string=fileref.toString();
Uri file_uri=Uri.parse(fileref_string);

但它显示此错误：

java.io.FileNotFoundException：没有内容提供者：gs：//funn-30a97.appspot.com/uploads/1531599733740.pdf

如何处理？

用于上传文件的代码： mFileUri是设备中文件的网址。

if (mFileUri != null) {
        StorageReference fileReference = mStorageRef.child(System.currentTimeMillis() + "." + getFileExtension(mFileUri));
        fileReference.putFile(mFileUri)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        Handler handler = new Handler();
                        handler.postDelayed(new Runnable() {
                            @Override
                            public void run() {
                                mProgressBar.setProgress(0);
                            }
                        }, 5000);
                        Toast.makeText(upload.this, "Upload Successful", Toast.LENGTH_LONG).show();
                        Uploading uploading = new Uploading(mEditTextFileName.getText().toString().trim(), taskSnapshot.getDownloadUrl().toString());
                        String uploadId = mDatabaseRef.push().getKey();
                        mDatabaseRef.child(uploadId).setValue(uploading);


                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Toast.makeText(upload.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());
                        mProgressBar.setProgress((int) progress);
                    }
                });

上传课程：

public class Uploading {
private String mname;
private String mfileUrl;
private String mKey;

public Uploading() {

}

public Uploading(String name, String fileUrl) {
    if (name.trim().equals("")) {
        name = "no name";
    }
    mname = name;
    mfileUrl = fileUrl;
}

public String getName() {
    return mname;
}

public void setName(String Name) {
    mname = Name;
}

public String getFileUrl() {
    return mfileUrl;
}

public void setfileUrl(String url) {
    mfileUrl = url;
}

@Exclude
public String getKey() {
    return mKey;
}

@Exclude
public void setKey(String key) {
    mKey = key;
}

}

Answer 1

这不是正确的方法。您不应该在toString()对象上调用StorageReference。

尝试一下：

    if (fileref.getPath().length() != 0) {
        fileref.getDownloadUrl()
               .addOnSuccessListener(new OnSuccessListener<Uri>() {
                   @Override
                   public void onSuccess(Uri uri) {
                       // Now you have the Uri of your file
                   }
               });
    }

祝你好运！

Android Studio如何处理'java.io.FileNotFoundException：No content provider'错误

1 个答案: