Question

我正在使用Firebase Firestore 我想要从数据库中移除数据...正在调整数据，但我的进度对话框已经卡住了。我想我必须使用工作线程，但是我不知道如何使用。

 db = FirebaseFirestore.getInstance();
            db.collection("expenses").document(ids)
                    .delete()
                    .addOnSuccessListener(new OnSuccessListener<Void>() {
                        @Override
                        public void onSuccess(Void aVoid) {

                             Toast.makeText(Expense_Summary.this, "successfully deleted file", Toast.LENGTH_SHORT).show();
                            result = "deleted";
                            hideProgressDialog();
                            finish();

                        }
                    })
                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Log.w("deleting f", "Error deleting document", e);
                            hideProgressDialog();
                            Toast.makeText(Expense_Summary.this, "Error deleting file", Toast.LENGTH_SHORT).show();
                        }
                    });

我提到了doc： https://firebase.google.com/docs/firestore/manage-data/delete-data

Answer 1

试试这个：

 final ProgressDialog progressDialog = ProgressDialog.show(Activity_name_here.this,"Please wait","Processing",true);
                            Runnable runnable=new Runnable() {
                                @Override
                                public void run() {
                                    progressDialog.cancel();
                                }
                            };
                            Handler pdCanceller = new Handler();
                            pdCanceller.postDelayed(runnable, 3000);
 db = FirebaseFirestore.getInstance();
        db.collection("expenses").document(ids)
                .delete()
                .addOnSuccessListener(new OnSuccessListener<Void>() {
                    @Override
                    public void onSuccess(Void aVoid) {

                         Toast.makeText(Expense_Summary.this, "successfully deleted file", Toast.LENGTH_SHORT).show();
                        result = "deleted";
                       progressDialog.dismiss();
                        finish();

                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Log.w("deleting f", "Error deleting document", e);
                        progressDialog.dismiss();
                        Toast.makeText(Expense_Summary.this, "Error deleting file", Toast.LENGTH_SHORT).show();
                    }
                });

使用上面的代码进度对话框将显示文本请等待，并在其旁边写一个小圆圈正在处理。

这个：pdCanceller.postDelayed(runnable, 3000);指定我在这里使用3000毫秒的时间示例。然后，如果成功，将取消进度对话框。或者如果失败也会取消进度对话框。

Ui打击Firebase Firestore删除数据？

1 个答案: