Question

    SharedPreferences prefs = getSharedPreferences("TOKEN_PREF", MODE_PRIVATE);
            String token = prefs.getString("token", "");
            FirebaseApp.initializeApp(MainActivity.this);
            FirebaseInstanceId.getInstance().getInstanceId().addOnCompleteListener(new OnCompleteListener<InstanceIdResult>()
            {
                @Override
                public void onComplete(@NonNull Task<InstanceIdResult> task)
                {
                    if(task.isSuccessful())
                    {
                        String genToken = task.getResult().getToken();
                        SharedPreferences.Editor editor = getSharedPreferences("TOKEN_PREF", MODE_PRIVATE).edit();
                        editor.putString("token", genToken);
                        editor.apply();
                    }
                    else
                    {
                        Toast.makeText(MainActivity.this, "Token error : "+task.getException().getMessage(), Toast.LENGTH_SHORT).show();
                    }
                }
            });

上面的代码是用户登录帐户时使用的代码，以便我在登录过程中根据用户ID生成令牌并将其存储到数据库中。

Answer 1

实施此方法并检查

import pandas as pd
df = pd.DataFrame(base_list, columns=['col1', ...])
df.set_index('col1', inplace=True)//Set Col1 as your index
df.dropna(how='all')//or you can use how='any' depending on your need

FCM令牌不是第一次生成，而是在第二次之后生成

1 个答案: