Question

当用户登录并且他关闭移动数据或wi-fi我的应用程序崩溃。如果用户仍然连接到Internet或以某种方式处理此错误，如何在进程运行时检查。提前谢谢你，我很抱歉我的英语。

firebaseAuth.signInWithEmailAndPassword(UserEmail, UserPassword)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            progressDialog.dismiss();
                            startActivity(new Intent(LogIn.this, MainActivity.class));
                            Toast.makeText(LogIn.this, "Logged in succesfully!", Toast.LENGTH_SHORT).show();
                            finish();
                        } else {
                            FirebaseAuthException e = (FirebaseAuthException) task.getException();
                            progressDialog.dismiss();
                            Toast.makeText(LogIn.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                        }
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                       Toast.makeText(LogIn.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                });

更新

java.lang.ClassCastException: com.google.firebase.FirebaseNetworkException cannot be cast to com.google.firebase.auth.FirebaseAuthException
                                                                                                at com.example.mypc.ex.LogInRegister.LogIn$2.onComplete(LogIn.java:104)
                                                                                                at com.google.android.gms.tasks.zzf.run(Unknown Source)
                                                                                                at android.os.Handler.handleCallback(Handler.java:815)
                                                                                                at android.os.Handler.dispatchMessage(Handler.java:104)
                                                                                                at android.os.Looper.loop(Looper.java:194)
                                                                                                at android.app.ActivityThread.main(ActivityThread.java:5637)
                                                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                                                at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
                                                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

更新v2

firebaseAuth.signInWithEmailAndPassword(UserEmail, UserPassword)
                    .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (task.isSuccessful()) {
                                progressDialog.dismiss();
                                startActivity(new Intent(LogIn.this, MainActivity.class));
                                Toast.makeText(LogIn.this, "Logged in succesfully!", Toast.LENGTH_SHORT).show();
                                finish();
                            } else {
                                FirebaseException e = (FirebaseException) task.getException();
                                progressDialog.dismiss();
                                Toast.makeText(LogIn.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                            }
                        }
                    });

Answer 1

发布示例代码有助于澄清您的问题，但一般来说，您总是可以捕获非运行时异常并处理它。

所以你的代码部分执行与firebase的连接，用try catch块包装它。在日志中打印出错误消息，然后找出一个让用户知道的逻辑取决于该异常中抛出的消息。

编辑：我在更新你的帖子后现在看到了问题：

                   else {
                            FirebaseAuthException e = (FirebaseAuthException) task.getException();
                            progressDialog.dismiss();
                            Toast.makeText(LogIn.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                        }

您假设异常始终为FirebaseAuthException，您可以在日志中看到它是FirebaseNetworkException

这是应该如何

firebaseAuth.signInWithEmailAndPassword(UserEmail, UserPassword)
                    .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {

                            try{
                                if (task.isSuccessful()) {
                                    progressDialog.dismiss();
                                    startActivity(new Intent(LogIn.this, MainActivity.class));
                                    Toast.makeText(LogIn.this, "Logged in succesfully!", Toast.LENGTH_SHORT)
                                         .show();
                                    finish();
                                }
                            }
                            catch (FirebaseAuthException | FirebaseNetworkException e){
                                    progressDialog.dismiss();
                                    Toast.makeText(LogIn.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                            }
                    })
                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Toast.makeText(LogIn.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                        }
                    });
    }

Firebase登录用户从互联网断开连接

1 个答案: