进度条没有出现 - Kotlin

Question

我在显示进度条时总是出错。这是 XML

的代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ProgressBar
        android:id="@+id/progress_bar"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="150dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</RelativeLayout>

然后在我的 kotlin 代码中，我一直在显示进度条时出错

OnCreate()

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_splash_screen)

        init()
    }

showRegisterLayout() - 突出显示的部分是我的错误

private fun showRegisterLayout() {
        val builder = AlertDialog.Builder(this,R.style.DialogTheme)
        val itemView = LayoutInflater.from(this).inflate(R.layout.layout_register,null)

        val edt_first_name = itemView.findViewById<View>(R.id.edt_first_name) as TextInputEditText
        val edt_last_name = itemView.findViewById<View>(R.id.edt_last_name) as TextInputEditText
        val edt_phone_number = itemView.findViewById<View>(R.id.edt_phone_number) as TextInputEditText

        val btn_continue = itemView.findViewById<View>(R.id.btn_register) as Button

        //set_data
        if(FirebaseAuth.getInstance().currentUser!!.phoneNumber != null &&
            !TextUtils.isDigitsOnly(FirebaseAuth.getInstance().currentUser!!.phoneNumber))
            edt_phone_number.setText(FirebaseAuth.getInstance().currentUser!!.phoneNumber)

        //view
        builder.setView(itemView)
        val dialog = builder.create()
        dialog.show()

        //Event
        btn_continue.setOnClickListener {
            if(TextUtils.isDigitsOnly(edt_first_name.text.toString())){
            Toast.makeText(this@SplashScreenActivity,"Enter your First Name", Toast.LENGTH_SHORT).show()
            return@setOnClickListener
            }
            else if(TextUtils.isDigitsOnly(edt_last_name.text.toString())){
                Toast.makeText(this@SplashScreenActivity,"Enter your Last Name", Toast.LENGTH_SHORT).show()
                return@setOnClickListener
            }
            else if(TextUtils.isDigitsOnly(edt_phone_number.text.toString())){
                Toast.makeText(this@SplashScreenActivity,"Enter your Phone Number", Toast.LENGTH_SHORT).show()
                return@setOnClickListener
            }
            else
            {
                val model = DriverInfoModel()
                model.firstName = edt_first_name.text.toString()
                model.lastName = edt_last_name.text.toString()
                model.phoneNumber = edt_phone_number.text.toString()

                model.rating = 0.0

                driverInfoRef.child(FirebaseAuth.getInstance().currentUser!!.uid)
                    .setValue(model)
                    .addOnFailureListener{ e ->
                        Toast.makeText(this@SplashScreenActivity,""+e.message, Toast.LENGTH_SHORT).show()
                        dialog.dismiss()
                        progress_bar.visibility = View.GONE
                    }
                    .addOnSuccessListener {
                        Toast.makeText(this@SplashScreenActivity,"Registered Successfully", Toast.LENGTH_SHORT).show()
                        dialog.dismiss()
                        progress_bar.visibility = View.GONE
                    }
            }
        }
    }

progress_bar.visibility = View.GONE 是我的错误 progress_bar 它一直显示红色。我尝试修复它但没有进展。希望有人能帮助我:)

Answer 1

如果您使用合成绑定，请确保您已从正确的 xml 布局文件中导入 progress_bar。

否则使用 findViewById 正确初始化 progress_bar。

我推荐使用更安全的ViewBinding。

进度条没有出现 - Kotlin

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