今天試著在昨天做的dialogfragment中加入progress bar程式碼如下

xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="50dp"
    android:layout_marginRight="50dp"
    android:orientation="vertical">

   <EditText
       android:id="@+id/account"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:hint="account"/>
   <EditText
       android:id="@+id/password"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:hint="password"/>
   <ProgressBar
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       style="?android:attr/progressBarStyle"
       android:layout_gravity="center"
       android:id="@+id/progressBar"/>
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:orientation="horizontal">
      <Button
          android:id="@+id/login"
          android:layout_width="0dp"
          android:layout_height="wrap_content"
          android:layout_weight="0.5"
          android:text="login"/>
      <Button
          android:id="@+id/cancel"
          android:layout_width="0dp"
          android:layout_height="wrap_content"
          android:layout_weight="0.5"
          android:text="cancel"/>

   </LinearLayout>

</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="50dp"
    android:layout_marginRight="50dp"
    android:orientation="vertical">

   <EditText
       android:id="@+id/account"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:hint="account"/>
   <EditText
       android:id="@+id/password"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:hint="password"/>
   <ProgressBar
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       style="?android:attr/progressBarStyle"
       android:layout_gravity="center"
       android:id="@+id/progressBar"/>
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:orientation="horizontal">
      <Button
          android:id="@+id/login"
          android:layout_width="0dp"
          android:layout_height="wrap_content"
          android:layout_weight="0.5"
          android:text="login"/>
      <Button
          android:id="@+id/cancel"
          android:layout_width="0dp"
          android:layout_height="wrap_content"
          android:layout_weight="0.5"
          android:text="cancel"/>

   </LinearLayout>

</LinearLayout>

DialogFragment:

class FragmentDialog: DialogFragment() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view: View = inflater.inflate(R.layout.dialogfragment , container , false)
        val accountEditView = view.findViewById<EditText>(R.id.account)
        val passwordEditView = view.findViewById<EditText>(R.id.password)
        val loginButton = view.findViewById<Button>(R.id.login)
        val cancelButton = view.findViewById<Button>(R.id.cancel)
        val progressBar = view.findViewById<ProgressBar>(R.id.progressBar)
        progressBar.visibility = View.VISIBLE
        return view
    }
}

成果如下

摁...這樣看器來怪怪的我們看看有那裡可以調整的
把progressbar的xml改成這樣即可

<ProgressBar
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    style="?android:attr/progressBarStyle"
    android:layout_gravity="center"
    android:id="@+id/progressBar"/><ProgressBar
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       style="?android:attr/progressBarStyle"
       android:layout_gravity="center"
       android:id="@+id/progressBar"/>