Question

在这里开发Android应用程序我正在动态生成EditText和来自row.xml文件的Call和Remove按钮。将这些控件添加到LinearLayout我按照我的意愿实现，但我的问题是我想将EditText值保存到xml文件中。因此，下次打开此应用程序时，将从xml文件中填充特定值。

向TextBox添加姓名和手机号码，然后点击"Add"按钮，这些值会动态添加到LinearLayout。当我点击Add这个值存储到xml文件中时，每当我启动应用程序时，存储的xml值都被填充到LinearLayout。

这是我的代码

public class MainActivity : Activity
    {
        int count = 1;
        EditText textIn, txtPhoneNo;
        Button buttonAdd;
        LinearLayout container;
        EditText textOut;
        System.Collections.ArrayList arrList = new System.Collections.ArrayList();
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            SetContentView(Resource.Layout.Main);

            textIn = (EditText)FindViewById(Resource.Id.textin);
            txtPhoneNo = (EditText)FindViewById(Resource.Id.txtPhoneNo);
            buttonAdd = (Button)FindViewById(Resource.Id.add);
            container = (LinearLayout)FindViewById(Resource.Id.container);
        }

        private void buttonAdd_Click(object sender, EventArgs e)
        {
            LayoutInflater layoutInflater = Application.Context.GetSystemService(Context.LayoutInflaterService) as LayoutInflater;
            View addView = layoutInflater.Inflate(Resource.Layout.row, null);
            textOut = (EditText)addView.FindViewById(Resource.Id.textout);
            arrList.Add(txtPhoneNo.Text);
            if (textIn.Text != "" && txtPhoneNo.Text != "")
            {
                textOut.SetText(textIn.Text + " : " + txtPhoneNo.Text, TextView.BufferType.Normal);
                container.AddView(addView);
                Button btnCall = (Button)addView.FindViewById(Resource.Id.btnCall);
                btnCall.Click += BtnCall_Click;
                Button buttonRemove = (Button)addView.FindViewById(Resource.Id.remove);
                buttonRemove.Click += ButtonRemove_Click;
            }
            else
            {
                Toast.MakeText(this, "Field can not be blank.", ToastLength.Short).Show();
            }
        }

        private void BtnCall_Click(object sender, EventArgs e)
        {
            var callDialog = new AlertDialog.Builder(this);
           string strNo = After(textOut.Text,":");
            callDialog.SetMessage("Call " + strNo + "?");
            callDialog.SetNeutralButton("Call", delegate
            {
                 var callIntent = new Intent(Intent.ActionCall);
                callIntent.SetData(Android.Net.Uri.Parse("tel:" + strNo));
                StartActivity(callIntent);
            });
            callDialog.SetNegativeButton("Cancel", delegate { });

            // Show the alert dialog to the user and wait for response.
            callDialog.Show();
        }
}
}

Main.axml


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <EditText
        android:id="@+id/textin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:hint="name" />
    <EditText
        android:id="@+id/txtPhoneNo"
        android:layout_width="345.0dp"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:hint="Phone No." />
    <Button
        android:id="@+id/add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:text="Add" />
    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" />
</LinearLayout>
row.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="wrap_content">
  <Button
      android:id="@+id/remove"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentRight="true"
      android:text="Remove"/>
  <Button
      android:id="@+id/btnCall"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_toLeftOf="@id/remove"
      android:text="Call"/>
  <EditText
      android:id="@+id/textout"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_toLeftOf="@id/remove"/>
</RelativeLayout>

Answer 1

不，你不能

您无法动态地将控件存储到xml布局中。您可以手动将其添加到xml，也可以创建单独的xml进行控制，然后将include xml创建为您的父xml

<include 
  android:layout="id of your layout"
//height ... width
/>

在两种方式中，您都必须创建xml。

我们正在创建xml并在我们的java课程中对其进行充气。你想做的就完全相反了。

<强>更新

使用共享偏好

SharedPreference shared= context.getSharedPreferences("your preference name",
                Context.MODE_PRIVATE);

String value = shared.getString("UserPhone","no data");

//set this value to your control

Answer 2

我认为你需要在android中引用SharedPreferences。这符合您的目的。

无法将LinearLayout值保存到xml文件

2 个答案: