运行时间无法触发动态按钮的按钮单击事件

Question

我已经生成按钮运行时间（在应用程序中）。但我无法处理按钮运行时间的火灾事件。在我的场景中，我有两个文本框 1 用于 "Name"，另一个用于 "Phone No." 和 1 个按钮 "Add"。单击添加按钮时，我动态生成了带有两个按钮 "Call" 和 "Remove".

的一个文本框

但是当点击第一个或第二个呼叫按钮时，它总是拨打最后添加的号码。

代码如下：

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>

我的问题是如何拨打特定号码。但在这种情况下，我只能拨打最后添加的号码。

Answer 1

每次调用 buttonAdd_Click 时，您都会覆盖 textOut。因此，当添加新布局时，textOut 将始终是最后添加的 EditText。这基本上是一个逻辑错误。根据您的逻辑，您应该拥有 EditText 个 List 而不是单个实例。

List<EditText> textOuts; // instead of EditText textOut;
int layoutCount=0;
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);
        textOuts= new List<EditText>();
    }
private void buttonAdd_Click(object sender, EventArgs e)
    {
        int i=layoutCount++;
        LayoutInflater layoutInflater = Application.Context.GetSystemService(Context.LayoutInflaterService) as LayoutInflater;
        View addView = layoutInflater.Inflate(Resource.Layout.row, null);
        textOuts.Add((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 +=delegate(object sender, EventArgs e) {
            var callDialog = new AlertDialog.Builder(this);
       string strNo = After(textOuts[i].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();
        };
            Button buttonRemove = (Button)addView.FindViewById(Resource.Id.remove);
            buttonRemove.Click += ButtonRemove_Click;
        }
        else
        {
            Toast.MakeText(this, "Field can not be blank.", ToastLength.Short).Show();
        }
    }

像上面那样更改代码可能会解决问题。我自己没有测试过代码。

运行时间无法触发动态按钮的按钮单击事件

Run time not able to fire the button click event for dynamic buttons

android

xamarin.android

xamarin

运行 时间无法触发动态按钮的按钮单击事件

Run time not able to fire the button click event for dynamic buttons

android

xamarin.android

xamarin

运行时间无法触发动态按钮的按钮单击事件