Question

我有一个片段（片段）和一个对话框片段（RadioListAlert）。我想在警报对话框中添加“确定”和“取消”按钮。单击确定按钮时，可选项目名称传递给CarFragment。怎么办。

我的代码在这里：

RadioListAlert.java：

package com.h2o;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.widget.Toast;


public class RadioListAlert extends DialogFragment {

    CharSequence[] tag = { "BMW", "AUDI", "MERCEDES", "FERRARI", "SKODA" };

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setCancelable(true);
        builder.setTitle("Tag Your Car").setSingleChoiceItems(tag, -1,
                new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getActivity(), tag[which],
                                Toast.LENGTH_SHORT).show();


                    }
                });
        return builder.create();
    }
}

CarFragment.java：

//Call RadioListAlert class
new RadioListAlert().show(getActivity().getFragmentManager(), "Radio Alert");

请有人帮助我!!!

提前致谢

Answer 1

您可以设置正面和负面按钮：

builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    //your code to pass a bundle to fragment
                }
            }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    //do what you want when cancel is clicked
                }
            });

Answer 2

您需要使用方法setNegativeButton()和setOnPositiveButton添加确定和取消按钮。要将数据发送到您的片段，您需要创建一个接口来保存该数据，您的片段将实现它。它会像new RadioListAlert().setDialogListener(CarFragment.this).show(getActivity().getFragmentManager(), "Radio Alert");

在解除对话框之前，请记住在{strong>确定按钮调用onClickListener时调用该侦听器。

修改

public class RadioListAlert extends DialogFragment { CharSequence[] tag = { "BMW", "AUDI", "MERCEDES", "FERRARI", "SKODA" }; private CarListener carListener; private String itemClicked; @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setCancelable(true); builder.setTitle("Tag Your Car").setSingleChoiceItems(tag, -1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(getActivity(), tag[which],Toast.LENGTH_SHORT).show(); itemClicked = (String) tag[which]; } }).setPositiveButton("Ok", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { if(carListener != null) carListener.itemClicked(itemClicked); //to dismiss the dialog after user choose an item and click ok, you can also add some validation before dismissing the dialog dismiss(); } }); return builder.create(); } public void setListener(CarListener carListener) { this.carListener = carListener; } public interface CarListener { void itemClicked(String text); } }
你的carFragment中的
实现CarListner

Answer 3

试试这个

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    // Get the layout inflater
    LayoutInflater inflater = getActivity().getLayoutInflater();

    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    final View mView = inflater.inflate(R.layout.myalert, null);
    builder.setView(mView);

    final RadioGroup radioGroup = (RadioGroup) mView.findViewById(R.id.radioGroup1);
    builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {

            int checkedId = radioGroup.getCheckedRadioButtonId();
            RadioButton radioButton = (RadioButton) mView.findViewById(checkedId);
            Log.d("alert", checkedId+"");

            --------------- your code---------------
        }
    });

    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {

            --------------- your code---------------

        }
    });

    builder.show();

您的自定义提醒对话框布局为：myalert

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:orientation="vertical" >

<RadioGroup
    android:id="@+id/radioGroup1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <RadioButton
        android:id="@+id/radio0"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="RadioButton" />

    <RadioButton
        android:id="@+id/radio1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RadioButton" />

    <RadioButton
        android:id="@+id/radio2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RadioButton" />
</RadioGroup>

如何使用单选按钮在警告对话框中添加确定和取消按钮

3 个答案: