【举例】Android自定义Dialog——选择一个RadioButton

版权声明：本文为博主项目中经验总结，著文备份，欢迎补充交流！ https://blog.csdn.net/u013806583/article/details/62896216

1. 自定义Dialog的界面

<--!dialog_selectserver.xml-->

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rootView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/mydiabg"
    android:orientation="vertical">


    <TextView
        android:id="@+id/groupnameet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:text="选择服务器\n"
        android:textColor="@color/blue"
        android:textSize="25sp" />

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginBottom="10dp"
        android:background="@color/lightgrey"
        android:padding="20dp" />

    <RadioGroup
        android:id="@+id/selectserver_radiogrp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal">

        <RadioButton
            android:id="@+id/labserver_radiobtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="实验室服务器"
            android:textColor="@color/black"
            android:textSize="18dp">

        </RadioButton>

        <RadioButton
            android:id="@+id/aliyunserver_radiobtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="阿里云服务器"
            android:textColor="@color/black"
            android:textSize="18dp"></RadioButton>
    </RadioGroup>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="\n" />


</LinearLayout>

2. Dialog的形状背景等设置

<--!diabg_bkg.xml-->

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="@android:color/white" />
    <corners android:radius="16dp" />

</shape>

3. 关于该Dialog的Java类文件

import android.app.Dialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RadioGroup;


/**
 * Created by guan on 3/13/17.
 */

public class ServerSettingDialog extends Dialog {

    RadioGroup selectserver_radiogrp;
    DialogCallback callback;

    //这里定义了一些关于该Dialog的一些选项
    public enum SelectedServer {Lab, Aliyun}

    //构造函数
    public ServerSettingDialog(Context context) {
        super(context, R.style.Dialog_Dim);
        setCustomeDialog();

        //==========对Dialog窗体大小的设置========
        //设置dialog的宽度
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.width = (int) (AppConstant.SCRRENWIDTH * 0.8); //设置宽度
        getWindow().setAttributes(lp);
        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));
    }
    //构造函数
    public ServerSettingDialog(Context context, int themeResId) {
        super(context, themeResId);
        setCustomeDialog();
        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));
    }

    //构造函数
    protected ServerSettingDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
        setCustomeDialog();
        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));
    }


    public void setDialogCallback(DialogCallback callback) {
        this.callback = callback;
    }

    //具体设置该Dialog
    private void setCustomeDialog() {
        View mView = LayoutInflater.from(getContext()).inflate(R.layout.dialog_selectserver, null);
        selectserver_radiogrp = (RadioGroup) mView.findViewById(R.id.selectserver_radiogrp);

        //这一部分代码表示具体要做的事.....
        selectserver_radiogrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId) {
                    case R.id.labserver_radiobtn:
                        callback.onClickRadioButton(SelectedServer.Lab);
                        break;
                    case R.id.aliyunserver_radiobtn:
                        callback.onClickRadioButton(SelectedServer.Aliyun);
                        break;
                }
                ServerSettingDialog.this.dismiss();
            }
        });

        super.setContentView(mView);

    }

    //自定义的，关于该Dialog的回调接口
    public interface DialogCallback {

        void onClickRadioButton(SelectedServer s);

    }

}

4. 使用Dialog

                ServerSettingDialog dialog = new ServerSettingDialog(mContext);
                dialog.setCanceledOnTouchOutside(true);//触摸dialog以外的区域，dialog会消失
                //设置Dialog的回调函数
                dialog.setDialogCallback(new ServerSettingDialog.DialogCallback() {
                    //根据不同的选择，做出不同的动作
                    @Override
                    public void onClickRadioButton(ServerSettingDialog.SelectedServer s) {
                        if (s == ServerSettingDialog.SelectedServer.Lab) {
                            //balabala
                        } else if (s == ServerSettingDialog.SelectedServer.Aliyun) {
                            //balabala
                        }

                    }
                });
                //添加Dialog消失时的listener
                dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface dialog) {
                        showSelectedServerOnActivity();
                    }
                });
                //显示该Dialog，不要忘记
                dialog.show();

抓住Demo一只：

为了方便以后调用，本人已经将上述Dialog封装到了.aar文件中。以后调用时，只需要导入第三方包即可。

https://github.com/shanxu100/GUtils

欢迎大家补充交流。