最新实现了一个自定义Dialog的需求,先看看效果图:

android单选框view android单选dialog_自定义

android单选框view android单选dialog_android单选框view_02

下面说说如何实现:

首先需要自定义一个Dialog类,继承自android.app.Dialog类。这个Dialog类就是要显示的对话框,包含双选按钮和单选按钮两种效果。本例中自定义CustomDialog类的代码先贴上:

package example.lwc.com.demo2;

import android.app.Dialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CustomDialog extends Dialog {

    public CustomDialog(Context context) {
        super(context);
    }
    public CustomDialog(Context context, int theme) {
        super(context, theme);
    }

    public static class Builder {
        private String message;
        private View contentView;
        private String positiveButtonText;
        private String negativeButtonText;
        private String singleButtonText;
        private View.OnClickListener positiveButtonClickListener;
        private View.OnClickListener negativeButtonClickListener;
        private View.OnClickListener singleButtonClickListener;

        private View layout;
        private CustomDialog dialog;
        public Builder(Context context) {
            //这里传入自定义的style,直接影响此Dialog的显示效果。style具体实现见style.xml
            dialog = new CustomDialog(context, R.style.Dialog);     
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            layout = inflater.inflate(R.layout.dialog_layout, null);
            dialog.addContentView(layout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        }

        public Builder setMessage(String message) {
            this.message = message;
            return this;
        }

        public Builder setContentView(View v) {
            this.contentView = v;
            return this;
        }

        public Builder setPositiveButton(String positiveButtonText, View.OnClickListener listener) {
            this.positiveButtonText = positiveButtonText;
            this.positiveButtonClickListener = listener;
            return this;
        }

        public Builder setNegativeButton(String negativeButtonText, View.OnClickListener listener) {
            this.negativeButtonText = negativeButtonText;
            this.negativeButtonClickListener = listener;
            return this;
        }

        public Builder setSingleButton(String singleButtonText, View.OnClickListener listener) {
            this.singleButtonText = singleButtonText;
            this.singleButtonClickListener = listener;
            return this;
        }

        /**
         * 创建单按钮对话框
         * @return
         */
        public CustomDialog createSingleButtonDialog() {
            showSingleButton();
            layout.findViewById(R.id.singleButton).setOnClickListener(singleButtonClickListener);
            //如果传入的按钮文字为空,则使用默认的“返回”
            if (singleButtonText != null) {
                ((Button) layout.findViewById(R.id.singleButton)).setText(singleButtonText);
            } else {
                ((Button) layout.findViewById(R.id.singleButton)).setText("返回");
            }
            create();
            return dialog;
        }

        /**
         * 创建双按钮对话框
         * @return
         */
        public CustomDialog createTwoButtonDialog() {
            showTwoButton();
            layout.findViewById(R.id.positiveButton).setOnClickListener(positiveButtonClickListener);
            layout.findViewById(R.id.negativeButton).setOnClickListener(negativeButtonClickListener);
            //如果传入的按钮文字为空,则使用默认的“是”和“否”
            if (positiveButtonText != null) {
                ((Button) layout.findViewById(R.id.positiveButton)).setText(positiveButtonText);
            } else {
                ((Button) layout.findViewById(R.id.positiveButton)).setText("是");
            }
            if (negativeButtonText != null) {
                ((Button) layout.findViewById(R.id.negativeButton)).setText(negativeButtonText);
            } else {
                ((Button) layout.findViewById(R.id.negativeButton)).setText("否");
            }
            create();
            return dialog;
        }

        /**
         * 单按钮对话框和双按钮对话框的公共部分在这里设置
         */
        private void create() {
            if (message != null) {      //设置提示内容
                ((TextView) layout.findViewById(R.id.message)).setText(message);
            } else if (contentView != null) {       //如果使用Builder的setContentview()方法传入了布局,则使用传入的布局
                ((LinearLayout) layout.findViewById(R.id.content)).removeAllViews();
                ((LinearLayout) layout.findViewById(R.id.content))
                        .addView(contentView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
            }
            dialog.setContentView(layout);
            dialog.setCancelable(true);     //用户可以点击手机Back键取消对话框显示
            dialog.setCanceledOnTouchOutside(false);        //用户不能通过点击对话框之外的地方取消对话框显示
        }

        /**
         * 显示双按钮布局,隐藏单按钮
         */
        private void showTwoButton() {
            layout.findViewById(R.id.singleButtonLayout).setVisibility(View.GONE);
            layout.findViewById(R.id.twoButtonLayout).setVisibility(View.VISIBLE);
        }

        /**
         * 显示单按钮布局,隐藏双按钮
         */
        private void showSingleButton() {
            layout.findViewById(R.id.singleButtonLayout).setVisibility(View.VISIBLE);
            layout.findViewById(R.id.twoButtonLayout).setVisibility(View.GONE);
        }

    }
}

Dialog所用的布局文件dialog_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"
    android:orientation="vertical"
    android:paddingTop="120dp"
    android:paddingBottom="120dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="230dp"
        android:layout_gravity="center"
        android:background="@drawable/dialog_bg_biggg"
        android:padding="40dp"
        android:orientation="vertical" >

        <LinearLayout
            android:id="@+id/content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="40dp"
            android:gravity="center" >


            <TextView
                android:id="@+id/message"
                style="@style/text_16_666666"
                android:text="提示信息在这里"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="left|center"
                android:lineSpacingMultiplier="1.5"
                android:minHeight="50dp"
                android:paddingLeft="20dp"
                android:paddingRight="20dp" />
        </LinearLayout>

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <LinearLayout
                android:id="@+id/twoButtonLayout"
                android:visibility="visible"
                android:layout_width="match_parent"
                android:layout_height="60dp"
                android:layout_gravity="bottom"
                android:gravity="center"
                android:orientation="horizontal" >

                <Button
                    android:id="@+id/positiveButton"
                    style="@style/text_15_ffffff_sdw"
                    android:layout_width="0dp"
                    android:layout_weight="1"
                    android:layout_height="45dp"
                    android:background="@drawable/dialog_ok"
                    android:gravity="center" />

                <Button
                    android:id="@+id/negativeButton"
                    style="@style/text_15_666666_sdw"
                    android:layout_width="0dp"
                    android:layout_weight="1"
                    android:layout_height="45dp"
                    android:background="@drawable/dialog_cancel"
                    android:gravity="center" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/singleButtonLayout"
                android:visibility="visible"
                android:layout_width="match_parent"
                android:layout_height="60dp"
                android:layout_gravity="bottom"
                android:paddingLeft="50dp"
                android:paddingRight="50dp"
                android:paddingBottom="10dp"
                android:gravity="center">
                <Button
                    android:id="@+id/singleButton"
                    style="@style/text_15_ffffff_sdw"
                    android:layout_width="wrap_content"
                    android:layout_height="40dp"
                    android:background="@drawable/dialog_back"
                    android:gravity="center" />
            </LinearLayout>
        </FrameLayout>

    </LinearLayout>

</FrameLayout>

以及style.xml:

<resources>

    <style name="AppBaseTheme" parent="android:Theme.Light"></style>

    <style name="AppTheme" parent="AppBaseTheme"></style>

    <style name="text_18_ffffff">
        <item name="android:textSize">18.0dip</item>
        <item name="android:textColor">#777733</item>
    </style>

    <style name="text_16_666666">
        <item name="android:textSize">16.0dip</item>
        <item name="android:textColor">#ff666666</item>
    </style>

    <style name="sdw_white">
        <item name="android:shadowColor">#7fffffff</item>
        <item name="android:shadowDx">0.0</item>
        <item name="android:shadowDy">0.65</item>
        <item name="android:shadowRadius">1.0</item>
    </style>

    <style name="sdw_79351b">
        <item name="android:shadowColor">#ff79351b</item>
        <item name="android:shadowDx">0.0</item>
        <item name="android:shadowDy">1.0</item>
        <item name="android:shadowRadius">1.0</item>
    </style>

    <style name="text_15_ffffff_sdw" parent="@style/sdw_79351b">
        <item name="android:textSize">15.0dip</item>
        <item name="android:textColor">#ffffffff</item>
    </style>

    <style name="text_15_666666_sdw" parent="@style/sdw_white">
        <item name="android:textSize">15.0dip</item>
        <item name="android:textColor">#ff666666</item>
    </style>

    <style name="Dialog" parent="android:style/Theme.Dialog">
        <item name="android:background">#00000000</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">true</item>
    </style>
</resources>

在Android studio中,预览效果如下:

android单选框view android单选dialog_自定义_03

最后看看在Activity中如何调用:

1.先在Activity中定义一个Builder和一个CustomDialog实例:

private CustomDialog.Builder builder;
    private CustomDialog mDialog;

在onCreate()中初始化builder:

builder = new CustomDialog.Builder(this);

2.在MainActivity中定义两个方法,分别用于显示单按钮对话框和双按钮对话框:

private void showSingleButtonDialog(String alertText, String btnText, View.OnClickListener onClickListener) {
        mDialog = builder.setMessage(alertText)
                .setSingleButton(btnText, onClickListener)
                .createSingleButtonDialog();
        mDialog.show();
}
private void showTwoButtonDialog(String alertText, String confirmText, String cancelText, View.OnClickListener conFirmListener, View.OnClickListener cancelListener) {
        mDialog = builder.setMessage(alertText)
                .setPositiveButton(confirmText, conFirmListener)
                .setNegativeButton(cancelText, cancelListener)
                .createTwoButtonDialog();
        mDialog.show();
}

3.在需要用到的地方调用上面的两个方法即可,比如弹出双选按钮对话框,可以像下面这样调用:

showTwoButtonDialog("这是双选对话框的内容!", null, null, new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mDialog.dismiss();
            //这里写自定义处理XXX
        }
    }, new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mDialog.dismiss();
            //这里写自定义处理XXX
        }
    });

弹出单选按钮对话框,可以这样调用:

showSingleButtonDialog("这是单选对话框的内容!", null, new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mDialog.dismiss();
            //这里写自定义处理XXX
        }
    });

这里传入的按钮文字都为null,所以显示默认文字,结果就如开头的图所示。

另外谈一下自己的心得:
在自定义的CustomDialog类中,为什么要用一个静态内部类Builder呢?
因为对话框要设置的属性太多,包括各个按钮的文字,对话框内容,标题(本例中未实现标题),点击效果listener等。如果不用Builder,要创建一个自定义的Dialog,这些属性一般是要作为构造方法的参数传入的。但麻烦的是参数不固定,有些参数可传可不传,比如我们想new 一个单按钮对话框,那么双按钮的文字和Listener是不需要传入的。这样的话我们需要实现多个不同参数的构造方法,或者调用多次set方法设置属性。比起那样,像本例中这样用Builder就方便得多了,直观简洁:

mDialog = builder.setMessage(alertText)
            .setPositiveButton(confirmText, conFirmListener)
            .setNegativeButton(cancelText, cancelListener)
            .createTwoButtonDialog();