自定义按钮的实现，很多自定义的控件都可以以类似的方式实现。比较简单

 public class SampleDialog extends Dialog {
    @BindView(R.id.content)
    TextView contextTxt;
    @BindView(R.id.title)
    TextView titleTxt;
    @BindView(R.id.submit)
    TextView submitTxt;
    @BindView(R.id.cancel)
    TextView cancelTxt;

    private Context mContext;
    private String content;//提示内容
    private OnCloseListener listener;//按钮监听
    private String positiveName;//确认文本
    private String negativeName;//取消文本
    private String title;//标题

    //Dialog本身的构造函数就不添加了，实现的时候需补上，这里放上需要的构造函数
    public SampleDialog(Context context, int themeResId, String content, OnCloseListener listener) {
        super(context, themeResId);
        this.mContext = context;
        this.content = content;
        this.listener = listener;
    }

    //设置标题
    public SampleDialog setTitle(String title){
        this.title = title;
        return this;
    }

   //设置确认文本
    public SampleDialog setPositiveButton(String name){
        this.positiveName = name;
        return this;
    }

 //设置取消文本
    public SampleDialog setNegativeButton(String name){
        this.negativeName = name;
        return this;
    }

     //设置确认点击事件
    @OnClick(R.id.submit)
    void clickSubmit(){
        if(listener != null){
            listener.onClick(this, true);
        }
        this.dismiss();
    }

  //设置确认取消点击事件
    @OnClick(R.id.cancel)
    void clickCancel(){
        if(listener != null){
            listener.onClick(this,false);
        }
        this.dismiss();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_commom);//设置dialog，具体的样式请随意发挥，只需保证有4个控件，标题，内容文本，确认按钮，取消按钮
        setCanceledOnTouchOutside(false);
        ButterKnife.bind(this);
        initView();
    }

    //初始化文本
    private void initView(){
        contextTxt.setText(content);
        if(!TextUtils.isEmpty(positiveName)){
            submitTxt.setText(positiveName);
        }

        if(!TextUtils.isEmpty(negativeName)){
            cancelTxt.setText(negativeName);
        }

        if(!TextUtils.isEmpty(title)){
            titleTxt.setText(title);
        }

    }

  //接口，需在实际使用中实现
    public interface OnCloseListener{
        void onClick(Dialog dialog, boolean confirm);
    }
}

实现的例子

SampleDialog dialog2 = new SampleDialog(xxxActivity.this,R.style.dialog, "hello world", new SampleDialog.OnCloseListener() {
                    @Override
                    public void onClick(Dialog dialog, boolean confirm) {
                        if(confirm){
                            //DO YES
                        }else{
                            //DO NO
                            dialog.dismiss();//关闭dialog
                        }
                    }
                });
                dialog2.setPositiveButton("是!");
                dialog2.setNegativeButton("我点错啦！");
                dialog2.show();

补充两个内容，dialog的THEME，以及 animation 效果
values/styles.xml

<style name="dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <!--边框-->
        <item name="android:windowIsFloating">true</item>
        <!--是否浮现在activity之上-->
        <item name="android:windowIsTranslucent">false</item>
        <!--半透明-->
        <item name="android:windowNoTitle">true</item>
        <!--无标题-->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!--背景透明-->
        <item name="android:backgroundDimEnabled">true</item>
        <!--模糊-->

    </style>


    <style name="dialogWindowAnim" mce_bogus="1" parent="android:Animation">
        <item name="android:windowEnterAnimation">@anim/dialog_enter_anim</item>
        <item name="android:windowExitAnimation">@anim/dialog_exit_anim</item>
    </style>

动画
动画：1 anim/dialog_enter_anim

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="200"
        android:fromYDelta="100%p"
        android:toYDelta="0" />
    <alpha
        android:duration="200"
        android:fromAlpha="0.0"
        android:toAlpha="1.0" />
</set>

动画:2 anim/dialog_exit_anim

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="200"
        android:fromYDelta="0"
        android:toYDelta="50%p" />
    <alpha
        android:duration="200"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>