对话框(用Activity实现)

  布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/ll_root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/dp_15"
    android:paddingRight="@dimen/dp_15"
    android:gravity="center"
    android:orientation="vertical">

    <!--<android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        card_view:cardCornerRadius="5dp"
        card_view:cardUseCompatPadding="true"
        card_view:cardElevation="@dimen/dp_0"
        android:layout_marginLeft="@dimen/dp_15"
        android:layout_marginRight="@dimen/dp_15">-->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:background="@drawable/shape_assistant_bg">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@drawable/bangding_bg_bz"
                android:gravity="center"
                android:text="斑马使用助手"
                android:textColor="@color/white"
                android:textSize="@dimen/sp_16" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/dp_35"
                android:layout_marginRight="@dimen/dp_35"
                android:layout_marginTop="@dimen/dp_25"
                android:text="@string/chejiahao_introduce"
                android:textColor="#999999" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/dp_35"
                android:layout_marginTop="@dimen/dp_20"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="例如："
                    android:textColor="#666666" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="LSJB36766GS000000"
                    android:textColor="#00b3a8" />
            </LinearLayout>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/dp_35"
                android:layout_marginRight="@dimen/dp_35"
                android:layout_marginTop="@dimen/dp_40"
                android:text="发动机号:发动机号可联系销售经理获取发票/行驶证/合格证上查看"
                android:textColor="#999999" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/dp_48"
                android:layout_marginLeft="@dimen/dp_35"
                android:layout_marginTop="@dimen/dp_20"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="例如："
                    android:textColor="#666666" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="LSJB36766GS000000"
                    android:textColor="#00b3a8" />

            </LinearLayout>
        </LinearLayout>

        <!--<LinearLayout-->
        <!--android:layout_width="match_parent"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:layout_gravity="bottom"-->
        <!--android:layout_marginTop="@dimen/dp_48"-->
        <!--android:gravity="center_horizontal"-->
        <!--android:orientation="vertical">-->

        <!---->
        <!--</LinearLayout>-->
    </LinearLayout>

    <!--</android.support.v7.widget.CardView>-->

    <View
        android:layout_width="@dimen/dp_1"
        android:layout_height="@dimen/dp_50"
        android:layout_gravity="center_horizontal"
        android:background="@color/white" />

    <ImageView
        android:id="@+id/iv_close"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:src="@drawable/bangding_icon_bz_guanbi_nor" />
</LinearLayout>

  Activity:

package com.saicmotor.mine.activity;

import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.saicmotor.R;
import com.saicmotor.library.activity.base.BaseActivity;

public class UseAssistantActivity extends BaseActivity{

    private ImageView iv_close;
    private LinearLayout ll_root;

    @Override
    protected void setUpView() {
        iv_close = $(R.id.iv_close);
        ll_root = $(R.id.ll_root);
    }

    @Override
    protected int setLayoutResourceID() {
        return R.layout.activity_use_assistant;
    }

    @Override
    protected void initListeners() {
        super.initListeners();
        iv_close.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                getWindow().setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.transparent)));
//                ll_root.setVisibility(View.GONE);
//                finish();
                finish();
            }
        });
    }

    @Override
    public void finish() {
        super.finish();
        //参数一：Activity1进入动画，参数二：Activity2退出动画
        overridePendingTransition(R.anim.activity_open, R.anim.activity_close);
    }
}

Activity设置主题半透明

<style name="Transparent" parent="AppTheme">
    <item name="android:windowBackground">@color/transparent2</item>
    <item name="android:windowIsTranslucent">true</item>
    <!--<item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>-->
</style>