<style name="MessageListDialog" parent="@android:style/Theme.Dialog"><item name="android:windowIsFloating">true</item><item name="android:windowFullscreen">true</item><item name="android:windowIsTranslucent">false</item><item name="android:windowBackground">@android:color/transparent</item><!-- 无标题 --><item name="android:windowNoTitle">true</item><!-- 背景透明 --><item name="android:backgroundDimEnabled">true</item><item name="android:textColor">@color/black</item></style>

样式大家可以看着酌量增减。
2.以下为自定义dialog的精华，大家品味以下。0.0

import android.app.Dialog;
import android.content.Context;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import com.fujitsu.R;
import com.fujitsu.adapter.Dialog_ChooseUserAdapter;import java.util.ArrayList;
import java.util.HashMap;/*** Created by Administrator on 2016/9/29.*/
public class Dialog_ChooseUser extends Dialog implements AdapterView.OnItemClickListener{private Context context;private ListView listview;private ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();private OnTextInputFinishedListener mListener; //接口@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {mListener.editInputFinished(list.get(position));dismiss();}public interface OnTextInputFinishedListener{void editInputFinished(HashMap<String, String> user);}public Dialog_ChooseUser(Context context, int theme, OnTextInputFinishedListener mListener) {super(context, theme);this.context = context;this.mListener = mListener;this.setCancelable(true);initView();initData();}private void initData() {HashMap<String, String> map = new HashMap<>();map.put("name","kate");map.put("password","1");HashMap<String, String> map1 = new HashMap<>();map1.put("name","john");map1.put("password","1");HashMap<String, String> map2 = new HashMap<>();map2.put("name","ming");map2.put("password","1");HashMap<String, String> map3 = new HashMap<>();map3.put("name","hirorin");map3.put("password","1");list.add(map);list.add(map1);list.add(map2);list.add(map3);Dialog_ChooseUserAdapter adapter = new Dialog_ChooseUserAdapter(context, list);listview.setAdapter(adapter);listview.setOnItemClickListener(this);}private void initView() {setContentView(R.layout.dialog_chooseuser);listview = (ListView) findViewById(R.id.dialog_chooseuser_listview);}}

里面的Dialog_ChooseUserAdapter相信不用给大家介绍了吧？不知道的可以另行搜索BaseAdapter的使用！欧耶！
其中的精华为：

private OnTextInputFinishedListener mListener; //接口

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {mListener.editInputFinished(list.get(position));
    dismiss();   //当点击以后关闭弹出框
}public interface OnTextInputFinishedListener{void editInputFinished(HashMap<String, String> user);
}

3.再献上dialog中布局的代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><LinearLayoutandroid:layout_width="400dp"android:layout_height="300dp"android:orientation="vertical"android:background="@drawable/shap_dialog_white"android:gravity="center"><TextViewandroid:layout_width="match_parent"android:layout_height="50dp"android:text="选择用户"android:textSize="25sp"android:gravity="center"android:textColor="@color/black"/><ListViewandroid:id="@+id/dialog_chooseuser_listview"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_gravity="center"android:listSelector="#00000000"></ListView></LinearLayout>
</LinearLayout>

4.当要调用的时候，直接来这一句：

                Dialog_ChooseUser dialog = new Dialog_ChooseUser(LoginActivity.this,R.style.MessageListDialog, new Dialog_ChooseUser.OnTextInputFinishedListener() {@Overridepublic void editInputFinished(HashMap<String, String> user) {etLoginName.setText(user.get("name"));etPassword.setText(user.get("password"));}});// 创建Dialog并设置样式主题dialog.show();dialog.getWindow().setGravity(Gravity.CENTER);

注意：顺序是这样的！不然容易出来一个顺序错乱异常！

       dialog.show();dialog.getWindow().setGravity(Gravity.CENTER);

其中

R.style.MessageListDialog

就是你前面定义的style！

结束，谢谢大家观看，打赏个或者点个赞呗亲！