自定义Dialog布局的弹窗功能的简单实现

package com.loaderman.dialogdemo;

import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.tv).setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                //长按显示弹窗
                showDialog();
                return true;
            }
        });
    }
    //显示弹窗
    private void showDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        //自定义dialog的布局
        View view = View.inflate(this, R.layout.item_dialog, null);
        //设置View
        builder.setView(view);
        //根据builder设置好的一系列数据, 来构建一个dialog对象
        final AlertDialog dialog = builder.create();
        //删除点击事件
        view.findViewById(R.id.tv_delete).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "点击了删除", Toast.LENGTH_SHORT).show();
                //弹窗消失
                dialog.dismiss();
            }
        });
        //置顶点击事件
        view.findViewById(R.id.tv_top).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "点击了置顶", Toast.LENGTH_SHORT).show();
                //弹窗消失
                dialog.dismiss();
            }
        });
        //builder.show();
        dialog.show();
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.loaderman.dialogdemo.MainActivity">

    <TextView
        android:background="#ccc"
        android:id="@+id/tv"
        android:textColor="#f00"
        android:textSize="18sp"
        android:gravity="center"
        android:layout_width="match_parent"
        android:padding="10dp"
        android:layout_height="wrap_content"
        android:text="长按我,看效果" />
</RelativeLayout>

item_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <TextView
        android:id="@+id/tv_delete"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="点我删除"
        android:textSize="14sp"/>

    <TextView
        android:id="@+id/tv_top"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="点我置顶"
        android:textSize="14sp"/>
</LinearLayout>

效果图: