AlertLog（对话框）

AlertDialog.Builder builder = new AlertDialog.Builder(this) ：构建Dialog的各种参数
builder.setTitle(“对话框标题”) ：添加对话框标题
builder.setMessage(“内容”) ：添加对话框内容
builder.setView(inflate) ：设置自定义布局
builder.setPositiveButton(“确定”,new DialogInterface.OnClickListener() ：确定按钮
buildersetNegativeButton(“取消”, new DialogInterface.OnClickListener() ：取消按钮
builder.setNeutralButton(“中间”, new DialogInterface.OnClickListener() ：中间按钮
builder.create() ：创建Dialog
builder.show(); ：显示对话框

前端示例activity_main.xml

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

<Button<br />        android:layout_width="wrap_content"<br />        android:layout_height="wrap_content"<br />        android:text="设置"<br />        android:onClick="liu"<br />        /><br /></LinearLayout>

前端示例alert_dia_log_main.xml

<?xml version=”1.0” encoding=”utf-8”?>
android:layout_height=”match_parent”
xmlns:app=”http://schemas.android.com/apk/res-auto“
android:orientation=”vertical”
android:background=”@color/purple_200”
xmlns:android=”http://schemas.android.com/apk/res/android">

<ImageView<br />        android:layout_width="wrap_content"<br />        android:layout_height="wrap_content"<br />        android:src="@mipmap/ic_launcher"<br />        /><br />    <TextView<br />        android:layout_width="wrap_content"<br />        android:layout_height="wrap_content"<br />        android:text="背景"
    /><br /></LinearLayout>

后端示例

package com.example.myAlertDialog;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends AppCompatActivity {

@Override<br />    protected void onCreate(Bundle savedInstanceState) {<br />        super.onCreate(savedInstanceState);<br />        setContentView(R.layout._activity_main_);<br />    }
public void liu(View view) {<br />        View inflate = getLayoutInflater().inflate(R.layout._alert_dia_log_main_, null);<br />        AlertDialog.Builder builder = new AlertDialog.Builder(this);<br />        builder.setTitle("对话框标题")<br />                .setMessage("内容")<br />                .setView(inflate)<br />                .setPositiveButton("确定",new DialogInterface.OnClickListener(){<br />            @Override<br />            public void onClick(DialogInterface dialogInterface, int i) {<br />                Log._e_("beleth","点击了 确定 Onclick");<br />            }<br />        }).setNegativeButton("取消", new DialogInterface.OnClickListener() {<br />            @Override<br />            public void onClick(DialogInterface dialogInterface, int i) {<br />                Log._e_("beleth","点击了 取消 Onclick");<br />            }<br />        }).setNeutralButton("中间", new DialogInterface.OnClickListener() {<br />            @Override<br />            public void onClick(DialogInterface dialogInterface, int i) {<br />                Log._e_("beleth","点击了 中间 Onclick");<br />            }<br />        }).create().show();<br />    }<br />}