Android开发AlertDialog详解

一、效果 展示

在这里插入图片描述

二、源码

package com.example.learning01;

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

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

public class MainActivity extends AppCompatActivity {

    private static final String TAG ="MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


    }

    public void dialog_show(View view) {
        final View dialogView = getLayoutInflater().inflate(R.layout.dialog,null);


        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setIcon(R.drawable.ic_baseline_arrow_back_24)
                .setTitle("Dialog")
                .setMessage("你好吗")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Log.e(TAG, "onClick: "+"确定" );
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Log.e(TAG, "onClick: "+"取消" );
                    }
                })
                .setNeutralButton("中间", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Log.e(TAG, "onClick: "+"中间" );
                    }
                })
                .setView(dialogView)
                .setCancelable(false)
                .create()
                .show();

    }
}

activity _main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity"
    android:padding="10dp">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="alertDialog"
        android:onClick="dialog_show"/>

</LinearLayout>

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:background="#ff0000"
    android:orientation="horizontal">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_baseline_arrow_back_24"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="dsdsfsfsdfsdf"/>

</LinearLayout>