Android Studio基础使用自定义对话框

Posted 2022-12-03 徐为波

android Studio基础使用自定义对话框

兼容低版本的APP运行

第一步：新建新的空白activity，布局XML设置如下

该APP的启动界面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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_single"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示单选对话框"/>
    <Button
        android:id="@+id/btn_alert_customer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="自定义对话框"/>

</LinearLayout>

自定义的对话框item_alert_dialog的布局XML设置

<?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"
    tools:context=".MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="自定义Dialog界面!"
        />
    <TextView
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:background="@mipmap/ic_launcher"/>

</LinearLayout>

第二步：在MainActivity.java中绑定布局xml

第三步：对话框实现抽象方式

package com.xwb.zdydhk;

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

import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener 

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn_single = findViewById(R.id.btn_single);
        btn_single.setOnClickListener(this);
        Button btn_alert_customer = findViewById(R.id.btn_alert_customer);
        btn_alert_customer.setOnClickListener(this);
    
    @Override
    public void onClick(View v)
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        switch (v.getId())
            case R.id.btn_single:
                builder.setTitle("单选对话框").setIcon(R.mipmap.ic_launcher).setSingleChoiceItems(new String[]"中国", "德国", "日本", 0, new DialogInterface.OnClickListener() 
                    @Override
                    public void onClick(DialogInterface dialog, int which) 
                        Toast.makeText(MainActivity.this,"选中的"+which,Toast.LENGTH_SHORT).show();
                    
                );
                break;
            case R.id.btn_alert_customer:
                //setView(R.layout.item_alert_dialog)为自定义的对话框，或图片等等
                builder.setTitle("自定义对话框").setIcon(R.mipmap.ic_launcher).setView(R.layout.item_alert_dialog);
                break;
            
        AlertDialog ad = builder.create();
        ad.show();
    

第四步：运行APP效果