Flutter弹窗提示插件popup_alert的使用

Flutter弹窗提示插件popup_alert的使用

本插件允许你在你的Flutter应用中从Java代码展示警告对话框。

开始使用

要使用此插件，你需要在pubspec.yaml文件中添加以下依赖：

dependencies:
  flutter_alert_dialog: ^latest_version

然后运行：

flutter pub get

使用方法

要展示一个警告对话框，你可以调用showAlertDialog方法：

import 'package:flutter_alert_dialog/flutter_alert_dialog.dart';

void showAlertDialog(BuildContext context) {
  const channel = MethodChannel('flutter_alert_dialog');
  channel.invokeMethod('showAlertDialog', {
    'title': 'My Custom Title',
    'message': 'This is a custom message',
  });
}

这将展示一个带有标题"My Custom Title"和消息"This is a custom message"的警告对话框。对话框将有两个按钮：“OK” 和 “Cancel”。

你还可以通过传递一个Map类型的选项来定制警告对话框的标题、消息和按钮。

示例代码

以下是一个如何使用flutter_alert_dialog插件展示警告对话框的示例：

import 'package:flutter/material.dart';
import 'package:flutter_alert_dialog/flutter_alert_dialog.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter AlertDialog Plugin Example'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: () {
              showAlertDialog(context);
            },
            child: Text('Show Alert Dialog'),
          ),
        ),
      ),
    );
  }

  void showAlertDialog(BuildContext context) {
    const channel = MethodChannel('flutter_alert_dialog');
    channel.invokeMethod('showAlertDialog', {
      'title': 'My Custom Title',
      'message': 'This is a custom message',
    });
  }
}

这个示例将展示一个带有标题"My Custom Title"和消息"This is a custom message"的警告对话框。对话框将有两个按钮：“OK” 和 “Cancel”。

Java代码

以下是FlutterAlertDialogPlugin插件的Java代码：

package com.example.flutter_alert_dialog;

import android.app.Dialog;
import android.content.Context;
import androidx.appcompat.app.AlertDialog;
import android.content.DialogInterface;
import android.widget.Toast;

import androidx.annotation.NonNull;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;

/** FlutterAlertDialogPlugin */
public class FlutterAlertDialogPlugin implements FlutterPlugin, MethodCallHandler {
  private MethodChannel channel;
  private Context context;

  [@Override](/user/Override)
  public void onAttachedToEngine([@NonNull](/user/NonNull) FlutterPluginBinding flutterPluginBinding) {
    context = flutterPluginBinding.getApplicationContext();
    channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "flutter_alert_dialog");
    channel.setMethodCallHandler(this);
  }

  [@Override](/user/Override)
  public void onMethodCall([@NonNull](/user/NonNull) MethodCall call, [@NonNull](/user/NonNull) Result result) {
    if (call.method.equals("getPlatformVersion")) {
      result.success("Android " + android.os.Build.VERSION.RELEASE);
    } else if(call.method.equalsIgnoreCase("showAlertDialog")) {
        String title = call.argument("title");
        String message = call.argument("message");
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle(title);
        builder.setMessage(message);
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            [@Override](/user/Override)
            public void onClick(DialogInterface dialog, int which) {
                // 处理点击"OK"按钮的操作。
            }
        });
        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            [@Override](/user/Override)
            public void onClick(DialogInterface dialog, int which) {
                // 处理点击"Cancel"按钮的操作。
            }
        });
        AlertDialog dialog = builder.create();
        dialog.show();
    } else {
      result.notImplemented();
    }
  }

  [@Override](/user/Override)
  public void onDetachedFromEngine([@NonNull](/user/NonNull) FlutterPluginBinding binding) {
    channel.setMethodCallHandler(null);
  }
}