1.进入页面注册广播事件。

1.进入页面注册广播。
created: function(option) {
	this.initScan();
	this.startScan();
},





2.点击扫描接收广播特定消息。
openScan()
{
try {
let Intent = plus.android.importClass('android.content.Intent');
let context = plus.android.runtimeMainActivity();
// let intent = new Intent('android.intent.action.SCAN_KEY.down');
let intent = new Intent('com.example.decodeTest.start');
context.sendBroadcast(intent);
} catch (e) {
console.error('Error sending broadcast:', e);
}
},

2.点击扫描接收广播特定消息。

3.完整代码，关注 AI创造财富 公众号！DeepSkai - 智能未来

<template>
	<view class="content"></view>
</template>

<script>

var main, receiver, filter;
var _codeQueryTag = false;

const ab2str = function (buf) {
  return String.fromCharCode.apply(null, new Uint8Array(buf));
}

export default {
    name:"scan",
	data() {
		return {
		};
	},
	created: function(option) {
		this.initScan();
		this.startScan();
	},
	onHide: function() {
		this.stopScan();
	},
	destroyed: function() {
		/*页面退出时一定要卸载监听,否则下次进来时会重复，造成扫一次出2个以上的结果*/
		this.stopScan();
	},
	methods: {
		openScanner() {
		      uni.scanCode({
		        success: (res) => {
		          console.log(res);
		          // 处理扫码成功后的逻辑
		        },
		        fail: (err) => {
		          console.error(err);
		          // 处理扫码失败后的逻辑
		        }
		      });
		},
		
		openScan()
		{
			try {
				let Intent = plus.android.importClass('android.content.Intent');
				let context = plus.android.runtimeMainActivity();
				// let intent = new Intent('android.intent.action.SCAN_KEY.down');
				let intent = new Intent('com.example.decodeTest.start');
				context.sendBroadcast(intent);
			} catch (e) {
				console.error('Error sending broadcast:', e);
			}
		},
		initScan() {
		    console.log("执行initScan");
		    let _this = this;
		    main = plus.android.runtimeMainActivity();
		    var IntentFilter = plus.android.importClass('android.content.IntentFilter');
		    filter = new IntentFilter();
		    filter.addAction('com.kte.scan.result');  
		    console.log("filter created: ", filter);
		    receiver = plus.android.implements('io.dcloud.feature.internal.reflect.BroadcastReceiver', {
		    onReceive: function(context, intent) {
				console.log("执行receiver, Action: ", intent.getAction()); 
				// 1. 获取字节数组 byte[]
				let bdata = plus.android.invoke(intent, 'getByteArrayExtra', 'code_src');
				if (!bdata || bdata.length === 0) {
					console.log("字节数组为空或无效");
					return;
				}
		
				// 2. 将 byte[] 转成 Hex 字符串（可选，用于调试）
				let hexString = Array.from(bdata).map(b => {
					return ('0' + (b & 0xFF).toString(16)).slice(-2).toUpperCase();
				}).join(' ');
				
				console.log("Hex 数据:", hexString);
		
				// 3. 将 byte[] 转成字符串（需指定编码，如 UTF-8）
				
				// 1. 将 Hex 字符串转为 byte[]
				let hexArray = hexString.trim().split(' ');
				let byteArray = hexArray.map(hex => parseInt(hex, 16));
				
				// 2. 在 UniApp 中调用 Java 的 GB2312 解码
				let strResult;
				try {
				    let StringClass = plus.android.importClass('java.lang.String');
					let javaString = plus.android.newObject(StringClass, byteArray, 'GB2312');
					
					// 方法1：调用 toString() 并提取内容（兼容 UniApp）
					let strResult = plus.android.invoke(javaString, 'toString');
					console.log("解码结果:", strResult); // 应输出 "https://deepskai.cn/"
					
					// 方法2（备用）：如果方法1无效，直接转为 JS 字符串
					if (typeof strResult === 'object') {
						strResult = String.fromCharCode(...byteArray); // 直接通过 ASCII 码转换
						console.log("备用解码结果:", strResult);
					}
					_this.queryCode(strResult);
	
				} catch (e) {
				    console.error("解码失败:", e);
				}
				
			}
			
			});     
		},
		
		startScan() {
			main.registerReceiver(receiver, filter);
		},
		stopScan() {
			main.unregisterReceiver(receiver);
		},
		queryCode: function(code) {
			//防重复
			if (_codeQueryTag) return false;
			_codeQueryTag = true;
			setTimeout(function() {
				_codeQueryTag = false;
			}, 350);
			const value = code;
			uni.$emit('newbarcode', { code: value });
		}
	}
};

</script>
<style></style>