<template>
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<view class="bluetooth-printer">
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<button @click="connectPrinter">连接蓝牙打印机</button>
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<button @click="printTest">打印测试页</button>
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<text>{{ connectionStatus }}</text>
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</view>
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</template>
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<script>
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export default {
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props: ['printCmd'], // 从父组件传入的打印命令
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data() {
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return {
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bluetoothSocket: null,
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connectionStatus: '未连接'
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};
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},
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methods: {
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initBluetooth() {
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try {
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this.bluetoothSocket = plus.android.importClass("android.bluetooth.BluetoothSocket");
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plus.ui.toast("初始化蓝牙成功");
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} catch (e) {
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plus.ui.toast("初始化蓝牙失败：" + e);
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}
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},
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connectPrinter() {
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try {
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if (this.bluetoothSocket && !this.bluetoothSocket.isConnected()) {
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this.bluetoothSocket.connect();
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this.connectionStatus = "蓝牙打印机已连接";
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plus.ui.toast("打印机连接成功");
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} else {
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this.connectionStatus = "打印机已连接或连接中";
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}
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} catch (e) {
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this.connectionStatus = "连接失败";
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plus.ui.toast("连接失败：" + e);
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}
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},
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sendPrintCommand(cmd) {
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try {
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if (!this.bluetoothSocket || !this.bluetoothSocket.isConnected()) {
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plus.ui.toast("请先连接打印机");
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return;
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}
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const outputStream = this.bluetoothSocket.getOutputStream();
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plus.android.importClass(outputStream);
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const arrayBuffer = plus.android.invoke(cmd, "getBytes", "gbk");
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outputStream.write(arrayBuffer);
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outputStream.flush();
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plus.ui.toast("打印命令发送成功");
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} catch (e) {
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plus.ui.toast("打印命令发送失败：" + e);
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}
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},
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print() {
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if (this.printCmd) {
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this.sendPrintCommand(this.printCmd);
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}
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},
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printTest() {
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const testCmd = "! 0 203 203 490 1\r\nTEXT 24 0 100 100 测试打印\r\nPRINT\r\n";
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this.sendPrintCommand(testCmd);
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}
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},
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mounted() {
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this.initBluetooth();
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this.connectPrinter();
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this.print(); // 自动执行传入的打印命令
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}
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};
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</script>
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<style>
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/* 样式省略 */
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</style>
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