Android扫描二维码信息

调用华为的scanplus库做二维码扫描

1.在项目的build.gradle文件中添加华为的maven开发库地址，文件内容如下。buildscript 和allprojects 节点的repositories 节点内都添加了。

maven {url 'http://developer.huawei.com/repo/'}

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {repositories {google()jcenter()maven {url 'http://developer.huawei.com/repo/'}}dependencies {classpath 'com.android.tools.build:gradle:3.5.2'// NOTE: Do not place your application dependencies here; they belong// in the individual module build.gradle files}
}def releaseTime() {return new Date().format("yyyy-MM-dd",java.util.TimeZone.getTimeZone("UTC"))
}allprojects {repositories {google()jcenter()maven { url 'https://jitpack.io' }maven { url 'http://developer.huawei.com/repo/'}}ext {compileSdkVersion = 30buildToolsVersion = "30.0.3"minSdkVersion = 19targetSdkVersion = 30}
}task clean(type: Delete) {delete rootProject.buildDir
}

2.app的build.gradle文件中添加库的依赖，文件内容如下，文件中的其他部分省略了。

implementation 'com.huawei.hms:scanplus:1.1.1.301'

apply plugin: 'com.android.application'android {...
}dependencies {implementation fileTree(dir: 'libs', include: ['*.jar'])...//implementation project(path: ':Venus')api 'com.gitee.premeditate:VenusAndroid:V1.0.22'//二维码扫描库implementation 'com.huawei.hms:scanplus:1.1.1.301'
}

3.在AndroidManifest.xml清单文件中声明扫描二维码的Activity和相关权限，文件内容如下。无关的内容省略。

<activity android:name="com.huawei.hms.hmsscankit.ScanKitActivity" />

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.venus.mpeqi"><!--相机权限--><uses-permission android:name="android.permission.CAMERA" /><!--读文件权限--><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><!--使用特性--><uses-feature android:name="android.hardware.camera" /><uses-feature android:name="android.hardware.camera.autofocus" /><applicationandroid:name="org.venus.library.app.LibraryApplication"android:allowBackup="true"android:icon="@drawable/icon_app"android:label="@string/app_name"android:roundIcon="@drawable/icon_app"android:supportsRtl="true"android:theme="@style/NoTitleBar"><activityandroid:name=".ui.activity.LoginActivity"android:screenOrientation="userLandscape"android:windowSoftInputMode="stateHidden"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><!--对扫码页面进行声明--><activity android:name="com.huawei.hms.hmsscankit.ScanKitActivity" /></application></manifest>

4.在调用扫码功能处按照如下函数执行

调用事件

扫码功能的按钮点击事件，在这里去申请扫码权限

/*** 扫描二维码*/
private void scan() {requestPermission(CAMERA_REQ_CODE, 1);
}

请求权限

笔者在这里不调用动态申请权限。在设备中手动允许应用的相机权限但是仍不能扫码，所以这里必须动态申请一次相机权限。

private void requestPermission(int requestCode, int mode) {ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE}, requestCode);
}

请求权限结果

权限请求结果，如果拒绝权限就不能继续执行，允许权限就可以启动扫码界面进行扫码。

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {if (permissions == null || grantResults == null) {return;}if (grantResults.length < 2 || grantResults[0] != PackageManager.PERMISSION_GRANTED || grantResults[1] != PackageManager.PERMISSION_GRANTED) {return;}if (requestCode == CAMERA_REQ_CODE) {ScanUtil.startScan(this, REQUEST_CODE_SCAN_ONE, new HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.QRCODE_SCAN_TYPE).create());}
}

扫码结果

扫码结果拿到的是HmsScan对象，通过打印可以看到二维码的基本数据大概是如下结构的。可以通过HmsScan对象的originalValue属性拿到二维码的主要信息进行业务处理，如果扫描的二维码与你的业务无关，可以做个简易的提示并不处理这次扫描，如果是你系统的信息就执行你的业务。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode != RESULT_OK || data == null) {return;}if (requestCode == REQUEST_CODE_SCAN_ONE) {HmsScan obj = data.getParcelableExtra(ScanUtil.RESULT);
//            System.out.println(new Gson().toJson(obj));System.out.println(obj.originalValue);try {QRCode qrCode = new Gson().fromJson(obj.originalValue, QRCode.class);if (!QRCode.TITLE_DEFAULT.equals(qrCode.title)) {ToastUtil.show(this, "二维码标识信息不正确");return;}queryEquipmentInfoByNumber(qrCode.number);} catch (Exception e) {ToastUtil.show(this, "请扫描移动便携设备二维码");}}
}

二维码数据结构

{"HMS_SCAN_VERSION": 3,"cornerPoints": [{"x": 691,"y": 1080},{"x": 328,"y": 855},{"x": 544,"y": 492},{"x": 915,"y": 715}],"linkUrl": {"linkvalue": "https://u.wechat.com/EDTLAmRNzshSMzp21uQ4kBM","theme": ""},"originValueByte": [66,-58,-121,71,71,7,51,-94,-14,-9,82,-25,118,86,54,-122,23,66,-26,54,-10,-46,-12,84,69,68,-60,22,-43,36,-25,-89,54,-123,52,-41,-89,3,35,23,85,19,70,-76,36,-48],"originalValue": "https://u.wechat.com/EDTLAmRNzshSMzp21uQ4kBM","scanType": 1,"scanTypeForm": 1006,"showResult": "https://u.wechat.com/EDTLAmRNzshSMzp21uQ4kBM","zoomValue": 0.0
}

业务

拿到扫描结果后执行你自己的业务

private void queryEquipmentInfoByNumber(String number) {Common.queryEquipmentByNumber(this,number);
}

5.截图

这是程序界面，点击右上角的扫码按钮，执行扫码函数

Screenshot_20220421_101019_org.venus.mpeqi.jpg

扫码界面，如果是第一次扫码会提示申请权限，选择允许就好。扫码界面出现二维码后会很快识别到二维码信息并退出。

Screenshot_20220421_101043_org.venus.mpeqi.jpg

扫描到二维码数据解析后进行业务处理，笔者这里就是扫描到系统内的设备信息并显示。

Screenshot_20220421_101107_org.venus.mpeqi.jpg