您的当前位置:首页正文

2022-04-21 Android开发扫描二维码

2024-11-26 来源:个人技术集锦

Android扫描二维码信息

调用华为的scanplus库做二维码扫描

// 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 = 30
        buildToolsVersion = "30.0.3"
        minSdkVersion = 19
        targetSdkVersion = 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" />

    <application
        android: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">
        <activity
            android: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
显示全文