鸿蒙开源三方组件--code-scanner 原创 精华

1.介绍

这个三方库主要实现了相机的一些功能和条形码扫描的功能。其中，
相机的功能有：

• 自动对焦和闪光灯控制
• 前后摄像头
• 可定制取景器
• 触摸对焦

条形码扫描：（该功能调用三方库zxing实现）

• 一维码扫描
• 二维码扫描

条形码扫描支持的格式如下：

2.依赖

(1). 在工程的build.gradle的allprojects中，添加HAR所在的Maven仓地址：

repositories {
    maven {
        url 'https://s01.oss.sonatype.org/content/repositories/releases/' 
    }
}

(2).在应用模块的build.gradle的dependencies闭包中，添加如下代码:

dependencies {
    implementation ' io.github.dzsf:code-scanner:1.0.1 '
}

3.使用说明

（1).将相机权限添加到config.json（不要忘记动态权限):

{
    "reqPermissions": [
          {
            "name": "ohos.permission.CAMERA",
            "reason": "Need camera permission",
            "usedScene": {
              "ability": [
                "com.budiyev.ohos.libdemoapp.codescanner.MainAbility",
                "com.budiyev.ohos.libdemoapp.codescanner.CodeScannerAbility"
              ],
              "when": "always"
            }
          }
        ]
}

（2).在layout文件中定义视图：

<?xml version="1.0" encoding="utf-8"?>
<StackLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    xmlns:app="http://schemas.huawei.com/res/ohos-auto"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:id="$+id:stack_layout">

    <com.budiyev.ohos.codescanner.CodeScannerView
        ohos:id="$+id:scanner_view"
        ohos:height="match_parent"
        ohos:width="match_parent"
        app:autoFocusButtonColor="#FFFFFFFF"
        app:autoFocusButtonVisible="true"
        app:flashButtonColor="#FFFFFFFF"
        app:flashButtonVisible="true"
        app:frameColor="#FFFFFFFF"
        app:frameCornersSize="50"
        app:frameCornersRadius="0"
        app:frameAspectRatioWidth="1"
        app:frameAspectRatioHeight="1"
        app:portraitFrameAspectRatioWidth="16"
        app:portraitFrameAspectRatioHeight="9"
        app:frameSize="0.75"
        app:frameThickness="2"
        app:maskColor="#77000000"/>
</StackLayout>

（3).将以下代码添加至自己的Ability和AbilitySlice中：

public class CodeScannerAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setMainRoute(CodeScannerSlice.class.getName());
    }
}

public class CodeScannerSlice extends AbilitySlice {
    private CodeScanner mCodeScanner;
    private CodeScannerView mCodeScannerView;

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_code_scanner);

        mCodeScannerView = (CodeScannerView) findComponentById(ResourceTable.Id_scanner_view);

        mCodeScanner = new CodeScanner(this, mCodeScannerView);

        mCodeScanner.setDecodeCallback(result -> getUITaskDispatcher().syncDispatch(() ->
                new CommonDialog(getContext())
                        .setTitleText("Scan result")
                        .setTitleSubText("Format: " + result.getBarcodeFormat())
                        .setContentText(result.getText())
                        .setAlignment(LayoutAlignment.CENTER)
                        .show()));

        mCodeScanner.setErrorCallback(error -> getUITaskDispatcher().syncDispatch(() ->
                new ToastDialog(getContext())
                        .setText("Error:" + error)
                        .setAlignment(LayoutAlignment.CENTER)
                        .show()));
    }

    @Override
    public void onActive() {
        super.onActive();
        mCodeScanner.startPreview();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }

    public void onBackground() {
        super.onBackground();
    }

    public void onStop() {
        mCodeScanner.stopPreview();
        WindowManager.getInstance().getTopWindow().get().setTransparent(false);
        super.onStop();
    }

    @Override
    public void onOrientationChanged(AbilityInfo.DisplayOrientation displayOrientation) {
        super.onOrientationChanged(displayOrientation);
        mCodeScannerView.setDisplayOrientation(displayOrientation);
    }
}

4.效果展示

5.相关资料

项目地址：https://gitee.com/openneusoft/code-scanner
IDE官方下载地址：https://developer.harmonyos.com/cn/develop/deveco-studio