preface

                             . Now we are used to scanning code, scanning code for payment, scanning code for social account, scanning code for commodity information, scanning code for shopping, etc. Today, I will introduce the development process of scan code purchase.

scene

                       .

Overall plan

Preparation before development

Open Android studio project level build.gradle file

Configure the maven bin address of HMS SDK in all projects - > repositories

allprojects { 
    repositories { 
        google() 
        jcenter() 
        maven {url 'http://developer.huawei.com/repo/'} 
    } 
 }

Configure the maven bin address of HMS SDK in buildscript > repositories

buildscript { 
    repositories { 
        google() 
        jcenter() 
        maven {url 'http://developer.huawei.com/repo/'} 
    } 
 }

Add compilation dependency

  open application level build.gradle file

Integrated SDK

dependencies{  
    implementation 'com.huawei.hms:scan:1.1.3.301'
}

   specify permissions and attributes

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

                   AndroidManifest.xml Declaration of code scanning page in manifest file

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

Key steps of code scanning shopping code development

                       

Dynamic permission application

private static final int PERMISSION_REQUESTS = 1;
@Override 
public void onCreate(Bundle savedInstanceState) { 
    // Checking camera permission   
   if (!allPermissionsGranted()) {
       getRuntimePermissions();
   }
}

Launch add product page

   click add product to trigger the add product page

public void addProduct(View view) {
        Intent intent = new Intent(MainActivity.this, AddProductActivity.class);
        startActivityForResult(intent, REQUEST_ADD_PRODUCT);
    }

Scan the code and enter the product barcode information

Call defaultview to scan

private void scanBarcode(int requestCode) {
        HmsScanAnalyzerOptions options = new HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.ALL_SCAN_TYPE).create();
        ScanUtil.startScan(this, requestCode, options);
    }

Save scan result in callback function

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (data == null) {
            return;
        }
        if ((requestCode == this.REQUEST_CODE_SCAN_ALL)
                && (resultCode == Activity.RESULT_OK)) {
            HmsScan obj = data.getParcelableExtra(ScanUtil.RESULT);
            if (obj != null && obj.getOriginalValue() != null) {
                this.barcode = obj.getOriginalValue();
            }
 
        } else if ((requestCode == this.REQUEST_TAKE_PHOTO)
                && (resultCode == Activity.RESULT_OK)) {
            ......
        }
    }

Scan the code to query the goods

The method of                     

public void queryProduct(View view) {
        HmsScanAnalyzerOptions options = new HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.ALL_SCAN_TYPE).create();
        ScanUtil.startScan(this, REQUEST_QUERY_PRODUCT, options);
}
 
@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (data == null) {
            return;
        }
        if ((requestCode == this.REQUEST_ADD_PRODUCT) && (resultCode == Activity.RESULT_OK)) {
            barcodeToProduct.put(data.getStringExtra(Constant.BARCODE_VALUE), data.getStringExtra(Constant.IMAGE_PATH_VALUE));
        } else if ((requestCode == this.REQUEST_QUERY_PRODUCT) && (resultCode == Activity.RESULT_OK)) {
            HmsScan obj = data.getParcelableExtra(ScanUtil.RESULT);
            String path = "";
            if (obj != null && obj.getOriginalValue() != null) {
                path = barcodeToProduct.get(obj.getOriginalValue());
            }
            if (path != null && !path.equals("")) {
                loadCameraImage(path);
                showPictures();
            }
        }
    }

Demo effect

                           .

Previous links: Hands on how to quickly build message push and operation capabilities in the application
Original link: https://developer.huawei.com/consumer/cn/forum/topicview?tid=0201282395801440275&fid=18
Original author: littlewhite