test pure js

Author: Keillion

1.hello-world/14.read-video-webview/android/app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.dynamsoft.javascript.readvideowebview">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.CAMERA" />
     <application
         android:allowBackup="true"
         android:fullBackupContent="@xml/backup_rules"

1.hello-world/14.read-video-webview/android/app/src/main/assets/index.html

@@ -32,37 +32,45 @@
          * LICENSE ALERT - THE END 
          */
 
-        let pScanner = null;
-        (async function () {
+         (async function() {
             try {
-                await Dynamsoft.DBR.BarcodeReader.loadWasm();
-                window.DBR_Android.onWasmLoaded();
+                const scanner = await Dynamsoft.DBR.BarcodeScanner.createInstance();
+                /** 
+                 * 'onFrameRead' is triggered after the library finishes reading a frame image.
+                 * There can be multiple barcodes on one image.
+                 */
+                scanner.onFrameRead = results => {
+                    console.log("Barcodes on one frame:");
+                    for (let result of results) {
+                        const format = result.barcodeFormatString;
+                        console.log(format + ": " + result.barcodeText);
+                    }
+                };
+                /**
+                 * 'onUniqueRead' is  triggered only when a 'new' barcode is found.
+                 * The amount of time that the library 'remembers' a barcode is defined by 
+                 * "duplicateForgetTime" in "ScanSettings". By default it is set to 3000 ms.
+                 */
+                scanner.onUniqueRead = (txt, result) => {
+                    alert(txt);
+                    console.log("Unique Code Found: ", result);
+                }
+                /**
+                 * 'show()' opens the camera and shows the video stream on the page. 
+                 * After that, the library starts to scan the frame images continuously.
+                 */
+                await scanner.show();
             } catch (ex) {
                 let errMsg;
                 if (ex.message.includes("network connection error")) {
                     errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
                 } else {
-                    errMsg = ex.message || ex;
+                    errMsg = ex.message||ex;
                 }
                 console.error(errMsg);
                 alert(errMsg);
             }
         })();
-
-        async function startScanner() {
-            let scanner = await (pScanner = pScanner || Dynamsoft.DBR.BarcodeScanner.createInstance());
-            await scanner.setUIElement(document.getElementById('div-ui-container'));
-            scanner.onUniqueRead = (txt, result) => {
-                const format = result.barcodeFormatString;
-                window.DBR_Android.onUniqueRead(format + " " + txt)
-            };
-            await scanner.show();
-        }
-
-        async function stopScanner() {
-            let scanner = await pScanner;
-            scanner && scanner.hide();
-        }
     </script>
 </body>
 

1.hello-world/14.read-video-webview/android/app/src/main/java/com/dynamsoft/javascript/readvideowebview/DBRWebViewHelper.java

@@ -11,37 +11,36 @@
 import android.webkit.WebChromeClient;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
-import android.widget.Button;
-import android.widget.Toast;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
 
 public class MainActivity extends AppCompatActivity {
+    static int Camera_Permission_Request_Code = 32765;
     WebView mWebView;
-    DBRWebViewHelper dbrWebViewHelper;
-    Button mButton;
 
-    @SuppressLint("ShowToast")
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        mButton = findViewById(R.id.myButton);
-
-        // In order to avoid conflicts, you can use the following code to set the request code for requesting camera permission before you pollute
-        // dbrWebViewHelper.setCameraPermissionRequestCode(Your code);
 
         // Initialize WebView
         mWebView = findViewById(R.id.myWebview);
-        // Pollute your WebView
-        dbrWebViewHelper = new DBRWebViewHelper();
-        dbrWebViewHelper.pollute(mWebView);
-        Toast toast = Toast.makeText(this, "Loading Library...", Toast.LENGTH_LONG);
-        toast.show();
+        WebSettings settings = webView.getSettings();
+        settings.setJavaScriptEnabled(true);
+        settings.setDomStorageEnabled(true);
+        settings.setMediaPlaybackRequiresUserGesture(false);
+        
         // for development, enabled debugging and clear html files cache
         WebView.setWebContentsDebuggingEnabled(true);
-        mWebView.clearCache(true);
         mWebView.setWebChromeClient(new WebChromeClient() {
             @Override
             public void onPermissionRequest(final PermissionRequest request) {
+                if (ContextCompat.checkSelfPermission(mActivity, "android.permission.CAMERA") != PackageManager.PERMISSION_GRANTED) {
+                    ActivityCompat.requestPermissions(mActivity, new String[]{"android.permission.CAMERA"}, Camera_Permission_Request_Code);
+                }
+                // else {
+                //     evaluateJavascript("startScanner()");
+                // }
                 request.grant(request.getResources());
             }
         });
@@ -50,29 +49,10 @@ public void onPermissionRequest(final PermissionRequest request) {
         mWebView.loadUrl("file:///android_asset/index.html");
     }
 
-    public void switchScanner(View view) {
-        CharSequence text = mButton.getText();
-        if (text.toString().equals("Start")) {
-            mButton.setText(R.string.btn_stop);
-            dbrWebViewHelper.startScanner();
-        } else {
-            mButton.setText(R.string.btn_start);
-            dbrWebViewHelper.stopScanner();
-        }
-    }
-
-    public void showResult(String result) {
-        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
-        dialog.setTitle("Result:").setPositiveButton("OK", null).setMessage(result).show();
-    }
-
-    public void showController() {
-        runOnUiThread(() -> mButton.setVisibility(View.VISIBLE));
-    }
+    // @Override
+    // public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+    //     super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+    //     //dbrWebViewHelper.cameraPermissionHandler(requestCode, permissions, grantResults);
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-        dbrWebViewHelper.cameraPermissionHandler(requestCode, permissions, grantResults);
-    }
+    // }
 }

1.hello-world/14.read-video-webview/android/app/src/main/java/com/dynamsoft/javascript/readvideowebview/MainActivity.java

@@ -20,19 +20,5 @@
 
     </WebView>
 
-    <Button
-        android:id="@+id/myButton"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:onClick="switchScanner"
-        android:text="@string/btn_start"
-        android:visibility="invisible"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.5"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.75" />
-
 
 </androidx.constraintlayout.widget.ConstraintLayout>