{"id":719,"date":"2023-01-11T17:56:49","date_gmt":"2023-10-30T23:07:42","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/qr%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8-android%e4%b8%8a%e7%9a%84%e6%9d%a1%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8\/"},"modified":"2025-08-03T04:48:32","modified_gmt":"2025-08-02T20:48:32","slug":"qr%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8-android%e4%b8%8a%e7%9a%84%e6%9d%a1%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/qr%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8-android%e4%b8%8a%e7%9a%84%e6%9d%a1%e7%a0%81%e6%89%ab%e6%8f%8f%e5%99%a8\/","title":{"rendered":"2023\u5e74\u6700\u4f73Android QR\u7801\u626b\u63cf\u5668\u5e94\u7528\u63a8\u8350 &#8211; \u514d\u8d39\u6761\u7801\u626b\u63cf\u5de5\u5177"},"content":{"rendered":"<p>\u8bb8\u591a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u90fd\u5305\u542b\u4e86\u7528\u4e8e\u626b\u63cf\u4e8c\u7ef4\u7801\u6216\u6761\u5f62\u7801\u7684\u529f\u80fd\u3002\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u5e76\u5b9e\u73b0\u5982\u4f55\u4f7f\u7528Google\u79fb\u52a8\u89c6\u89c9API\u4e2d\u7684\u6761\u5f62\u7801API\u3002\u8981\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u89c6\u89c9API\u5b9e\u73b0\u9762\u90e8\u68c0\u6d4b\u529f\u80fd\uff0c\u8bf7\u53c2\u8003\u76f8\u5173\u94fe\u63a5\u3002<\/p>\n<h2>Android\u4e0a\u7684\u6761\u5f62\u7801\u626b\u63cf\u5668<\/h2>\n<div>\n<img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656481b3a4b2f92e6c72ecec\/2-0.png\" alt=\"Android QR\u7801\u626b\u63cf\u5668, Android\u6761\u7801\u626b\u63cf\u5668\u6559\u7a0b\" \/><\/p>\n<ul class=\"post-ul\">\n<li>\u4e00\u7ef4\u6761\u5f62\u7801\uff1aEAN-13\u3001EAN-8\u3001UPC-A\u3001UPC-E\u3001Code-39\u3001Code-93\u3001Code-128\u3001ITF\u3001Codabar<\/li>\n<li>\u4e8c\u7ef4\u6761\u5f62\u7801\uff1aQR\u7801\u3001Data Matrix\u3001PDF-417\u3001AZTEC<\/li>\n<\/ul>\n<\/div>\n<p>\u6761\u5f62\u7801\u53ef\u4ee5\u626b\u63cf\u5404\u79cd\u5185\u5bb9\uff0c\u4eceURL\u3001\u8054\u7cfb\u4fe1\u606f\u5230\u5730\u7406\u4f4d\u7f6e\u3001WIFI\u3001\u9a7e\u7167ID\u7b49\u3002\u4e8c\u7ef4\u7801\u662f\u66f4\u5e38\u89c1\u7684\u683c\u5f0f\uff0c\u5728\u8bb8\u591a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7ecf\u5e38\u89c1\u5230\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u5f00\u53d1\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u4ece\u4f4d\u56fe\u56fe\u50cf\u4e2d\u626b\u63cf\u4e8c\u7ef4\u7801\u503c\uff0c\u540c\u65f6\u901a\u8fc7\u76f8\u673a\u68c0\u6d4b\u4e8c\u7ef4\u7801\u5e76\u6267\u884c\u76f8\u5173\u64cd\u4f5c\u3002<\/p>\n<h2>\u5b89\u5353QR\u7801\u626b\u63cf\u5668\u9879\u76ee\u7ed3\u6784<\/h2>\n<div>\n<img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656481b3a4b2f92e6c72ecec\/6-0.png\" alt=\"Android QR\u7801\u626b\u63cf\u5668, Android\u6761\u7801\u626b\u63cf\u5668\" \/>\n<\/div>\n<h3>\u914d\u7f6eAndroid Studio\u4ee5\u4f7f\u7528\u6761\u5f62\u7801\u5e93<\/h3>\n<p>\u5c06\u4ee5\u4e0b\u5185\u5bb9\u6dfb\u52a0\u5230build.gradle\u6587\u4ef6\u4e2d\uff1a<\/p>\n<pre class=\"post-pre\"><code>implementation 'com.google.android.gms:play-services-vision:11.8.0'\r\n<\/code><\/pre>\n<p>\u5728AndroidManifest.xml\u6587\u4ef6\u7684application\u6807\u7b7e\u5185\u6dfb\u52a0\u4e0b\u5217\u5185\u5bb9\uff0c\u4ee5\u542f\u7528\u5e94\u7528\u4e2d\u7684\u6761\u5f62\u7801\u68c0\u6d4b\uff1a<\/p>\n<pre class=\"post-pre\"><code>&lt;meta-data\r\n            android:name=\"com.google.android.gms.vision.DEPENDENCIES\"\r\n            android:value=\"barcode\" \/&gt;\r\n<\/code><\/pre>\n<h3>\u4ece\u56fe\u50cf\u4e2d\u626b\u63cf\u4e8c\u7ef4\u7801<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aQR\u7801\u626b\u63cf\u5668 &#8211; Android\u4e0a\u7684\u6761\u7801\u626b\u63cf\u5668\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51714\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4e0b\u9762\u662factivity_main.xml\u5e03\u5c40\u6587\u4ef6\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;RelativeLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:paddingBottom=\"@dimen\/activity_vertical_margin\"\r\n    android:paddingLeft=\"@dimen\/activity_horizontal_margin\"\r\n    android:paddingRight=\"@dimen\/activity_horizontal_margin\"\r\n    android:paddingTop=\"@dimen\/activity_vertical_margin\"&gt;\r\n\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnTakePicture\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:layout_centerVertical=\"true\"\r\n        android:text=\"@string\/take_barcode_picture\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnScanBarcode\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_below=\"@+id\/btnTakePicture\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:layout_marginTop=\"@dimen\/activity_horizontal_margin\"\r\n        android:text=\"@string\/scan_barcode\" \/&gt;\r\n&lt;\/RelativeLayout&gt;\r\n\r\n<\/code><\/pre>\n<p>\u4e0b\u9762\u7ed9\u51fa\u4e86MainActivity.java\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.barcodevisionapi;\r\n\r\nimport android.content.Intent;\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.os.Bundle;\r\nimport android.view.View;\r\nimport android.widget.Button;\r\n\r\npublic class MainActivity extends AppCompatActivity implements View.OnClickListener {\r\n\r\n    Button btnTakePicture, btnScanBarcode;\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_main);\r\n        initViews();\r\n    }\r\n\r\n    private void initViews() {\r\n        btnTakePicture = findViewById(R.id.btnTakePicture);\r\n        btnScanBarcode = findViewById(R.id.btnScanBarcode);\r\n        btnTakePicture.setOnClickListener(this);\r\n        btnScanBarcode.setOnClickListener(this);\r\n    }\r\n\r\n    @Override\r\n    public void onClick(View v) {\r\n\r\n        switch (v.getId()) {\r\n            case R.id.btnTakePicture:\r\n                startActivity(new Intent(MainActivity.this, PictureBarcodeActivity.class));\r\n                break;\r\n            case R.id.btnScanBarcode:\r\n                startActivity(new Intent(MainActivity.this, ScannedBarcodeActivity.class));\r\n                break;\r\n        }\r\n\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>MainActivity.java\u6587\u4ef6\u5305\u542b\u4e24\u4e2a\u6309\u94ae\u3002\u7b2c\u4e00\u4e2a\u6309\u94ae\u542f\u52a8\u4e00\u4e2a\u6d3b\u52a8\uff0c\u8be5\u6d3b\u52a8\u626b\u63cf\u4ece\u76f8\u673a\u6355\u83b7\u7684\u4f4d\u56fe\u56fe\u50cf\u4e2d\u7684QR\u7801\uff0c\u5e76\u8fd4\u56deQR\u7801\u4e2d\u7684\u6570\u636e\uff08\u5982\u679c\u6709\uff09\u3002\u7b2c\u4e8c\u4e2a\u6309\u94ae\u5b9e\u65f6\u626b\u63cfQR\u7801\u5e76\u68c0\u6d4b\u5b83\u4eec\u3002\u5728\u6211\u4eec\u7ee7\u7eed\u5e94\u7528\u7a0b\u5e8f\u7684\u4e1a\u52a1\u903b\u8f91\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5c06\u4ee5\u4e0b\u6743\u9650\u6dfb\u52a0\u5230AndroidManifest.xml\u6587\u4ef6\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;uses-feature\r\n        android:name=\"android.hardware.camera\"\r\n        android:required=\"true\" \/&gt;\r\n\r\n    &lt;uses-permission android:name=\"android.permission.CAMERA\" \/&gt;\r\n    &lt;uses-feature android:name=\"android.hardware.camera.autofocus\" \/&gt;\r\n\r\n    &lt;uses-permission android:name=\"android.permission.WRITE_EXTERNAL_STORAGE\" \/&gt;\r\n    &lt;uses-permission android:name=\"android.permission.INTERNET\" \/&gt;\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u5171\u4eab\u548c\u8bbf\u95ee\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u7684\u6587\u4ef6\uff0c\u6211\u4eec\u9700\u8981\u5728AndroidManifest.xml\u6587\u4ef6\u7684\u5e94\u7528\u7a0b\u5e8f\u6807\u7b7e\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4f9b\u5e94\u5546\u6807\u7b7e\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;provider\r\n            android:name=\"android.support.v4.content.FileProvider\"\r\n            android:authorities=\"${applicationId}.provider\"\r\n            android:exported=\"false\"\r\n            android:grantUriPermissions=\"true\"&gt;\r\n            &lt;meta-data\r\n                android:name=\"android.support.FILE_PROVIDER_PATHS\"\r\n                android:resource=\"@xml\/provider_paths\" \/&gt;\r\n        &lt;\/provider&gt;\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u6211\u4eec\u7684\u5b89\u5353\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4e8c\u7ef4\u7801\u626b\u63cf\u5668\u6444\u50cf\u5934\u62cd\u6444\u7684\u56fe\u50cf\u6240\u5fc5\u9700\u7684\u3002\u8ba9\u6211\u4eec\u4ece\u7b2c\u4e00\u4e2a\u5f00\u59cb\uff0c\u5373PictureBarcodeActivity.java\u3002\u4ee5\u4e0b\u662fxml\u5e03\u5c40activity_barcode_picture.xml\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;RelativeLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:tools=\"https:\/\/schemas.android.com\/tools\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:paddingBottom=\"@dimen\/activity_vertical_margin\"\r\n    android:paddingLeft=\"@dimen\/activity_horizontal_margin\"\r\n    android:paddingRight=\"@dimen\/activity_horizontal_margin\"\r\n    android:paddingTop=\"@dimen\/activity_vertical_margin\"&gt;\r\n\r\n    &lt;ImageView\r\n        android:id=\"@+id\/imageView\"\r\n        android:layout_width=\"150dp\"\r\n        android:layout_height=\"150dp\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:src=\"@mipmap\/scdev_logo\" \/&gt;\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/txtResultsHeader\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_below=\"@+id\/imageView\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:text=\"Results\"\r\n        android:textSize=\"18sp\"\r\n        android:textStyle=\"bold\" \/&gt;\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/txtResultsBody\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_below=\"@+id\/txtResultsHeader\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:layout_marginTop=\"@dimen\/activity_horizontal_margin\"\r\n        android:gravity=\"center\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnOpenCamera\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentBottom=\"true\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:layout_marginBottom=\"@dimen\/activity_horizontal_margin\"\r\n        android:layout_marginTop=\"@dimen\/activity_horizontal_margin\"\r\n        android:text=\"@string\/open_camera\" \/&gt;\r\n&lt;\/RelativeLayout&gt;\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662fPictureCodeActivity.java\u7c7b\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.barcodevisionapi;\r\n\r\nimport android.Manifest;\r\nimport android.content.Context;\r\nimport android.content.Intent;\r\nimport android.content.pm.PackageManager;\r\nimport android.graphics.Bitmap;\r\nimport android.graphics.BitmapFactory;\r\nimport android.net.Uri;\r\nimport android.os.Bundle;\r\nimport android.os.Environment;\r\nimport android.provider.MediaStore;\r\nimport android.support.annotation.NonNull;\r\nimport android.support.v4.app.ActivityCompat;\r\nimport android.support.v4.content.FileProvider;\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.util.Log;\r\nimport android.util.SparseArray;\r\nimport android.view.View;\r\nimport android.widget.Button;\r\nimport android.widget.TextView;\r\nimport android.widget.Toast;\r\n\r\nimport com.google.android.gms.vision.Frame;\r\nimport com.google.android.gms.vision.barcode.Barcode;\r\nimport com.google.android.gms.vision.barcode.BarcodeDetector;\r\n\r\nimport java.io.File;\r\nimport java.io.FileNotFoundException;\r\n\r\npublic class PictureBarcodeActivity extends AppCompatActivity implements View.OnClickListener {\r\n\r\n    Button btnOpenCamera;\r\n    TextView txtResultBody;\r\n\r\n    private BarcodeDetector detector;\r\n    private Uri imageUri;\r\n    private static final int REQUEST_CAMERA_PERMISSION = 200;\r\n    private static final int CAMERA_REQUEST = 101;\r\n    private static final String TAG = \"API123\";\r\n    private static final String SAVED_INSTANCE_URI = \"uri\";\r\n    private static final String SAVED_INSTANCE_RESULT = \"result\";\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_barcode_picture);\r\n\r\n        initViews();\r\n\r\n        if (savedInstanceState != null) {\r\n            if (imageUri != null) {\r\n                imageUri = Uri.parse(savedInstanceState.getString(SAVED_INSTANCE_URI));\r\n                txtResultBody.setText(savedInstanceState.getString(SAVED_INSTANCE_RESULT));\r\n            }\r\n        }\r\n\r\n        detector = new BarcodeDetector.Builder(getApplicationContext())\r\n                .setBarcodeFormats(Barcode.DATA_MATRIX | Barcode.QR_CODE)\r\n                .build();\r\n\r\n        if (!detector.isOperational()) {\r\n            txtResultBody.setText(\"Detector initialisation failed\");\r\n            return;\r\n        }\r\n    }\r\n\r\n    private void initViews() {\r\n        txtResultBody = findViewById(R.id.txtResultsBody);\r\n        btnOpenCamera = findViewById(R.id.btnTakePicture);\r\n        txtResultBody = findViewById(R.id.txtResultsBody);\r\n        btnOpenCamera.setOnClickListener(this);\r\n    }\r\n\r\n    @Override\r\n    public void onClick(View v) {\r\n\r\n        switch (v.getId()) {\r\n            case R.id.btnTakePicture:\r\n                ActivityCompat.requestPermissions(PictureBarcodeActivity.this, new\r\n                        String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);\r\n                break;\r\n        }\r\n\r\n    }\r\n\r\n    @Override\r\n    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {\r\n        super.onRequestPermissionsResult(requestCode, permissions, grantResults);\r\n        switch (requestCode) {\r\n            case REQUEST_CAMERA_PERMISSION:\r\n                if (grantResults.length &gt; 0 &amp;&amp; grantResults[0] == PackageManager.PERMISSION_GRANTED &amp;&amp; grantResults[1] == PackageManager.PERMISSION_GRANTED) {\r\n                    takeBarcodePicture();\r\n                } else {\r\n                    Toast.makeText(getApplicationContext(), \"Permission Denied!\", Toast.LENGTH_SHORT).show();\r\n                }\r\n        }\r\n    }\r\n\r\n    @Override\r\n    protected void onActivityResult(int requestCode, int resultCode, Intent data) {\r\n        if (requestCode == CAMERA_REQUEST &amp;&amp; resultCode == RESULT_OK) {\r\n            launchMediaScanIntent();\r\n            try {\r\n\r\n\r\n                Bitmap bitmap = decodeBitmapUri(this, imageUri);\r\n                if (detector.isOperational() &amp;&amp; bitmap != null) {\r\n                    Frame frame = new Frame.Builder().setBitmap(bitmap).build();\r\n                    SparseArray&lt;Barcode&gt; barcodes = detector.detect(frame);\r\n                    for (int index = 0; index &lt; barcodes.size(); index++) {\r\n                        Barcode code = barcodes.valueAt(index);\r\n                        txtResultBody.setText(txtResultBody.getText() + \"\\n\" + code.displayValue + \"\\n\");\r\n\r\n                        int type = barcodes.valueAt(index).valueFormat;\r\n                        switch (type) {\r\n                            case Barcode.CONTACT_INFO:\r\n                                Log.i(TAG, code.contactInfo.title);\r\n                                break;\r\n                            case Barcode.EMAIL:\r\n                                Log.i(TAG, code.displayValue);\r\n                                break;\r\n                            case Barcode.ISBN:\r\n                                Log.i(TAG, code.rawValue);\r\n                                break;\r\n                            case Barcode.PHONE:\r\n                                Log.i(TAG, code.phone.number);\r\n                                break;\r\n                            case Barcode.PRODUCT:\r\n                                Log.i(TAG, code.rawValue);\r\n                                break;\r\n                            case Barcode.SMS:\r\n                                Log.i(TAG, code.sms.message);\r\n                                break;\r\n                            case Barcode.TEXT:\r\n                                Log.i(TAG, code.displayValue);\r\n                                break;\r\n                            case Barcode.URL:\r\n                                Log.i(TAG, \"url: \" + code.displayValue);\r\n                                break;\r\n                            case Barcode.WIFI:\r\n                                Log.i(TAG, code.wifi.ssid);\r\n                                break;\r\n                            case Barcode.GEO:\r\n                                Log.i(TAG, code.geoPoint.lat + \":\" + code.geoPoint.lng);\r\n                                break;\r\n                            case Barcode.CALENDAR_EVENT:\r\n                                Log.i(TAG, code.calendarEvent.description);\r\n                                break;\r\n                            case Barcode.DRIVER_LICENSE:\r\n                                Log.i(TAG, code.driverLicense.licenseNumber);\r\n                                break;\r\n                            default:\r\n                                Log.i(TAG, code.rawValue);\r\n                                break;\r\n                        }\r\n                    }\r\n                    if (barcodes.size() == 0) {\r\n                        txtResultBody.setText(\"No barcode could be detected. Please try again.\");\r\n                    }\r\n                } else {\r\n                    txtResultBody.setText(\"Detector initialisation failed\");\r\n                }\r\n            } catch (Exception e) {\r\n                Toast.makeText(getApplicationContext(), \"Failed to load Image\", Toast.LENGTH_SHORT)\r\n                        .show();\r\n                Log.e(TAG, e.toString());\r\n            }\r\n        }\r\n    }\r\n\r\n    private void takeBarcodePicture() {\r\n        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);\r\n        File photo = new File(Environment.getExternalStorageDirectory(), \"pic.jpg\");\r\n        imageUri = FileProvider.getUriForFile(PictureBarcodeActivity.this,\r\n                BuildConfig.APPLICATION_ID + \".provider\", photo);\r\n        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);\r\n        startActivityForResult(intent, CAMERA_REQUEST);\r\n    }\r\n\r\n    @Override\r\n    protected void onSaveInstanceState(Bundle outState) {\r\n        if (imageUri != null) {\r\n            outState.putString(SAVED_INSTANCE_URI, imageUri.toString());\r\n            outState.putString(SAVED_INSTANCE_RESULT, txtResultBody.getText().toString());\r\n        }\r\n        super.onSaveInstanceState(outState);\r\n    }\r\n\r\n    private void launchMediaScanIntent() {\r\n        Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);\r\n        mediaScanIntent.setData(imageUri);\r\n        this.sendBroadcast(mediaScanIntent);\r\n    }\r\n\r\n    private Bitmap decodeBitmapUri(Context ctx, Uri uri) throws FileNotFoundException {\r\n        int targetW = 600;\r\n        int targetH = 600;\r\n        BitmapFactory.Options bmOptions = new BitmapFactory.Options();\r\n        bmOptions.inJustDecodeBounds = true;\r\n        BitmapFactory.decodeStream(ctx.getContentResolver().openInputStream(uri), null, bmOptions);\r\n        int photoW = bmOptions.outWidth;\r\n        int photoH = bmOptions.outHeight;\r\n\r\n        int scaleFactor = Math.min(photoW \/ targetW, photoH \/ targetH);\r\n        bmOptions.inJustDecodeBounds = false;\r\n        bmOptions.inSampleSize = scaleFactor;\r\n\r\n        return BitmapFactory.decodeStream(ctx.getContentResolver()\r\n                .openInputStream(uri), null, bmOptions);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4ece\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u5f97\u51fa\u7684\u4e00\u4e9b\u63a8\u8bba\u3002<\/p>\n<ul class=\"post-ul\">\n<li>\u4ee5\u4e0b\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u6761\u7801\u68c0\u6d4b\u5668\u3002<br \/>\ndetector = new BarcodeDetector.Builder(getApplicationContext())<br \/>\n.setBarcodeFormats(Barcode.DATA_MATRIX | Barcode.QR_CODE)<br \/>\n.build();<\/li>\n<li>\u8981\u626b\u63cf\u7684\u683c\u5f0f\u7c7b\u578b\u5728setBarcodeFormats()\u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u3002<\/li>\n<li>takeBarcodePicture()\u51fd\u6570\u662f\u542f\u52a8\u76f8\u673a\u7684\u5730\u65b9\u3002\u4e3a\u4e86\u68c0\u7d22\u56fe\u50cf\uff0c\u6211\u4eec\u4f7f\u7528launchMediaScanIntent()\uff0c\u5b83\u8c03\u7528\u4e00\u4e2a\u5e7f\u64adIntent\u6765\u4f7f\u7528\u56fe\u50cfURI\u641c\u7d22\u56fe\u50cf\u3002<\/li>\n<li>\u4f7f\u7528Frame.Builder\u6765\u521b\u5efa\u4f4d\u56fe\u56fe\u50cf\u7684\u5e27\u3002\u5728\u8be5\u5e27\u4e0a\uff0c\u6761\u7801\u68c0\u6d4b\u5668\u626b\u63cf\u53ef\u80fd\u7684QR\u7801\u3002\u4e0a\u9762\u4ee3\u7801\u4e2d\u7684\u4ee5\u4e0b\u884c\u4ece\u4f4d\u56fe\u521b\u5efa\u4e00\u4e2a\u5e27\u3002<br \/>\nFrame frame = new Frame.Builder().setBitmap(bitmap).build();<\/li>\n<li>\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aSparseArray\uff0c\u5b83\u5c06\u901a\u8fc7\u5728\u6761\u7801\u68c0\u6d4b\u5668\u4e0a\u8c03\u7528detect()\u65b9\u6cd5\u6765\u5305\u542b\u56fe\u50cf\u4e2d\u6240\u6709\u53ef\u80fd\u7684QR\u7801\u3002<br \/>\nSparseArray barcodes = detector.detect(frame);\u8981\u83b7\u53d6QR\u7801\u7684\u683c\u5f0f\uff0c\u9700\u8981\u5728Barcode\u5b9e\u4f8b\u4e0a\u8c03\u7528valueFormat\u5b57\u6bb5\uff0c\u5982\u4e0b\u6240\u793a\u3002<br \/>\nbarcodes.valueAt(index).valueFormat<\/li>\n<li>\u8981\u83b7\u53d6\u663e\u793a\u503c\u548c\u539f\u59cb\u503c\uff0c\u9700\u8981\u8c03\u7528\u4ee5\u4e0b\u5185\u5bb9\u3002<br \/>\nbarcodes.valueAt(index).displayValue<br \/>\nbarcodes.valueAt(index).rawValue<\/li>\n<li>\u8fd4\u56de\u7684\u76f8\u5173\u503c\u663e\u793a\u5728TextView\u4e2d\u3002\u5bf9\u4e8e\u4f4d\u56fe\u4e2d\u7684\u591a\u4e2a\u6761\u7801\uff0c\u5b83\u4eec\u7684\u503c\u4f1a\u9644\u52a0\u5230\u5f53\u524d\u7684TextView\u4e2d\u3002<\/li>\n<\/ul>\n<p>ScannedBarcodeActivity.java\u7c7b\u901a\u8fc7\u6444\u50cf\u5934\u626b\u63cf\u6761\u5f62\u7801\u3002\u6211\u4eec\u4ece\u8fd9\u91cc\u751f\u6210\u4e86\u4e24\u4e2a\u81ea\u5b9a\u4e49\u7684QR\u7801\u3002activity_scan_barcode.xml\u7684\u5e03\u5c40\u4ee3\u7801\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;RelativeLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:padding=\"@dimen\/activity_horizontal_margin\"&gt;\r\n\r\n    &lt;SurfaceView\r\n        android:id=\"@+id\/surfaceView\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"match_parent\"\r\n        android:layout_above=\"@+id\/btnAction\"\r\n        android:layout_alignParentLeft=\"true\"\r\n        android:layout_alignParentStart=\"true\"\r\n        android:layout_centerVertical=\"true\" \/&gt;\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/txtBarcodeValue\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentTop=\"true\"\r\n        android:layout_marginLeft=\"@dimen\/activity_horizontal_margin\"\r\n        android:layout_marginStart=\"@dimen\/activity_horizontal_margin\"\r\n        android:text=\"No Barcode Detected\"\r\n        android:textColor=\"@android:color\/white\"\r\n        android:textSize=\"20sp\" \/&gt;\r\n\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnAction\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentBottom=\"true\"\r\n        android:text=\"ADD CONTENT IN THE MAIL\" \/&gt;\r\n\r\n&lt;\/RelativeLayout&gt;\r\n<\/code><\/pre>\n<h3>\u5b89\u5353\u624b\u673a\u76f8\u673a\u7528\u7684\u6761\u5f62\u7801\u626b\u63cf\u5668<\/h3>\n<p>\u4ee5\u4e0b\u662fScannedBarcodeActivity.java\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.barcodevisionapi;\r\n\r\nimport android.Manifest;\r\nimport android.content.Intent;\r\nimport android.content.pm.PackageManager;\r\nimport android.net.Uri;\r\nimport android.os.Bundle;\r\nimport android.support.v4.app.ActivityCompat;\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.util.SparseArray;\r\nimport android.view.SurfaceHolder;\r\nimport android.view.SurfaceView;\r\nimport android.view.View;\r\nimport android.widget.Button;\r\nimport android.widget.TextView;\r\nimport android.widget.Toast;\r\n\r\nimport com.google.android.gms.vision.CameraSource;\r\nimport com.google.android.gms.vision.Detector;\r\nimport com.google.android.gms.vision.barcode.Barcode;\r\nimport com.google.android.gms.vision.barcode.BarcodeDetector;\r\n\r\nimport java.io.IOException;\r\n\r\npublic class ScannedBarcodeActivity extends AppCompatActivity {\r\n\r\n    SurfaceView surfaceView;\r\n    TextView txtBarcodeValue;\r\n    private BarcodeDetector barcodeDetector;\r\n    private CameraSource cameraSource;\r\n    private static final int REQUEST_CAMERA_PERMISSION = 201;\r\n    Button btnAction;\r\n    String intentData = \"\";\r\n    boolean isEmail = false;\r\n\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_scan_barcode);\r\n\r\n        initViews();\r\n    }\r\n\r\n    private void initViews() {\r\n        txtBarcodeValue = findViewById(R.id.txtBarcodeValue);\r\n        surfaceView = findViewById(R.id.surfaceView);\r\n        btnAction = findViewById(R.id.btnAction);\r\n\r\n\r\n        btnAction.setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View v) {\r\n\r\n                if (intentData.length() > 0) {\r\n                    if (isEmail)\r\n                        startActivity(new Intent(ScannedBarcodeActivity.this, EmailActivity.class).putExtra(\"email_address\", intentData));\r\n                    else {\r\n                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(intentData)));\r\n                    }\r\n                }\r\n\r\n\r\n            }\r\n        });\r\n    }\r\n\r\n    private void initialiseDetectorsAndSources() {\r\n\r\n        Toast.makeText(getApplicationContext(), \"\u6761\u7801\u626b\u63cf\u5668\u5df2\u542f\u52a8\", Toast.LENGTH_SHORT).show();\r\n\r\n        barcodeDetector = new BarcodeDetector.Builder(this)\r\n                .setBarcodeFormats(Barcode.ALL_FORMATS)\r\n                .build();\r\n\r\n        cameraSource = new CameraSource.Builder(this, barcodeDetector)\r\n                .setRequestedPreviewSize(1920, 1080)\r\n                .setAutoFocusEnabled(true) \/\/\u60a8\u5e94\u8be5\u6dfb\u52a0\u6b64\u529f\u80fd\r\n                .build();\r\n\r\n        surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {\r\n            @Override\r\n            public void surfaceCreated(SurfaceHolder holder) {\r\n                try {\r\n                    if (ActivityCompat.checkSelfPermission(ScannedBarcodeActivity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {\r\n                        cameraSource.start(surfaceView.getHolder());\r\n                    } else {\r\n                        ActivityCompat.requestPermissions(ScannedBarcodeActivity.this, new\r\n                                String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);\r\n                    }\r\n\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n\r\n\r\n            }\r\n\r\n            @Override\r\n            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {\r\n            }\r\n\r\n            @Override\r\n            public void surfaceDestroyed(SurfaceHolder holder) {\r\n                cameraSource.stop();\r\n            }\r\n        });\r\n\r\n\r\n        barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {\r\n            @Override\r\n            public void release() {\r\n                Toast.makeText(getApplicationContext(), \"\u4e3a\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\uff0c\u6761\u7801\u626b\u63cf\u5668\u5df2\u505c\u6b62\", Toast.LENGTH_SHORT).show();\r\n            }\r\n\r\n            @Override\r\n            public void receiveDetections(Detector.Detections<Barcode> detections) {\r\n                final SparseArray<Barcode> barcodes = detections.getDetectedItems();\r\n                if (barcodes.size() != 0) {\r\n\r\n\r\n                    txtBarcodeValue.post(new Runnable() {\r\n\r\n                        @Override\r\n                        public void run() {\r\n\r\n                            if (barcodes.valueAt(0).email != null) {\r\n                                txtBarcodeValue.removeCallbacks(null);\r\n                                intentData = barcodes.valueAt(0).email.address;\r\n                                txtBarcodeValue.setText(intentData);\r\n                                isEmail = true;\r\n                                btnAction.setText(\"\u6dfb\u52a0\u90ae\u4ef6\u5185\u5bb9\");\r\n                            } else {\r\n                                isEmail = false;\r\n                                btnAction.setText(\"\u6253\u5f00\u94fe\u63a5\");\r\n                                intentData = barcodes.valueAt(0).displayValue;\r\n                                txtBarcodeValue.setText(intentData);\r\n\r\n                            }\r\n                        }\r\n                    });\r\n\r\n                }\r\n            }\r\n        });\r\n    }\r\n\r\n\r\n    @Override\r\n    protected void onPause() {\r\n        super.onPause();\r\n        cameraSource.release();\r\n    }\r\n\r\n    @Override\r\n    protected void onResume() {\r\n        super.onResume();\r\n        initialiseDetectorsAndSources();\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u6839\u636e\u4e0a\u8ff0\u4ee3\u7801\u5f97\u51fa\u7684\u4e00\u4e9b\u63a8\u8bba\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>SurfaceView\u9002\u5408\u663e\u793a\u76f8\u673a\u9884\u89c8\u56fe\u50cf\uff0c\u56e0\u4e3a\u5b83\u80fd\u5feb\u901f\u6e32\u67d3GUI\u3002SurfaceHolder.Callback\u63a5\u53e3\u7528\u4e8e\u63a5\u6536\u6709\u5173\u8868\u9762\u53d8\u5316\u7684\u4fe1\u606f\uff08\u5728\u672c\u4f8b\u4e2d\u662f\u76f8\u673a\u9884\u89c8\uff09\u3002SurfaceHolder.Callback\u5b9e\u73b0\u4e86\u4e09\u4e2a\u65b9\u6cd5\uff1aSurfaceChanged\uff1a\u5f53\u8868\u9762\u7684\u5927\u5c0f\u6216\u683c\u5f0f\u53d1\u751f\u53d8\u5316\u65f6\u8c03\u7528\u6b64\u65b9\u6cd5\u3002SurfaceCreated\uff1a\u5f53\u9996\u6b21\u521b\u5efa\u8868\u9762\u65f6\u8c03\u7528\u6b64\u65b9\u6cd5\u3002SurfaceDestroyed\uff1a\u5f53\u8868\u9762\u88ab\u9500\u6bc1\u65f6\u8c03\u7528\u6b64\u65b9\u6cd5\u3002<\/li>\n<li>CameraSource\u4e0e\u5e95\u5c42\u68c0\u6d4b\u5668\u534f\u540c\u7ba1\u7406\u76f8\u673a\u3002\u5728\u8fd9\u91cc\uff0cSurfaceView\u662f\u5e95\u5c42\u68c0\u6d4b\u5668\u3002CameraSource.start()\u6253\u5f00\u76f8\u673a\u5e76\u5f00\u59cb\u5411SurfaceView\u53d1\u9001\u9884\u89c8\u5e27\u3002CameraSource\u7684\u521b\u5efa\u65b9\u5f0f\u5982\u4e0b\uff1a<br \/>\ncameraSource = new CameraSource.Builder(this, barcodeDetector)<br \/>\n.setRequestedPreviewSize(1920, 1080)<br \/>\n.setAutoFocusEnabled(true) \/\/\u60a8\u5e94\u8be5\u6dfb\u52a0\u6b64\u529f\u80fd<br \/>\n.build();<\/li>\n<li>\u6211\u4eec\u4f7f\u7528setProcessor()\u4e3a\u6761\u7801\u68c0\u6d4b\u5668\u5206\u914d\u4e86\u4e00\u4e2a\u5904\u7406\u5668\u3002\u8be5\u63a5\u53e3\u5305\u542b\u5bf9receiveDetections()\u65b9\u6cd5\u7684\u56de\u8c03\uff0c\u8be5\u65b9\u6cd5\u4ece\u76f8\u673a\u9884\u89c8\u4e2d\u63a5\u6536QR\u7801\u5e76\u5c06\u5176\u6dfb\u52a0\u5230SparseArray\u4e2d\u3002<\/li>\n<li>\u7531\u4e8e\u6761\u7801\u662f\u5728\u540e\u53f0\u7ebf\u7a0b\u4e2d\u68c0\u6d4b\u5230\u7684\uff0c\u56e0\u6b64\u4f7f\u7528Runnable\u5728TextView\u4e2d\u663e\u793aQR\u7801\u7684\u503c\u3002<\/li>\n<li>\u5728\u672c\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u751f\u6210\u5668\u521b\u5efa\u4e86\u4e24\u4e2a\u6761\u7801\u3002\u4e00\u4e2a\u5305\u542bURL\uff0c\u7b2c\u4e8c\u4e2a\u5305\u542b\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002\u70b9\u51fb\u6309\u94ae\u65f6\uff0c\u6839\u636e\u68c0\u6d4b\u5230\u7684QR\u7801\u503c\uff0c\u6211\u4eec\u5c06\u542f\u52a8URL\u6216\u5411\u4eceQR\u7801\u4e2d\u68c0\u6d4b\u5230\u7684\u76f8\u5173\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u3002<\/li>\n<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656481b3a4b2f92e6c72ecec\/34-1.gif\" alt=\"Android QR\u7801\u626b\u63cf\u5668\" \/><\/div>\n<h2>\u4e0b\u8f7dQR\u7801\u3001\u6761\u5f62\u7801\u626b\u63cf\u5668\u793a\u4f8b\u9879\u76ee<\/h2>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u94fe\u63a5\u4e0b\u8f7d\u5b8c\u6574\u7684QR\u7801\u3001\u6761\u5f62\u7801\u626b\u63cf\u5668\u793a\u4f8b\u9879\u76ee\uff0c\u8be5\u9879\u76ee\u5305\u542b\u4e86\u5728Android\u5e73\u53f0\u4e0a\u5b9e\u73b0\u626b\u63cf\u529f\u80fd\u6240\u9700\u7684\u6240\u6709\u4ee3\u7801\u548c\u8d44\u6e90\u6587\u4ef6\u3002<\/p>\n<p><a href=\"#\" class=\"download-button\">\u7acb\u5373\u4e0b\u8f7d<\/a><\/p>\n<p>\u4e0b\u8f7d\u540e\uff0c\u8bf7\u6309\u7167\u9879\u76ee\u4e2d\u7684README\u6587\u4ef6\u8bf4\u660e\u8fdb\u884c\u914d\u7f6e\u548c\u8fd0\u884c\u3002\u5982\u6709\u4efb\u4f55\u95ee\u9898\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u6216\u901a\u8fc7\u90ae\u4ef6\u4e0e\u6211\u4eec\u8054\u7cfb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8bb8\u591a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u90fd\u5305\u542b\u4e86\u7528\u4e8e\u626b\u63cf\u4e8c\u7ef4\u7801\u6216\u6761\u5f62\u7801\u7684\u529f\u80fd\u3002\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u5e76\u5b9e\u73b0\u5982\u4f55\u4f7f\u7528Google\u79fb\u52a8\u89c6\u89c9A 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