这篇文章将为大家详细讲解有关怎么在Android中实现扫码功能,文章内容质量较高,因此小编分享给大家做个参考,希望大家阅读完这篇文章后对相关知识有一定的了解。
1、引入
implementation 'com.journeyapps:zxing-android-embedded:3.5.0'
2、使用:
public void initScan() { IntentIntegrator integrator = new IntentIntegrator(this); // 设置要扫描的条码类型,ONE_D_CODE_TYPES:一维码,QR_CODE_TYPES-二维码 integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES); integrator.setCaptureActivity(ScanActivity.class); //设置打开摄像头的Activity integrator.setPrompt(""); //底部的提示文字,设为""可以置空 integrator.setCameraId(0); //前置或者后置摄像头 integrator.setBeepEnabled(true); //扫描成功的「哔哔」声,默认开启 integrator.setBarcodeImageEnabled(true); integrator.initiateScan(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { super.onActivityResult(requestCode, resultCode, intent); if (requestCode == IntentIntegrator.REQUEST_CODE) { IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent); if (scanResult != null && scanResult.getContents() != null) { String result = scanResult.getContents(); LogUtil.d("扫码返回: " + result); try { JSONObject jsonObject = new JSONObject(result); if (jsonObject.has(Constant.USERPOLICEMENID)) { //TODO 逻辑 } else { ToastUtil.showShortToast("未扫描到有效的信息"); } } catch (Exception e) { ToastUtil.showShortToast("未扫描到有效的信息"); e.printStackTrace(); } } else { ToastUtil.showShortToast("未扫描到有效的信息"); } } }
3、ScanActivity
public class ScanActivity extends BackActivity { @BindView(R.id.dbv) DecoratedBarcodeView mDbv; private CaptureManager captureManager; @Override protected int getLayoutId() { getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); return R.layout.activity_scan; } @Override protected void init() { super.init(); captureManager = new CaptureManager(this, mDbv); captureManager.initializeFromIntent(getIntent(), getSavedInstanceState()); captureManager.decode(); } @Override public void onSaveInstanceState(@NotNull Bundle outState, @NotNull PersistableBundle outPersistentState) { super.onSaveInstanceState(outState, outPersistentState); captureManager.onSaveInstanceState(outState); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return mDbv.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event); } @Override protected void onPause() { super.onPause(); captureManager.onPause(); } @Override public void onResume() { super.onResume(); captureManager.onResume(); } @Override protected void onDestroy() { super.onDestroy(); captureManager.onDestroy(); } }
4、布局文件
activity_scan
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".ui.main.alarmassistant.ScanActivity"> <com.journeyapps.barcodescanner.DecoratedBarcodeView android:id="@+id/dbv" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" app:zxing_framing_rect_height="200dp" app:zxing_framing_rect_width="200dp" app:zxing_preview_scaling_strategy="fitXY" app:zxing_scanner_layout="@layout/view_qr" app:zxing_use_texture_view="true" /> </LinearLayout>
view_qr
<?xml version="1.0" encoding="utf-8"?> <merge xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <com.journeyapps.barcodescanner.BarcodeView android:id="@+id/zxing_barcode_surface" android:layout_width="match_parent" android:layout_height="match_parent" app:zxing_framing_rect_height="50dp" app:zxing_framing_rect_width="250dp" /> <com.x.x.widget.QrView android:id="@+id/zxing_viewfinder_view" android:layout_width="match_parent" android:layout_height="match_parent" app:zxing_possible_result_points="@color/color_white" app:zxing_result_view="@color/zxing_custom_result_view" app:zxing_viewfinder_laser="@color/color_white" app:zxing_viewfinder_mask="@color/zxing_custom_viewfinder_mask" /> <TextView android:id="@+id/zxing_status_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|center_horizontal" android:layout_marginBottom="30dp" android:background="@color/zxing_transparent" android:text="@string/zxing_msg_default_status" android:textColor="@color/zxing_status_text" /> <com.x.common.widget.MyActionBar android:id="@+id/action_bar" android:layout_width="match_parent" android:layout_height="wrap_content" app:dark_mode="true" app:title="扫一扫" /> </merge>
5、
/** * 自定义扫描界面 */ public class QrView extends ViewfinderView { public int laserLinePosition = 0; public float[] position = new float[]{0f, 0.5f, 1f}; public int[] colors = new int[]{0x0027B14D, 0xff27B14D, 0x0027B14D}; public LinearGradient linearGradient; private int ScreenRate; public QrView(Context context, AttributeSet attrs) { super(context, attrs); float density = context.getResources().getDisplayMetrics().density; ScreenRate = (int) (15 * density); } @Override public void onDraw(Canvas canvas) { int CORNER_WIDTH = 15; refreshSizes(); if (framingRect == null || previewFramingRect == null) { return; } Rect frame = framingRect; Rect previewFrame = previewFramingRect; int width = canvas.getWidth(); int height = canvas.getHeight(); //绘制4个角 paint.setColor(getResources().getColor(R.color.color_white));//定义画笔的颜色 canvas.drawRect(frame.left, frame.top, frame.left + ScreenRate, frame.top + CORNER_WIDTH, paint); canvas.drawRect(frame.left, frame.top, frame.left + CORNER_WIDTH, frame.top + ScreenRate, paint); canvas.drawRect(frame.right - ScreenRate, frame.top, frame.right, frame.top + CORNER_WIDTH, paint); canvas.drawRect(frame.right - CORNER_WIDTH, frame.top, frame.right, frame.top + ScreenRate, paint); canvas.drawRect(frame.left, frame.bottom - CORNER_WIDTH, frame.left + ScreenRate, frame.bottom, paint); canvas.drawRect(frame.left, frame.bottom - ScreenRate, frame.left + CORNER_WIDTH, frame.bottom, paint); canvas.drawRect(frame.right - ScreenRate, frame.bottom - CORNER_WIDTH, frame.right, frame.bottom, paint); canvas.drawRect(frame.right - CORNER_WIDTH, frame.bottom - ScreenRate, frame.right, frame.bottom, paint); // 画出外部(即构图矩形之外)变暗 paint.setColor(resultBitmap != null ? resultColor : maskColor); canvas.drawRect(0, 0, width, frame.top, paint); canvas.drawRect(0, frame.top, frame.left, frame.bottom, paint); canvas.drawRect(frame.right, frame.top, width, frame.bottom, paint); canvas.drawRect(0, frame.bottom, width, height, paint); if (resultBitmap != null) { // Draw the opaque result bitmap over the scanning rectangle paint.setAlpha(CURRENT_POINT_OPACITY); canvas.drawBitmap(resultBitmap, null, frame, paint); } else { laserLinePosition = laserLinePosition + 8; if (laserLinePosition >= frame.height()) { laserLinePosition = 0; } linearGradient = new LinearGradient(frame.left + 1, frame.top + laserLinePosition, frame.right - 1, frame.top + 10 + laserLinePosition, colors, position, Shader.TileMode.CLAMP); // Draw a red "laser scanner" line through the middle to show decoding is active paint.setShader(linearGradient); //绘制扫描线 canvas.drawRect(frame.left + 1, frame.top + laserLinePosition, frame.right - 1, frame.top + 10 + laserLinePosition, paint); paint.setShader(null); float scaleX = frame.width() / (float) previewFrame.width(); float scaleY = frame.height() / (float) previewFrame.height(); List<ResultPoint> currentPossible = possibleResultPoints; List<ResultPoint> currentLast = lastPossibleResultPoints; int frameLeft = frame.left; int frameTop = frame.top; if (currentPossible.isEmpty()) { lastPossibleResultPoints = null; } else { possibleResultPoints = new ArrayList<>(5); lastPossibleResultPoints = currentPossible; paint.setAlpha(CURRENT_POINT_OPACITY); paint.setColor(resultPointColor); for (ResultPoint point : currentPossible) { canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX), frameTop + (int) (point.getY() * scaleY), POINT_SIZE, paint); } } if (currentLast != null) { paint.setAlpha(CURRENT_POINT_OPACITY / 2); paint.setColor(resultPointColor); float radius = POINT_SIZE / 2.0f; for (ResultPoint point : currentLast) { canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX), frameTop + (int) (point.getY() * scaleY), radius, paint); } } postInvalidateDelayed(16, frame.left, frame.top, frame.right, frame.bottom); } } }
关于怎么在Android中实现扫码功能就分享到这里了,希望以上内容可以对大家有一定的帮助,可以学到更多知识。如果觉得文章不错,可以把它分享出去让更多的人看到。
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。