本文實例為大家分享了Android實現掃碼功能的具體代碼，供大家參考，具體內容如下

1、引入

implementation ’com.journeyapps:zxing-android-embedded:3.5.0’

2、使用：

public void initScan() {IntentIntegrator integrator = new IntentIntegrator(this);// 設置要掃描的條碼類型，ONE_D_CODE_TYPES：一維碼，QR_CODE_TYPES-二維碼integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);integrator.setCaptureActivity(ScanActivity.class); //設置打開攝像頭的Activityintegrator.setPrompt(''); //底部的提示文字，設為''可以置空integrator.setCameraId(0); //前置或者后置攝像頭integrator.setBeepEnabled(true); //掃描成功的「嗶嗶」聲，默認開啟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('掃碼返回: ' + result);try { JSONObject jsonObject = new JSONObject(result); if (jsonObject.has(Constant.USERPOLICEMENID)) { //TODO 邏輯 } else {ToastUtil.showShortToast('未掃描到有效的信息'); }} catch (Exception e) { ToastUtil.showShortToast('未掃描到有效的信息'); e.printStackTrace();} } else {ToastUtil.showShortToast('未掃描到有效的信息'); }} }

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.DecoratedBarcodeViewandroid: 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.BarcodeViewandroid: 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.QrViewandroid: 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' /> <TextViewandroid: 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.MyActionBarandroid: android:layout_width='match_parent'android:layout_height='wrap_content'app:dark_mode='true'app:title='掃一掃' /></merge>

5、

/** * 自定義掃描界面 */ 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();//繪制4個角 paint.setColor(getResources().getColor(R.color.color_white));//定義畫筆的顏色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); // 畫出外部（即構圖矩形之外）變暗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); //繪制掃描線 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);} }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。