简单 快速 自定义 Zxing 条码识别框

第一步

//zing  扫描码
implementation 'com.journeyapps:zxing-android-embedded:3.6.0'

 

第二步

CustomZxingView

public class CustomZxingView extends ViewfinderView {

    public int laserLinePosition = 0;
    public float[] position = new float[]{0f, 0.5f, 1f};
    public int[] colors = new int[]{0xff0699e6, 0xff0699e6, 0xff0699e6};
    public LinearGradient linearGradient;

    public CustomZxingView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * 重写draw方法绘制自己的扫描框
     *
     * @param canvas
     */
    @Override
    public void onDraw(Canvas canvas) {
        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(Color.parseColor("#139D57"));//定义画笔的颜色
        canvas.drawRect(frame.left, frame.top, frame.left + 100, frame.top + 10, paint);
        canvas.drawRect(frame.left, frame.top, frame.left + 10, frame.top + 100, paint);

        canvas.drawRect(frame.right - 100, frame.top, frame.right, frame.top + 10, paint);
        canvas.drawRect(frame.right - 10, frame.top, frame.right, frame.top + 100, paint);

        canvas.drawRect(frame.left, frame.bottom - 10, frame.left + 100, frame.bottom, paint);
        canvas.drawRect(frame.left, frame.bottom - 100, frame.left + 10, frame.bottom, paint);

        canvas.drawRect(frame.right - 100, frame.bottom - 10, frame.right, frame.bottom, paint);
        canvas.drawRect(frame.right - 10, frame.bottom - 100, frame.right, frame.bottom, paint);
        // Draw the exterior (i.e. outside the framing rect) darkened
        paint.setColor(resultBitmap != null ? resultColor : maskColor);
        canvas.drawRect(0, 0, width, frame.top, paint);
        canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
        canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
        canvas.drawRect(0, frame.bottom + 1, 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 {
            int middle = frame.height() / 2 + frame.top;
            laserLinePosition = laserLinePosition + 5;
            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 currentPossible = possibleResultPoints;
            List 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);
        }
    }

}

第三部

QrCodeActivity

public class QrCodeActivity extends AppCompatActivity implements DecoratedBarcodeView.TorchListener {

    private DecoratedBarcodeView decoratedBarcodeView;
    private CaptureManager captureManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 5.0以上系统状态栏透明
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = getWindow();
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
        }
        setContentView(R.layout.activity_qr_code);
        //隐藏底部操作栏
        getSupportActionBar().hide();

        decoratedBarcodeView=this.findViewById(R.id.decoratedBarcodeView);
        //重要代码，初始化捕获
        captureManager = new CaptureManager(this, decoratedBarcodeView);
        captureManager.initializeFromIntent(getIntent(), savedInstanceState);
        captureManager.decode();
        decoratedBarcodeView.setTorchListener(this);
    }

    @Override
    public void onTorchOn() {

    }

    @Override
    public void onTorchOff() {

    }
    @Override
    protected void onPause() {
        super.onPause();
        captureManager.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        captureManager.onResume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        captureManager.onDestroy();
    }
    @Override
    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
        super.onSaveInstanceState(outState, outPersistentState);
        captureManager.onSaveInstanceState(outState);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return decoratedBarcodeView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
    }

}

activity_qr_code：

layout_zxing：

 

在activity 中使用

new IntentIntegrator(this)
        .setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES)// 扫码的类型,可选：一维码，二维码，一/二维码
        //.setPrompt("请对准二维码")// 设置提示语
        .setCameraId(0)// 选择摄像头,可使用前置或者后置
        .setBeepEnabled(true)// 是否开启声音,扫完码之后会"哔"的一声
        .setCaptureActivity(QrCodeActivity.class)//自定义扫码界面
        .initiateScan();// 初始化扫码

 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    //扫码结果
    IntentResult intentResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
    if (intentResult != null) {
        if (intentResult.getContents() == null) {
            //扫码失败
        } else {
            String result = intentResult.getContents();//返回值
            mShowTv.setText("扫码结果：" + result);
        }
    }

https://download.csdn.net/download/Jonly_W/12321731