android二维码/条形码扫描

参考：Android进阶 - 二维码扫描 - 简书 (jianshu.com)

zing-android地址：
https://github.com/journeyapps/zxing-android-embedded

注：本文相较于参考使用的版本是4.3.0版本，所以步骤二的部分文件相较于原文进行了修改。

步骤一

导入依赖

dependencies {
    implementation 'com.journeyapps:zxing-android-embedded:4.3.0'
}

步骤二

引入文件

package com.example.xy.index;

import android.os.Bundle;
import android.view.KeyEvent;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.example.xy.R;
import com.example.xy.utils.StatusBarUtils;
import com.journeyapps.barcodescanner.CaptureManager;
import com.journeyapps.barcodescanner.DecoratedBarcodeView;

/**
 * @Class: CustomCaptureActivity
 * @Description: 自定义条形码/二维码扫描
 * @Author: wangnan7
 * @Date: 2017/5/19
 */

public class CustomCaptureActivity extends AppCompatActivity {

    /**
     * 条形码扫描管理器
     */
    private CaptureManager mCaptureManager;

    /**
     * 条形码扫描视图
     */
    private DecoratedBarcodeView mBarcodeView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        StatusBarUtils.transparencyBar(this);
        setContentView(R.layout.activity_zxing_layout);
        mBarcodeView = (DecoratedBarcodeView)findViewById(R.id.zxing_barcode_scanner);
        mCaptureManager = new CaptureManager(this, mBarcodeView);
        mCaptureManager.initializeFromIntent(getIntent(), savedInstanceState);
        mCaptureManager.decode();
    }

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

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

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mCaptureManager.onDestroy();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mCaptureManager.onSaveInstanceState(outState);
    }

    /**
     * 权限处理
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        mCaptureManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

    /**
     * 按键处理
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return mBarcodeView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
    }
}

package com.example.xy.index;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.ViewConfiguration;

import androidx.annotation.Nullable;
import androidx.recyclerview.widget.RecyclerView;

public class CustomRecyclerView extends RecyclerView {
    private int mTouchSlop;
    public CustomRecyclerView(Context context) {
        super(context);
        final ViewConfiguration vc = ViewConfiguration.get(context);
        mTouchSlop = vc.getScaledTouchSlop();
    }

    public CustomRecyclerView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        final ViewConfiguration vc = ViewConfiguration.get(context);
        mTouchSlop = vc.getScaledTouchSlop();
    }


    int move_x,move_y;
    @Override
    public boolean dispatchTouchEvent(MotionEvent e) {
        switch (e.getAction()){

            case MotionEvent.ACTION_DOWN:
                move_x = (int) e.getX();
                move_y = (int) e.getY();
                getParent().requestDisallowInterceptTouchEvent(true);
                Log.e("motion_event","down   x==y  "+move_x+" ==== "+move_y);
                break;
            case MotionEvent.ACTION_MOVE:
                Log.e("motion_event","move   x==y  "+move_x+" ==== "+move_y);
                int y = (int) e.getY();
                int x = (int) e.getX();
                if(Math.abs(y-move_y)>mTouchSlop&&Math.abs(x-move_x)<mTouchSlop*2){
                    getParent().requestDisallowInterceptTouchEvent(false);
                }else {
                    getParent().requestDisallowInterceptTouchEvent(true);
                }
                break;
            case MotionEvent.ACTION_UP:
                Log.e("motion_event","up   x==y  "+move_x+" ==== "+move_y);

                getParent().requestDisallowInterceptTouchEvent(false);
                break;
        }
        return super.dispatchTouchEvent(e);
    }
}

package com.example.xy.index.wdiget;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Rect;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.util.TypedValue;

import com.google.zxing.ResultPoint;
import com.journeyapps.barcodescanner.Size;
import com.journeyapps.barcodescanner.ViewfinderView;

import java.util.ArrayList;
import java.util.List;

/**
 * @Class: CustomViewfinderView
 * @Description: 自定义扫描框样式
 * @Author: wangnan7
 * @Date: 2017/5/22
 */

public class CustomViewfinderView extends ViewfinderView {

    /**
     * 重绘时间间隔
     */
    public static final long CUSTOME_ANIMATION_DELAY = 16;

    /* ******************************************    边角线相关属性    ************************************************/

    /**
     * "边角线长度/扫描边框长度"的占比 (比例越大，线越长)
     */
    public float mLineRate = 0.1F;

    /**
     * 边角线厚度 (建议使用dp)
     */
    public float mLineDepth =  TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources().getDisplayMetrics());

    /**
     * 边角线颜色
     */
    public int mLineColor = Color.WHITE;

    /* *******************************************    扫描线相关属性    ************************************************/

    /**
     * 扫描线起始位置
     */
    public int mScanLinePosition = 0;

    /**
     * 扫描线厚度
     */
    public float mScanLineDepth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources().getDisplayMetrics());

    /**
     * 扫描线每次重绘的移动距离
     */
    public float mScanLineDy = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 3, getResources().getDisplayMetrics());

    /**
     * 线性梯度
     */
    public LinearGradient mLinearGradient;

    /**
     * 线性梯度位置
     */
    public float[] mPositions = new float[]{0f, 0.5f, 1f};

    /**
     * 线性梯度各个位置对应的颜色值
     */
    public int[] mScanLineColor = new int[]{0x00FFFFFF, Color.WHITE, 0x00FFFFFF};


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

    @Override
    public void onDraw(Canvas canvas) {
        refreshSizes();
        if (framingRect == null || previewSize == null) {
            return;
        }

        Rect frame = framingRect;
        final Size previewSize = this.previewSize;

        int width = canvas.getWidth();
        int height = canvas.getHeight();

        //绘制4个角
        paint.setColor(mLineColor); // 定义画笔的颜色
        canvas.drawRect(frame.left, frame.top, frame.left + frame.width() * mLineRate, frame.top + mLineDepth, paint);
        canvas.drawRect(frame.left, frame.top, frame.left + mLineDepth, frame.top + frame.height() * mLineRate, paint);

        canvas.drawRect(frame.right - frame.width() * mLineRate, frame.top, frame.right, frame.top + mLineDepth, paint);
        canvas.drawRect(frame.right - mLineDepth, frame.top, frame.right, frame.top + frame.height() * mLineRate, paint);

        canvas.drawRect(frame.left, frame.bottom - mLineDepth, frame.left + frame.width() * mLineRate, frame.bottom, paint);
        canvas.drawRect(frame.left, frame.bottom - frame.height() * mLineRate, frame.left + mLineDepth, frame.bottom, paint);

        canvas.drawRect(frame.right - frame.width() * mLineRate, frame.bottom - mLineDepth, frame.right, frame.bottom, paint);
        canvas.drawRect(frame.right - mLineDepth, frame.bottom - frame.height() * mLineRate, 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 {
            // 绘制扫描线
            mScanLinePosition += mScanLineDy;
            if(mScanLinePosition > frame.height()){
                mScanLinePosition = 0;
            }
            mLinearGradient = new LinearGradient(frame.left, frame.top + mScanLinePosition, frame.right, frame.top + mScanLinePosition, mScanLineColor, mPositions, Shader.TileMode.CLAMP);
            paint.setShader(mLinearGradient);
            canvas.drawRect(frame.left, frame.top + mScanLinePosition, frame.right, frame.top + mScanLinePosition + mScanLineDepth, paint);
            paint.setShader(null);

            float scaleX = frame.width() / (float) previewSize.width;
            float scaleY = frame.height() / (float) previewSize.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);
                }
            }
        }

        // Request another update at the animation interval, but only repaint the laser line,
        // not the entire viewfinder mask.
        postInvalidateDelayed(CUSTOME_ANIMATION_DELAY,
                frame.left,
                frame.top,
                frame.right,
                frame.bottom);
    }
}

步骤三

点击事件出发扫描

        //二维码/条形码
        ivQr.setOnClickListener {
            // 创建IntentIntegrator对象
            val intentIntegrator = IntentIntegrator(me)
            intentIntegrator.setTimeout(1000 * 30)
            intentIntegrator.setCaptureActivity(CustomCaptureActivity::class.java)
            // 开始扫描
            intentIntegrator.initiateScan()
        }