二维码扫描应用开发-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_37457363/article/details/79016230
依赖
compile 'com.journeyapps:zxing-android-embedded:3.3.0'
权限
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />

MainActivity.javapackage com.bawei.com.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

public class MainActivity extends AppCompatActivity {

    private Button btnClick;
    private TextView tvResult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initEvent();
    }
    private void initView() {
        btnClick = (Button) findViewById(R.id.btn_click);
        tvResult = (TextView) findViewById(R.id.tv_result);
    }


    private void initEvent() {
        btnClick.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //假如你要用的是fragment进行界面的跳转
                //IntentIntegrator intentIntegrator = IntentIntegrator.forSupportFragment(ShopFragment.this).setCaptureActivity(CustomScanAct.class);
                IntentIntegrator intentIntegrator = new IntentIntegrator(MainActivity.this);
                intentIntegrator
                        .setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES)
                        .setPrompt("将二维码/条码放入框内，即可自动扫描")//写那句提示的话
                        .setOrientationLocked(false)//扫描方向固定
                        .setCaptureActivity(CustomScanAct.class) // 设置自定义的activity是CustomActivity
                        .initiateScan(); // 初始化扫描
            }
        });
    }


    //获取扫描的结果
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        IntentResult intentResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if (intentResult != null) {
            if (intentResult.getContents() == null) {


            } else {
                // ScanResult 为获取到的字符串
                String ScanResult = intentResult.getContents();
                tvResult.setText(ScanResult);
            }
        } else {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }
}
CustomViewfinderView.java
package com.bawei.com.myapplication;

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

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

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

/**
 * Created by Wangrx on 2017/11/5.
 */

public class CustomViewfinderView extends ViewfinderView {
    public int laserLinePosition=0;
    public float[] position=new float[]{0f,0.5f,1f};
    public int[] colors=new int[]{0x00ffffff,0xffffffff,0x00ffffff};
    public LinearGradient linearGradient ;
    public CustomViewfinderView(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(0xFFFFFFFF);//定义画笔的颜色
        canvas.drawRect(frame.left, frame.top, frame.left+70, frame.top+10, paint);
        canvas.drawRect(frame.left, frame.top, frame.left + 10, frame.top + 70, paint);


        canvas.drawRect(frame.right-70, frame.top, frame.right, frame.top+10, paint);
        canvas.drawRect(frame.right-10, frame.top, frame.right, frame.top+70, paint);


        canvas.drawRect(frame.left, frame.bottom-10, frame.left+70, frame.bottom, paint);
        canvas.drawRect(frame.left, frame.bottom-70, frame.left+10, frame.bottom, paint);


        canvas.drawRect(frame.right-70, frame.bottom-10, frame.right, frame.bottom, paint);
        canvas.drawRect(frame.right-10, frame.bottom-70, 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 {
            //  paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
            //  scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
            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.setColor(laserColor);
            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);
            // postInvalidate();


        }
    }
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    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" tools:context="com.bawei.com.myapplication.MainActivity">

    <Button
        android:id="@+id/btn_click"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="打开二维码"
        />
    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/btn_click"/>

</RelativeLayout>
扫描二维码 Zxing
