一、相关设置

1、下载zxing-android-embedded

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

2、导入到项目中，我是作为模块导入的：file->new->import module，之前直接添加依赖导入无法编辑包里的源代码（比较low）

3、添加依赖：

在项目的build.gradle文件中的dependencies添加

implementation project(':zxing-android-embedded')

二、直接调用这个库

很简单，在你的活动中添加下列代码：

new IntentIntegrator(MainActivity.this)                        .setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)// 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                        .setBarcodeImageEnabled(true)// 扫完码之后生成二维码的图片                        .initiateScan();// 初始化扫码

默认的扫码活动是横屏，很多时候我们需要自定义扫码界面才能满足需求

默认扫码界面：（测试手机丢在车里了，不想下去拿了，勉强看一下）

三、自定义扫码界面：

默认的扫码界面的activity是CaptureActivity

我们需要自己写一个Activity，我写了个MyCaptureActivity，别忘了注册一下

package com.geek66.myzxing;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.support.annotation.NonNull;import android.support.annotation.Nullable;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.KeyEvent;import android.view.View;import android.widget.Button;import android.widget.Toast;import com.google.zxing.integration.android.IntentIntegrator;import com.google.zxing.integration.android.IntentResult;import com.journeyapps.barcodescanner.CaptureManager;import com.journeyapps.barcodescanner.DecoratedBarcodeView;import java.util.ArrayList;/** * @package com.geek66.myzxing * @name MyCaptureActivity * @date 2019/4/29 20:58 * @auther Bibi * @decribe TODO 扫码活动，用来替代系统默认的CaptureActivity **/public class MyCaptureActivity extends AppCompatActivity {    private CaptureManager captureManager;    private DecoratedBarcodeView barcodeView;    private Button btn_result;    private ArrayList result_list;//存放连续扫描的结果    private int i;//计数器，记录重复扫描次数    private String[] goodsIdList;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_mycapture);        barcodeView = findViewById(R.id.dbv_my);        btn_result = findViewById(R.id.btn_result);        result_list = new ArrayList<>();        captureManager = new CaptureManager(this,barcodeView);        captureManager.initializeFromIntent(getIntent(),savedInstanceState);        captureManager.setmResultCallBack(new CaptureManager.ResultCallBack() {            @Override            public void callBack(int requestCode, int resultCode, Intent intent) {                IntentResult result  = IntentIntegrator.parseActivityResult(requestCode,resultCode,intent);                if(result != null&& result.getContents()!=null){                    i++;                    btn_result.setText("已扫描"+i+"点击查看详情");                    captureManager.onResume();//重新加载扫码界面                    captureManager.decode();//调用扫码方法                }            }        });        captureManager.decode();        btn_result.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if(btn_result.getText().equals("点击查看扫描结果")){                    Toast.makeText(MyCaptureActivity.this, "还未进行扫码操作", Toast.LENGTH_SHORT).show();                } else {                    captureManager.onPause();                    Toast.makeText(MyCaptureActivity.this, "已扫码"+i , Toast.LENGTH_SHORT).show();                    showListDialog(list2string(result_list));                }            }        });    }    //已扫码物品详情列表    private void showListDialog(String[] goodsIdList) {        final AlertDialog.Builder listDialog = new AlertDialog.Builder(MyCaptureActivity.this);        listDialog.setTitle("已扫码列表");        listDialog.setItems(goodsIdList, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                //扩展，增加删除条目功能            }        });        listDialog.setPositiveButton("确认", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                //确认按钮事件                Toast.makeText(MyCaptureActivity.this, "确认成功", Toast.LENGTH_SHORT).show();                captureManager.closeAndFinish();//退出扫码活动            }        });        listDialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                dialog.cancel();            }        });        listDialog.show();    }    //list转数组    public String[] list2string (ArrayList list){        goodsIdList = new String[list.size()];        for(int i=0;i

<?xml version="1.0" encoding="utf-8"?>        

//返回结果的方法    protected void returnResult(BarcodeResult rawResult) {        Intent intent = resultIntent(rawResult, getBarcodeImagePath(rawResult));        activity.setResult(Activity.RESULT_OK, intent);//        closeAndFinish(); 注释掉后扫码结束不会结束扫码活动        if(barcodeView.getBarcodeView().isCameraClosed()) {            if(null != mResultCallBack){                mResultCallBack.callBack(IntentIntegrator.REQUEST_CODE,Activity.RESULT_OK,intent);            }        } else {            finishWhenClosed = true;        }//        barcodeView.pause();注释掉后扫码返回结果时扫码view不会暂停，继续可以扫描        inactivityTimer.cancel();    }

//以下三个是为了在MyCaptureActivity中重写callBack方法    public interface ResultCallBack {        void callBack(int requestCode,int resultCode,Intent intent);    }    private ResultCallBack mResultCallBack;    public void setmResultCallBack(ResultCallBack resultCallBack){        this.mResultCallBack= resultCallBack;    }

.setCaptureActivity(MyCaptureActivity.class)

package com.geek66.myzxing;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import com.google.zxing.integration.android.IntentIntegrator;public class MainActivity extends AppCompatActivity {    Button button1;//单次扫码    Button button2;//持续扫码    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button1 = findViewById(R.id.btn_scan);        button2 = findViewById(R.id.btn_scan2);        //调用系统默认扫码界面        button1.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                new IntentIntegrator(MainActivity.this)                        .setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)// 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                        .setBarcodeImageEnabled(true)// 扫完码之后生成二维码的图片                        .initiateScan();// 初始化扫码            }        });        button2.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                new IntentIntegrator(MainActivity.this)                        .setCaptureActivity(MyCaptureActivity.class)                        .setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)// 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                        .setBarcodeImageEnabled(true)// 扫完码之后生成二维码的图片                        .initiateScan();// 初始化扫码            }        });    }}

<?xml version="1.0" encoding="utf-8"?>