二维码扫描，没有生成，生成比较复杂

一，增加远程依赖

        app构建脚本中加：      

          implementation 'com.journeyapps:zxing-android-embedded:4.3.0'

二，注册表改一下

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.please_light">
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />
    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Please_light">
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main"
            android:theme="@style/Theme.Please_light.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.journeyapps.barcodescanner.CaptureActivity"
            android:screenOrientation="portrait"
            tools:replace="android:screenOrientation"/>
    </application>

</manifest>

三，启动扫描

public static final int SCAN_CODE=0X02;
..........
Intent intent=new Intent(context, CaptureActivity.class);
                startActivityForResult(intent,SCAN_CODE);
............

四，扫描完成会返回结果接收

  @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable @org.jetbrains.annotations.Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==RESULT_OK && data!=null){
            IntentResult result= IntentIntegrator.parseActivityResult(resultCode,data);
            String code=result.getContents();
            Toast.makeText(context,code,Toast.LENGTH_LONG).show();
            }
    }

五.找了一天得资料，全他妈得跑不起来，我要有啃源码得时间我不会信你们得鬼。