详解Android 扫描条形码（Zxing插件）

使用android studio

一、在build.gradle(module:app)添加代码  下载，调用插件

apply plugin: 'com.android.application'
android {
 compilesdkversion 24
 buildtoolsversion "24.0.1"

 defaultconfig {
  applicationid "com.example.ly.scanrfid"
  minsdkversion 19
  targetsdkversion 24
  versioncode 1
  versionname "1.0"
 }
 buildtypes {
  release {
   minifyenabled false
   proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'
  }
 }
 repositories {
  mavencentral()
  maven {
  url "http://dl.bintray.com/journeyapps/maven"
  }
 }
}
dependencies {
 compile filetree(dir: 'libs', include: ['*.jar'])
 testcompile 'junit:junit:4.12'
 compile 'com.android.support:appcompat-v7:24.2.1'
 // supports android 4.0.3 and later (api level 15)
 compile 'com.journeyapps:zxing-android-embedded:2.0.1@aar'
 // supports android 2.1 and later (api level 7), but not optimal for later android versions.
 // if you only plan on supporting android 4.0.3 and up, you don't need to include this.
 compile 'com.journeyapps:zxing-android-legacy:2.0.1@aar'
 // convenience library to launch the scanning and encoding activities.
 // it automatically picks the best scanning library from the above two, depending on the
 // android version and what is available.
 compile 'com.journeyapps:zxing-android-integration:2.0.1@aar'
 // version 3.0.x of zxing core contains some code that is not compatible on android 2.2 and earlier.
 // this mostly affects encoding, but you should test if you plan to support these versions.
 // older versions e.g. 2.2 may also work if you need support for older android versions.
 compile 'com.google.zxing:core:3.0.1'
}

二、添加权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.ly.scanrfid">
 <uses-permission android:name="android.permission.camera"/>
 <uses-permission android:name="android.permission.vibrate"/>
 <uses-permission android:name="android.permission.internet"/>
 <application
  android:allowbackup="true"
  android:icon="@mipmap/ic_launcher"
  android:label="@string/app_name"
  android:supportsrtl="true"
  android:theme="@style/apptheme">
  <activity android:name=".mainactivity">
   <intent-filter>
    <action android:name="android.intent.action.main"/>
    <category android:name="android.intent.category.launcher"/>
   </intent-filter>
  </activity>
 </application>
</manifest>

三、activity代码

package com.example.ly.scanrfid;
import android.content.intent;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.widget.toast;
import com.google.zxing.integration.android.intentintegrator;
import com.google.zxing.integration.android.intentresult;
public class mainactivity extends appcompatactivity {
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
 }
 // 扫描按钮点击监听事件
 public void clickscan(view view) {
  //扫描操作
  intentintegrator integrator = new intentintegrator(mainactivity.this);
  integrator.initiatescan();
 }
 @override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  // 跳转扫描页面返回扫描数据
  intentresult scanresult = intentintegrator.parseactivityresult(requestcode, resultcode, data);
  //  判断返回值是否为空
  if (scanresult != null) {
   //返回条形码数据
   string result = scanresult.getcontents();
   log.d("code", result);
   toast.maketext(this, result, toast.length_long).show();
  }
 }
}

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