Android扫描和生成二维码

本文实例为大家分享了android扫描和生成二维码的具体代码，供大家参考，具体内容如下

mainactivity.java

public class mainactivity extends appcompatactivity {

 private imageview mimageview;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);

  button button =findviewbyid(r.id.btn);
  mimageview =findviewbyid(r.id.img);
  button.setonclicklistener(new view.onclicklistener() { //点击按钮扫描二维码
   @override
   public void onclick(view view) {
    intent intent = new intent(mainactivity.this,captureactivity.class);


    startactivityforresult(intent,2);
   }
  });

 }

 @override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  super.onactivityresult(requestcode, resultcode, data);
  if (requestcode==200&& resultcode==result_ok){

   if (data!=null){
    string content = data.getstringextra(constant.coded_content);
    if (textutils.isempty(content)){

     toast.maketext(mainactivity.this, "您的输入为空!", toast.length_short).show();
     return;

    }

    bitmap logo = bitmapfactory.decoderesource(getresources(), r.mipmap.ic_launcher);
    try {
     bitmap bitmap = codecreator.createqrcode(content, 400, 400, logo);
     mimageview.setimagebitmap(bitmap);
    } catch (writerexception e) {
     e.printstacktrace();
    }

    toast.maketext(mainactivity.this,"扫描"+content,toast.length_short).show();


   }
  }
 }
}

activity.main.xml

<android.support.constraint.constraintlayout 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=".mainactivity"
 android:orientation="vertical">

 <button
  android:id="@+id/btn"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="扫一扫"/>

 <imageview
  android:id="@+id/img"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />

</android.support.constraint.constraintlayout>

需要配置的权限

<uses-permission android:name="android.permission.internet"/>
 <uses-permission android:name="android.permission.camera"></uses-permission>
 <uses-permission android:name="android.permission.vibrate" />
 <uses-permission android:name="android.permission.write_external_storage"></uses-permission>
 <uses-feature android:name="android.hardware.camera" />
 <uses-feature android:name="android.hardware.camera.autofocus" />
 <uses-permission android:name="android.permission.flashlight" />

build.gradle

minsdkversion 16  //配置16
implementation'com.github.yuzhiqiang1993:zxing:2.2.1' //依赖

外部build.gradle

allprojects {
 repositories {
  google()
  jcenter()
  maven { url 'https://jitpack.io' } //加这行代码
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。