扫描二维码，生成二维码

最新推荐文章于 2024-11-22 16:21:16 发布

原创最新推荐文章于 2024-11-22 16:21:16 发布 · 109 阅读

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CC 4.0 BY-SA版权

本文介绍如何在Android应用中使用LibZXing库进行二维码扫描和生成。通过导入依赖、配置权限、设置布局及编写主页面操作代码，实现了按钮触发的扫描功能和二维码图片展示。

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导入依赖

allprojects {
    repositories {
        google()
        jcenter()
        maven {url 'https://jitpack.io'}
    }
implementation 'com.github.jwkj:LibZXing:v1.0.4'

配置文件

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CAMERA"/>

布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/sao"
        android:text="扫一扫"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/sheng"
        android:text="生成二维码"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/nullbtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <ImageView
        android:id="@+id/img"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:src="@mipmap/ic_launcher"
        />


</LinearLayout>

主页面操作

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.jwkj.libzxing.OnQRCodeScanCallback;
import com.jwkj.libzxing.QRCodeManager;

public class MainActivity extends AppCompatActivity {
    private Button sao,sheng,nullbtn;
    private ImageView img;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sao=findViewById(R.id.sao);
        sheng=findViewById(R.id.sheng);
        nullbtn=findViewById(R.id.nullbtn);
        img=findViewById(R.id.img);
        //点击扫描二维码
        sao.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                QRCodeManager.getInstance()
                        .with(MainActivity.this)
                        .setReqeustType(1)
                        .scanningQRCode(new OnQRCodeScanCallback() {
                            @Override
                            public void onCompleted(String s) {
                                Toast.makeText(MainActivity.this, "结果:" + s, Toast.LENGTH_SHORT).show();
                            }

                            @Override
                            public void onError(Throwable throwable) {
                                Toast.makeText(MainActivity.this, "扫描错误"+throwable.toString(),Toast.LENGTH_SHORT).show();
                            }

                            @Override
                            public void onCancel() {
                                Toast.makeText(MainActivity.this, "扫描任务取消了", Toast.LENGTH_SHORT).show();
                            }
                        });
            }
        });
        //生成二维码
        sheng.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Bitmap bitmap = QRCodeManager.getInstance().createQRCode("ZXingCode",400,400);
                img.setImageBitmap(bitmap);
            }
        });
        nullbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.bg_button_ivback_qr);
                Bitmap logo_qRcode = QRCodeManager.getInstance().createQRCode("ZXingCode", 400, 400, bitmap);
                img.setImageBitmap(logo_qRcode);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //回调结果
        QRCodeManager.getInstance().with(MainActivity.this).onActivityResult(requestCode, resultCode, data);

    }
}