Android ZXing 二维码/条形码 开源库的简单应用

ZXing ( Zebra Crossing )

ZXing 是一个开源的，使用 Java 实现的多种格式的 1D/2D 条码图像处理库，可以使用该库利用手机内置的摄像头完成条码的扫描与解码。

ZXing 支持一下几种格式

build.gradle 的设置

需要添加依赖

dependencies {
    implementation 'com.journeyapps:zxing-android-embedded:3.5.0'
}
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注意，这里版本至少为 3.5.0 版本，否则会出现问题。

gradle.properties 的设置

android.enableJetifier=true
android.useAndroidX=true
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请添加上述两行代码，否则会出现如下的报错

Duplicate class android.support.v4.app.INotificationSideChannel found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.IResultReceiver found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.ResultReceiver found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)
Duplicate class android.support.v4.
os.ResultReceiver$1 found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.8.0-runtime (androidx.core:core:1.8.0) and support-compat-25.1.0-runtime (com.android.support:support-compat:25.1.0)

Go to the documentation to learn how to Fix dependency resolution errors.
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界面设计 activity_main.xml

<androidx.constraintlayout.widget.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">

    <Button
        android:id="@+id/Scan_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="200dp"
        android:text="Scan"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

androidx.constraintlayout.widget.ConstraintLayout>
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[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-Sl9Jgqbk-1662629225209)(Readme.assets/截屏2022-09-08 16.54.47.png)]

MainActivity

import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
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;

public class MainActivity extends AppCompatActivity {

    Button btScan;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btScan = findViewById(R.id.Scan_btn);

        btScan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // 初始化 intent integrator
                IntentIntegrator intentIntegrator = new IntentIntegrator(
                        MainActivity.this
                );
                // 设置扫描界面的提示词
                intentIntegrator.setPrompt("For Flash use volume up key");
                // 设置蜂鸣器效果
                intentIntegrator.setBeepEnabled(true);
                // 停止界面旋转
                intentIntegrator.setOrientationLocked(true);
                // 设置扫描时用到的 Activity，在这个界面调用 Camera
                intentIntegrator.setCaptureActivity(Capture.class);
                // 初始化扫描程序
                intentIntegrator.initiateScan();
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        IntentResult intentResult = IntentIntegrator.parseActivityResult(
                // 初始化 Intent 结果
                requestCode,resultCode,data
        );
        // 检查状态
        if (intentResult.getContents() != null){
            // 当扫描结果不为空的时候，初始化提示框
            AlertDialog.Builder builder = new AlertDialog.Builder(
                    MainActivity.this
            );
            // 设置标题
            builder.setTitle("Result");
            // 设置要显示的信息内容
            builder.setMessage(intentResult.getContents());
            // 设置一个可以按下的按钮
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    // 按下按钮之后对话框消失
                    dialogInterface.dismiss();
                }
            });
            // 展示对话框
            builder.show();
        }else {
            // 当扫描结果为空的时候
            // 展示 Toast 信息
            Toast.makeText(getApplicationContext(),"You did not scan anything",Toast.LENGTH_LONG)
                    .show();
        }
    }
}
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Capture

import com.journeyapps.barcodescanner.CaptureActivity;

public class Capture extends CaptureActivity {
}
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实现效果