二维码

最新推荐文章于 2022-04-19 09:19:08 发布

Alyson_why

最新推荐文章于 2022-04-19 09:19:08 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/weixin_43926099/article/details/88061174

本文详细介绍了如何在Android应用中集成二维码扫描与生成功能，包括添加依赖库、配置权限、实现扫描回调及生成二维码的代码示例。

添加依赖

implementation 'com.github.jwkj:LibZXing:v1.0.4'

最后加上这个

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

在清单文件里添加

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

在activity中写入

package com.example.yuke20190301;
import android.content.ContentResolver;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
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 LoginActivity extends AppCompatActivity {

private Button btn1,btn2,btn3;
private ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    btn1=findViewById(R.id.btn1);
    btn2=findViewById(R.id.btn2);
    btn3=findViewById(R.id.btn3);
    imageView=findViewById(R.id.image);
    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            QRCodeManager.getInstance()
                    .with(LoginActivity.this)
                    .setReqeustType(1)
                    .scanningQRCode(new OnQRCodeScanCallback() {
                        @Override
                        public void onCompleted(String s) {
                            Toast.makeText(LoginActivity.this, "结果:" + s, Toast.LENGTH_SHORT).show();
                        }

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

                        @Override
                        public void onCancel() {
                            Toast.makeText(LoginActivity.this, "扫描取消",Toast.LENGTH_SHORT).show();
                        }
                    });
        }
    });
    btn3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Bitmap bitmap=QRCodeManager.getInstance().createQRCode("ZXingCode",400,400);
            imageView.setImageBitmap(bitmap);
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    QRCodeManager.getInstance().with(LoginActivity.this).onActivityResult(requestCode,resultCode,data);
}
}