背景:
随着移动互联网的普及以及智能终端设备的广泛应用,移动支付变得越来越便捷,通过扫描二维码代替传统的刷卡行为。那么作为开发者而言生成二维码成为了一项必备技能。
准备:
使用zxing包
implementation "com.google.zxing:core:3.3.1"
核心代码:
package com.wangpengpro.h5test.utils; import android.graphics.Bitmap; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.WriterException; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import java.util.HashMap; import java.util.Map; /** * @author Created by Mr.Wang on 2019/10/10 15:05. * usage: */ public class CodeUtils { /** * 生成条形码(不支持中文) * * @param content * @return */ public static Bitmap createBarcode(String content) { try { BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.CODE_128,3000,700); int width = bitMatrix.getWidth(); int height = bitMatrix.getHeight(); int[] pixels = new int[width * height]; for (int y = 0; y < height; y++) { int offset = y * width; for (int x = 0; x < width; x++) { pixels[offset + x] = bitMatrix.get(x,y) ? 0xff000000 : 0xFFFFFFFF; } } Bitmap bitmap = Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888); bitmap.setPixels(pixels,width,height); return bitmap; } catch (WriterException e) { e.printStackTrace(); } return null; } /** * 生成二维码 * * @param content * @return */ public static Bitmap createQrcode(String content) { Map<EncodeHintType,Object> hints = new HashMap<>(); // 支持中文配置 hints.put(EncodeHintType.CHARACTER_SET,"UTF-8"); hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.H); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE,1000,hints); int width = bitMatrix.getWidth(); int height = bitMatrix.getHeight(); int[] pixels = new int[width * height]; for (int y = 0; y < height; y++) { int offset = y * width; for (int x = 0; x < width; x++) { pixels[offset + x] = bitMatrix.get(x,height); return bitmap; } catch (WriterException e) { e.printStackTrace(); } return null; } }
使用:
ImageActivity.java public class ImageActivity extends AppCompatActivity { @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_image); ImageView ivBarcode = findViewById(R.id.iv_barcode); ImageView ivQrcode = findViewById(R.id.iv_qrcode); ivBarcode.setImageBitmap(CodeUtils.createBarcode("This is a barcode")); ivQrcode.setImageBitmap(CodeUtils.createQrcode("This is a qrcode")); } }
activity_image.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".ImageActivity"> <ImageView android:id="@+id/iv_barcode" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageView android:id="@+id/iv_qrcode" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
运行效果:
总结
以上所述是小编给大家介绍的Android生成条形码和二维码功能,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对我们网站的支持!
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