Android生成条形码和二维码功能

砸漏

发布于 2020-10-16 10:49:29

1.5K0

发布于 2020-10-16 10:49:29

文章被收录于专栏：恩蓝脚本

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, 0, width, 0, 0, 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, 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, y) ? 0xff000000 : 0xFFFFFFFF;
        }
      }
      Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
      bitmap.setPixels(pixels, 0, width, 0, 0, width, 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：