Android生成条形码和二维码功能

2019-12-12 00:04:34

字体：大中小

来源：转载

供稿：网友

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.javapublic 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：