Android生成条形码和二维码功能
时间：2021-10-17 09:12:15 | 栏目：Android代码 | 点击：次
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：
总结