android利用ZXing生成二维码

此项目源码地址：请点击这里

项目中需要，稍微研究了一下，当然是利用谷歌的zxing进行生成的。
需要加入此依赖：

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.android.support:design:24.2.1'
    compile 'com.google.zxing:core:3.3.0'
}

当时搜jcenter中有好多，加入这一个就可以了
看一下qrcode工具类，这里是仿照谷歌项目中写的，查了查资料基本都是这么写的

package com.fanyafeng.barcode.util;

import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import java.util.Hashtable;

/**
 * Author： fanyafeng
 * Data： 16/12/1 13:41
 * Email: fanyafeng@live.cn
 */
public class QRCode {
    //宽度值，影响中间图片大小
    private static int IMAGE_HALFWIDTH = 50;

    //生成二维码，默认大小500*500，网址，汉字
    public static Bitmap createQRCode(String text) {
        return createQRCode(text, 500);
    }

    /**
 * 生成二维码，不带logo
 *
 * @param text
 * @param size
 * @return
 */
    public static Bitmap createQRCode(String text, int size) {
        try {
            Hashtable hints = new Hashtable<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            BitMatrix bitMatrix = new QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, size, size, hints);
            int[] pixels = new int[size * size];
            for (int y = 0; y                 for (int x = 0; x                     if (bitMatrix.get(x, y)) {
                        pixels[y * size + x] = 0xff000000;
                    } else {
                        pixels[y * size + x] = 0xffffffff;
                    }
                }
            }
            Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
            bitmap.setPixels(pixels, 0, size, 0, 0, size, size);
            return bitmap;
        } catch (WriterException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Bitmap createQRCodeWithLogo(String text, Bitmap bitmap) {
        return createQRCodeWithLogo(text, 500, bitmap);
    }

    public static Bitmap createQRCodeWithLogo(String text, int size, Bitmap bitmap) {
        try {
            IMAGE_HALFWIDTH = size / 10;
            Hashtable hints = new Hashtable<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
            BitMatrix bitMatrix = new QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, size, size, hints);

            int width = bitMatrix.getWidth();
            int height = bitMatrix.getHeight();
            int halfW = width / 2;
            int halfH = height / 2;

            Matrix m = new Matrix();
            float sx = (float) 2 * IMAGE_HALFWIDTH / bitmap.getWidth();
            float sy = (float) 2 * IMAGE_HALFWIDTH / bitmap.getHeight();
            m.setScale(sx, sy);
            bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, false);

            int[] pixels = new int[size * size];
            for (int y = 0; y                 for (int x = 0; x                     if (x > halfW - IMAGE_HALFWIDTH && x                             y > halfH - IMAGE_HALFWIDTH && y                         pixels[y * width + x] = bitmap.getPixel(x - halfW + IMAGE_HALFWIDTH, y - halfH + IMAGE_HALFWIDTH);
                    } else {
                        if (bitMatrix.get(x, y)) {
                            pixels[y * size + x] = 0xff000000;
                        } else {
                            pixels[y * size + x] = 0xffffffff;
                        }
                    }
                }
            }
            Bitmap bitmap1 = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
            bitmap1.setPixels(pixels, 0, size, 0, 0, size, size);
            return bitmap1;
        } catch (WriterException e) {
            e.printStackTrace();
            return null;
        }
    }
}

二维码的生成使用这个工具类就可以了：

package com.fanyafeng.barcode.activity;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;

import com.fanyafeng.barcode.R;
import com.fanyafeng.barcode.BaseActivity;
import com.fanyafeng.barcode.util.QRCode;
import com.google.zxing.common.StringUtils;

//需要搭配baseactivity，这里默认为baseactivity,并且默认Baseactivity为包名的根目录
public class MainActivity extends BaseActivity {
    private ImageView ivBarCode;
    private ImageView ivLogoBarCode;

    private EditText etInputMessage;
    private ImageView ivCreateCode;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//这里默认使用的是toolbar的左上角标题，如果需要使用的标题为中心的采用下方注释的代码，将此注释掉即可
        title = getString(R.string.app_name);
        isSetNavigatiOnIcon= false;

        initView();
        initData();
    }


    //初始化UI空间
    private void initView() {
        ivBarCode = (ImageView) findViewById(R.id.ivBarCode);
        ivLogoBarCode = (ImageView) findViewById(R.id.ivLogoBarCode);

        etInputMessage = (EditText) findViewById(R.id.etInputMessage);
        ivCreateCode = (ImageView) findViewById(R.id.ivCreateCode);
    }

    //初始化数据
    private void initData() {
        Bitmap bitmap = QRCode.createQRCode("樊亚风", 500);
        ivBarCode.setImageBitmap(bitmap);

        Bitmap bitmap1 = QRCode.createQRCodeWithLogo("http://news.ifeng.com/a/20161201/50345907_0.shtml", 500, BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
        ivLogoBarCode.setImageBitmap(bitmap1);
    }

    @Override
    public void onClick(View v) {
        super.onClick(v);
        switch (v.getId()) {
            case R.id.btnScanCode:
                startActivity(new Intent(this, ScanCodeActivity.class));
                break;
            case R.id.btnCreateCode:
                String inputString = etInputMessage.getText().toString().trim();
                if (inputString != null && !inputString.equals("")) {
                    Bitmap bitmap = QRCode.createQRCode(inputString, 500);
                    ivCreateCode.setImageBitmap(bitmap);
                }
                break;
        }
    }
}