android Zxing生成带有图片二维码

package request.http.com.httprequest.fragment.my;

import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.text.TextUtils;
import android.util.Base64;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

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 java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.Unbinder;
import me.nereo.multi_image_selector.MultiImageSelector;
import request.http.com.httprequest.R;
import request.http.com.httprequest.activity.MainActivity;
import request.http.com.httprequest.bean.avatarBean;
import request.http.com.httprequest.common.Tools;
import request.http.com.httprequest.fragment.main.homeMyFragment;

import static android.app.Activity.RESULT_OK;
import static android.content.Context.MODE_PRIVATE;
import static android.os.Environment.getExternalStorageDirectory;

/**
 * Date: 2019/7/15
 * Time: 17:03
 * author:Guest
 */
public class avatarFragment extends Fragment {
    @BindView(R.id.iv_qrcode)
    ImageView iv_qrcode;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_avatar , container , false);
        Unbinder unbinder = ButterKnife.bind(this,view);
        Message message = new Message();
        message.arg1 = 202;
        MainActivity.mainHandler.sendMessage(message);
        initView();
        initData();
        return view;
    }
    private  void initView(){

    }
    private void initData(){
         QRCode("https://www.baidu.com/",1900,1900);
    }

 /**
     * 生成带有图片的二维码
     * @param content
     * @param width
     * @param height
     */
    private void QRCode(String content, int width, int height) {
        try {
            //1,创建实例化对象
            QRCodeWriter writer = new QRCodeWriter() ;
            //2,设置字符集
            Map<EncodeHintType, String> map = new HashMap<EncodeHintType, String>();
            map.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            //3，通过encode方法将内容写入矩阵对象
            BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height,map);
            //4，定义一个二维码像素点的数组，向每个像素点中填充颜色
            int[] pixels = new int[width*height];
            //5,往每一像素点中填充颜色（像素没数据则用黑色填充，没有则用彩色填充，不过一般用白色）
            for (int i = 0; i < height; i++) {
                for (int j = 0; j < width; j++) {
                    if (matrix.get(j, i)) {
                        pixels[i*width+j] = 0xff000000;
                    }else {
                        pixels[i*width+j] = 0xffffffff;
                    }
                }
            }
            //6,创建一个指定高度和宽度的空白bitmap对象
            Bitmap bm_QR = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            //7，将每个像素的颜色填充到bitmap对象
            bm_QR.setPixels(pixels, 0, width, 0, 0, width, height);
            //8，创建一个bitmap对象用于作为其图标
              Bitmap    bm_login = BitmapFactory.decodeResource(getResources(), R.mipmap.chat_friends_person8);
            //9，创建一个方法在二维码上添加一张图片
            if (addLogin(bm_QR,bm_login) != null) {
                iv_qrcode.setImageBitmap(addLogin(bm_QR,bm_login));
            }

        } catch (WriterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /**
     * 用于向创建的二维码中添加一个logn
     * @param bm_QR
     * @param bm_login
     * @return
     */
    private Bitmap addLogin(Bitmap bm_QR, Bitmap bm_login) {
        if (bm_QR == null) {
            return null;
        }
        if (bm_login == null) {
            return bm_QR ;
        }
        //获取图片的宽高
        int bm_QR_Width = bm_QR.getWidth() ;
        int bm_QR_Height = bm_QR.getHeight();
        int bm_login_Width = bm_login.getWidth() ;
        int bm_login_Height = bm_login.getHeight();

        //设置logn的大小为二维码整体大小的1/5
        float scale_login = bm_QR_Width*1.0f /5/bm_login_Width ;
        Bitmap bitmap = Bitmap.createBitmap(bm_QR_Width, bm_QR_Height, Bitmap.Config.ARGB_8888);

        try {
            Canvas canvas = new Canvas(bitmap);
            canvas.drawBitmap(bm_QR, 0, 0, null);
            canvas.scale(scale_login, scale_login, bm_QR_Width / 2, bm_QR_Height / 2);
            canvas.drawBitmap(bm_login, (bm_QR_Width - bm_login_Width) / 2, (bm_QR_Height - bm_login_Height) / 2, null);
            canvas.save(Canvas.ALL_SAVE_FLAG);
            canvas.restore();
        } catch (Exception e) {
            bitmap = null;
            e.getStackTrace();
        }
        return bitmap;

    }


    /**
     * 生成没有图片的二维码
     * @param content: 地址，生成二维码地址
     * @param width：二维码的宽度
     * @param height：二维码的高度
     */
    private void QRCode(String content, int width, int height) {

        try {
            //1,创建实例化对象
            QRCodeWriter writer = new QRCodeWriter() ;
            //2,设置字符集
            Map<EncodeHintType, String> map = new HashMap<EncodeHintType, String>();
            map.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            //3，通过encode方法将内容写入矩阵对象
            BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height,map);
            //4，定义一个二维码像素点的数组，向每个像素点中填充颜色
            int[] pixels = new int[width*height];
            //5,往每一像素点中填充颜色（像素没数据则用黑色填充，没有则用彩色填充，不过一般用白色）
            for (int i = 0; i < height; i++) {
                for (int j = 0; j < width; j++) {
                    if (matrix.get(j, i)) {
                        pixels[i*width+j] = 0xff000000;
                    }else {
                        pixels[i*width+j] = 0xffffffff;
                    }
                }
            }
            //6,创建一个指定高度和宽度的空白bitmap对象
            Bitmap bm_QR = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            //7，将每个像素的颜色填充到bitmap对象
            bm_QR.setPixels(pixels, 0, width, 0, 0, width, height);
            iv_qrcode.setImageBitmap(bm_QR);
        } catch (WriterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}