Android中生成条形码和二维码

准备目前Google的zxing jar包不支持中文码的生成，所以本示例中也不支持中文。需要中文支持的朋友，请自行修改zxing.jar包再编译下。 废话不说，直接上效果图：

 

具体示例代码如下：

package com.test.createcode;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

/**
 * 用于创建和扫描二维码
 */
public class CreateCodeActivity  extends Activity {


    /**
     * 将要生成二维码的内容
     */
    private EditText codeEdit;

    /**
     * 生成二维码代码
     */
    private Button twoCodeBtn;
    /**
     * 用于展示生成二维码的imageView
     */
    private ImageView codeImg;

    /**
     * 生成一维码按钮
     */
    private Button oneCodeBtn;

    /**
     * 界面的初始化事件
     *
     * @param savedInstanceState Bundle对象
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super .onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initView();
        setListener();

    }

    /**
     * 用于初始化界面展示的view
     */
    private void initView() {
        codeEdit = (EditText) findViewById(R.id.code_edittext);
        twoCodeBtn = (Button) findViewById(R.id.code_btn);
        oneCodeBtn = (Button) findViewById(R.id.btn_code);
        codeImg = (ImageView) findViewById(R.id.code_img);
    }

    /**
     * 设置生成二维码和扫描二维码的事件
     */
    private void setListener() {
        twoCodeBtn.setOnClickListener( new OnClickListener() {

            @Override
            public void onClick(View v) {
                String str = codeEdit.getText().toString().trim();
                Bitmap bmp =  null ;
                try {
                    if (str !=  null && ! "" .equals(str)) {
                        bmp = CreateTwoDCode(str);
                    }
                }  catch (WriterException e) {
                    e.printStackTrace();
                }
                if (bmp !=  null ) {
                    codeImg.setImageBitmap(bmp);
                }

            }
        });


        oneCodeBtn.setOnClickListener( new OnClickListener() {
            @Override
            public void onClick(View view) {
                String str = codeEdit.getText().toString().trim();
                int size = str.length();
                for ( int i =  0 ; i < size; i++) {
                    int c = str.charAt(i);
                    if (( 19968 <= c && c <  40623 )) {
                        Toast.makeText(CreateCodeActivity. this ,  "生成条形码的时刻不能是中文" , Toast.LENGTH_SHORT).show();
                        return ;
                    }

                }
                Bitmap bmp =  null ;
                try {
                    if (str !=  null && ! "" .equals(str)) {
                        bmp = CreateOneDCode(str);
                    }
                }  catch (WriterException e) {
                    e.printStackTrace();
                }
                if (bmp !=  null ) {
                    codeImg.setImageBitmap(bmp);
                }
            }
        });
    }

    /**
     * 将指定的内容生成成二维码
     *
     * @param content 将要生成二维码的内容
     * @return 返回生成好的二维码事件
     * @throws WriterException WriterException异常
     */
    public Bitmap CreateTwoDCode(String content)  throws WriterException {
        // 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix =  new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE,  300 ,  300 );
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        // 二维矩阵转为一维像素数组,也就是一直横着排了
        int [] pixels =  new int [width * height];
        for ( int y =  0 ; y < height; y++) {
            for ( int x =  0 ; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] =  0xff000000 ;
                }
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        // 通过像素数组生成bitmap,具体参考api
        bitmap.setPixels(pixels,  0 , width,  0 ,  0 , width, height);
        return bitmap;
    }

    /**
     * 用于将给定的内容生成成一维码 注：目前生成内容为中文的话将直接报错，要修改底层jar包的内容
     *
     * @param content 将要生成一维码的内容
     * @return 返回生成好的一维码bitmap
     * @throws WriterException WriterException异常
     */
    public Bitmap CreateOneDCode(String content)  throws WriterException {
        // 生成一维条码,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix =  new MultiFormatWriter().encode(content,
                BarcodeFormat.CODE_128,  500 ,  200 );
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        int [] pixels =  new int [width * height];
        for ( int y =  0 ; y < height; y++) {
            for ( int x =  0 ; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] =  0xff000000 ;
                }
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        // 通过像素数组生成bitmap,具体参考api
        bitmap.setPixels(pixels,  0 , width,  0 ,  0 , width, height);
        return bitmap;
    }

}

main.xml文件如下：

xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
              android:orientation = "vertical" android:layout_width = "fill_parent"
              android:layout_height = "fill_parent" android:background = "#ff999999" >
    < EditText android:layout_width = "fill_parent" android:id = "@+id/code_edittext"
              android:layout_height = "wrap_content" android:text = "" />
    < LinearLayout android:layout_width = "wrap_content"
                  android:layout_height = "wrap_content" android:orientation = "horizontal"
                  android:layout_marginTop = "20dip" android:layout_gravity = "center_horizontal" >
        < Button android:id = "@+id/code_btn" android:layout_width = "100dip"
                android:layout_height = "40dip" android:text = "生成二维码" />
        < Button android:id = "@+id/btn_code" android:layout_width = "100dip" android:layout_height = "40dip"
                android:text = "生成一维码" > Button >
    LinearLayout >


    < ImageView android:layout_width = "wrap_content" android:id = "@+id/code_img"
               android:layout_height = "wrap_content" android:layout_marginTop = "20dip"
               android:layout_gravity = "center_horizontal" />
LinearLayout >

清单文件如下：

xml version = "1.0" encoding = "utf-8" ?>
< manifest xmlns:android = "http://schemas.android.com/apk/res/android"
    package = "com.test.createcode"
    android:versionCode = "1"
    android:versionName = "1.0" >

    < uses-sdk android:minSdkVersion = "10" />

    < application
        android:icon = "@drawable/ic_launcher"
        android:label = "@string/app_name" >
        < activity
            android:name = ".CreateCodeActivity"
            android:label = "@string/app_name" >
            < intent-filter >
                < action android:name = "android.intent.action.MAIN" />

                < category android:name = "android.intent.category.LAUNCHER" />
            intent-filter >
        activity >
    application >

manifest >

最后不要下载个zxing.jar放在libs文件夹中，即可。(上述的BitMatrix及BarcodeFormat等类是依赖于zxing.jar的。)

下载地址：

http://code.google.com/p/zxing/

来自：http://blog.csdn.net/chenshufei2/article/details/8682934

不明白的朋友下载我的例子：

http://download.csdn.net/detail/zhaihaohao1/8387031

我的相关文章：

http://blog.csdn.net/zhaihaohao1/article/details/42920591