二维码

http://blog.csdn.net/xiaorenwu1206/article/details/38684983

 主Activity：

package com.androidzhang.zxingframe;

import android.app.Activity;

import android.content.Intent;

import android.graphics.Bitmap;

import android.net.Uri;

import android.os.Bundle;

import android.util.DisplayMetrics;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import com.google.zxing.WriterException;

import com.zxing.activity.CaptureActivity;

public class ZxingFrame extends Activity {

 private EditText resultTextView;

 private Button scanBarCodeButton;

 private ImageView iv_qr_image;

 protected int mScreenWidth ;

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_zxing_frame);

  resultTextView = (EditText) this.findViewById(R.id.scan_result);

  scanBarCodeButton = (Button) this.findViewById(R.id.bt_bigin_scan);

  iv_qr_image = (ImageView)findViewById(R.id.iv_qr_image);

  

  DisplayMetrics dm = new DisplayMetrics();

  getWindowManager().getDefaultDisplay().getMetrics(dm);

  mScreenWidth = dm.widthPixels;

  

  scanBarCodeButton.setOnClickListener(new OnClickListener() {

   @Override

   public void onClick(View v) {

    // 调用ZXIng开源项目源码  扫描二维码

    Intent openCameraIntent = new Intent(ZxingFrame.this,

      CaptureActivity.class);

    startActivityForResult(openCameraIntent, 0);

   }

  });

 }

 @Override

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {

  super.onActivityResult(requestCode, resultCode, data);

  // 取得返回信息

  if (resultCode == RESULT_OK) {

   Bundle bundle = data.getExtras();

   String scanResult = bundle.getString("result");

   resultTextView.setText(scanResult);

  }

 }

 //调用浏览器打开，功能尚未完善、、、

 public void checkResult(View v){

  String result = resultTextView.getText().toString();

// Intent intent = new Intent(ZxingFrame.this,

// CheckResult.class);

// intent.putExtra("result", result);

// startActivity(intent);

  

  Intent i= new Intent();          

        i.setAction("android.intent.action.VIEW");      

        Uri content_url = Uri.parse(result);     

        i.setData(content_url);             

        i.setClassName("com.android.browser","com.android.browser.BrowserActivity");     

        startActivity(i);

}

 //生成二维码

 public void Create2QR(View v){

  String uri = resultTextView.getText().toString();

// Bitmap bitmap = BitmapUtil.create2DCoderBitmap(uri, mScreenWidth/2, mScreenWidth/2);

  Bitmap bitmap;

  try {

   bitmap = BitmapUtil.createQRCode(uri, mScreenWidth);

   

   if(bitmap != null){

    iv_qr_image.setImageBitmap(bitmap);

   }

   

  } catch (WriterException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

  }

  

  

 }

}

这里扫描二维码需要用到的结果

/**

  * Handler scan result

  * 

  * @param result

  * @param barcode

  *            获取结果

  */

 public void handleDecode(Result result, Bitmap barcode) {

  inactivityTimer.onActivity();

  playBeepSoundAndVibrate();

  String resultString = result.getText();

  // FIXME

  if (resultString.equals("")) {

   Toast.makeText(CaptureActivity.this, "扫描失败!", Toast.LENGTH_SHORT)

     .show();

  } else {

   // System.out.println("Result:"+resultString);

   Intent resultIntent = new Intent();

   Bundle bundle = new Bundle();

   bundle.putString("result", resultString);

   resultIntent.putExtras(bundle);

   this.setResult(RESULT_OK, resultIntent);

  }

  CaptureActivity.this.finish();

 }

// 是否开启闪光灯

 public void IfOpenLight(View v) {

  ifOpenLight++;

  switch (ifOpenLight % 2) {

  case 0:

   // 关闭

   CameraManager.get().closeLight();

   break;

  case 1:

   // 打开

   CameraManager.get().openLight(); // 开闪光灯

   break;

  default:

   break;

  }

 }

/*

  * 获取带二维码的相片进行扫描

  */

 public void pickPictureFromAblum(View v) {

  // 打开手机中的相册

  Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"

  innerIntent.setType("image/*");

  Intent wrapperIntent = Intent.createChooser(innerIntent, "选择二维码图片");

  this.startActivityForResult(wrapperIntent, 1);

 }

 String photo_path;

 ProgressDialog mProgress;

 Bitmap scanBitmap;

 /*

  * (non-Javadoc)

  * 

  * @see android.app.Activity#onActivityResult(int, int,

  * android.content.Intent) 对相册获取的结果进行分析

  */

 @Override

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {

  // TODO Auto-generated method stub

  if (resultCode == RESULT_OK) {

   switch (requestCode) {

   case 1:

    // 获取选中图片的路径

    Cursor cursor = getContentResolver().query(data.getData(),

      null, null, null, null);

    if (cursor.moveToFirst()) {

     photo_path = cursor.getString(cursor

       .getColumnIndex(MediaStore.Images.Media.DATA));

     Log.i("路径", photo_path);

    }

    cursor.close();

    mProgress = new ProgressDialog(CaptureActivity.this);

    mProgress.setMessage("正在扫描...");

    mProgress.setCancelable(false);

    mProgress.show();

    new Thread(new Runnable() {

     @Override

     public void run() {

      Result result = scanningImage(photo_path);

      if (result != null) {

       Message m = mHandler.obtainMessage();

       m.what = 1;

       m.obj = result.getText();

       mHandler.sendMessage(m);

      } else {

       Message m = mHandler.obtainMessage();

       m.what = 2;

       m.obj = "Scan failed!";

       mHandler.sendMessage(m);

      }

     }

    }).start();

    break;

   default:

    break;

   }

  }

  super.onActivityResult(requestCode, resultCode, data);

 }

 final Handler mHandler = new Handler() {

  @Override

  public void handleMessage(Message msg) {

   // TODO Auto-generated method stub

   switch (msg.what) {

   case 1:

    mProgress.dismiss();

    String resultString = msg.obj.toString();

    if (resultString.equals("")) {

     Toast.makeText(CaptureActivity.this, "扫描失败!",

       Toast.LENGTH_SHORT).show();

    } else {

     // System.out.println("Result:"+resultString);

     Intent resultIntent = new Intent();

     Bundle bundle = new Bundle();

     bundle.putString("result", resultString);

     resultIntent.putExtras(bundle);

     CaptureActivity.this.setResult(RESULT_OK, resultIntent);

    }

    CaptureActivity.this.finish();

    break;

   case 2:

    mProgress.dismiss();

    Toast.makeText(CaptureActivity.this, "解析错误！", Toast.LENGTH_LONG)

      .show();

    break;

   default:

    break;

   }

   super.handleMessage(msg);

  }

 };

 /**

  * 扫描二维码图片的方法

  * 

  * 目前识别度不高，有待改进

  * 

  * @param path

  * @return

  */

 public Result scanningImage(String path) {

  if (TextUtils.isEmpty(path)) {

   return null;

  }

  Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();

  hints.put(DecodeHintType.CHARACTER_SET, "UTF8"); // 设置二维码内容的编码

  BitmapFactory.Options options = new BitmapFactory.Options();

  options.inJustDecodeBounds = true; // 先获取原大小

  scanBitmap = BitmapFactory.decodeFile(path, options);

  options.inJustDecodeBounds = false; // 获取新的大小

  int sampleSize = (int) (options.outHeight / (float) 100);

  if (sampleSize <= 0)

   sampleSize = 1;

  options.inSampleSize = sampleSize;

  scanBitmap = BitmapFactory.decodeFile(path, options);

  RGBLuminanceSource source = new RGBLuminanceSource(scanBitmap);

  BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));

  QRCodeReader reader = new QRCodeReader();

  try {

   return reader.decode(bitmap1, hints);

  } catch (NotFoundException e) {

   e.printStackTrace();

  } catch (ChecksumException e) {

   e.printStackTrace();

  } catch (FormatException e) {

   e.printStackTrace();

  }

  return null;

 }

生成二维码： 

package com.androidzhang.zxingframe;

import java.util.Hashtable;

import android.graphics.Bitmap;

import android.util.Log;

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.QRCodeWriter;

public class BitmapUtil {

 /**

  * 生成一个二维码图像

  * 

  * @param url

  *            传入的字符串，通常是一个URL

  * @param QR_WIDTH

  *            宽度（像素值px）

  * @param QR_HEIGHT

  *            高度（像素值px）

  * @return

  */

 public static final Bitmap create2DCoderBitmap(String url, int QR_WIDTH,

   int QR_HEIGHT) {

  try {

   // 判断URL合法性

   if (url == null || "".equals(url) || url.length() < 1) {

    return null;

   }

   Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();

   hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

   // 图像数据转换，使用了矩阵转换

   BitMatrix bitMatrix = new QRCodeWriter().encode(url,

     BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);

   int[] pixels = new int[QR_WIDTH * QR_HEIGHT];

   // 下面这里按照二维码的算法，逐个生成二维码的图片，

   // 两个for循环是图片横列扫描的结果

   for (int y = 0; y < QR_HEIGHT; y++) {

    for (int x = 0; x < QR_WIDTH; x++) {

     if (bitMatrix.get(x, y)) {

      pixels[y * QR_WIDTH + x] = 0xff000000;

     } else {

      pixels[y * QR_WIDTH + x] = 0xffffffff;

     }

    }

   }

   // 生成二维码图片的格式，使用ARGB_8888

   Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,

     Bitmap.Config.ARGB_8888);

   bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);

   // 显示到一个ImageView上面

   // sweepIV.setImageBitmap(bitmap);

   return bitmap;

  } catch (WriterException e) {

   Log.i("log", "生成二维码错误" + e.getMessage());

   return null;

  }

 }

 private static final int BLACK = 0xff000000;

 /**

  * 生成一个二维码图像

  * 

  * @param url

  *            传入的字符串，通常是一个URL

  * @param widthAndHeight

  *           图像的宽高

  * @return

  */

 public static Bitmap createQRCode(String str, int widthAndHeight)

   throws WriterException {

  Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();

  hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

  BitMatrix matrix = new MultiFormatWriter().encode(str,

    BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);

  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] = BLACK;

    }

   }

  }

  Bitmap bitmap = Bitmap.createBitmap(width, height,

    Bitmap.Config.ARGB_8888);

  bitmap.setPixels(pixels, 0, width, 0, 0, width, height);

  return bitmap;

 }

}