月下载量上千次Android实现二维码生成器app源码分享

 package com.njupt.liyao; import com.google.zxing.LuminanceSource; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import java.io.FileNotFoundException; public final class RGBLuminanceSource extends LuminanceSource { private final byte[] luminances; public RGBLuminanceSource(String path) throws FileNotFoundException { this(loadBitmap(path)); } public RGBLuminanceSource(Bitmap bitmap) { super(bitmap.getWidth(), bitmap.getHeight()); int width = bitmap.getWidth(); int height = bitmap.getHeight(); int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); // In order to measure pure decoding speed, we convert the entire image // to a greyscale array // up front, which is the same as the Y channel of the // YUVLuminanceSource in the real app. luminances = new byte[width * height]; for (int y = 0; y > 16) & 0xff; int g = (pixel >> 8) & 0xff; int b = pixel & 0xff; if (r == g && g == b) { // Image is already greyscale, so pick any channel. luminances[offset + x] = (byte) r; } else { // Calculate luminance cheaply, favoring green. luminances[offset + x] = (byte) ((r + g + g + b) >> 2); } } } } @Override public byte[] getRow(int y, byte[] row) { if (y <0 || y>= getHeight()) { throw new IllegalArgumentException( "Requested row is outside the image:"+ y); } int width = getWidth(); if (row == null || row.length 

 public Bitmap getTwoDimensionPicture(String text,int width,int height) throws WriterException{ if(text.equals("")) { text=""; } Hashtable hints = new Hashtable(); hints.put(EncodeHintType.CHARACTER_SET,"utf-8"); BitMatrix bitMatrix = new QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints); int []pixels = new int[width*height]; for(int y=0;y

 public void createDirctoryToSaveImage(){ String dirPath=Environment.getExternalStorageDirectory()+File.separator+"TowDimensionCode"; File dirFile=new File(dirPath); if(!dirFile.exists()){ dirFile.mkdir(); } } public void writeBitMapToSDCard(Bitmap bitmap) throws IOException{ String fname = DateFormat.format("yyyyMMddhhmmss", new Date()).toString()+".jpg-600"; String filePath=Environment.getExternalStorageDirectory()+File.separator+"TowDimensionCode" +File.separator+fname; File file=new File(filePath); FileOutputStream fileOutputStream=new FileOutputStream(file); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream); fileOutputStream.flush(); fileOutputStream.close(); //把图片加入到系统图库里面 MediaStore.Images.Media.insertImage(getApplicationContext().getContentResolver(), file.getAbsolutePath(), fname, null); //uri得到的是文件的绝对路径 getApplicationContext().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://"+file.getAbsolutePath()))); edtText.setText(file.getAbsolutePath()); Toast.makeText(this,"生成成功", Toast.LENGTH_LONG).show(); } 

 //打开相册 private void setImage() { //使用intent调用系统提供的相册功能，使用startActivityForResult是为了获取用户选择的图片 Intent getAlbum = new Intent(Intent.ACTION_GET_CONTENT); getAlbum.setType(IMAGE_TYPE); startActivityForResult(getAlbum, IMAGE_CODE); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data){ if (resultCode != RESULT_OK) { //此处的 RESULT_OK 是系统自定义得一个常量 Log.e("TAG->onresult","ActivityResult resultCode error"); return; } Bitmap bm = null; //外界的程序访问ContentProvider所提供数据 可以通过ContentResolver接口 ContentResolver resolver = getContentResolver(); //此处的用于判断接收的Activity是不是你想要的那个 if (requestCode == IMAGE_CODE) { try { Uri originalUri = data.getData(); //获得图片的uri bm = MediaStore.Images.Media.getBitmap(resolver, originalUri); //显得到bitmap图片 imgView.setImageBitmap(bm); //这里开始的第二部分，获取图片的路径： String[] proj = {MediaColumns.DATA}; //好像是android多媒体数据库的封装接口，具体的看Android文档 Cursor cursor = managedQuery(originalUri, proj, null, null, null); //按我个人理解 这个是获得用户选择的图片的索引值 int column_index = cursor.getColumnIndexOrThrow(MediaColumns.DATA); //将光标移至开头 ，这个很重要，不小心很容易引起越界 cursor.moveToFirst(); //最后根据索引值获取图片路径 String path = cursor.getString(column_index); edtText.setText(path); btnOpen.setText(R.string.recognitionTwoCode); }catch (IOException e) { Log.e("TAG-->Error",e.toString()); } } } 

 /** * 解析二维码图片里的内容 * @param filePath 二维码图片的位置 * @throws IOException * @throws NotFoundException */ private String readImage(ImageView imageView) { String content = null; Map hints = new HashMap(); hints.put(DecodeHintType.CHARACTER_SET,"utf-8"); // 获得待解析的图片 Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap(); RGBLuminanceSource source = new RGBLuminanceSource(bitmap); BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source)); QRCodeReader reader = new QRCodeReader(); try { Result result = reader.decode(bitmap1, hints); // 得到解析后的文字 content = result.getText(); } catch (Exception e) { e.printStackTrace(); } return content; } 

 //ad布局部分 private RelativeLayout adContainer = null; private IMvBannerAd bannerad = null; final String adSpaceid ="这是你申请的广告ID号"; adContainer=(RelativeLayout)findViewById(R.id.adcontent); bannerad = Mvad.showBanner(adContainer, this, adSpaceid, false); bannerad.showAds(this);