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package com.njupt.liyao;

import com.google.zxing.LuminanceSource; 

import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
   
import java.io.FileNotFoundException; 
   
/**
 * This class is used to help decode images from files which arrive as RGB data
 * from Android bitmaps. It does not support cropping or rotation.
 * 
 * @author [emailprotected] (Daniel Switkin)
 */ 
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,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 < height; y++) { 
            int offset = y * width; 
            for (int x = 0; x < width; x++) { 
                int pixel = pixels[offset + x]; 
                int r = (pixel >> 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 < width) { 
            row = new byte[width]; 
        } 
   
        System.arraycopy(luminances,y * width,row,width); 
        return row; 
    } 
   
    // Since this class does not support cropping,the underlying byte array 
    // already contains 
    // exactly what the caller is asking for,so give it to them without a copy. 
    @Override 
    public byte[] getMatrix() { 
        return luminances; 
    } 
   
    private static Bitmap loadBitmap(String path) throws FileNotFoundException { 
        Bitmap bitmap = BitmapFactory.decodeFile(path); 
        if (bitmap == null) { 
            throw new FileNotFoundException("Couldn't open " + path); 
        } 
        return bitmap; 
    } 
   
}

public Bitmap getTwoDimensionPicture(String text,int width,int height) throws WriterException{
        if(text.equals(""))
        {
            text=" ";
        }
        Hashtable<EncodeHintType,String> hints = new Hashtable<EncodeHintType,String>();
        hints.put(EncodeHintType.CHARACTER_SET,"utf-8");
        BitMatrix bitMatrix = new QRCodeWriter().encode(text,BarcodeFormat.QR_CODE,height,hints);
        int []pixels = new int[width*height];
        for(int y=0;y<height;y++){
            for(int x=0;x<width;x++){
                if (bitMatrix.get(x,y))
                {
                    pixels[y * width + x] = BLACK;
                }
                else
                {
                    pixels[y * width + x] = WHITE;
                }
            }
        }
        Bitmap bitmap=Bitmap.createBitmap(width,Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels,height);
        
        return bitmap;
    }

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";
    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); 
                        //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<DecodeHintType,String> hints = new HashMap<DecodeHintType,String>(); 
            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);

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