月下载量上千次Android实现二维码生成器app源码分享

在360上面上线了一个月，下载量上千余次。这里把代码都分享出来，供大家学习哈！还包括教大家如何接入广告，赚点小钱花花，喜欢的帮忙顶一个，大神见了勿喷，小学僧刚学Android没多久。首先介绍这款应用：APP是一款二维码生成器，虽然如何制作二维码教程网上有很多，我这里再唠叨一下并把我的所有功能模块代码都分享出来。

在这里我们需要一个辅助类RGBLuminanceSource，这个类Google也提供了，我们直接粘贴过去就可以使用了

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 < 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, 0, 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, width, 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, height,Bitmap.Config.ARGB_8888);
 bitmap.setPixels(pixels, 0,width, 0, 0, width, 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, 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);

月下载量上千次Android实现二维码生成器app源码大家不要错过呀！