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！