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
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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;
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;
}
}
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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;
}
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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();
}
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//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());
}
}
}
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/**
* 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;
}
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//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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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！