Zxing二维码扫描生成

1.导入 zxinglib包

//扫描按钮

public voidscannner(View view){

Intent openCamera =newIntent(this,CaptureActivity.class);

startActivityForResult(openCamera,0);

}

//生成二维码按钮

public voidgener_pic(View view){

String contentString ="22222";

if(!contentString.equals("")) {

//根据字符串生成二维码图片并显示在界面上，第二个参数为图片的大小（350*350）

Bitmap qrCodeBitmap =null;

try{

qrCodeBitmap = BitmapUtils.create2DCode(contentString);

}catch(WriterException e) {

e.printStackTrace();

}

gen_id.setImageBitmap(qrCodeBitmap);

}

}

//扫描回传

@Override

protected voidonActivityResult(intrequestCode, intresultCode,Intent data) {

super.onActivityResult(requestCode,resultCode,data);

if(resultCode==RESULT_OK){

Bundle bundle = data.getExtras();

String result = bundle.getString("result");

result_button_view.setText(result);

// gen_id.setImageBitmap((Bitmap) data.getParcelableExtra("bitmap"));

}

// 通过像素数组生成bitmap,具体参考api

bitmap.setPixels(pixels,0,width,0,0,width,height);

下面添加：

if(logoBm !=null) {

bitmap =addLogo(bitmap,logoBm);

}

在BitmapUtils中添加方法

/**

* 在二维码中间添加Logo图案

*/

private staticBitmapaddLogo(Bitmap src,Bitmap logo) {

if(src ==null) {

return null;

}

if(logo ==null) {

returnsrc;

}

//获取图片的宽高

intsrcWidth = src.getWidth();

intsrcHeight = src.getHeight();

intlogoWidth = logo.getWidth();

intlogoHeight = logo.getHeight();

if(srcWidth ==0 || srcHeight ==0) {

return null;

}

if(logoWidth ==0 || logoHeight ==0) {

returnsrc;

}

//logo大小为二维码整体大小的1/5

floatscaleFactor = srcWidth *1.0f/ 5 / logoWidth;

Bitmap bitmap = Bitmap.createBitmap(srcWidth,srcHeight,Bitmap.Config.ARGB_8888);

try{

Canvas canvas =newCanvas(bitmap);

canvas.drawBitmap(src,0,0, null);

canvas.scale(scaleFactor,scaleFactor,srcWidth /2,srcHeight /2);

canvas.drawBitmap(logo,(srcWidth - logoWidth) /2,(srcHeight - logoHeight) /2, null);

canvas.save(Canvas.ALL_SAVE_FLAG);

canvas.restore();

}catch(Exception e) {

bitmap =null;

e.getStackTrace();

}

returnbitmap;

}