Zxing二维码扫描生成

1.导入 zxinglib包

//扫描按钮

public void scannner(View view){

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

startActivityForResult(openCamera,0);

}

//生成二维码按钮

public void gener_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 void onActivityResult(int requestCode, int resultCode, 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 static Bitmap addLogo(Bitmap src, Bitmap logo) {

if (src == null) {

return null;

}

if (logo == null) {

return src;

}

//获取图片的宽高

int srcWidth = src.getWidth();

int srcHeight = src.getHeight();

int logoWidth = logo.getWidth();

int logoHeight = logo.getHeight();

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

return null;

}

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

return src;

}

//logo大小为二维码整体大小的1/5

float scaleFactor = srcWidth * 1.0f / 5 / logoWidth;

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

try {

Canvas canvas = new Canvas(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();

}

return bitmap;

}