Android应用--QR的生成（二维码）

二维码的定义：

二维码（2-dimensional bar code），是用某种特定的几何图形按一定规律在平面（二维方向上）分布的黑白相间的图形记录数据符号信息的。

在许多种类的二维条码中，常用的码制有：Data Matrix, Maxi Code, Aztec, QR Code, Vericode, PDF417, Ultracode, Code 49, Code 16K等。
1.堆叠式/行排式二维条码，如，Code 16K、Code 49、PDF417（如下图）等。

package com.ericssonlabs;

import com.google.zxing.WriterException;
import com.zxing.activity.CaptureActivity;
import com.zxing.encoding.EncodingHandler;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class BarCodeTestActivity extends Activity {
/** Called when the activity is first created. */
private TextView resultTextView;
private EditText qrStrEditText;
private ImageView qrImgImageView;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

resultTextView = (TextView) this.findViewById(R.id.tv_scan_result);
qrStrEditText = (EditText) this.findViewById(R.id.et_qr_string);
qrImgImageView = (ImageView) this.findViewById(R.id.iv_qr_image);

Button scanBarCodeButton = (Button) this.findViewById(R.id.btn_scan_barcode);
scanBarCodeButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Intent openCameraIntent = new Intent(BarCodeTestActivity.this,CaptureActivity.class);
startActivityForResult(openCameraIntent, 0);
}
});

Button generateQRCodeButton = (Button) this.findViewById(R.id.btn_add_qrcode);
generateQRCodeButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
try {
String contentString = qrStrEditText.getText().toString();
if (!contentString.equals("")) {
Bitmap qrCodeBitmap = EncodingHandler.createQRCode(contentString, 350);
qrImgImageView.setImageBitmap(qrCodeBitmap);
}else {
Toast.makeText(BarCodeTestActivity.this, "Text can not be empty", Toast.LENGTH_SHORT).show();
}

} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
Bundle bundle = data.getExtras();
String scanResult = bundle.getString("result");
resultTextView.setText(scanResult);
}
}
}

View Code

下面给出Demo的下载地址（注：下载前需注册第三方网站会员）：

http://download.csdn.net/detail/dlutbrucezhang/5066053

或

下载源代码：点击这里http://code.google.com/p/zxing/downloads/detail?name=ZXing-1.6.zip&can=2&q=