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   源码介绍

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package com.example.qr_code;


import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageView;

public class MainActivity extends Activity {

    private EditText et_only_company;
	private EditText et_only_position;
	private EditText et_only_phone;
	private EditText et_only_email;
	private EditText et_only_web1;
	private EditText et_only_add;
	private EditText et_only_note;
	private EditText et_only_name;


	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_only_name =(EditText) findViewById(R.id.et_only_name); 
		et_only_company =(EditText) findViewById(R.id.et_only_company);
		et_only_position =(EditText) findViewById(R.id.et_only_position); 
		et_only_phone=(EditText) findViewById(R.id.et_only_phone);
		et_only_email =(EditText) findViewById(R.id.et_only_email);
		et_only_web1 =(EditText) findViewById(R.id.et_only_web1); 
		et_only_add=(EditText) findViewById(R.id.et_only_add);
		et_only_note=(EditText) findViewById(R.id.et_only_note);
		
		findViewById(R.id.but).setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				String name = et_only_name.getText().toString().trim() ;
				String company=et_only_company.getText().toString().trim() ;
				String position = et_only_position.getText().toString().trim()  ; 
			    String phone =et_only_phone .getText().toString().trim() ; 
				String email = et_only_email.getText().toString().trim() ;
				String web1 = et_only_web1.getText().toString().trim() ; 
				String add =et_only_add.getText().toString().trim() ; 
				String note = et_only_note.getText().toString().trim() ; 
				String contents= "BEGIN:VCARD\nVERSION:3.0\n" "N:" name "\nORG:" company "\nTITLE:" position "\nNOTE:" note  "\nTEL:" phone "\nADR:" add "\nURL:" web1 "\nEMAIL:" email "\nEND:VCARD";
			try {
				Bitmap bm=      qr_code(contents, BarcodeFormat.QR_CODE);
				
		ImageView img=		(ImageView)findViewById(R.id.img_only) ;
		
		img.setImageBitmap(bm);
			} catch (WriterException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} 
				
			}
		});
		
    }


	public Bitmap qr_code(String string, BarcodeFormat format)
			throws WriterException {
		MultiFormatWriter writer = new MultiFormatWriter();
		Hashtable<EncodeHintType, String> hst = new Hashtable<EncodeHintType, String>();
		hst.put(EncodeHintType.CHARACTER_SET, "UTF-8");
		BitMatrix matrix = writer.encode(string, format, 400, 400, hst);
		int width = matrix.getWidth();
		int height = matrix.getHeight();
		int[] pixels = new int[width * height];
		for (int y = 0; y < height; y  ) {
			for (int x = 0; x < width; x  ) {
				if (matrix.get(x, y)) {
					pixels[y * width   x] = 0xff000000;
				}

			}
		}
		Bitmap bitmap = Bitmap.createBitmap(width, height,
				Bitmap.Config.ARGB_8888);
		// 通过像素数组生成bitmap,具体参考api
		bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
		return bitmap;
	}
    
}