参考了http://blog.csdn.net/books1958/article/details/46346531

和http://www.cnblogs.com/mythou/p/3280023.html

 

很多文章用的都是旧的，过时了，找了半天只有这两个是好用的 ==。

zing包是3.1, 链接如下  http://pan.baidu.com/s/1pKfkQVp

 

MainActivity代码如下

package com.example.wang.bmap;import com.google.zxing.*;import android.graphics.Bitmap;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.QRCodeWriter;public class MainActivity extends AppCompatActivity {    private Button genButton;    private ImageView img;    private EditText input;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // ATTENTION: This was auto-generated to implement the App Indexing API.        // See https://g.co/AppIndexing/AndroidStudio for more information.        genButton = (Button)findViewById(R.id.gen);        img = (ImageView)findViewById(R.id.img);        input = (EditText)findViewById(R.id.input);        createQR();    }    public void createQR(){        genButton.setOnClickListener(new View.OnClickListener() {                    public void onClick(View arg0) {                        String in = input.getText().toString();                        try {                            BitMatrix qrcode = new QRCodeWriter().encode(in, BarcodeFormat.QR_CODE, 400, 400);                            int[] pixels = new int[400 * 400];                            for (int y = 0; y < 400; y++) {                                for (int x = 0; x < 400; x++) {                                    if (qrcode.get(x, y)) {                                        pixels[y * 400 + x] = 0xff000000;                                    } else {                                        pixels[y * 400 + x] = 0xffffffff;                                    }                                }                            }                            Bitmap bitmap = Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888);                            bitmap.setPixels(pixels, 0, 400, 0, 0, 400, 400);                            img.setImageBitmap(bitmap);                        } catch (WriterException e) {                            e.printStackTrace();                        }                    }                }        );    }/**/}

　　

xml代码

 

大概是酱紫　　

 

 

乱码问题，直接google就各种答案，我采用的是

Hashtable hints = new Hashtable();hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");BitMatrix qrcode = new QRCodeWriter().encode(in, BarcodeFormat.QR_CODE, 400, 400,hints);

　　效果如图