Android 二维码快速生成代码

清疚 2022-08-14 03:36 221阅读 0赞

<pre name="code" class="java">看了很多人在找关于二维码生成的代码 今天就抽时间写了一下，希望对大家有所帮助！

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public class MainActivity extends Activity {
        
        private static final String TAG=MainActivity.class.getSimpleName();
        private TextView qr_text;
        private ImageView qr_image;
        
        private final int QR_WIDTH=140;
        private final int QR_HEIGHT=140;
    
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            qr_text=(TextView) findViewById(R.id.textView1);
            qr_image=(ImageView) findViewById(R.id.imageView1);
            createImage();
        }
    
    
     // 生成QR图
        private void createImage() {
            try {
                // 需要引入core包
                QRCodeWriter writer = new QRCodeWriter();
    
    
                String text = qr_text.getText().toString();
                text="黄明明";
                Log.i(TAG, "生成的文本：" + text);
                if (text == null || "".equals(text) || text.length() < 1) {
                    return;
                }
    
    
                // 把输入的文本转为二维码
                BitMatrix martix = writer.encode(text, BarcodeFormat.QR_CODE,
                        QR_WIDTH, QR_HEIGHT);
    
    
                System.out.println("w:" + martix.getWidth() + "h:"
                        + martix.getHeight());
    
    
                Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
                hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
                BitMatrix bitMatrix = new QRCodeWriter().encode(text,
                        BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
                int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
                for (int y = 0; y < QR_HEIGHT; y++) {
                    for (int x = 0; x < QR_WIDTH; x++) {
                        if (bitMatrix.get(x, y)) {
                            pixels[y * QR_WIDTH + x] = 0xff000000;
                        } else {
                            pixels[y * QR_WIDTH + x] = 0xffffffff;
                        }
    
    
                    }
                }
    
    
                Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
                        Bitmap.Config.ARGB_8888);
    
    
                bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
                qr_image.setImageBitmap(bitmap);
    
    
            } catch (WriterException e) {
                e.printStackTrace();
            }
        }
    }
    布局文件记得自己写哦哦！！！

[http://download.csdn.net/download/u012974916/8197269][http_download.csdn.net_download_u012974916_8197269]

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