二维码发展到现在几乎是每一个App都有的功能,之前项目里用到了二维码功能就研究了下如何嵌入zxing二维码工程,之前的用法制包含了最基本的二维码扫码工能,用QQ时看到QQd的扫一扫,功能相对较全,可以扫图片,可以开闪光灯,还可以生成二维码,都是比较常用的功能,于是就仿照QQ的二维码样式和功能,自己也做了一个common工程,这样,以后要用二维码是就不必再做配置等工作了,直接关联到这个二维码工程即可.文章最后我会将整个工程上传到我的资源中，有需要的可以下载。
下面先看一下整体效果图: 点击相册后的效果图：
开灯后的效果图和设备串号生成的二维码:
由于没有美工配合,样子真心是不如QQ好看，好在功能基本都实现了，相册就是从本地图库中选去二维码扫描，开灯就是打开手机闪光灯，二维码是将手机序列号生成一个二维码。下面是代码部分，改动的地方和添加的地方都做了注释，相信大家能看懂。‘
1.相册功能添加代码，代码添加在zxing工程已有的CaptureActivity.java类中。
相册点击事件处理：
public void onClick(View v)
{
switch (v.getId())
{
case R.id.photo_btn:
// 打开手机中的相册
Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"
innerIntent.setType("image/*");
Intent wrapperIntent = Intent.createChooser(innerIntent, "选择二维码图片");
this.startActivityForResult(wrapperIntent, REQUEST_CODE);
break;
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
switch (requestCode)
{
case REQUEST_CODE:
// 获取选中图片的路径
Cursor cursor = getContentResolver().query(data.getData(), null, null, null, null);
if (cursor.moveToFirst())
{
photo_path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
}
cursor.close();
new Thread(new Runnable()
{
@Override
public void run()
{
Result result = scanningImage(photo_path);
if (result != null)
{
Message m = mHandler.obtainMessage();
m.what = PARSE_BARCODE_SUC;
m.obj = result.getText();
mHandler.sendMessage(m);
}
else
{
Message m = mHandler.obtainMessage();
m.what = PARSE_BARCODE_FAIL;
m.obj = "Scan failed!";
mHandler.sendMessage(m);
}
}
}).start();
break;
}
}
}
/**
* 扫描二维码图片的方法
*
* @param path
* @return
*/
public Result scanningImage(String path)
{
if (TextUtils.isEmpty(path))
{
return null;
}
Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF8"); // 设置二维码内容的编码
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true; // 先获取原大小
scanBitmap = BitmapFactory.decodeFile(path, options);
options.inJustDecodeBounds = false; // 获取新的大小
int sampleSize = (int) (options.outHeight / (float) 200);
if (sampleSize <= 0)
sampleSize = 1;
options.inSampleSize = sampleSize;
scanBitmap = BitmapFactory.decodeFile(path, options);
RGBLuminanceSource source = new RGBLuminanceSource(scanBitmap);
BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
QRCodeReader reader = new QRCodeReader();
try
{
return reader.decode(bitmap1, hints);
}
catch (NotFoundException e)
{
e.printStackTrace();
}
catch (ChecksumException e)
{
e.printStackTrace();
}
catch (FormatException e)
{
e.printStackTrace();
}
return null;
} /**
* 通过设置Camera打开闪光灯
*/
public void turnLightOn()
{
if (camera == null)
{
return;
}
Parameters parameters = camera.getParameters();
if (parameters == null)
{
return;
}
List<String> flashModes = parameters.getSupportedFlashModes();
if (flashModes == null)
{
return;
}
String flashMode = parameters.getFlashMode();
Log.i(TAG, "Flash mode: " + flashMode);
Log.i(TAG, "Flash modes: " + flashModes);
// 闪光灯关闭状态
if (!Parameters.FLASH_MODE_TORCH.equals(flashMode))
{
// Turn on the flash
if (flashModes.contains(Parameters.FLASH_MODE_TORCH))
{
parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(parameters);
camera.startPreview();
}
else
{
}
}
}
/**
* 通过设置Camera关闭闪光灯
* @param mCamera
*/
public void turnLightOff()
{
if (camera == null)
{
return;
}
Parameters parameters = camera.getParameters();
if (parameters == null)
{
return;
}
List<String> flashModes = parameters.getSupportedFlashModes();
String flashMode = parameters.getFlashMode();
// Check if camera flash exists
if (flashModes == null)
{
return;
}
// 闪光灯打开状态
if (!Parameters.FLASH_MODE_OFF.equals(flashMode))
{
// Turn off the flash
if (flashModes.contains(Parameters.FLASH_MODE_OFF))
{
parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
}
else
{
Log.e(TAG, "FLASH_MODE_OFF not supported");
}
}
}/***
* 获得手机设备的串号
* @param context
* @return
*/
public static String getIMEI(Context context)
{
TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
// Get deviceId
String deviceId = tm.getDeviceId();
// If running on an emulator
if (deviceId == null || deviceId.trim().length() == 0 || deviceId.matches("0+"))
{
deviceId = (new StringBuilder("EMU")).append((new Random(System.currentTimeMillis())).nextLong())
.toString();
}
return deviceId;
}
/**
* 生成二维码方法
*/
private Bitmap createQRCode()
{
int QR_WIDTH = 100;
int QR_HEIGHT = 100;
try
{
// 需要引入core包
QRCodeWriter writer = new QRCodeWriter();
String mime= getIMEI(this);
if (text == null || "".equals(text) || text.length() < 1)
{
return null;
}
// 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;
}
}
}
// cheng chen de er wei ma
Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
return bitmap;
}
catch (WriterException e)
{
e.printStackTrace();
}
return null;
}
初始工程的配置和对扫描框的修改都参考了这篇博客，大家可以看下。http://blog.csdn.net/xiaanming/article/details/10163203.
