zxing二维码扫描

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compile 'com.google.zxing:core:3.2.1'

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case R.id.qrcode_dencode: //扫描
intent = new Intent(MainActivity.this, CaptureActivity.class);
startActivityForResult(intent, REQUEST_CODE);
break;

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@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) { //RESULT_OK = -1Bundle bundle = data.getExtras();
String scanResult = bundle.getString("result");
Toast.makeText(MainActivity.this, scanResult, Toast.LENGTH_LONG).show();
}
}

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case R.id.qrcode_encode: //生成
try {
Bitmap mBitmap = QRCodeEncoder.encodeAsBitmap("http://wuxiaolong.me/", 300);
qrcodeImg.setImageBitmap(mBitmap);

} catch (Exception e) {
e.printStackTrace();
}
break;

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//长按图片识别二维码
qrcodeImg.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
qrcodeImg.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(qrcodeImg.getDrawingCache());
qrcodeImg.setDrawingCacheEnabled(false);
decodeQRCode(bitmap);
return true;
}
});

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/**
* 解析二维码图片
*
* @param bitmap   要解析的二维码图片
*/
public final Map<DecodeHintType, Object> HINTS = new EnumMap<>(DecodeHintType.class);

public void decodeQRCode(final Bitmap bitmap) {
new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
try {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int[] pixels = new int[width * height];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
Result result = new MultiFormatReader().decode(new BinaryBitmap(new HybridBinarizer(source)), HINTS);
return result.getText();
} catch (Exception e) {
return null;
}
}

@Override
protected void onPostExecute(String result) {
Log.d("wxl", "result=" + result);
Toast.makeText(MainActivity.this, result, Toast.LENGTH_LONG).show();
}
}.execute();

}