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我想制作一个QR码扫描仪,在一个片段中打开,我正在使用zxing库来这样做。现在我可以成功打开相机扫描QR码了。但是,因为我正在使用意图打开相机,所以它会打开另一个活动。我想要做的是在片段内打开相机,并只在屏幕的中间部分。我相信表面观和摄像头预览可以帮助我这样做,但我不知道如何实现它打开相机在屏幕中间的Android QR代码
public class QRscanner extends Fragment {
private IntentIntegrator qrScan;
public QRscanner() {
}
public static QRscanner newInstance(String text){
Bundle args = new Bundle();
QRscanner qrScanner = new QRscanner();
qrScanner.setArguments(args);
return qrScanner;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.qr_scanner, container, false);
IntentIntegrator qrScan = new IntentIntegrator(getActivity());
qrScan.initiateScan();
return rootView;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if (result != null) {
//if qrcode has nothing in it
if (result.getContents() == null) {
Toast.makeText(getActivity(), "Result Not Found", Toast.LENGTH_LONG).show();
} else {
//if qr contains data
try {
//converting the data to json
JSONObject obj = new JSONObject(result.getContents());
String testing = obj.getString("test");
System.out.println(testing);
//setting values to textviews
} catch (JSONException e) {
e.printStackTrace();
//if control comes here
//that means the encoded format not matches
//in this case you can display whatever data is available on the qrcode
//to a toast
Toast.makeText(getActivity(), result.getContents(), Toast.LENGTH_LONG).show();
}
}
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
您可以使用以下库:https://github.com/nipun-birla/QRReaderView –