get zxing data into swipe view fragment

问题

I am using zxing in a fragment of viewpager tab. I can call zxing with Intent and read the QR code but I can't get result to a edittext.

This is where i create tab in FragmentPagerAdapter:

@Override
    public Fragment getItem(int i) {
        switch (i) {
        case 0:
            return new Tab1();
        case 1:
            return new Tab2();
        default:
            return new EmptyTab();
        }
    }

And my Tab1 class:

public class Tab1 extends Fragment {
@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.tab_1, container, false);
        IDEditText = (EditText) rootView.findViewById(R.id.fttx_id_editText);

        Button scanBarcode = (Button) rootView.findViewById(R.id.scan_barcode);

        scanBarcode.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                IntentIntegrator scanIntegrator = new IntentIntegrator(getActivity);
                scanIntegrator.initiateScan();
            }
        });

        return rootView;
    }



    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        // retrieve scan result
        IntentResult scanningResult = IntentIntegrator.parseActivityResult(
                requestCode, resultCode, intent);
        if (scanningResult != null) {
            // we have a result
            String scanContent = scanningResult.getContents();
            IDEditText .setText("CONTENT: " + scanContent);
        } else {
            Toast.makeText(getActivity(),
                    "No scan data received!", Toast.LENGTH_SHORT).show();
        }
    }

zxing starts; then reads; then ends; but with no scan data: I think 'onActivityResult' never starts :(

How can i use zxing in this fragment?

回答1:

IntentIntegrator has another constructor, taking the Fragment. Instead of:

scanBarcode.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        IntentIntegrator scanIntegrator = new IntentIntegrator(getActivity());
        scanIntegrator.initiateScan();
    }
});

you can use:

scanBarcode.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        IntentIntegrator scanIntegrator = new IntentIntegrator(Tab1.this);
        scanIntegrator.initiateScan();
    }
});

and it should invoke onActivityResult for the Fragment directly.

An example showing working usage of both starting the intent from an Activity and from a Fragment, with the barcode scanner installed, is demonstrated in this GitHub repo.

If you are using the v4 support library Fragments, the IntentIntegratorSupportV4 class provides compatibility:

IntentIntegrator scanIntegrator = new IntentIntegratorSupportV4(Tab1.this);

回答2:

add this to your manifest

    <!-- Zxing scan activity -->
    <activity
        android:name="com.google.zxing.client.android.CaptureActivity"
        android:configChanges="orientation|keyboardHidden"
        android:screenOrientation="landscape"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
        android:windowSoftInputMode="stateAlwaysHidden" >
    </activity>

and then change the onclick method to this

    Intent intent = new Intent(context, CaptureActivity.class);
    intent.setAction("com.google.zxing.client.android.SCAN");
    // this stops saving ur barcode in barcode scanner app's
    // history
    intent.putExtra("SAVE_HISTORY", false);
    startActivityForResult(intent, 0);

and finally change the on result to this

if(requestCode==0)
    if(resultCode==Activity.RESULT_OK){
         Toast.makeText(getActivity(),"Scan Result = " + data.getStringExtra("SCAN_RESULT"),
             Toast.LENGTH_SHORT).show();
    }

回答3:

For newer Zxing BarcodeScanner library. IntentIntegratorSupportV4(Fragment.this) is not available. You can use this.

IntentIntegrator integrator = IntentIntegrator.forSupportFragment(Fragment.this);
 integrator.initiateScan();

来源：https://stackoverflow.com/questions/27680863/get-zxing-data-into-swipe-view-fragment

标签

android

android-fragments

zxing