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Merge pull request #26 from m2049r/feature_qr
QR Scanning incl. payment id
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131 changes: 131 additions & 0 deletions
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app/src/main/java/com/m2049r/xmrwallet/ScannerFragment.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * Copyright (c) 2017 dm77, m2049r | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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|
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| package com.m2049r.xmrwallet; | ||
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| import android.app.Fragment; | ||
| import android.content.Context; | ||
| import android.os.Bundle; | ||
| import android.os.Handler; | ||
| import android.util.Log; | ||
| import android.view.LayoutInflater; | ||
| import android.view.View; | ||
| import android.view.ViewGroup; | ||
| import android.widget.Toast; | ||
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|
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| import com.google.zxing.BarcodeFormat; | ||
| import com.google.zxing.Result; | ||
| import com.m2049r.xmrwallet.model.WalletManager; | ||
| import com.m2049r.xmrwallet.util.Helper; | ||
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|
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| import me.dm7.barcodescanner.zxing.ZXingScannerView; | ||
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| public class ScannerFragment extends Fragment implements ZXingScannerView.ResultHandler { | ||
| static final String TAG = "ScannerFragment"; | ||
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| Listener activityCallback; | ||
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| public interface Listener { | ||
| void onAddressScanned(String address, String paymentId); | ||
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| boolean isPaymentIdValid(String paymentId); | ||
| } | ||
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| private ZXingScannerView mScannerView; | ||
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| @Override | ||
| public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { | ||
| Log.d(TAG, "onCreateView"); | ||
| mScannerView = new ZXingScannerView(getActivity()); | ||
| return mScannerView; | ||
| } | ||
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| @Override | ||
| public void onResume() { | ||
| super.onResume(); | ||
| Log.d(TAG, "onResume"); | ||
| mScannerView.setResultHandler(this); | ||
| mScannerView.startCamera(); | ||
| } | ||
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| static final String URI_PREFIX = "monero:"; | ||
| static final String PAYMENTID_STRING = "?tx_payment_id="; | ||
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| @Override | ||
| public void handleResult(Result rawResult) { | ||
| Log.d(TAG, rawResult.getBarcodeFormat().toString() + "/" + rawResult.getText()); | ||
| String text = rawResult.getText(); | ||
| if ((rawResult.getBarcodeFormat() == BarcodeFormat.QR_CODE) && | ||
| (text.startsWith(URI_PREFIX))) { | ||
| String address = null; | ||
| String paymentId = null; | ||
| String s = text.substring(URI_PREFIX.length()); | ||
| if (s.length() == 95) { | ||
| address = s; | ||
| } else { | ||
| int i = s.indexOf(PAYMENTID_STRING); | ||
| if ((i == 95) && (s.length() == (95 + PAYMENTID_STRING.length() + 16))) { | ||
| address = s.substring(0, 95); | ||
| paymentId = s.substring(95 + PAYMENTID_STRING.length()); | ||
| if (!activityCallback.isPaymentIdValid(paymentId)) { | ||
| address = null; | ||
| } | ||
| } | ||
| } | ||
| if (Helper.isAddressOk(address, WalletManager.getInstance().isTestNet())) { | ||
| activityCallback.onAddressScanned(address, paymentId); | ||
| return; | ||
| } else { | ||
| Toast.makeText(getActivity(), getString(R.string.send_qr_address_invalid), Toast.LENGTH_SHORT).show(); | ||
| } | ||
| } else { | ||
| Toast.makeText(getActivity(), getString(R.string.send_qr_invalid), Toast.LENGTH_SHORT).show(); | ||
| } | ||
|
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||
| // Note from dm77: | ||
| // * Wait 2 seconds to resume the preview. | ||
| // * On older devices continuously stopping and resuming camera preview can result in freezing the app. | ||
| // * I don't know why this is the case but I don't have the time to figure out. | ||
| Handler handler = new Handler(); | ||
| handler.postDelayed(new | ||
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| Runnable() { | ||
| @Override | ||
| public void run() { | ||
| mScannerView.resumeCameraPreview(ScannerFragment.this); | ||
| } | ||
| }, 2000); | ||
| } | ||
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| @Override | ||
| public void onPause() { | ||
| Log.d(TAG, "onPause"); | ||
| mScannerView.stopCamera(); | ||
| super.onPause(); | ||
| } | ||
|
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| @Override | ||
| public void onAttach(Context context) { | ||
| super.onAttach(context); | ||
| Log.d(TAG, "attaching scan"); | ||
| if (context instanceof Listener) { | ||
| this.activityCallback = (Listener) context; | ||
| } else { | ||
| throw new ClassCastException(context.toString() | ||
| + " must implement Listener"); | ||
| } | ||
| } | ||
| } |
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