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Replace barcodescanner with CameraX and ZXing
This removes the dependency on ``me.dm7.barcodescanner:zxing`` and replaces it with our own QR code scanner implementation using CameraX and ZXing. The main reason for this change is to hopefully get better compatibility with obscure devices. The barcodescanner library we were previously using seems unmaintained, while Google is apparently putting a lot of effort into CameraX. ScannerActivity has been almost entirely rewritten, but the functionality is exactly the same as before.
This commit is contained in:
Alexander Bakker
parent
626995ec91
commit
c65ed16790
5 changed files with 183 additions and 141 deletions
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@ -1,68 +1,79 @@
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package com.beemdevelopment.aegis.ui;
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import android.content.Context;
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import android.content.Intent;
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import android.hardware.Camera;
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import android.net.Uri;
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import android.os.Bundle;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.widget.Toast;
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import androidx.annotation.NonNull;
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import androidx.camera.core.CameraInfoUnavailableException;
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import androidx.camera.core.CameraSelector;
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import androidx.camera.core.ImageAnalysis;
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import androidx.camera.core.Preview;
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import androidx.camera.lifecycle.ProcessCameraProvider;
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import androidx.camera.view.PreviewView;
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import androidx.core.content.ContextCompat;
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import com.beemdevelopment.aegis.R;
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import com.beemdevelopment.aegis.Theme;
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import com.beemdevelopment.aegis.helpers.SquareFinderView;
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import com.beemdevelopment.aegis.helpers.QrCodeAnalyzer;
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import com.beemdevelopment.aegis.otp.GoogleAuthInfo;
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import com.beemdevelopment.aegis.otp.GoogleAuthInfoException;
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import com.beemdevelopment.aegis.vault.VaultEntry;
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import com.google.zxing.BarcodeFormat;
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import com.google.common.util.concurrent.ListenableFuture;
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import com.google.zxing.Result;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.concurrent.ExecutionException;
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import me.dm7.barcodescanner.core.IViewFinder;
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import me.dm7.barcodescanner.zxing.ZXingScannerView;
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public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Listener {
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private ProcessCameraProvider _cameraProvider;
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private ListenableFuture<ProcessCameraProvider> _cameraProviderFuture;
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import static android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK;
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import static android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT;
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private List<Integer> _lenses;
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private int _currentLens;
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public class ScannerActivity extends AegisActivity implements ZXingScannerView.ResultHandler {
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private ZXingScannerView _scannerView;
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private Menu _menu;
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private int _facing = CAMERA_FACING_BACK;
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private PreviewView _previewView;
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private int _batchId = 0;
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private int _batchIndex = -1;
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private List<VaultEntry> _entries;
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@Override
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protected void onCreate(Bundle state) {
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super.onCreate(state);
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_scanner);
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_entries = new ArrayList<>();
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_scannerView = new ZXingScannerView(this) {
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@Override
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protected IViewFinder createViewFinderView(Context context) {
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return new SquareFinderView(context);
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}
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};
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_scannerView.setResultHandler(this);
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_scannerView.setFormats(Collections.singletonList(BarcodeFormat.QR_CODE));
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_lenses = new ArrayList<>();
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_previewView = findViewById(R.id.preview_view);
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int camera = getRearCameraId();
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if (camera == -1) {
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camera = getFrontCameraId();
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if (camera == -1) {
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_cameraProviderFuture = ProcessCameraProvider.getInstance(this);
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_cameraProviderFuture.addListener(() -> {
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try {
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_cameraProvider = _cameraProviderFuture.get();
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} catch (ExecutionException | InterruptedException e) {
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// if we're to believe the Android documentation, this should never happen
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// https://developer.android.com/training/camerax/preview#check-provider
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throw new RuntimeException(e);
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}
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addCamera(CameraSelector.LENS_FACING_BACK);
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addCamera(CameraSelector.LENS_FACING_FRONT);
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if (_lenses.size() == 0) {
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Toast.makeText(this, getString(R.string.no_cameras_available), Toast.LENGTH_LONG).show();
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finish();
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return;
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}
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_facing = CAMERA_FACING_FRONT;
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}
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_scannerView.startCamera(camera);
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_currentLens = _lenses.get(0);
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updateCameraIcon();
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setContentView(_scannerView);
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bindPreview(_cameraProvider);
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}, ContextCompat.getMainExecutor(this));
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}
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@Override
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@ -74,60 +85,80 @@ public class ScannerActivity extends AegisActivity implements ZXingScannerView.R
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public boolean onCreateOptionsMenu(Menu menu) {
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_menu = menu;
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getMenuInflater().inflate(R.menu.menu_scanner, menu);
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updateCameraIcon();
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return true;
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch (item.getItemId()) {
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case R.id.action_camera:
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_scannerView.stopCamera();
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switch (_facing) {
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case CAMERA_FACING_BACK:
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_facing = CAMERA_FACING_FRONT;
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break;
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case CAMERA_FACING_FRONT:
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_facing = CAMERA_FACING_BACK;
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break;
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}
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updateCameraIcon();
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_scannerView.startCamera(getCameraId(_facing));
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return true;
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case R.id.action_lock:
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default:
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return super.onOptionsItemSelected(item);
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if (item.getItemId() == R.id.action_camera) {
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_cameraProvider.unbindAll();
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_currentLens = _currentLens == CameraSelector.LENS_FACING_BACK ? CameraSelector.LENS_FACING_FRONT : CameraSelector.LENS_FACING_BACK;
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bindPreview(_cameraProvider);
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updateCameraIcon();
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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private void addCamera(int lens) {
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try {
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CameraSelector camera = new CameraSelector.Builder().requireLensFacing(lens).build();
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if (_cameraProvider.hasCamera(camera)) {
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_lenses.add(lens);
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}
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} catch (CameraInfoUnavailableException e) {
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e.printStackTrace();
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}
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}
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@Override
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public void onResume() {
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super.onResume();
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_scannerView.startCamera(getCameraId(_facing));
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private void updateCameraIcon() {
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if (_menu != null) {
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MenuItem item = _menu.findItem(R.id.action_camera);
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boolean dual = _lenses.size() > 1;
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if (dual) {
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switch (_currentLens) {
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case CameraSelector.LENS_FACING_BACK:
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item.setIcon(R.drawable.ic_camera_front_24dp);
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break;
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case CameraSelector.LENS_FACING_FRONT:
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item.setIcon(R.drawable.ic_camera_rear_24dp);
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break;
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}
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}
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item.setVisible(dual);
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}
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}
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private void bindPreview(@NonNull ProcessCameraProvider cameraProvider) {
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Preview preview = new Preview.Builder().build();
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preview.setSurfaceProvider(_previewView.createSurfaceProvider());
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CameraSelector selector = new CameraSelector.Builder()
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.requireLensFacing(_currentLens)
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.build();
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ImageAnalysis analysis = new ImageAnalysis.Builder()
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.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
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.build();
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analysis.setAnalyzer(ContextCompat.getMainExecutor(this), new QrCodeAnalyzer(this));
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cameraProvider.bindToLifecycle(this, selector, preview, analysis);
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}
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@Override
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public void onPause() {
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super.onPause();
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_scannerView.stopCamera();
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}
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@Override
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public void handleResult(Result rawResult) {
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public void onQrCodeDetected(Result result) {
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try {
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Uri uri = Uri.parse(rawResult.getText().trim());
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Uri uri = Uri.parse(result.getText().trim());
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if (uri.getScheme() != null && uri.getScheme().equals(GoogleAuthInfo.SCHEME_EXPORT)) {
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handleExportUri(uri);
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} else {
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handleUri(uri);
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}
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_scannerView.resumeCameraPreview(this);
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} catch (GoogleAuthInfoException e) {
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e.printStackTrace();
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Dialogs.showErrorDialog(this, R.string.read_qr_error, e, (dialog, which) -> {
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_scannerView.resumeCameraPreview(this);
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});
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Dialogs.showErrorDialog(this, R.string.read_qr_error, e, ((dialog, which) -> bindPreview(_cameraProvider)));
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_cameraProvider.unbindAll();
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}
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}
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@ -171,42 +202,4 @@ public class ScannerActivity extends AegisActivity implements ZXingScannerView.R
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setResult(RESULT_OK, intent);
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finish();
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}
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private void updateCameraIcon() {
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if (_menu != null) {
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MenuItem item = _menu.findItem(R.id.action_camera);
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boolean dual = getFrontCameraId() != -1 && getRearCameraId() != -1;
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if (dual) {
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switch (_facing) {
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case CAMERA_FACING_BACK:
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item.setIcon(R.drawable.ic_camera_front_24dp);
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break;
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case CAMERA_FACING_FRONT:
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item.setIcon(R.drawable.ic_camera_rear_24dp);
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break;
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}
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}
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item.setVisible(dual);
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}
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}
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private static int getCameraId(int facing) {
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Camera.CameraInfo info = new Camera.CameraInfo();
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for (int i = 0; i < Camera.getNumberOfCameras(); ++i) {
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Camera.getCameraInfo(i, info);
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if (info.facing == facing) {
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return i;
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}
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}
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return -1;
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}
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private static int getRearCameraId() {
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return getCameraId(CAMERA_FACING_BACK);
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}
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private static int getFrontCameraId() {
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return getCameraId(CAMERA_FACING_FRONT);
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}
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}
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