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/*
* Copyright (C) 2008 ZXing authors
*
* 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.
*/
package com.gluonhq.charm.down.android.scan.zxing;
import android.graphics.Color;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;
import com.gluonhq.charm.down.android.scan.zxing.camera.CameraManager;
import com.gluonhq.charm.down.android.scan.zxing.res.layout.CaptureActivityView;
import com.gluonhq.charm.down.android.scan.zxing.result.ResultHandler;
import com.gluonhq.charm.down.android.scan.zxing.result.ResultHandlerFactory;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
/**
* This activity opens the camera and does the actual scanning on a background thread. It draws a
* viewfinder to help the user place the barcode correctly, shows feedback as the image processing
* is happening, and then overlays the results when a scan is successful.
*
* @author [email protected] (Daniel Switkin)
* @author Sean Owen
*/
public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
private static final String TAG = CaptureActivity.class.getSimpleName();
private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
private CameraManager cameraManager;
private CaptureActivityHandler handler;
private Result savedResultToShow;
private CaptureActivityView captureActivityView;
private Result lastResult;
private boolean hasSurface;
private IntentSource source;
private Collection decodeFormats;
private Map decodeHints;
private String characterSet;
private InactivityTimer inactivityTimer;
private AmbientLightManager ambientLightManager;
ViewfinderView getViewfinderView() {
return captureActivityView.getViewfinderView();
}
public Handler getHandler() {
return handler;
}
CameraManager getCameraManager() {
return cameraManager;
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
window.requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
window.requestFeature(Window.FEATURE_ACTION_MODE_OVERLAY);
captureActivityView = new CaptureActivityView(this);
setContentView(captureActivityView);
hasSurface = false;
inactivityTimer = new InactivityTimer(this);
ambientLightManager = new AmbientLightManager(this);
SharedPreferences defaultSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor defaultSharedPreferencesEditor = defaultSharedPreferences.edit();
// preferences scanning
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_1D_PRODUCT, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_1D_INDUSTRIAL, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_QR, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_DATA_MATRIX, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_AZTEC, false);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DECODE_PDF417, false);
// preferences general
defaultSharedPreferencesEditor.putString(PreferencesActivity.KEY_FRONT_LIGHT_MODE, "OFF");
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_AUTO_FOCUS, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_INVERT_SCAN, false);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DISABLE_AUTO_ORIENTATION, true);
// preferences device bug workarounds
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DISABLE_CONTINUOUS_FOCUS, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DISABLE_METERING, true);
defaultSharedPreferencesEditor.putBoolean(PreferencesActivity.KEY_DISABLE_BARCODE_SCENE_MODE, true);
defaultSharedPreferencesEditor.commit();
}
@Override
protected void onResume() {
super.onResume();
// CameraManager must be initialized here, not in onCreate(). This is necessary because we don't
// want to open the camera driver and measure the screen size if we're going to show the help on
// first launch. That led to bugs where the scanning rectangle was the wrong size and partially
// off screen.
cameraManager = new CameraManager(getApplication());
captureActivityView.getViewfinderView().setCameraManager(cameraManager);
handler = null;
lastResult = null;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
if (prefs.getBoolean(PreferencesActivity.KEY_DISABLE_AUTO_ORIENTATION, true)) {
setRequestedOrientation(getCurrentOrientation());
} else {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
}
resetStatusView();
ambientLightManager.start(cameraManager);
inactivityTimer.onResume();
Intent intent = getIntent();
source = IntentSource.NONE;
decodeFormats = null;
characterSet = null;
if (intent != null) {
String action = intent.getAction();
if (Intents.Scan.ACTION.equals(action)) {
// Scan the formats the intent requested, and return the result to the calling activity.
source = IntentSource.NATIVE_APP_INTENT;
decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);
decodeHints = DecodeHintManager.parseDecodeHints(intent);
if (intent.hasExtra(Intents.Scan.WIDTH) && intent.hasExtra(Intents.Scan.HEIGHT)) {
int width = intent.getIntExtra(Intents.Scan.WIDTH, 0);
int height = intent.getIntExtra(Intents.Scan.HEIGHT, 0);
if (width > 0 && height > 0) {
cameraManager.setManualFramingRect(width, height);
}
}
if (intent.hasExtra(Intents.Scan.CAMERA_ID)) {
int cameraId = intent.getIntExtra(Intents.Scan.CAMERA_ID, -1);
if (cameraId >= 0) {
cameraManager.setManualCameraId(cameraId);
}
}
String customPromptMessage = intent.getStringExtra(Intents.Scan.PROMPT_MESSAGE);
if (customPromptMessage != null) {
captureActivityView.getStatusView().setText(customPromptMessage);
}
}
characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
}
SurfaceView surfaceView = captureActivityView.getPreviewView();
SurfaceHolder surfaceHolder = surfaceView.getHolder();
if (hasSurface) {
// The activity was paused but not stopped, so the surface still exists. Therefore
// surfaceCreated() won't be called, so init the camera here.
initCamera(surfaceHolder);
} else {
// Install the callback and wait for surfaceCreated() to init the camera.
surfaceHolder.addCallback(this);
}
}
private int getCurrentOrientation() {
int rotation = getWindowManager().getDefaultDisplay().getRotation();
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
switch (rotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_90:
return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
default:
return ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
}
} else {
switch (rotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_270:
return ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
default:
return ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
}
}
}
@Override
protected void onPause() {
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
inactivityTimer.onPause();
ambientLightManager.stop();
cameraManager.closeDriver();
//historyManager = null; // Keep for onActivityResult
if (!hasSurface) {
SurfaceView surfaceView = captureActivityView.getPreviewView();
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.removeCallback(this);
}
super.onPause();
}
@Override
protected void onDestroy() {
inactivityTimer.shutdown();
super.onDestroy();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (source == IntentSource.NATIVE_APP_INTENT) {
setResult(RESULT_CANCELED);
finish();
return true;
}
if (source == IntentSource.NONE && lastResult != null) {
restartPreviewAfterDelay(0L);
return true;
}
break;
case KeyEvent.KEYCODE_FOCUS:
case KeyEvent.KEYCODE_CAMERA:
// Handle these events so they don't launch the Camera app
return true;
// Use volume up/down to turn on light
case KeyEvent.KEYCODE_VOLUME_DOWN:
cameraManager.setTorch(false);
return true;
case KeyEvent.KEYCODE_VOLUME_UP:
cameraManager.setTorch(true);
return true;
}
return super.onKeyDown(keyCode, event);
}
private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
// Bitmap isn't used yet -- will be used soon
if (handler == null) {
savedResultToShow = result;
} else {
if (result != null) {
savedResultToShow = result;
}
if (savedResultToShow != null) {
Message message = Message.obtain(handler, Actions.decode_succeeded, savedResultToShow);
handler.sendMessage(message);
}
savedResultToShow = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (holder == null) {
Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
}
if (!hasSurface) {
hasSurface = true;
initCamera(holder);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
hasSurface = false;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
/**
* A valid barcode has been found, so give an indication of success and show the results.
*
* @param rawResult The contents of the barcode.
* @param scaleFactor amount by which thumbnail was scaled
* @param barcode A greyscale bitmap of the camera data which was decoded.
*/
public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {
inactivityTimer.onActivity();
lastResult = rawResult;
ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
boolean fromLiveScan = barcode != null;
if (fromLiveScan) {
// Then not from history, so beep/vibrate and we have an image to draw on
drawResultPoints(barcode, scaleFactor, rawResult);
}
switch (source) {
case NATIVE_APP_INTENT:
handleDecodeExternally(rawResult, resultHandler, barcode);
break;
case NONE:
Toast.makeText(getApplicationContext(),
"Bulk mode: barcode scanned and saved (" + rawResult.getText() + ')',
Toast.LENGTH_SHORT).show();
// Wait a moment or else it will scan the same barcode continuously about 3 times
restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
break;
}
}
/**
* Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
*
* @param barcode A bitmap of the captured image.
* @param scaleFactor amount by which thumbnail was scaled
* @param rawResult The decoded results which contains the points to draw.
*/
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(Color.argb(0xc0, 0x99, 0xcc, 0x00));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
drawLine(canvas, paint, points[0], points[1], scaleFactor);
} else if (points.length == 4 &&
(rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A ||
rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and metadata
drawLine(canvas, paint, points[0], points[1], scaleFactor);
drawLine(canvas, paint, points[2], points[3], scaleFactor);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
if (point != null) {
canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
}
}
}
}
}
private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b, float scaleFactor) {
if (a != null && b != null) {
canvas.drawLine(scaleFactor * a.getX(),
scaleFactor * a.getY(),
scaleFactor * b.getX(),
scaleFactor * b.getY(),
paint);
}
}
// Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
private void handleDecodeExternally(Result rawResult, ResultHandler resultHandler, Bitmap barcode) {
if (barcode != null) {
captureActivityView.getViewfinderView().drawResultBitmap(barcode);
}
long resultDurationMS;
if (getIntent() == null) {
resultDurationMS = DEFAULT_INTENT_RESULT_DURATION_MS;
} else {
resultDurationMS = getIntent().getLongExtra(Intents.Scan.RESULT_DISPLAY_DURATION_MS,
DEFAULT_INTENT_RESULT_DURATION_MS);
}
if (resultDurationMS > 0) {
String rawResultString = String.valueOf(rawResult);
if (rawResultString.length() > 32) {
rawResultString = rawResultString.substring(0, 32) + " ...";
}
captureActivityView.getStatusView().setText(resultHandler.getDisplayTitle() + " : " + rawResultString);
}
if (source == IntentSource.NATIVE_APP_INTENT) {
// Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION when
// the deprecated intent is retired.
Intent intent = new Intent(getIntent().getAction());
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
byte[] rawBytes = rawResult.getRawBytes();
if (rawBytes != null && rawBytes.length > 0) {
intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes);
}
Map metadata = rawResult.getResultMetadata();
if (metadata != null) {
if (metadata.containsKey(ResultMetadataType.UPC_EAN_EXTENSION)) {
intent.putExtra(Intents.Scan.RESULT_UPC_EAN_EXTENSION,
metadata.get(ResultMetadataType.UPC_EAN_EXTENSION).toString());
}
Number orientation = (Number) metadata.get(ResultMetadataType.ORIENTATION);
if (orientation != null) {
intent.putExtra(Intents.Scan.RESULT_ORIENTATION, orientation.intValue());
}
String ecLevel = (String) metadata.get(ResultMetadataType.ERROR_CORRECTION_LEVEL);
if (ecLevel != null) {
intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL, ecLevel);
}
@SuppressWarnings("unchecked")
Iterable byteSegments = (Iterable) metadata.get(ResultMetadataType.BYTE_SEGMENTS);
if (byteSegments != null) {
int i = 0;
for (byte[] byteSegment : byteSegments) {
intent.putExtra(Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i, byteSegment);
i++;
}
}
}
sendReplyMessage(Actions.return_scan_result, intent, resultDurationMS);
}
}
private void sendReplyMessage(int id, Object arg, long delayMS) {
if (handler != null) {
Message message = Message.obtain(handler, id, arg);
if (delayMS > 0L) {
handler.sendMessageDelayed(message, delayMS);
} else {
handler.sendMessage(message);
}
}
}
private void initCamera(SurfaceHolder surfaceHolder) {
if (surfaceHolder == null) {
throw new IllegalStateException("No SurfaceHolder provided");
}
if (cameraManager.isOpen()) {
Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
return;
}
try {
cameraManager.openDriver(surfaceHolder);
// Creating the handler starts the preview, which can also throw a RuntimeException.
if (handler == null) {
handler = new CaptureActivityHandler(this, decodeFormats, decodeHints, characterSet, cameraManager);
}
decodeOrStoreSavedBitmap(null, null);
} catch (IOException ioe) {
Log.w(TAG, ioe);
displayFrameworkBugMessageAndExit();
} catch (RuntimeException e) {
// Barcode Scanner has seen crashes in the wild of this variety:
// java.?lang.?RuntimeException: Fail to connect to camera service
Log.w(TAG, "Unexpected error initializing camera", e);
displayFrameworkBugMessageAndExit();
}
}
private void displayFrameworkBugMessageAndExit() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Barcode Scanner");
builder.setMessage("Sorry, the Android camera encountered a problem. You may need to restart the device.");
builder.setPositiveButton("OK", new FinishListener(this));
builder.setOnCancelListener(new FinishListener(this));
builder.show();
}
public void restartPreviewAfterDelay(long delayMS) {
if (handler != null) {
handler.sendEmptyMessageDelayed(Actions.restart_preview, delayMS);
}
resetStatusView();
}
private void resetStatusView() {
captureActivityView.getStatusView().setText("Place a barcode inside the viewfinder rectangle to scan it.");
captureActivityView.getStatusView().setVisibility(View.VISIBLE);
captureActivityView.getViewfinderView().setVisibility(View.VISIBLE);
lastResult = null;
}
public void drawViewfinder() {
captureActivityView.getViewfinderView().drawViewfinder();
}
}
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