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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.google.zxing.client.android;
import android.content.ActivityNotFoundException;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.BitmapFactory;
import android.provider.Browser;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.client.android.camera.CameraManager;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import java.util.Collection;
import java.util.Map;
/**
* This class handles all the messaging which comprises the state machine for capture.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
public final class CaptureActivityHandler extends Handler {
private static final String TAG = CaptureActivityHandler.class.getSimpleName();
private final CaptureActivity activity;
private final DecodeThread decodeThread;
private State state;
private final CameraManager cameraManager;
private enum State {
PREVIEW,
SUCCESS,
DONE
}
CaptureActivityHandler(CaptureActivity activity,
Collection<BarcodeFormat> decodeFormats,
Map<DecodeHintType,?> baseHints,
String characterSet,
CameraManager cameraManager) {
this.activity = activity;
decodeThread = new DecodeThread(activity, decodeFormats, baseHints, characterSet,
new ViewfinderResultPointCallback(activity.getViewfinderView()));
decodeThread.start();
state = State.SUCCESS;
// Start ourselves capturing previews and decoding.
this.cameraManager = cameraManager;
cameraManager.startPreview();
restartPreviewAndDecode();
}
@Override
public void handleMessage(Message message) {
if (message.what == R.id.restart_preview) {
Log.d(TAG, "Got restart preview message");
restartPreviewAndDecode();
} else if (message.what == R.id.decode_succeeded) {
Log.d(TAG, "Got decode succeeded message");
state = State.SUCCESS;
Bundle bundle = message.getData();
Bitmap barcode = null;
float scaleFactor = 1.0f;
if (bundle != null) {
byte[] compressedBitmap = bundle.getByteArray(DecodeThread.BARCODE_BITMAP);
if (compressedBitmap != null) {
barcode = BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
// Mutable copy:
barcode = barcode.copy(Bitmap.Config.ARGB_8888, true);
}
scaleFactor = bundle.getFloat(DecodeThread.BARCODE_SCALED_FACTOR);
}
activity.handleDecode((Result) message.obj, barcode, scaleFactor);
} else if (message.what == R.id.decode_failed) {// We're decoding as fast as possible, so when one decode fails, start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
} else if (message.what == R.id.return_scan_result) {
Log.d(TAG, "Got return scan result message");
activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
activity.finish();
} else if (message.what == R.id.launch_product_query) {
Log.d(TAG, "Got product query message");
String url = (String) message.obj;
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
intent.setData(Uri.parse(url));
ResolveInfo resolveInfo =
activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
String browserPackageName = null;
if (resolveInfo.activityInfo != null) {
browserPackageName = resolveInfo.activityInfo.packageName;
Log.d(TAG, "Using browser in package " + browserPackageName);
}
// Needed for default Android browser / Chrome only apparently
if ("com.android.browser".equals(browserPackageName) || "com.android.chrome".equals(browserPackageName)) {
intent.setPackage(browserPackageName);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
}
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException ignored) {
Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
}
}
}
public void quitSynchronously() {
state = State.DONE;
cameraManager.stopPreview();
Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
quit.sendToTarget();
try {
// Wait at most half a second; should be enough time, and onPause() will timeout quickly
decodeThread.join(500L);
} catch (InterruptedException e) {
// continue
}
// Be absolutely sure we don't send any queued up messages
removeMessages(R.id.decode_succeeded);
removeMessages(R.id.decode_failed);
}
private void restartPreviewAndDecode() {
if (state == State.SUCCESS) {
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
activity.drawViewfinder();
}
}
}
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