package com.google.zxing.client.android.fragment;
import android.annotation.TargetApi;
import android.app.Fragment;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.InactivityTimer;
import com.google.zxing.client.android.R;
import com.google.zxing.client.android.VibrateManager;
import com.google.zxing.client.android.ViewfinderView;
import com.google.zxing.client.android.camera.CameraManager;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
/*
* 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.
*/
/**
* 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 dswitkin@google.com (Daniel Switkin)
* @author Sean Owen
*/
public class BarCodeScannerFragment extends Fragment implements SurfaceHolder.Callback {
private static final String TAG = BarCodeScannerFragment.class.getSimpleName();
private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
private CameraManager cameraManager;
private Result savedResultToShow;
private ViewfinderView viewfinderView;
private BarCodeScannerHandler handler;
// private TextView statusView;
// private View resultView;
private Result lastResult;
private boolean hasSurface;
private boolean copyToClipboard;
private Collection<BarcodeFormat> decodeFormats;
private Map<DecodeHintType, ?> decodeHints;
private String characterSet;
private InactivityTimer inactivityTimer;
private VibrateManager vibrateManager;
private IResultCallback mCallBack;
public interface IResultCallback {
void result(Result lastResult);
}
ViewfinderView getViewfinderView() {
return viewfinderView;
}
public Handler getHandler() {
return handler;
}
CameraManager getCameraManager() {
return cameraManager;
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
hasSurface = false;
inactivityTimer = new InactivityTimer(getActivity());
vibrateManager = new VibrateManager(getActivity());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstance) {
View view = inflater.inflate(R.layout.fragment_qr, container, false);
Window window = getActivity().getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
return view;
}
@Override
public void onResume() {
super.onResume();
startScan();
}
@Override
public void onPause() {
stopScan();
super.onPause();
}
public void startScan() {
if (cameraManager != null) {
Log.e(TAG, "startScan: scan already started.");
return;
}
cameraManager = new CameraManager(getActivity());
viewfinderView = (ViewfinderView) getView().findViewById(R.id.viewfinder_view);
viewfinderView.setCameraManager(cameraManager);
handler = null;
lastResult = null;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
//
// if (prefs.getBoolean(PreferencesActivity.KEY_DISABLE_AUTO_ORIENTATION, true)) {
// //noinspection ResourceType
// getActivity().setRequestedOrientation(getCurrentOrientation());
// } else {
// getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
// }
SurfaceView surfaceView = (SurfaceView) getView().findViewById(R.id.preview_view);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
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);
}
inactivityTimer.onResume();
decodeFormats = null;
characterSet = null;
}
public void stopScan() {
if (cameraManager == null) {
Log.e(TAG, "stopScan: scan already stopped");
return;
}
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
inactivityTimer.onPause();
cameraManager.closeDriver();
cameraManager = null;
if (!hasSurface) {
SurfaceView surfaceView = (SurfaceView) getView().findViewById(R.id.preview_view);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.removeCallback(this);
}
}
public void setmCallBack(IResultCallback mCallBack) {
this.mCallBack = mCallBack;
}
@TargetApi(Build.VERSION_CODES.FROYO)
private int getCurrentOrientation() {
int rotation = getActivity().getWindowManager().getDefaultDisplay().getRotation();
switch (rotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_90:
return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
default:
return ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
}
}
@Override
public void onDestroy() {
inactivityTimer.shutdown();
super.onDestroy();
}
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, IConstants.DECODE_SUCCEDED, 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(getActivity(), rawResult);
boolean fromLiveScan = barcode != null;
if (fromLiveScan) {
vibrateManager.vibrate();
drawResultPoints(barcode, scaleFactor, rawResult);
if (mCallBack != null) {
mCallBack.result(rawResult);
}
restartPreviewAfterDelay(500L);
}
}
/**
* 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(getResources().getColor(R.color.result_points));
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);
}
}
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 BarCodeScannerHandler(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(getString(R.string.app_name));
// builder.setMessage(getString(R.string.msg_camera_framework_bug));
// builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
// builder.setOnCancelListener(new FinishListener(this));
// builder.show();
// }
public void restartPreviewAfterDelay(long delayMS) {
if (handler != null) {
handler.sendEmptyMessageDelayed(IConstants.RESTART_PREVIEW, delayMS);
}
}
public void drawViewfinder() {
viewfinderView.drawViewfinder();
}
}