// -*- mode: java; c-basic-offset: 2; -*-
/*
* 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 com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.camera.CameraManager;
import com.google.zxing.client.android.result.ResultButtonListener;
import com.google.zxing.client.android.result.ResultHandler;
import com.google.zxing.client.android.result.ResultHandlerFactory;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.text.ClipboardManager;
import android.util.Log;
import android.util.TypedValue;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
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 android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.DateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.EnumSet;
import java.util.Map;
import java.util.Set;
/**
* 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 final class AppInvCaptureActivity extends Activity implements SurfaceHolder.Callback {
private static final String TAG = AppInvCaptureActivity.class.getSimpleName();
private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
private static final String RETURN_URL_PARAM = "ret";
private static final String RAW_PARAM = "raw";
private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES =
EnumSet.of(ResultMetadataType.ISSUE_NUMBER,
ResultMetadataType.SUGGESTED_PRICE,
ResultMetadataType.ERROR_CORRECTION_LEVEL,
ResultMetadataType.POSSIBLE_COUNTRY);
private CameraManager cameraManager;
private CaptureActivityHandler handler;
private Result savedResultToShow;
private ViewfinderView viewfinderView;
private Result lastResult;
private boolean hasSurface;
private boolean copyToClipboard;
private IntentSource source;
private String sourceUrl;
private String returnUrlTemplate;
private boolean returnRaw;
private Collection<BarcodeFormat> decodeFormats;
private String characterSet;
private BeepManager beepManager;
private LinearLayout viewLayout;
private FrameLayout frameLayout;
private SurfaceView surfaceView;
ViewfinderView getViewfinderView() {
return viewfinderView;
}
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);
viewLayout = new LinearLayout(this);
viewLayout.setOrientation(LinearLayout.HORIZONTAL);
frameLayout = new FrameLayout(this);
frameLayout.addView(viewLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.FILL_PARENT));
frameLayout.setBackgroundColor(0xFFFFFFFF); // COLOR_WHITE XXX
setContentView(frameLayout);
frameLayout.requestLayout();
hasSurface = false;
}
@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());
viewfinderView = new ViewfinderView(this, null);
viewfinderView.setCameraManager(cameraManager);
frameLayout.addView(viewfinderView);
handler = null;
lastResult = null;
if (surfaceView == null) {
surfaceView = new SurfaceView(this);
viewLayout.addView(surfaceView);
}
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);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
surfaceView.setVisibility(View.VISIBLE);
Intent intent = getIntent();
copyToClipboard = true;
source = IntentSource.NONE;
decodeFormats = null;
characterSet = null;
if (intent != null) {
String action = intent.getAction();
String dataString = intent.getDataString();
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);
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);
}
}
}
characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
}
}
@Override
protected void onPause() {
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
cameraManager.closeDriver();
if (!hasSurface) {
surfaceView = new SurfaceView(this);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.removeCallback(this);
}
super.onPause();
}
@Override
protected void onDestroy() {
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 || source == IntentSource.ZXING_LINK) && 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, R.id.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 barcode A greyscale bitmap of the camera data which was decoded.
*/
public void handleDecode(Result rawResult, Bitmap barcode) {
lastResult = rawResult;
ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
boolean fromLiveScan = barcode != null;
if (fromLiveScan) {
drawResultPoints(barcode, rawResult);
}
switch (source) {
case NATIVE_APP_INTENT:
case PRODUCT_SEARCH_LINK:
handleDecodeExternally(rawResult, resultHandler, barcode);
break;
case NONE:
if (fromLiveScan) {
String message = " (bulk scan)";
Toast.makeText(this, message, 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);
} else {
}
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 rawResult The decoded results which contains the points to draw.
*/
private void drawResultPoints(Bitmap barcode, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(0xc099cc00);
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
drawLine(canvas, paint, points[0], points[1]);
} 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]);
drawLine(canvas, paint, points[2], points[3]);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
canvas.drawPoint(point.getX(), point.getY(), paint);
}
}
}
}
private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
}
// Put up our own UI for how to handle the decoded contents.
// private void handleDecodeInternally(Result rawResult, ResultHandler resultHandler, Bitmap barcode) {
// statusView.setVisibility(View.GONE);
// viewfinderView.setVisibility(View.GONE);
// resultView.setVisibility(View.VISIBLE);
// ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
// if (barcode == null) {
// barcodeImageView.setImageBitmap(BitmapFactory.decodeResource(getResources(),
// R.drawable.launcher_icon));
// } else {
// barcodeImageView.setImageBitmap(barcode);
// }
// TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
// formatTextView.setText(rawResult.getBarcodeFormat().toString());
// TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
// typeTextView.setText(resultHandler.getType().toString());
// DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
// String formattedTime = formatter.format(new Date(rawResult.getTimestamp()));
// TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
// timeTextView.setText(formattedTime);
// TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
// View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
// metaTextView.setVisibility(View.GONE);
// metaTextViewLabel.setVisibility(View.GONE);
// Map<ResultMetadataType,Object> metadata = rawResult.getResultMetadata();
// if (metadata != null) {
// StringBuilder metadataText = new StringBuilder(20);
// for (Map.Entry<ResultMetadataType,Object> entry : metadata.entrySet()) {
// if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
// metadataText.append(entry.getValue()).append('\n');
// }
// }
// if (metadataText.length() > 0) {
// metadataText.setLength(metadataText.length() - 1);
// metaTextView.setText(metadataText);
// metaTextView.setVisibility(View.VISIBLE);
// metaTextViewLabel.setVisibility(View.VISIBLE);
// }
// }
// TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
// CharSequence displayContents = resultHandler.getDisplayContents();
// contentsTextView.setText(displayContents);
// // Crudely scale betweeen 22 and 32 -- bigger font for shorter text
// int scaledSize = Math.max(22, 32 - displayContents.length() / 4);
// contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);
// int buttonCount = resultHandler.getButtonCount();
// ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
// buttonView.requestFocus();
// for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
// TextView button = (TextView) buttonView.getChildAt(x);
// if (x < buttonCount) {
// button.setVisibility(View.VISIBLE);
// button.setText(resultHandler.getButtonText(x));
// button.setOnClickListener(new ResultButtonListener(resultHandler, x));
// } else {
// button.setVisibility(View.GONE);
// }
// }
// if (copyToClipboard && !resultHandler.areContentsSecure()) {
// ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
// if (displayContents != null) {
// clipboard.setText(displayContents);
// }
// }
// }
// 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) {
viewfinderView.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 (copyToClipboard && !resultHandler.areContentsSecure()) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
CharSequence text = resultHandler.getDisplayContents();
if (text != null) {
clipboard.setText(text);
}
}
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<ResultMetadataType,?> 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());
}
Integer orientation = (Integer) 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);
}
Iterable<byte[]> byteSegments = (Iterable<byte[]>) 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(Constants.return_scan_result, intent, resultDurationMS);
}
}
private void sendReplyMessage(int id, Object arg, long delayMS) {
Message message = Message.obtain(handler, id, arg);
if (delayMS > 0L) {
handler.sendMessageDelayed(message, delayMS);
} else {
handler.sendMessage(message);
}
}
private void initCamera(SurfaceHolder surfaceHolder) {
Log.w(TAG, "initCamera() was called");
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, 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("Scanner");
builder.setMessage("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(Constants.restart_preview, delayMS);
}
}
public void drawViewfinder() {
viewfinderView.drawViewfinder();
}
}