/*
* Copyright (C) 2009 Muthu Ramadoss. All rights reserved.
*
* Modified from Zxing project to suit Books-Exchange requirements.
* Original source from Zxing - http://code.google.com/p/zxing/
*/
/*
* 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.androidrocks.bex.zxing.client.android;
import com.androidrocks.bex.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetFileDescriptor;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.net.Uri;
import android.os.Bundle;
import android.os.Message;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.text.ClipboardManager;
import android.text.SpannableStringBuilder;
import android.text.style.UnderlineSpan;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
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.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.androidrocks.bex.zxing.client.android.result.ResultButtonListener;
import com.androidrocks.bex.zxing.client.android.result.ResultHandler;
import com.androidrocks.bex.zxing.client.android.result.ResultHandlerFactory;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import java.io.IOException;
/**
* The barcode reader activity itself. This is loosely based on the CameraPreview
* example included in the Android SDK.
*/
public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
private static final String TAG = "CaptureActivity";
private static final int SHARE_ID = Menu.FIRST;
private static final int SETTINGS_ID = Menu.FIRST + 1;
private static final int HELP_ID = Menu.FIRST + 2;
private static final int ABOUT_ID = Menu.FIRST + 3;
private static final int MAX_RESULT_IMAGE_SIZE = 150;
private static final long INTENT_RESULT_DURATION = 1500L;
private static final float BEEP_VOLUME = 0.15f;
private static final long VIBRATE_DURATION = 200L;
private static final String PACKAGE_NAME = "com.androidrocks.bex.zxing.client.android";
private static final String PRODUCT_SEARCH_URL_PREFIX = "http://www.google";
private static final String PRODUCT_SEARCH_URL_SUFFIX = "/m/products/scan";
private static final String ZXING_URL = "http://zxing.appspot.com/scan";
private enum Source {
NATIVE_APP_INTENT,
PRODUCT_SEARCH_LINK,
ZXING_LINK,
NONE
}
public CaptureActivityHandler mHandler;
private ViewfinderView mViewfinderView;
private View mStatusView;
private View mResultView;
private MediaPlayer mMediaPlayer;
private Result mLastResult;
private boolean mHasSurface;
private boolean mPlayBeep;
private boolean mVibrate;
private boolean mCopyToClipboard;
private Source mSource;
private String mSourceUrl;
private String mDecodeMode;
private String mVersionName;
private final OnCompletionListener mBeepListener = new BeepListener();
@Override
public void onCreate(Bundle icicle) {
Log.i(TAG, "Creating CaptureActivity");
super.onCreate(icicle);
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.capture);
CameraManager.init(getApplication());
mViewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
mResultView = findViewById(R.id.result_view);
mStatusView = findViewById(R.id.status_view);
mHandler = null;
mLastResult = null;
mHasSurface = false;
showHelpOnFirstLaunch();
}
@Override
protected void onResume() {
super.onResume();
SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
if (mHasSurface) {
// 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);
}
Intent intent = getIntent();
String action = intent == null ? null : intent.getAction();
String dataString = intent == null ? null : intent.getDataString();
if (intent != null && action != null) {
if (action.equals(Intents.Scan.ACTION) || action.equals(Intents.Scan.DEPRECATED_ACTION)) {
// Scan the formats the intent requested, and return the result to the calling activity.
mSource = Source.NATIVE_APP_INTENT;
mDecodeMode = intent.getStringExtra(Intents.Scan.MODE);
resetStatusView();
} else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
// Scan only products and send the result to mobile Product Search.
mSource = Source.PRODUCT_SEARCH_LINK;
mSourceUrl = dataString;
mDecodeMode = Intents.Scan.PRODUCT_MODE;
resetStatusView();
} else if (dataString != null && dataString.equals(ZXING_URL)) {
// Scan all formats and handle the results ourselves.
// TODO: In the future we could allow the hyperlink to include a URL to send the results to.
mSource = Source.ZXING_LINK;
mSourceUrl = dataString;
mDecodeMode = null;
resetStatusView();
} else {
// Scan all formats and handle the results ourselves (launched from Home).
mSource = Source.NONE;
mDecodeMode = null;
resetStatusView();
}
} else {
mSource = Source.NONE;
mDecodeMode = null;
if (mLastResult == null) {
resetStatusView();
}
}
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
mPlayBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
mVibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
mCopyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
initBeepSound();
}
@Override
protected void onPause() {
super.onPause();
if (mHandler != null) {
mHandler.quitSynchronously();
mHandler = null;
}
CameraManager.get().closeDriver();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (mSource == Source.NATIVE_APP_INTENT) {
setResult(RESULT_CANCELED);
finish();
return true;
} else if ((mSource == Source.NONE || mSource == Source.ZXING_LINK) && mLastResult != null) {
resetStatusView();
mHandler.sendEmptyMessage(R.id.restart_preview);
return true;
}
} else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
// Handle these events so they don't launch the Camera app
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, SHARE_ID, 0, R.string.menu_share).setIcon(R.drawable.share_menu_item);
menu.add(0, SETTINGS_ID, 0, R.string.menu_settings)
.setIcon(android.R.drawable.ic_menu_preferences);
menu.add(0, HELP_ID, 0, R.string.menu_help)
.setIcon(android.R.drawable.ic_menu_help);
menu.add(0, ABOUT_ID, 0, R.string.menu_about)
.setIcon(android.R.drawable.ic_menu_info_details);
return true;
}
// Don't display the share menu item if the result overlay is showing.
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
menu.findItem(SHARE_ID).setVisible(mLastResult == null);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case SHARE_ID: {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClassName(this, ShareActivity.class.getName());
startActivity(intent);
break;
}
case SETTINGS_ID: {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClassName(this, PreferencesActivity.class.getName());
startActivity(intent);
break;
}
case HELP_ID: {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClassName(this, HelpActivity.class.getName());
startActivity(intent);
break;
}
case ABOUT_ID:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(getString(R.string.title_about) + mVersionName);
builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
builder.setIcon(R.drawable.zxing_icon);
builder.setPositiveButton(R.string.button_open_browser, mAboutListener);
builder.setNegativeButton(R.string.button_cancel, null);
builder.show();
break;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConfigurationChanged(Configuration config) {
// Do nothing, this is to prevent the activity from being restarted when the keyboard opens.
super.onConfigurationChanged(config);
}
private final DialogInterface.OnClickListener mAboutListener = new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
startActivity(intent);
}
};
public void surfaceCreated(SurfaceHolder holder) {
if (!mHasSurface) {
mHasSurface = true;
initCamera(holder);
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
mHasSurface = false;
}
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) {
mLastResult = rawResult;
playBeepSoundAndVibrate();
drawResultPoints(barcode, rawResult);
switch (mSource) {
case NATIVE_APP_INTENT:
case PRODUCT_SEARCH_LINK:
handleDecodeExternally(rawResult, barcode);
break;
case ZXING_LINK:
case NONE:
handleDecodeInternally(rawResult, barcode);
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(getResources().getColor(R.color.result_image_border));
paint.setStrokeWidth(3.0f);
paint.setStyle(Paint.Style.STROKE);
Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
canvas.drawRect(border, paint);
paint.setColor(getResources().getColor(R.color.result_points));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
canvas.drawLine(points[0].getX(), points[0].getY(), points[1].getX(),
points[1].getY(), paint);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
canvas.drawPoint(point.getX(), point.getY(), paint);
}
}
}
}
// Put up our own UI for how to handle the decoded contents.
private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
mStatusView.setVisibility(View.GONE);
mViewfinderView.setVisibility(View.GONE);
mResultView.setVisibility(View.VISIBLE);
ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
barcodeImageView.setMaxWidth(MAX_RESULT_IMAGE_SIZE);
barcodeImageView.setMaxHeight(MAX_RESULT_IMAGE_SIZE);
barcodeImageView.setImageBitmap(barcode);
TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
formatTextView.setText(getString(R.string.msg_default_format) + ": " +
rawResult.getBarcodeFormat().toString());
ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
typeTextView.setText(getString(R.string.msg_default_type) + ": " +
resultHandler.getType().toString());
TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
CharSequence title = getString(resultHandler.getDisplayTitle());
SpannableStringBuilder styled = new SpannableStringBuilder(title + "\n\n");
styled.setSpan(new UnderlineSpan(), 0, title.length(), 0);
CharSequence displayContents = resultHandler.getDisplayContents();
styled.append(displayContents);
contentsTextView.setText(styled);
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++) {
Button button = (Button) 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 (mCopyToClipboard) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
clipboard.setText(displayContents);
}
}
// Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
private void handleDecodeExternally(Result rawResult, Bitmap barcode) {
mViewfinderView.drawResultBitmap(barcode);
// Since this message will only be shown for a second, just tell the user what kind of
// barcode was found (e.g. contact info) rather than the full contents, which they won't
// have time to read.
ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
TextView textView = (TextView) findViewById(R.id.status_text_view);
textView.setGravity(Gravity.CENTER);
textView.setTextSize(18.0f);
textView.setText(getString(resultHandler.getDisplayTitle()));
mStatusView.setBackgroundColor(getResources().getColor(R.color.transparent));
if (mCopyToClipboard) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
clipboard.setText(resultHandler.getDisplayContents());
}
if (mSource == Source.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.putExtra(Intents.Scan.RESULT, rawResult.toString());
intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
Message message = Message.obtain(mHandler, R.id.return_scan_result);
message.obj = intent;
mHandler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
} else if (mSource == Source.PRODUCT_SEARCH_LINK) {
// Reformulate the URL which triggered us into a query, so that the request goes to the same
// TLD as the scan URL.
Message message = Message.obtain(mHandler, R.id.launch_product_query);
int end = mSourceUrl.lastIndexOf("/scan");
message.obj = mSourceUrl.substring(0, end) + "?q=" +
resultHandler.getDisplayContents().toString() + "&source=zxing";
mHandler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
}
}
/**
* We want the help screen to be shown automatically the first time a new version of the app is
* run. The easiest way to do this is to check android:versionCode from the manifest, and compare
* it to a value stored as a preference.
*/
private void showHelpOnFirstLaunch() {
try {
PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
int currentVersion = info.versionCode;
// Since we're paying to talk to the PackageManager anyway, it makes sense to cache the app
// version name here for display in the about box later.
this.mVersionName = info.versionName;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
if (currentVersion > lastVersion) {
prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClassName(this, HelpActivity.class.getName());
startActivity(intent);
}
} catch (PackageManager.NameNotFoundException e) {
Log.w(TAG, e);
}
}
/**
* Creates the beep MediaPlayer in advance so that the sound can be triggered with the least
* latency possible.
*/
private void initBeepSound() {
if (mPlayBeep && mMediaPlayer == null) {
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_SYSTEM);
mMediaPlayer.setOnCompletionListener(mBeepListener);
AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
try {
mMediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
file.getLength());
file.close();
mMediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
mMediaPlayer.prepare();
} catch (IOException e) {
mMediaPlayer = null;
}
}
}
private void playBeepSoundAndVibrate() {
if (mPlayBeep && mMediaPlayer != null) {
mMediaPlayer.start();
}
if (mVibrate) {
Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
vibrator.vibrate(VIBRATE_DURATION);
}
}
private void initCamera(SurfaceHolder surfaceHolder) {
try {
CameraManager.get().openDriver(surfaceHolder);
} catch (IOException ioe) {
Log.w(TAG, ioe);
return;
}
if (mHandler == null) {
boolean beginScanning = mLastResult == null;
mHandler = new CaptureActivityHandler(this, mDecodeMode, beginScanning);
}
}
private void resetStatusView() {
mResultView.setVisibility(View.GONE);
mStatusView.setVisibility(View.VISIBLE);
mStatusView.setBackgroundColor(getResources().getColor(R.color.status_view));
mViewfinderView.setVisibility(View.VISIBLE);
TextView textView = (TextView) findViewById(R.id.status_text_view);
textView.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
textView.setTextSize(14.0f);
textView.setText(R.string.msg_default_status);
mLastResult = null;
}
public void drawViewfinder() {
mViewfinderView.drawViewfinder();
}
/**
* When the beep has finished playing, rewind to queue up another one.
*/
private static class BeepListener implements OnCompletionListener {
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.seekTo(0);
}
}
}