/*
* Copyright 2009 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.codename1.impl.android;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import com.codename1.ui.Dialog;
/**
* <p>A utility class which helps ease integration with Barcode Scanner via {@link Intent}s.
* This is a simple way to invoke barcode scanning and receive the result,
* without any need to integrate, modify, or learn the project's source
* code.</p>
*
* <h2>Initiating a barcode scan</h2>
*
* <p>To integrate, create an instance of {@code IntentIntegrator} and call {@link #initiateScan()}
* and wait for the result in your app.</p>
*
* <p>It does require that the Barcode Scanner (or work-alike) application is
* installed. The
* {@link #initiateScan()} method will prompt the user to download the
* application, if needed.</p>
*
* <p>There are a few steps to using this integration. First, your {@link Activity}
* must implement the method {@link Activity#onActivityResult(int, int, Intent)}
* and include a line of code like this:</p>
*
* <pre>{@code
* public void onActivityResult(int requestCode, int resultCode, Intent intent) {
* IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
* if (scanResult != null) {
* // handle scan result
* }
* // else continue with any other code you need in the method ... } }</pre>
*
* <p>This is where you will handle a scan result.</p>
*
* <p>Second, just call this in response to a user action somewhere to begin the
* scan process:</p>
*
* <pre>{@code
* IntentIntegrator integrator = new IntentIntegrator(yourActivity);
* integrator.initiateScan();
* }</pre>
*
* <p>Note that {@link #initiateScan()} returns an {@link AlertDialog} which is
* non-null if the user was prompted to download the application. This lets the
* calling app potentially manage the dialog. In particular, ideally, the app
* dismisses the dialog if it's still active in its {@link Activity#onPause()}
* method.</p>
*
* <p>You can use {@link #setTitle(String)} to customize the title of this
* download prompt dialog (or, use
* {@link #setTitleByID(int)} to set the title by string resource ID.) Likewise,
* the prompt message, and yes/no button labels can be changed.</p>
*
* <p>Finally, you can use {@link #addExtra(String, Object)} to add more
* parameters to the Intent used to invoke the scanner. This can be used to set
* additional options not directly exposed by this simplified API.</p>
*
* <p>By default, this will only allow applications that are known to respond to
* this intent correctly do so. The apps that are allowed to response can be set
* with {@link #setTargetApplications(Collection)}. For example, set to {@link #TARGET_BARCODE_SCANNER_ONLY}
* to only target the Barcode Scanner app itself.</p>
*
* <h2>Sharing text via barcode</h2>
*
* <p>To share text, encoded as a QR Code on-screen, similarly, see {@link #shareText(CharSequence)}.</p>
*
* <p>Some code, particularly download integration, was contributed from the
* Anobiit application.</p>
*
* <h2>Enabling experimental barcode formats</h2>
*
* <p>Some formats are not enabled by default even when scanning with {@link #ALL_CODE_TYPES},
* such as
* {@link com.google.zxing.BarcodeFormat#PDF_417}. Use {@link #initiateScan(java.util.Collection)}
* with a collection containing the names of formats to scan for explicitly,
* like "PDF_417", to use such formats.</p>
*
* @author Sean Owen
* @author Fred Lin
* @author Isaac Potoczny-Jones
* @author Brad Drehmer
* @author gcstang
*/
public class IntentIntegrator {
public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
private static final String TAG = IntentIntegrator.class.getSimpleName();
public static final String DEFAULT_TITLE = "Install Barcode Scanner?";
public static final String DEFAULT_MESSAGE =
"This application requires Barcode Scanner. Would you like to install it?";
public static final String DEFAULT_YES = "Yes";
public static final String DEFAULT_NO = "No";
private static final String BS_PACKAGE = "com.google.zxing.client.android";
private static final String BSPLUS_PACKAGE = "com.srowen.bs.android";
// supported barcode formats
public static final Collection<String> PRODUCT_CODE_TYPES = list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "RSS_14");
public static final Collection<String> ONE_D_CODE_TYPES =
list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "CODE_39", "CODE_93", "CODE_128",
"ITF", "RSS_14", "RSS_EXPANDED");
public static final Collection<String> QR_CODE_TYPES = Collections.singleton("QR_CODE");
public static final Collection<String> DATA_MATRIX_TYPES = Collections.singleton("DATA_MATRIX");
public static final Collection<String> ALL_CODE_TYPES = null;
public static final Collection<String> TARGET_BARCODE_SCANNER_ONLY = Collections.singleton(BS_PACKAGE);
public static final Collection<String> TARGET_ALL_KNOWN = list(
BS_PACKAGE, // Barcode Scanner
BSPLUS_PACKAGE, // Barcode Scanner+
BSPLUS_PACKAGE + ".simple", // Barcode Scanner+ Simple
"la.droid.qr",
"la.droid.qr.priva"
);
private final Activity activity;
private String title;
private String message;
private String buttonYes;
private String buttonNo;
private Collection<String> targetApplications;
private final Map<String, Object> moreExtras;
public IntentIntegrator(Activity activity) {
this.activity = activity;
title = DEFAULT_TITLE;
message = DEFAULT_MESSAGE;
buttonYes = DEFAULT_YES;
buttonNo = DEFAULT_NO;
targetApplications = TARGET_ALL_KNOWN;
moreExtras = new HashMap<String, Object>(3);
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public void setTitleByID(int titleID) {
title = activity.getString(titleID);
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public void setMessageByID(int messageID) {
message = activity.getString(messageID);
}
public String getButtonYes() {
return buttonYes;
}
public void setButtonYes(String buttonYes) {
this.buttonYes = buttonYes;
}
public void setButtonYesByID(int buttonYesID) {
buttonYes = activity.getString(buttonYesID);
}
public String getButtonNo() {
return buttonNo;
}
public void setButtonNo(String buttonNo) {
this.buttonNo = buttonNo;
}
public void setButtonNoByID(int buttonNoID) {
buttonNo = activity.getString(buttonNoID);
}
public Collection<String> getTargetApplications() {
return targetApplications;
}
public void setTargetApplications(Collection<String> targetApplications) {
this.targetApplications = targetApplications;
}
public void setSingleTargetApplication(String targetApplication) {
this.targetApplications = Collections.singleton(targetApplication);
}
public Map<String, ?> getMoreExtras() {
return moreExtras;
}
public void addExtra(String key, Object value) {
moreExtras.put(key, value);
}
/**
* Initiates a scan for all known barcode types.
*/
//public boolean initiateScan() {
// return initiateScan(ALL_CODE_TYPES);
//}
/**
* Initiates a scan only for a certain set of barcode types, given as
* strings corresponding to their names in ZXing's {@code BarcodeFormat}
* class like "UPC_A". You can supply constants like {@link #PRODUCT_CODE_TYPES}
* for example.
*
* to download the app if a prompt was needed, or null otherwise
*/
public boolean initiateScan(Collection<String> desiredBarcodeFormats, String mode) {
Intent intentScan = new Intent(BS_PACKAGE + ".SCAN");
intentScan.addCategory(Intent.CATEGORY_DEFAULT);
intentScan.putExtra("SCAN_MODE", mode);
// check which types of codes to scan for
if (desiredBarcodeFormats != null) {
// set the desired barcode types
StringBuilder joinedByComma = new StringBuilder();
for (String format : desiredBarcodeFormats) {
if (joinedByComma.length() > 0) {
joinedByComma.append(',');
}
joinedByComma.append(format);
}
intentScan.putExtra("SCAN_FORMATS", joinedByComma.toString());
}
String targetAppPackage = findTargetAppPackage(intentScan);
if (targetAppPackage == null) {
showDownloadDialog();
return false;
}
intentScan.setPackage(targetAppPackage);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
attachMoreExtras(intentScan);
startActivityForResult(intentScan, REQUEST_CODE);
return true;
}
/**
* Start an activity.<br> This method is defined to allow different methods
* of activity starting for newer versions of Android and for compatibility
* library.
*
* @param intent Intent to start.
* @param code Request code for the activity
* @see android.app.Activity#startActivityForResult(Intent, int)
* @see android.app.Fragment#startActivityForResult(Intent, int)
*/
protected void startActivityForResult(Intent intent, int code) {
activity.startActivityForResult(intent, code);
}
private String findTargetAppPackage(Intent intent) {
PackageManager pm = activity.getPackageManager();
List<ResolveInfo> availableApps = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
if (availableApps != null) {
for (ResolveInfo availableApp : availableApps) {
String packageName = availableApp.activityInfo.packageName;
if (targetApplications.contains(packageName)) {
return packageName;
}
}
}
return null;
}
private void showDownloadDialog() {
Dialog d = new Dialog();
d.setTitle(title);
if (Dialog.show(title, message, "Yes", "No")) {
Uri uri = Uri.parse("market://details?id=" + BS_PACKAGE);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException anfe) {
// Hmm, market is not installed
Log.w(TAG, "Android Market is not installed; cannot install Barcode Scanner");
}
}
}
/**
* Defaults to type "TEXT_TYPE".
*
* @see #shareText(CharSequence, CharSequence)
*/
public boolean shareText(CharSequence text) {
return shareText(text, "TEXT_TYPE");
}
/**
* Shares the given text by encoding it as a barcode, such that another user
* can scan the text off the screen of the device.
*
* @param text the text string to encode as a barcode
* @param type type of data to encode. See {@code com.google.zxing.client.android.Contents.Type}
* constants.
* to download the app if a prompt was needed, or null otherwise
*/
public boolean shareText(CharSequence text, CharSequence type) {
Intent intent = new Intent();
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setAction(BS_PACKAGE + ".ENCODE");
intent.putExtra("ENCODE_TYPE", type);
intent.putExtra("ENCODE_DATA", text);
String targetAppPackage = findTargetAppPackage(intent);
if (targetAppPackage == null) {
showDownloadDialog();
return false;
}
intent.setPackage(targetAppPackage);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
attachMoreExtras(intent);
activity.startActivity(intent);
return true;
}
private static Collection<String> list(String... values) {
return Collections.unmodifiableCollection(Arrays.asList(values));
}
private void attachMoreExtras(Intent intent) {
for (Map.Entry<String, Object> entry : moreExtras.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
// Kind of hacky
if (value instanceof Integer) {
intent.putExtra(key, (Integer) value);
} else if (value instanceof Long) {
intent.putExtra(key, (Long) value);
} else if (value instanceof Boolean) {
intent.putExtra(key, (Boolean) value);
} else if (value instanceof Double) {
intent.putExtra(key, (Double) value);
} else if (value instanceof Float) {
intent.putExtra(key, (Float) value);
} else if (value instanceof Bundle) {
intent.putExtra(key, (Bundle) value);
} else {
intent.putExtra(key, value.toString());
}
}
}
}