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126 lines
5.8 KiB
126 lines
5.8 KiB
/* |
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* Copyright 2010-2013 Eric Kok et al. |
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* |
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* Transdroid is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Transdroid is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with Transdroid. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package org.transdroid.core.gui.search; |
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import android.annotation.SuppressLint; |
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import android.app.Activity; |
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import android.app.AlertDialog; |
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import android.app.DialogFragment; |
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import android.content.DialogInterface; |
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import android.content.DialogInterface.OnClickListener; |
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import android.content.Intent; |
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import android.net.Uri; |
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import android.text.TextUtils; |
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import org.transdroid.R; |
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import org.transdroid.core.app.search.GoogleWebSearchBarcodeResolver; |
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public class BarcodeHelper { |
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public static final int ACTIVITY_BARCODE_ADDTORRENT = 0x0000c0de; |
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// A 'random' ID to identify torrent adding scan intents |
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public static final int ACTIVITY_BARCODE_QRSETTINGS = 0x0000c0df; |
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// A 'random' ID to identify QR-encoded settings scan intents |
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public static final Uri SCANNER_MARKET_URI = Uri.parse("market://search?q=pname:com.google.zxing.client.android"); |
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/** |
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* Call this to start a bar code scanner intent. The calling activity will receive an Intent result with ID {@link |
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* #ACTIVITY_BARCODE_ADDTORRENT} or {@link #ACTIVITY_BARCODE_QRSETTINGS}. From there {@link #handleScanResult(int, |
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* android.content.Intent, boolean)} can be called to parse the result into a search query, in case of {@link |
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* #ACTIVITY_BARCODE_ADDTORRENT} scans. |
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* @param activity The calling activity, to which the result is returned or a dialog is bound that asks to install |
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* the bar code scanner |
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* @param requestCode {@link #ACTIVITY_BARCODE_ADDTORRENT} or {@link #ACTIVITY_BARCODE_QRSETTINGS |
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*/ |
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public static void startBarcodeScanner(final Activity activity, int requestCode) { |
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// Start a bar code scanner that can handle the SCAN intent (specifically ZXing) |
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startBarcodeIntent(activity, new Intent("com.google.zxing.client.android.SCAN"), requestCode); |
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} |
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/** |
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* Call this to share content encoded in a QR code, specially used to share settings. The calling activity will |
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* receive an Intent result with ID {@link #ACTIVITY_BARCODE_QRSETTINGS}. From there the returned intent will |
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* contain the data as SCAN_RESULT String extra. |
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* @param activity The calling activity, to which the result is returned or a dialog is bound that asks to install |
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* the bar code scanner |
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* @param content The content to share, that is, the raw data (Transdroid settings encoded as JSON data structure) |
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* to share as QR code |
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*/ |
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public static void shareContentBarcode(final Activity activity, final String content) { |
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// Start a bar code encoded that can handle the ENCODE intent (specifically ZXing) |
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Intent encodeIntent = new Intent("com.google.zxing.client.android.ENCODE"); |
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encodeIntent.putExtra("ENCODE_TYPE", "TEXT_TYPE"); |
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encodeIntent.putExtra("ENCODE_DATA", content); |
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encodeIntent.putExtra("ENCODE_SHOW_CONTENTS", false); |
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startBarcodeIntent(activity, encodeIntent, -1); |
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} |
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@SuppressLint("ValidFragment") |
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private static void startBarcodeIntent(final Activity activity, final Intent intent, int requestCode) { |
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try { |
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activity.startActivityForResult(intent, requestCode); |
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} catch (Exception e) { |
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// Can't start the bar code scanner, for example with a SecurityException or when ZXing is not present |
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new DialogFragment() { |
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public android.app.Dialog onCreateDialog(android.os.Bundle savedInstanceState) { |
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return new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert) |
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.setMessage(activity.getString(R.string.search_barcodescannernotfound)) |
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.setPositiveButton(android.R.string.yes, new OnClickListener() { |
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@Override |
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public void onClick(DialogInterface dialog, int which) { |
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if (activity != null) { |
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activity.startActivity(new Intent(Intent.ACTION_VIEW, SCANNER_MARKET_URI)); |
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} |
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} |
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}).setNegativeButton(android.R.string.no, null).create(); |
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} |
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; |
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}.show(activity.getFragmentManager(), "installscanner"); |
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} |
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} |
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/** |
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* The activity that called {@link #startBarcodeScanner(android.app.Activity, int)} with {@link |
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* #ACTIVITY_BARCODE_ADDTORRENT} should call this after the scan result was returned. This will parse the scan data |
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* and return a query search query appropriate to the bar code. |
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* @param resultCode The raw result code as returned by the bar code scanner |
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* @param data The raw data as returned from the bar code scanner |
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* @param supportsSearch Whether the application has the search UI enabled, such that it can use the scanned barcode |
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* to find torrents |
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* @return A String that can be used as new search query, or null if the bar code could not be scanned or no query |
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* can be constructed for it |
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*/ |
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public static String handleScanResult(int resultCode, Intent data, boolean supportsSearch) { |
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if (data == null || !data.hasExtra("SCAN_RESULT")) { |
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return null; |
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} |
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String contents = data.getStringExtra("SCAN_RESULT"); |
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String formatName = data.getStringExtra("SCAN_RESULT_FORMAT"); |
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if (formatName != null && formatName.equals("QR_CODE")) { |
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// Scanned barcode was a QR code: return the contents directly |
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return contents; |
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} else { |
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if (TextUtils.isEmpty(contents) || !supportsSearch) { |
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return null; |
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} |
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// Get a meaningful search query based on a Google Search product lookup |
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return GoogleWebSearchBarcodeResolver.resolveBarcode(contents); |
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} |
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} |
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}
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