| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.chrome.browser.nfc; |
| |
| import android.app.Activity; |
| import android.nfc.NdefMessage; |
| import android.nfc.NdefRecord; |
| import android.nfc.NfcAdapter.CreateNdefMessageCallback; |
| import android.nfc.NfcAdapter.OnNdefPushCompleteCallback; |
| import android.nfc.NfcEvent; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.text.TextUtils; |
| import android.widget.Toast; |
| |
| import org.chromium.base.ThreadUtils; |
| import org.chromium.chrome.R; |
| import org.chromium.chrome.browser.UmaBridge; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| /** |
| * Beam callback that gets passed to Android to get triggered when devices are tapped to |
| * each other. |
| */ |
| class BeamCallback implements CreateNdefMessageCallback, OnNdefPushCompleteCallback { |
| |
| private static class Status { |
| public final Integer errorStrID; |
| public final String result; |
| |
| Status(Integer errorStrID) { |
| assert errorStrID != null; |
| this.errorStrID = errorStrID; |
| this.result = null; |
| } |
| |
| Status(String result) { |
| assert result != null; |
| this.result = result; |
| this.errorStrID = null; |
| } |
| } |
| |
| // In ICS returning null from createNdefMessage will cause beam to send our market |
| // link so we need to hook to the return from the beam overlay to display the error. |
| // But in SDK_INT >= 16, beam won't activate, so the hook wouldn't go off. (b/5943350) |
| private static final boolean NFC_BUGS_ACTIVE = Build.VERSION.SDK_INT < 16; |
| |
| // Arbitrarily chosen interval to delay toast to allow NFC animations to finish |
| // and our app to return to foreground. |
| private static final int TOAST_ERROR_DELAY_MS = 400; |
| |
| private final Activity mActivity; |
| private final BeamProvider mProvider; |
| |
| // We use this to delay the error message in ICS because it would be hidden behind |
| // the system beam overlay. It is only accessed by the NFC thread |
| private Runnable mErrorRunnableIfBeamSent; |
| |
| BeamCallback(Activity activity, BeamProvider provider) { |
| mActivity = activity; |
| mProvider = provider; |
| } |
| |
| @Override |
| public NdefMessage createNdefMessage(NfcEvent event) { |
| // Default status is an error |
| Status status = new Status(R.string.nfc_beam_error_bad_url); |
| try { |
| status = ThreadUtils.runOnUiThread(new Callable<Status>() { |
| @Override |
| public Status call() { |
| String url = mProvider.getTabUrlForBeam(); |
| if (url == null) return new Status(R.string.nfc_beam_error_overlay_active); |
| if (!isValidUrl(url)) return new Status(R.string.nfc_beam_error_bad_url); |
| return new Status(url); |
| } |
| }).get(2000, TimeUnit.MILLISECONDS); // Arbitrarily chosen timeout for query. |
| } catch (TimeoutException e) { |
| // Squelch this exception, we'll treat it as a bad tab |
| } catch (ExecutionException e) { |
| // And this |
| } catch (InterruptedException e) { |
| // And squelch this one too |
| } |
| |
| if (status.errorStrID != null) { |
| onInvalidBeam(status.errorStrID); |
| return null; |
| } |
| |
| UmaBridge.beamCallbackSuccess(); |
| mErrorRunnableIfBeamSent = null; |
| return new NdefMessage(new NdefRecord[] {NdefRecord.createUri(status.result)}); |
| } |
| |
| /** |
| * Trigger an error about NFC if we don't want to send anything. Also |
| * records a UMA stat. On ICS we only show the error if they attempt to |
| * beam, since the recipient will receive the market link. On JB we'll |
| * always show the error, since the beam animation won't trigger, which |
| * could be confusing to the user. |
| * |
| * @param errorStringId The resid of the string to display as error. |
| */ |
| private void onInvalidBeam(final int errorStringId) { |
| UmaBridge.beamInvalidAppState(); |
| Runnable errorRunnable = new Runnable() { |
| @Override |
| public void run() { |
| Toast.makeText(mActivity, errorStringId, Toast.LENGTH_SHORT).show(); |
| } |
| }; |
| if (NFC_BUGS_ACTIVE) { |
| mErrorRunnableIfBeamSent = errorRunnable; |
| } else { |
| ThreadUtils.runOnUiThread(errorRunnable); |
| } |
| } |
| |
| @Override |
| public void onNdefPushComplete(NfcEvent event) { |
| if (mErrorRunnableIfBeamSent != null) { |
| Handler h = new Handler(Looper.getMainLooper()); |
| h.postDelayed(mErrorRunnableIfBeamSent, TOAST_ERROR_DELAY_MS); |
| mErrorRunnableIfBeamSent = null; |
| } |
| } |
| |
| /** |
| * @return Whether given URL is valid and sharable via Beam. |
| */ |
| private static boolean isValidUrl(String url) { |
| if (TextUtils.isEmpty(url)) return false; |
| try { |
| String urlProtocol = (new URL(url)).getProtocol(); |
| return urlProtocol.matches("http|https"); |
| } catch (MalformedURLException e) { |
| return false; |
| } |
| } |
| } |